Forecast Discussions mentioning any of "HRRR" "RAP" "RUC13" "RUC" "RR" received at GSD on 12/05/19

Area Forecast Discussion
National Weather Service La Crosse WI
548 PM CST Wed Dec 4 2019 .SHORT TERM...(This evening through Thursday) Issued at 1589 PM CST Wed Dec 4 2019 Another quiet and mild day across the area with highs ranging from the 30s to low 40s as of 2 pm. Some low to mid clouds were present across parts of western and north-central Wisconsin this afternoon associated with a large scale upper trough located to the east of the region. Mid to high clouds increase late tonight into Thursday as an upper shortwave trough glides southeast across southern Canada/the far northern Upper Mississippi River Valley. There are some models picking up on the development of patchy fog overnight across southeast Minnesota where a snowpack is present. However, confidence in this occurring is currently low. Overnight lows will range from the middle teens to 20s. On Thursday a weak cold front will move across the area, bringing light precipitation chances mainly to north-central Wisconsin from late Thursday morning into the afternoon hours. Mostly light snow is expected with minimal to no accumulations. However, as the shortwave trough pushes east and ice is lost in the mid to upper levels, a short period of light freezing drizzle will be possible late Thursday afternoon/early evening over north-central Wisconsin. Further south and west, some flurries or sprinkles cannot be ruled out, but the better precipitation chances will remain further north near the better forcing. High temperatures on Thursday will range from the 30s to low 40s. .LONG TERM...(Thursday night through Wednesday) Issued at 159 PM CST Wed Dec 4 2019 High pressure builds in Thursday night with clearing overnight. Cold air advection/clearing will produce overnight lows in the teens to mid 20s. Friday will be a mostly sunny but rather chilly as that area of high pressure drifts overhead. Plan on highs mainly in the 20s -perhaps a few lower 30s across far northeast IA/southwest WI. Warm air advection kicks in Friday night into Saturday on the backside of the high as it drifts into the eastern CONUS. After lows in the teens/lower 20s Friday night, plan on highs Saturday well into the 30s, possibly a few lower 40s across far northeast IA/southwest WI. Sunday will see a cold front sliding southeast into the area. Main moisture feed/convergence/saturation with this boundary appears to stay northeast of the area but will see an increase in cloud cover. However cannot rule out a stray sprinkle or two as the front passes through. Otherwise, warm air advection ahead of the front before it comes through will push highs into the mid 30s to mid 40s. Incoming mid-level trough/vorticity spins up weak surface cyclogenesis somewhere across MO/IA/IL Sunday night, moving northeast into the Great Lakes region Monday/Monday night. This brings deformation area snow up into our area with some light accumulations. A blast of modified Arctic air advects into the Upper Mississippi River Valley region Tuesday, settling in for Wednesday. Plan on highs in the single digits/teens. Overnight lows Tuesday night look to be in the single digits above and below zero.&& .AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon) Issued at 1136 AM CST Wed Dec 4 2019 VFR conditions expected through the remainder of this afternoon into tonight. West-northwest winds around 12 kts will lessen this evening and turn more southerly overnight. Mid to high clouds spread in late tonight into Thursday, with some models picking up on some fog development mainly out west where a snowpack is present. However, with no indications of low clouds or even any fog present upstream, confidence is rather low on this occurring. Added a MVFR group for a few hours at KRST overnight, but with this being rather conditional, it will need to be monitored or refined for later issuances. Otherwise, VFR conditions likely Thursday morning into the early afternoon hours, with winds generally below 10 kts. && .AVIATION...(For the 00Z TAFS through 00Z Thursday evening) Issued at 548 PM CST Wed Dec 4 2019 An area of high pressure will drift across the region tonight. Some concern about fog formation underneath the high, especially over areas where there has been melting snow the past few days. There should also be an increase in mid level clouds overnight as a short wave trough scoots across southern Canada toward the Great Lakes. Forecast soundings from both the 04.12Z RAP and 04.18Z NAM show winds of 10+ knots just above the surface at the top of the shallow saturated layer. This along with the increasing mid level clouds could preclude the fog formation, but for continuity, will continue to show some MVFR conditions with a little bit of fog for KRST. The short wave trough will push a cold front across the area Thursday afternoon. Short range guidance is suggesting the MVFR ceilings will develop behind the cold front and spread across the area. However, looking at forecast soundings again, there is no signal for these clouds and will keep both sites VFR for now. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. IA...None. && $$ SHORT TERM...NMB LONG TERM...DAS AVIATION...04
