Forecast Discussions mentioning any of
"HRRR" "RAP" "RUC13" "RUC" "RR" received at GSD on 12/21/22
Area Forecast Discussion
National Weather Service Cleveland OH
646 PM EST Tue Dec 20 2022
.SYNOPSIS...
A cold front moves into the area tonight, lingering across the
area Wednesday and Wednesday night before lifting back north as
a warm front on Thursday. A rapidly deepening low pressure
system is expected to lift northeast out of the Oklahoma
Panhandle Thursday into the Great Lakes region by Friday,
bringing a strong, arctic front across the region early Friday
morning. The low pressure system is expected to continue to
deepen while moving north away from the area with a trough
extending southward into the Great Lakes region Saturday and
Sunday.
&&
.NEAR TERM /THROUGH WEDNESDAY NIGHT/...
A weakening cold front moves southeast into the forecast area
tonight, settling south of Lake Erie Wednesday and Wednesday
night. Scattered cloud cover expected through Wednesday night,
with some sunshine likely appearing during the day on Wednesday.
Highs remain in the mid to upper 30s, though area south of the
front may get into the low 40s.
The front sags just far enough south for temperatures to drop
below freezing Wednesday night into early Thursday morning
before the front lifts back north as a warm front. Precipitation
begins to develop over the Ohio Valley Thursday morning, lifting
north into the local forecast area during the daytime hours.
Initial wave of precipitation Thursday morning may fall as mixed
precipitation (freezing rain and snow) before transitioning to
all rain. Very low impacts expected with the initial, brief
wintry mix due to low coverage and brief nature. Temperatures
rise back into the low 40s areawide by Thursday
afternoon/evening.
&&
.SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
There continues to be high confidence in a multi-hazard storm system
that will impact the entire forecast area from late Thursday night
through Saturday night with the main hazards, in order of severity:
winds, cold, and snow. Winter storm watches will be needed at some
point (possibly in the overnight package), but confidence remains
too low at this point to nail-down specific areas, especially given
the recent northward trend of the wrap-around snow and the possible
need for additional wind and/or cold headlines (either advisories or
warnings).
Meteorological Discussion and Forecast Challenges... There continues
to be consensus on a low pressure system developing over the
southern plains on Thursday morning and being picked up by a strong
upper level trough that will become negatively tilted with time.
This low pressure system will deepen to near 970 mb as it reaches
just north of Lake Ontario. Meanwhile, a roughly 1060 mb Arctic high
will enter down the spine of the Rockies and send in a shot of
extremely cold air across the region. The combination of the
deepening low and encroaching Arctic high will allow for a major
winter storm and strong cold front to impact the Great Lakes region.
As mentioned above, the latest guidance still suggests a potential
dry-slot developing immediately behind the cold front late Friday
morning and early afternoon. In addition, the wrap-around moisture
associated with the TROWAL Friday evening and overnight has also
trended slightly northwards. There still will be significant
precipitation impacts with the cold front Friday morning.
Precipitation should almost immediately switch over from rain to snow
along and behind the front, in addition to the possibility of a
flash freeze. Brief whiteouts are not out of the question with any
snow showers associated with the cold front.
Summary of Hazards:
Significant Winds... The wind potential with this storm system
remains the most significant hazard for the forecast area. With the
low pressure system deepening near the area on Friday and lingering
to the north on Saturday, there will be a prolonged period of strong
southwest winds across the region. The most concerning item remains
strong winds at the 850 and 925 mb layers respectively. Current
guidance is suggesting 925 mb winds on the order of 45 to 55 knots
with 850 mb winds of 65 to perhaps 75 knots. Mixing heights Friday
afternoon and evening are forecast to reach somewhere between the
925 and 850 mb layer, and thus the potential for intense and
damaging winds to reach the surface. In this forecast iteration, we
have slightly raised wind gusts, with 45 to 55 mph winds expected
across the entire forecast area. Wind gusts of 60 mph and perhaps
higher will be possible closer to the lakeshore, especially Friday
evening. Power outages are certainly possible and thus we suggest
taking the necessary time and steps to prepare in advance.
