Forecast Discussions mentioning any of "HRRR" "RAP" "RUC13" "RUC" "RR" received at GSD on 12/04/19

Area Forecast Discussion

National Weather Service Hastings NE

 530 PM CST Tue Dec 3 2019

.SHORT TERM...(This evening through Wednesday)
Issued at 123 PM CST Tue Dec 3 2019

Aloft: RAP tropopause analyses and WV imagery showed low-
amplitude NW flow over the Cntrl Plns. A ridge was over the Wrn
USA and a shrtwv trof was over the upr Midwest heading into the
GtLks. This low-amplitude flow will remain thru tomorrow with
winds backing to WNW.

Surface: Wk high pres was over CO. This high will slide SE into
the Srn Plns thru tomorrow...with the ridge axis crossing the CWA
around midday.

Now thru sunset: incrsd high temp a bit mainly S and E of the
snow pack. Highs will range from the mid 40s NW to upr 50s
SE...and will occur around 3 PM.

Tonight: Clear. Lows 27-31F...about 10F above normal. Lgt W
winds.

Wed: Sunny to start...but incrsg cirrostratus from the S will
turn skies partly to mostly cldy...cloudiest S of Hwy 6. Highs
should be 2-3F warmer than today where skies remain sunniest (N of
Hwy 6).

.LONG TERM...(Wednesday night through Tuesday)
Issued at 123 PM CST Tue Dec 3 2019

Aloft: The past 2 runs of global mdls (GFS-FV3/EC/CMC/UKMET) are
tightly-clustered on low-amplitude WNW flow cont Thu-Fri. The Wrn
USA ridge will move E and cross NEB/KS Sat...shifting the flow to
W or WSW Sun-Tue. Significant amplification of the longwaves is
fcst due to a deep trof advancing into the NE Pac. This will force
a ridge to build from the W coast into Yukon. Height will then
fall over the Plns as Arctic air unloads. Mdl agreement is very
good...providing high confidence.

Surface: A wk cool front will cross the CWA Thu. A stronger cold
front is fcst to move thru Mon morning...and will be followed by
the Arctic front plunging thru Tue night...with a 1040+ mb high
dropping out of Canada.

Temps: Near normal Thu. A brief cooldown Fri. Warmer than normal
Sat-Sun...and our fcst may not be warm enough. Mon-Tue turning
colder than normal.

Precip: Mostly dry. Nothing significant. There could be a little
patchy light snow/rain with the front Mon. If anything occurs...it
won`t amt to much.

&&

.AVIATION...(For the 00Z KGRI/KEAR TAFS through 00Z Wednesday)
Issued at 529 PM CST Tue Dec 3 2019

A few cirrus will move through the area. A weak high pressure
system settles into the area and light winds are expected.

&&

.GID WATCHES/WARNINGS/ADVISORIES...
NE...None.
KS...None.
&&

$$

SHORT TERM...Kelley
LONG TERM...Kelley
AVIATION...JCB