Area Forecast Discussion
National Weather Service Bismarck ND
638 PM CST Wed Dec 4 2019 .UPDATE... Issued at 636 PM CST Wed Dec 4 2019 Models suggest the potential for slantwise convection exists with the wave grazing our northeast counties late tonight into tomorrow morning, especially in the RAP which simulates large areas of negative EPV. Another factor that could locally enhance snowfall is low level northerly flow generating orographic lift in the Turtle Mountains area. Because these ingredients are present, decided to raise potential snow amounts to near one inch in the Turtle Mountains. However, the probability of occurrence remains around 30 percent, mainly due to a lack of deep moisture. Another signal that is emerging in recent model guidance is the potential for stronger winds along and behind the cold front that moves south across our area tomorrow morning. Strong pressure rises and cold air advection favor winds towards the high end of guidance, but low level lapse rates are not steep, which may inhibit 20-30 kt low layer winds from being mixed down to the surface. && .SHORT TERM...(This evening through Thursday) Issued at 128 PM CST Wed Dec 4 2019 Cloud cover will increase this evening with skies becoming overcast across nearly all of western and central North Dakota tonight as a surface cold front begins moving southward through the area. Some patchy fog is possible across central North Dakota this evening/tonight before the cold front passes. Cold air advection associated with this front will help temperatures drop into the mid teens across northern North Dakota tonight with warmer temperatures in the 20s expected south. An upper-level wave swings out of southern Canada and into far northern North Dakota tomorrow morning. Short- term models indicate enough upper level ascent will present to spark some light snow with this passing wave. The rest of Thursday should be mostly cloudy and cool with north winds. .LONG TERM...(Thursday night through Wednesday) Issued at 128 PM CST Wed Dec 4 2019 Becoming colder by the end of the weekend, with widespread snow possible Sunday through Sunday night. Significant snow amounts are not expected. Temperatures will warm back up on Friday and Saturday as warm air advection returns with southwesterly to westerly surface winds developing. Highs will be warmest across western North Dakota, mainly in the low to mid 40s. Highs in the 30s can be expected across central North Dakota, especially where snowpack is still significant. Precipitation chances return to the area late Saturday night through Sunday night, as a series of two upper level shortwaves and surface cold fronts move through North Dakota. A widespread swath of snow is expected Sunday through Sunday night, with most of western and central North Dakota picking up at least an inch by Monday morning. From a forcing perspective, it appears mid level lapse rates will be steep enough to support a brief period of moderate snow where frontogenetical forcing is the strongest. Some areas could see slightly higher amounts than an inch, possibly 3 to 4 inches. There is still plenty of uncertainty regarding the location of the slightly higher amounts as the 12z GFS/EURO deterministic runs still disagree quite a bit with QPF location. In addition, the GEFS plumes are still showing lots of ensemble member spread for the QPF forecast. Although dry weather is expected Monday and Tuesday, it will be very cold. The GFS/EURO both show 850 mb temperatures falling down to 20 to 25 below zero by Tuesday, with the NBM suggesting highs around zero degrees north central to the teens southwest. Below zero temperatures are expected Monday night and Tuesday night across most of North Dakota. && .AVIATION...(For the 00Z TAFS through 00Z Thursday evening) Issued at 636 PM CST Wed Dec 4 2019 All terminals start this forecast period with VFR conditions. A cold front will move from north to south across the area late tonight through Thursday morning. MVFR to near IFR ceilings are expected with the arrival of the cold front. These lower ceilings are forecast to linger into Thursday afternoon and then begin lifting from north to south. The cold front may also bring a period of gusty north-northwest winds, potentially as strong as 25 kts. && .BIS WATCHES/WARNINGS/ADVISORIES... NONE. && $$ UPDATE...Hollan SHORT TERM...AJ LONG TERM...AJ AVIATION...Hollan
Area Forecast Discussion
National Weather Service Denver/Boulder CO