Extreme Cold... Forecast confidence remains the greatest of all
hazards for extreme cold for Friday through Sunday morning. With the
frontal passage late Thursday night/Friday morning, temperatures
will start around 40 degrees around Midnight and then fall to the
single digits by early Friday afternoon behind the front. This quick
drop in temperatures will pose a flash freeze threat as rain will
quickly change to snow and wet surfaces will freeze up due to the
cold and wind entering the region. This air mass will persist
through the short term period and through the weekend. It is
possible that some areas will not rise above the single digit mark
over a 48 hour period which could cause major infrastructure issues.
In addition, gusty winds across the region will result in
dangerously-cold wind chills; as low as -20 to perhaps -25 degrees F
in some spots Friday night. Sub-zero wind chills are expected to
persist through the weekend.
Snowfall...Confidence is slightly increasing on the snowfall
magnitude expected for the event, though it remains relatively low
compared to the cold and wind threats. As of now, our forecast calls
for a widespread 3 to 5 inches of snow early Friday morning into
Friday evening, with the precipitation along the front being the
main driver for accumulations. It is possible that wrap-around
moisture from the TROWAL may enhance some of these totals late
Friday, though recent guidance suggests a slight northward trend for
this potential. Additional lake enhancement and/or lake-effect snow
is possible across the snowbelt Friday night into Saturday, though
there remains disagreement on the magnitude and the placement of any
lake-effect bands that develop. At this point, the most likely
scenario is that southwesterly flow aloft would favor the highest
accumulations across western NY. Blowing and drifting snow is also a
concern for much of the area, given the strong winds and anticipated
"dry", high-ratio snow.
Please continue to follow the forecast over the next several days as
this storm system evolves and final headline decisions are made.
Prepare for a significant system with a range of wind, cold, and
snow impacts and anticipate disruptions for holiday travel plans
towards the end of the week. We want to ensure that all folks have a
safe Christmas and holiday season, even with this approaching
system.
&&
.LONG TERM /SATURDAY THROUGH TUESDAY/...
Below-average temperatures and dangerously-cold wind chills will
persist through the first half of the long-term period with the
arctic air mass overhead. High temperatures on Saturday will
struggle to get out of the single digits with wind chills of -15 to -
20 degrees F likely, even during daylight hours. We`ll also need to
monitor any lake-effect snow, though as mentioned above, the most
plausible scenario is for any lake-effect band that develops to
favor western NY. Temperatures will try to improve on Sunday with
more teens appearing in the forecast, though wind chills will remain
sub-zero. By early next week, temperatures will finally rebound into
the 20s area-wide, though will remain below-average. We`ll need to
monitor another system on Tuesday, albeit on the weaker side, for
the potential of light snow accumulations.
&&
.AVIATION /00Z Wednesday THROUGH Sunday/...
VFR across the board this evening. A weakening cold front moves
in from the northwest tonight, and currently has an area of MVFR
stratus in tow upstream over the Great Lakes. Based on upstream
trends, GLAMP guidance and HRRR forecast soundings did elect to
bring prevailing MVFR cigs in to most sites starting late
tonight or early Wednesday. These will gradually scatter
out/dissipate Wednesday afternoon. Did not bring CAK and YNG to
MVFR yet due to the expectation that drier air will eventually
stop the progression of the stratus farther south/east. Forecast
soundings suggest some sites, such as FDY and especially MFD,
may flirt with IFR cigs Friday morning, but confidence is low.
Will analyze upstream trends next cycle for this potential, as
there currently aren`t any IFR cigs upstream. Winds remain
fairly light and variable through the TAF period.
Outlook...A low pressure system moving into the Great Lakes
region will bring non-VFR with rain on Thursday, changing over
to snow on Friday and Friday night. Lake effect snow may develop
on Saturday and Sunday. Very strong winds with gusts exceeding
40 knots are expected Friday through Saturday.