835 PM MST Wed Dec 4 2019 .UPDATE... Issued at 821 PM MST Wed Dec 4 2019 No significant adjustments to the grids at this time. Still looks like the next system will move across Colorado on Thursday. Should see an increase in cloudiness from west to east overnight. Spatial cross-sections show the best upslope will be late Thursday morning to late afternoon. Weak mid level QG omega over northeastern CO through 18z then QG descent. Trend from potential rain showers in 15z-18z transitioning to snow showers in the afternoon still looks reasonable with just light snowfall expected. All this reflected in the grids so will stay the course. && .SHORT TERM...(This evening through Thursday) Issued at 315 PM MST Wed Dec 4 2019 A Pacific storm system continues to approach Colorado. Based on the latest GOES-16 water vapor imagery, the trough is slowly moving east across California. Several lobes of vorticity maxima are rotating around the main trough. The trough moves almost due east between now and early Friday, with the trough axis passing overhead Thursday afternoon. It`s a relatively quick moving system with some moisture to work with. The system is again a bit slower getting to Colorado per latest model guidance, so we expect snow to begin in the mountains until after midnight tonight. The best synoptic forcing is focused across the southern half of Colorado, with weaker lift expected across our area. Cold advection at 700 mb should help with the snow showers in the mountains, as it goes from 0 degC at 5 AM Thursday down to -5 degC by 5 PM. The flow along the west slope, although upslope, is weak because the core of the trough passes just to our south. Thus, we are not anticipating highlights for the mountains and snow rates in general shouldn`t be higher than light to moderate, and if moderate only for a little while as the trough axis passes overhead early Thursday afternoon. Snow totals could reach 6 inches across the most favored location across the Park, Gore, and Front Range above 9,000 feet. Elsewhere totals should be in the 1-5 inch range. Across the plains, there is actually uncertainty about the p-type! Not the most common thing to have to deal with in December. However, there isn`t really much of a cold front, it`s more of a wind shift to the north-northeast after 6 AM across the Wyoming border, reaching Denver metro around 8 AM or so. Temperatures will already be in the mid to upper 30s by midday, and wet bulb temperatures should be in 31-35 deg as well. The 700 mb temps drop to around -5 degC by late afternoon, which should help transition just about all of the plains over to snow. Late morning, precipitation chances increase with weak upslope and the trough axis approaching. It will probably start off as rain showers until enough cold air (and perhaps a little heavier precipitation) is advected into our area after 2 PM. It should be snow after that but amounts will be light and we don`t anticipate any impacts given temperatures in the low to mid 30s during the precipitation. Parts of Weld County may not changeover to snow at all with just enough downslope off the Cheyenne ridge. It should be noted that the HRRR consistently keeps the precipitation as liquid across just about all of the plains below 5800 feet elevation until the very end of the event. We are not agreeing with the HRRR for this event given wet bulbing and an overly optimistic warming in the HRRR. Total snow amounts should be an inch, at most two, and mostly on grassy surfaces. The trough moves quickly east with strong subsidence in it`s wake, resulting in a sharp cutoff on the precipitation from west to east, ending across the I-25 corridor by 6-7 PM, the far eastern plains by 9 PM, if not sooner. .LONG TERM...(Thursday night through Wednesday) Issued at 315 PM MST Wed Dec 4 2019 Thursday evening should see the weak and fast moving upper disturbance making its way out of the state. Lots of subsidence will be moving into the state, bringing precipitation to an end, both in the mountains and out across the plains. Friday and Saturday will see a strong upper ridge build over the Desert Southwest, with dry and warmer weather across Colorado. Winds aloft will decrease over time as the ridge axis moves across the state. Temperatures will climb to slightly warmer than normal. As the weekend comes to an end, the upper ridge will give way to an amplifying upper trough working its way down from the Pacific Northwest. The ECMWF and GFS both show this upper trough remaining open as it migrates eastward early next week. The curvature of the trough and jet level dynamics should produce a period of rising motions across Colorado from Sunday afternoon through Monday morning. This will be the next chance of precipitation across the forecast area, but once again it looks like it will be a rapidly moving upper level system. There will be a fair shot of cold air also coming down with the trough, so we will see if later model runs show any additional development as the trough approaches. For now the forecast will be a generally worded chance of snow and cooler temperatures. The unsettled weather should then last into Tuesday as cyclonically curved northwesterly flow continues. && .AVIATION...(For the 06Z TAFS through 06Z Thursday night) Issued at 821 PM MST Wed Dec 4 2019 VFR conditions will continue through 5 am Thursday. A storm system will impact the metro area terminals after 8 am, with ceilings gradually lowering to MVFR after 8 AM. Light rain showers are possible by 11 am. Colder air in the afternoon with a a changeover to snow or a rain/snow mix by mid afternoon, most likely after 2 PM. The impact to the runways should be minimal, as temperatures in the low to mid 30s should keep them wet throughout the afternoon. With any snow, ceilings may reach IFR. We expect generally light snow rates, mainly between 2-5 PM. IFR to MVFR CIGs will continue into early Friday. Winds from Thursday mid-morning through early Friday morning should be out of the north, with strongest winds 10-15 kts occurring sometime Thursday afternoon. && .BOU WATCHES/WARNINGS/ADVISORIES... None. && $$ UPDATE...Cooper SHORT TERM...Schlatter LONG TERM...Dankers AVIATION...Cooper
Area Forecast Discussion
National Weather Service Hastings NE
559 PM CST Wed Dec 4 2019 .SHORT TERM...(This evening through Thursday) Issued at 112 PM CST Wed Dec 4 2019 Aloft: Animations of WV imagery and RAP tropopause analyses indicate low-amplitude WNW flow over the Cntrl Plns. That will remain the case thru tomorrow. The potent low currently over CA will move inland and rapidly weaken. The remnant trof will still spread substantial cloud cover over the rgn tomorrow. Surface: 1020 mb high pres was over the Srn Plns. Wk 1004 mb low pres was over Srn AB. The high will move E to the Gulf Coast states tonight while the low weakens and advances into ND. This low will weaken further tomorrow with its trailing weak cool front crossing the CWA. 1028 mb high pres will quickly drop out of Canada into the Nrn Plns Thu aftn and begin building in. Rest of this afternoon: Partly cldy. Temps a little warmer than yesterday with highs ranging from upr 40s N to upr 50s S. Tonight: Clearing. Temps will fall below frzg but still be svrl degs abv normal. Good radiation conds with nearly calm winds. Thu: Bcmg mostly cldy. Not as warm as an extensive thick cirrostratus cloud shield moves over the rgn ahead associated with a weakening shrtwv trof. Any lgt rain will remain SW-S of the CWA. This will keep temps down a little bit..but they will still be a few degs abv normal. .LONG TERM...(Thursday night through Wednesday) Issued at 112 PM CST Wed Dec 4 2019 Aloft: The past 2 runs of the GFS-FV3/EC/UKMET/CMC cont in very good agreement on amplification of the longwaves beginning Sun. WNW flow will cont over NEB/KS Fri...but a deamplifying Wrn USA ridge will move E and cross the rgn Sat. A deep trof will move into the NE Pac inducing downstream amplification...forcing a ridge to build from the W coast up to Yukon...with a trof temporarily deepening over the Plns Sun-Mon. This trof will then shift into the Ern USA Tue-Wed and deamplify. Surface: Fairly strong high pres over the Cntrl Plns Fri will quickly depart with downslope-warmed return flow Sat-Sun until a strong cold front slams thru here Mon AM. A reinforcing shot of cold air will move in Mon night or Tue (the Arctic front). High pres will follow behind. Temps: Colder than normal Fri. Warmer than normal Sat-Sun. Back to colder than normal Mon-Wed...possibly much colder than normal...but there is mdl disagreement on if the Arctic air plunges in here full-bore or if we get brushed by its SW edge. The 06Z/12Z GFS runs are much sharper with the upr trof. The 00Z/12Z EC runs are much broader. That will make all the diff between a direct discharge of Arctic air or it mostly misses to the N and E of the rgn. Until this diff is resolved...there is uncertainty on how cold temps will be Mon-Tue. Precip: Essentially dry. There is a slight chance that there could be some flurries or lgt snow shwrs in CAA Mon. Wind: MOS wind speeds were loaded on Sat and Mon to incrs winds above NBM. Also boosted gusts a bit abv the algorithm output for both periods. && .AVIATION...(For the 00Z KGRI/KEAR TAFS through 00Z Thursday) Issued at 554 PM CST Wed Dec 4 2019 VFR conditions are forecast. Wind will turn to the northwest behind a cold front Thursday afternoon with wind speeds picking up a bit late in the forecast. && .GID WATCHES/WARNINGS/ADVISORIES... NE...None. KS...None. && $$ SHORT TERM...Kelley LONG TERM...Kelley AVIATION...Heinlein
National Weather Service Wilmington OH