&&
.MARINE...
A storm watch has been issued for all of Lake Erie starting at 12Z
Friday with a current end time of 15Z Saturday for the western basin,
and 0Z Sunday for the rest of the lake. A very strong cold front
will move west to east across the lake Friday morning, ushering in
strong, southwesterly winds of 40 to 50 knots with higher gusts of
60 to perhaps 65 knots possible. These strong, southwesterly winds
will persist through Friday into Saturday. Low water is also
possible across the western basin of the lake, with current
forecasts suggesting water levels to fall as low as 3 to 4 feet
below the low water datum. Finally, in addition to the strong winds,
an anomalously-cold air mass will descend south across the Great
Lakes. Heavy freezing spray will be likely across much of the lake
beginning Friday afternoon with the threat persisting through
Saturday. A Heavy Freezing Spray Watch may be needed going forward.
Conditions will begin to improve from west to east across the lake
on Sunday, though we may need additional headlines (Small Craft)
with continued west to southwesterly winds of 15 to 25 knots.
&&
.CLE WATCHES/WARNINGS/ADVISORIES...
OH...None.
PA...None.
MARINE...Storm Watch from Friday morning through Saturday morning for
LEZ142>144-162>164.
Storm Watch from Friday morning through Saturday evening for
LEZ145>149-165>169.
&&
$$
SYNOPSIS...Saunders
NEAR TERM...Saunders
SHORT TERM...Kahn
LONG TERM...Kahn
AVIATION...Sullivan
MARINE...Kahn
Area Forecast Discussion
National Weather Service Cheyenne WY
732 PM MST Tue Dec 20 2022
.UPDATE...
Issued at 723 PM MST Tue Dec 20 2022
Made a quick update before the start of the nighttime/early
morning forecast package later tonight. Forecast appears on track
with high winds getting going across the Arlington/Elk Mountain
area late this evening with a few gusts of 55 MPH observed so far.
These winds will continue to increase and spread eastward into
the high plains over the next 12 hours ahead of the arctic front
plunging south out of Canada. This front is just starting it`s
trip south with temperatures in northern Montana lowering between
-20 to -25 over the last hour. The front is still expected to
enter the forecast area (Converse and Niobrara Counties) between 7
to 9 am Wednesday morning and then accelerate southward towards
the Colorado border through noon.
UPDATE Issued at 300 PM MST Tue Dec 20 2022
Forecast remains on track for strong winds across portions of
southeast Wyoming returning tonight, strong frontal passage
during the day Wednesday with snowfall and rapid drop in
temperatures, and the frigid arctic air leading to extremely
dangerous wind chills Wednesday night through Friday morning. This
discussion provides a quick update on these hazards with the
latest forecast package.
Decide to upgrade the High Wind Watches to Warnings beginning this
evening for the Central and South Laramie Range. Forecast models
persisted with the strong upper level flow and downward omega
across the Laramie Range and adjacent foothills. Additionally,
bumped up the start time for the remaining areas in
Carbon/Albany/Converse County to 5 AM MST with 700mb flow
increasing a little sooner with a slightly quicker arrival of the
upper level trough (will get to more about this in a moment). NBM
v4.1 probability of exceeding 48 kt gusts shows over 60% for most
of the warned area while in-house guidance continues to show
support these winds ahead of the frontal passage.