935 PM EST Wed Dec 4 2019 .SYNOPSIS... Clouds return late this afternoon and evening along with the chance for sprinkles and flurries. High pressure will briefly build in Thursday before a slight chance of showers arrives again early Friday near and south of the Ohio River. Drier and seasonable conditions are expected this weekend until late Sunday into early next week before the next system arrives. && .NEAR TERM /THROUGH THURSDAY/... 850mb temperatures over ILN dropped about 3 degrees C from the 12Z sounding to the 00Z sounding, steepening low level lapse rates and leading to increases in both cloud cover and wind gusts this evening. The gusty winds (20-30 knots) should persist for another couple hours, but the increasing stratocumulus clouds will stick around for a bit longer, and should actually continue to increase through at least 06Z. There are definitely going to be some breaks, as upstream satellite depictions would suggest, but in general conditions will be more and more cloudy with northeastward extent through the ILN CWA tonight. It is interesting that despite the clouds and wind, both the NAM and RAP are fairly insistent on some significant drops in temperature tonight -- which does not seem totally realistic. The HRRR appears fairly close to the previous forecast, which was left unchanged. Finally, a couple bands of showers have been moving through the eastern ILN CWA, with no real impacts expected. These should be out of the forecast area by 05Z. Previous discussion > While abundant sunshine has made an appearance for much of the day today, an upper level disturbance and an increase in low level moisture results in another wave of clouds late this afternoon and evening. Visible satellite imagery already shows clouds increasing across parts of northwest Ohio. These will continue to move southward over the next few hours. The upper level disturbance does enhance vertical motion this evening, however, dry mid- level air prevents the possibility of widespread precipitation. Instead, low level lift supports slight chances for scattered rain/snow showers, primarily across northeast areas. In fact, looking at forecast soundings, this forecast remains in agreement with previous forecasts that much of the hydrometeors may fall as drizzle/flurries as saturation fails to reach the DGZ zone. Highs today have approached forecast temps with observations topping out in the mid to upper 40s (SW) and the upper 30s and lower 40s (NE). West- northwesterly winds have gusted over 30 mph at times this afternoon with winds expected to remain gusty into the evening before subsiding after midnight. Low level clouds persist late this evening, but temperatures are still expected to drop into the upper 20s and lower 30s by sunrise. && .SHORT TERM /THURSDAY NIGHT/... Low level clouds linger the longest after sunrise across northeast areas as dry low level air associated with a building ridge gradually shifts eastward. Surface high pressure passes to the south for much of the day, providing partly cloudy skies and seasonable temperatures in the mid to upper 40s. Low level clouds decreasing during the morning but, upper level clouds are on the increase throughout the day as the next upper level trough moves into the central plains. Overnight, a cold front approaches from the northwest with the best chance of precipitation arriving toward sunrise across the southwest, near and south of the Ohio River. && .LONG TERM /FRIDAY THROUGH WEDNESDAY/... The long term period will start off with the passage of a cold front through the Ohio Valley on Friday under northwest flow aloft. The frontal passage is expected to be accompanied by limited precipitation chances since the best forcing associated with two short waves embedded within the northwest flow aloft will be north and south of the area. However, the best chances for precipitation across our local area will be near and south of the Ohio River where the highest PWAT values will be located. After the frontal passage, high pressure will build in from the northwest on Friday night/early Saturday morning. With the high pressure system centered over the Ohio Valley, highs on Saturday are expected to be in the lower 40s across central Ohio/Indiana and mid 40s near the Ohio River (below normal) under mostly clear skies. Fair weather and cool conditions will prevail Saturday night with lows in the lower 30s across the area. By Sunday, the high pressure system responsible for the tranquil weather on Saturday will be off to the east and southwesterly flow will move in on the western side of the high. WAA will aid in temperatures rebounding into the 50s on Sunday as moisture increases thereby setting the stage for our next widespread precipitation event. Precipitation chances start to increase Sunday evening/night in the WAA advection regime ahead of the next cold front. Precipitation chances will continue to increase into Monday and Tuesday as a shortwave diving into the northern Great Plains the will lead to cyclone development to our west. The shortwave and cold front