Looking at most hi-res guidance, appears that the frontal timing
as sped up by a few hours with initial entry into northern
portions of the CWA by 8 AM MST. Timing the rest out, looks to
reach the North Platte River valley (Scottsbluff/Torrington) right
around 11 AM MST and Cheyenne around 2 PM MST while crossing the
Colorado border to the east a little earlier. Hi-res guidance
continues to hint at nearly 30F degree temperature drops behind
the front in the first hour or two after its passage. Decide to
blend forecast grids more with hi-res guidance to reflect a
sharper temperature gradient and earlier arrival. This timing
will be a little more delayed west of the Laramie Range, however
forecast soundings indicate snow squall potential with around 100
J/kg of low level instability present. Winter Weather Advisories
were added for most locations Wednesday across Carbon and Albany
counties in addition to the I-25 corridor from Cheyenne to
Wheatland with the potential for a quick 1-3 inches of snowfall in
addition to the flash freeze behind the front making for slick
road conditions in the afternoon and evening hours. These
locations had more confidence in more widespread effects, but will
need to monitor radar/satellite trends tomorrow within the
advisory area and farther east into the Nebraska Panhandle as
Snow Squall Warnings may be needed for the highest intensity
snowbands. These advisories run through 5 PM Wednesday as the
frontal forcing will quick move through the CWA, however will need
to monitor for potential lingering effects with possible upslope
along the South Laramie Range. Areas around Cheyenne could see
light snowfall continuing into Wednesday evening and latest SREF
guidance even suggests higher snowfall totals could be possible.
Temperatures will continue to plunge behind the front through
Thursday morning. Latest forecast has Cheyenne dropping ~60F
degrees between early afternoon Wednesday to Thursday morning.
Latest forecast trends looked to slide the trough a little quicker
to the east displacing the core of coldest 700mb temps from our
areas. So did slightly nudge temperatures upward, but they still
remain frigid. Thursday morning lows will still be widespread 20
to 35 degrees below zero with wind chills feeling 40 to 65 degrees
below zero which will be extremely dangerous and life threatening!
Wind Chill Warnings remain in effect at this time continuing
through the day Thursday, which won`t see high temperatures above
zero, and into Friday morning.
As for the long term, still looks to warm up nicely headed into
the weekend. While temperatures will drop hard late in the week,
we could be looking at a 50-60F degree temperature swing from
Friday morning to Sunday afternoon. Additionally, decide to keep
the uptick in the winds by blending in NBM 90th percentile with
strong flow aloft returning with tightening gradients and a quick
passing shortwave to the northeast.
&&
.SHORT TERM...(Today through Thursday)
Issued at 426 AM MST Tue Dec 20 2022
...EXTREMELY DANGEROUS AND POTENTIALLY LIFE THREATENING COLD WAVE
SET TO IMPACT THE REGION...FARM AND RANCH INTERESTS SHOULD MAKE
FINAL PREPARATIONS NOW...
...HIGH WINDS AND PERIODS OF SNOW AND BLOWING SNOW ALSO EXPECTED
WITH THE ARCTIC FRONT...
An active 24 to 48 hours ahead for southeast Wyoming & the western
Nebraska Panhandle w/ multiple significant, high-impact hazards to
impact the CWA. Strong winds impacting the southeast Wyoming wind-
corridors early this morning will become more widespread tonight &
Wednesday. Mountain snow is likely to develop across the Snowy and
Sierra Madre ranges later this afternoon, likely becoming heavy by
mid-day Wednesday. Widespread light to moderate snowfall is likely
along the cold front on Wednesday morning and afternoon, with some
locally intense banding & snow squalls likely. Extremely dangerous
and potentially life-threatening wind chills are likely to rapidly
develop behind the cold front with serious impacts possible to the
livestock and agricultural communities, as well as more vulnerable
human populations, especially Wednesday night through early Friday
morning.
Wind gusts of 65 to 70 MPH have been common near Arlington and Elk
Mountain early this morning. This is likely the result of enhanced
H85 CAG-CPR gradients near 70 meters between lee troughing along &
east of the Laramie Range & the surface high over western Colorado
currently in place. These gradients may diminish somewhat over the
next few hours, but steep low-level lapse rates combined w/ around
45 knots of 700-800 millibar flow should be sufficient to keep the
gusts elevated above 45-50 MPH through the day. After 00z, CAG-CPR
gradients will rapidly increase yet again as the lee trough should
intensify in response to difluent flow in advance of a significant
mid-level short wave diving into the Intermountain West. Local in-
house probabilistic guidance suggests a strong signal for gusts 60
MPH or stronger after 03z this evening, leading to the decision to
extend the current warning through 00z Thursday. Would expect this
to be cancelled a few hours early once the front passes around mid
day Wednesday. A similar scenario can be expected for the southern
Laramie Range including the I-80 Summit, with H75 flow near 60 kts
requiring High Wind Warning issuance through 11 AM MST today. Will
see a decent decrease in speeds this afternoon, but a west to east
oriented MSLP gradient on the order of 4-6 millibars will begin to
take shape between Laramie & Cheyenne after 03z this evening along
with a sharp omega couplet / mountain wave signal and 55 to 65 kts
of H7-H8 flow. This should be more than sufficient for gusts to 65
to 75 MPH overnight through mid-day Wednesday prior to the passage
of the arctic front. These winds could even spill east into Platte
County. A High Wind Watch has been issued for the Southern Laramie
Range and adjacent Foothills, as well as much of Platte County, to
include Wheatland, Glendo, and the Coleman WYDOT sensor.
Extreme MSLP gradients are expected with the passage of the arctic
front on Wednesday. Significant low-level mixing will likely occur
ahead of the boundary, with models in good agreement with 50 to 55
knots of 0.5 km flow in place across much of southeast Wyoming for
areas mainly along west of I-25. High-res model guidance including
the HRRR suggests widespread 55 to 65 MPH gusts developing between
15z and 21z prior to fropa w/ gusts decreasing to a slightly more-
manageable 30 to 40 MPH in the late afternoon & evening behind the
cold front. Have opted for a High Wind Watch from 15z Wednesday to
00z Thursday for much of southeast Wyoming given the fairly strong
support from high-res model guidance, even though this event could
be just a few hours in duration at most. All warning-criteria wind
gusts should cease immediately post-fropa, but it will remain very
windy nonetheless. In addition to the threat for high winds as the
front approaches, banded snow is likely near the frontal zone with
very strong frontogenesis at H7. This locally intense banding with
possible snow squalls could drop a quick several inches of snow w/
significant travel impacts due to blowing snow as well. This seems
like a scenario where Snow Squall Warnings may be favored over the
need for Winter Weather Advisories as the threat for precipitation
should be fairly short lived as well, so did not go w/ any winter-
precipitation hazards at this time.
The most dramatic, and likely most serious part of this storm will
be the likelihood of extremely dangerous and life threatening wind
chill values potentially exceeding 50-60 degrees below zero. Near-
record breaking high pressure is still expected to slide southward
across western Montana on Thursday w/ the GFS still suggesting the
1066 mb central pressure hear Helena which would exceed the record
for the contiguous US set in 1983. As such, this will certainly be
one of the coldest air masses to impact the area in recent years &
perhaps decades. NAEFS/EPS guidance continues to indicate both 700
and 850 mb temperatures outside of climatology with several of the
deterministic models (GFS/GEM/ECM) all showing H7 temperatures -30
deg C or colder over most of the CWA by 12z Thursday. As the cold-
front blasts south on Wednesday afternoon, high-res models suggest
that temperatures may fall 30 to 40 degrees in an hour or less. If
fropa is accompanied by a snow squall, this may be a serious flash
freeze event as well. Unlike the typical extreme cold events which
are driven by lighter winds and radiational cooling, this one will
be driven by strong winds w/ model soundings showing a deep, well-
mixed boundary layer with average flow of 25 to 35 kts expected to
reside within the lowest 1k feet AGL. That said, we could actually
see temperatures of -25 to -35 deg F with sustained winds over 25-
30 MPH! This is extremely rare and is arguably more dangerous than
your typical wind chill event where winds are less than 10 MPH. If
there are any uncertainties at all, it is exactly how cold we will
get as it is usually tough to see extreme cold when winds are this
strong. Even so, NBM v4.1 has remained very consistent with 80-100
percent probabilities of -20 F or colder actual air temperatures &
50th percentiles MinT of -24 to -34 deg F Thursday night for most,
if not all of the CWA. Official forecast was blend of 25-25-50 NBM
10th, 25th, and 50th percentiles, respectively. Prefer to hedge on
the lower side for highly anomalous air masses.