associated with the surface cyclone (forcing for widespread precipitation) will push through the region on Tuesday, but the exact timing is uncertain at this time. Thus, the high temperatures on Tuesday have uncertainty since an early cold frontal passage will lead to cooler highs than currently forecast. Regardless of the time of day, temperatures will drop behind the front and rain showers will transition to snow showers as colder air moves in. A cold high pressure system will then build in out of Canada and bring below average temperatures for the middle of next week. && .AVIATION /03Z THURSDAY THROUGH MONDAY/... VFR conditions are beginning the TAF period this evening, but stratocumulus clouds are beginning to move into the area from the north. This is expected to lead to MVFR ceilings at KCMH/KLCK, with perhaps some temporary MVFR ceilings at KILN/KDAY. KCVG/KLUK should remain south of the thickest clouds, with generally VFR conditions expected. Some light precipitation is also possible in the Columbus area in the next few hours, but without any additional impact to aviation. While WNW winds remain somewhat gusty, this should subside by 06Z. Tomorrow morning, any remaining MVFR clouds should clear east of Columbus, with VFR conditions expected for the rest of the TAF period. Very light winds will eventually shift from the west to the south, as high clouds begin to move into the area tomorrow afternoon. OUTLOOK...MVFR conditions are expected on Friday. MVFR conditions are possible again Sunday night into Monday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && $$ SYNOPSIS...McGinnis NEAR TERM...Hatzos/McGinnis SHORT TERM...McGinnis LONG TERM...Campbell AVIATION...Hatzos
Area Forecast Discussion
National Weather Service North Platte NE
528 PM CST Wed Dec 4 2019 .SHORT TERM...(This evening through Thursday night) Issued at 317 PM CST Wed Dec 4 2019 High pressure systems across nwrn Canada and Pacific off the coast of British Columbia will fuse across the nrn Plains and move through wrn and ncntl Nebraska Thursday and Thursday night. The NAM and to a lesser extent the GFS, SREF and 36 hr run of the RAP suggest the potential for stratus, areas of fog and patchy freezing drizzle Thursday night. The short term model blend and the SREF were the basis for the fog and freezing drizzle forecast Thursday night. Confidence in the stratus is high, the fog is moderate and the freezing drizzle low to moderate. The freezing drizzle forecast is somewhat uncertain as it relies heavily on the NAM model and is outside the range of the RAP and HRRR models which will support or contradict the NAM as the event time draws closer. The temperature forecast tonight through Thursday night uses the guidance blend plus bias correction. High temperatures Thursday were marked down across northern Nebraska where snow cover is widespread. No adjustment was needed across srn Nebraska. .LONG TERM...(Friday through Wednesday) Issued at 317 PM CST Wed Dec 4 2019 Two strong arctic high pressure systems will come down in rapid succession from northern Canada. The first arriving Sunday followed by a second Wednesday. This will likely keep wrn and ncntl Nebraska below average in temperature and precipitation. The upper level flow is highly amplified up into Alaska and then south through wrn Canada. Any energy in the flow appears to be passing south through the srn Rockies and Midsouth. It is too early and uncertain exactly what sensible weather, such as the potential for freezing drizzle, will accompany the cold air across Nebraska. The coldest air will move mostly through the upper Midwest. This setup might favor a period of freezing drizzle somewhere across Nebraska. Today`s model blended forecast is drier favoring points across the SD and MN for light snow. Sporadic slight chances of snow are in place across nrn Nebraska Sunday night through Monday night. The first arctic high will likely flush most of the moisture out of Nebraska and a dry forecast is in place Tuesday and Wednesday. && .AVIATION...(For the 00Z TAFS through 00Z Thursday evening) Issued at 520 PM CST Wed Dec 4 2019 VFR conditions will continue for most of the forecast period with the exception of the northern Sandhills late Thursday afternoon. Lower cloud ceilings will move into the area bringing MVFR conditions. There is also a possibility of some patchy fog developing across the northern Sandhills tomorrow, but at this time it looks to be in the evening, outside of the forecast period. && .HYDROLOGY... Issued at 317 PM CST Wed Dec 4 2019 A river flood warning continues for the North Platte river near Lewellen with the river gage and NDOT cameras suggesting minor flooding. Warm temperatures this week may cause the ice jam to break up, perhaps on Thursday. && .LBF WATCHES/WARNINGS/ADVISORIES... None. && $$ SHORT TERM...CDC LONG TERM...CDC AVIATION...Gomez HYDROLOGY...CDC