These MinT values, combined with the expected wind speeds yield WC
values under 50 degrees below zero for most zones, perhaps even as
cold as 70 degrees below zero near Lusk. Frostbite and hypothermia
can develop in mere minutes in these conditions, and unfortunately
death is a very real possibility in this scenario, especially with
more vulnerable human populations. Farmers & ranchers are strongly
advised to make final preparations to protect livestock. We cannot
stress enough the seriousness of this situation! While the coldest
wind chills will likely occur Wed night and Thu AM, highs on Thurs
will remain below zero for many with winds staying elevated. There
will not be much improvement whatsoever through Friday. Wind Chill
Watches have been upgraded to Wind Chill Warnings area-wide.
In the mountains, due to the expected significant orographics with
a 180+ knot H25 jet (90-100 knot H5 jet), high-elevation snow fall
accumulations of 8 to 15 inches will be possible in both the Snowy
and Sierra Madre ranges. This combined w/ strong winds will create
near blizzard conditions in the high country, and given the degree
of wind chills, could be very serious should anyone become lost in
these conditions. A Winter Storm Warning has been issued for these
zones through 12z Thursday, followed by a Wind Chill Warning.
.LONG TERM...(Thursday night through Monday)
Issued at 426 AM MST Tue Dec 20 2022
The main story for the beginning tier of the extended forecast
continues to be the unprecedented cold temperatures that will
stick around on Thursday night into early Friday. Model guidance
trends continue to show dangerous cold temperatures and wind
chills through Friday morning. It wouldn`t be Wyoming if we didn`t
also include the potential for our typical strong high winds to
ramp up again during the extended period for the wind prone
corridors as well. However, slightly above average temperatures
are favored by the end of our extended forecast into the 30s and
40s.
A dome of 1055mb surface high pressure will be firmly entrenched
across central and northern WY by Thursday evening. Brutally cold
temperatures will exist across a majority of the cwa to start the
forecast period of Thursday night. 700mb temperatures of -15C to
-25C are expected to persist across the NE Panhandle. However,
model guidance from the GFS and Canadian deterministic is
beginning to pinpoint areas where the pressure gradients are
potentially going to tighten overnight. Pressure gradients of
5-15mb over the course of six hour periods will likely result in
700mb winds approaching 45-55 knots between 0Z-12Z Friday. Omega
fields do show alternating positive and negative lift zones, and
500mb analysis depicts a mountain wave signature. It will be a
tricky overnight forecast to pin down due to the potential for
downsloping effects from the low and mid-levels warming
adiabatically overnight. We could easily see negative sub-zero
temperatures initially, and then quickly warming up into the
positive teens to potentially 20s where the strongest wind gusts
exists along and due east of the wind prone corridors. Strong
northwest flow aloft is also anticipated to create orographic
enhancement of snow showers for the Snowy/Sierra Madre mountains
as a shortwave disturbance approaches the Intermountain west from
early Friday through Friday afternoon.
The cold air will persist through Friday evening for the NE
Panhandle forecast zones as strong CAA continues to funnel into the
region. Forecast highs in the single digits to teens are expected at
this this point for the NE Panhandle. However, southeast WY will see
a rise in temperatures as downslope winds continue to adiabatically
warm a large portion of those areas. Wouldn`t be surprised to see
20s to potentially near 30 degrees F in localized areas due east of
the Laramie Range on Friday, but there will be a sharp gradient.
Have not bumped up temperatures to reflect this entirely as some of
the model guidance is not in agreement with this solution presently.
WAA will occur beginning Friday night as heights in the lower and
mid-levels begin to increase thanks to an upper level ridge
amplifying. Some members of the extended guidance have a shortwave
riding along the northwest flow aloft Friday night into Saturday
afternoon. This shortwave is expected to slide to our south with
most of its energy, bringing snowfall to the mountains west of the
Laramie Range, but QPF looks low. Daytime highs will be in the 20s
and 30s on Saturday. Localized downslope warming is possible on
Saturday east of the Laramie Range thanks to gusty winds making a
return to the area. At this time of inspection, the wind prone/gap
corridors of Bordeaux and Arlington/Elk Mountain are favored for
strong winds of 50-60mph on Saturday. Additional upper level ridge
amplification is expected on Sunday into Monday, with near seasonal
to above average temperatures in the 30s and 40s. Tuesday will see
additional upper level ridge amplification, and daytime highs in
the 30s and 40s are also favored, with possible localized areas as
warm as the lower 50s.
&&
.AVIATION...(For the 00Z TAFS through 00Z Wednesday evening)
Issued at 420 PM MST Tue Dec 20 2022
Wyoming TAFS...VFR, with ceilings lowering to low VFR after
20Z Wednesday. Areas of blowing snow with visibilities around 6SM
at Rawlins from 08Z to 21Z. Wind gusts of 35 to 50 knots. Low
level wind shear at Rawlins from 14Z to 21Z, at Laramie from 08Z
to 18Z, and at Cheyenne from 09Z to 20Z.
Nebraska TAFS...VFR, with ceilings lowering to low VFR or high
MVFR after 16Z Wednesday. Wind gusts to 40 knots after 16Z
Wednesday. Low level wind shear from 02Z to 18Z.
&&
.FIRE WEATHER...
Issued at 426 AM MST Tue Dec 20 2022
Extreme cold temperatures & widespread light to moderate snow
will keep fire weather concerns limited Wednesday through Friday.
&&
.CLIMATE...
Issued at 300 PM MST Tue Dec 20 2022
Widespread lows Thursday morning will likely be colder than 20F
degrees below zero for much of the CWA. Cheyenne`s record low is
28F degrees below zero set in 1990, which also happens to be the last
time temperatures dropped as low as the current forecast. This is
also the December monthly low temperature. Across the Nebraska
Panhandle sites, record low temperatures are closer to 40F degrees
below zeros mostly set in 1989.
THU Lows Record
Cheyenne.... -24F -28F
Laramie..... -22F -34F
Rawlins..... -25F -32F
Scottsbluff. -26F -42F
Chadron..... -27F -40F
Alliance.... -30F -42F
Sidney...... -26F -39F
&&
.CYS WATCHES/WARNINGS/ADVISORIES...
WY...Wind Chill Warning from 5 AM Wednesday to 11 AM MST Friday for
WYZ101>103.
Wind Chill Warning from noon Wednesday to 11 AM MST Friday for
WYZ107-108-118-119.
High Wind Warning from 5 AM to 5 PM MST Wednesday for WYZ101-104-
105-109-111-113-115-118.
Winter Weather Advisory from 9 AM to 5 PM MST Wednesday for
WYZ104>107-109>111-113-115>118.
Wind Chill Warning from 2 PM Wednesday to 11 AM MST Friday for
WYZ104>106-109>111-113-115>117.
High Wind Warning until 5 PM MST Wednesday for WYZ106-107-116-
117.
High Wind Warning until 5 PM MST Wednesday for WYZ110.
Winter Storm Warning until 5 AM MST Thursday for WYZ112-114.
Wind Chill Warning from 5 AM Thursday to 11 AM MST Friday for
WYZ112-114.
NE...Wind Chill Warning from 5 AM Wednesday to 11 AM MST Friday for
NEZ002-003-095-096.
Wind Chill Warning from noon Wednesday to 11 AM MST Friday for
NEZ019>021-054-055.
&&
$$
UPDATE...TJT
SHORT TERM...CLH
LONG TERM...BW
AVIATION...RUBIN
FIRE WEATHER...CLH
CLIMATE...MB