Special Weather Statement, NWS North Platte, NE

Area Forecast Discussion
National Weather Service North Platte NE
404 PM CDT Fri Jul 23 2021

.SHORT TERM...(This evening through Saturday night)
Issued at 403 PM CDT Fri Jul 23 2021

A weak shortwave is in the process of moving into the western
Dakotas this afternoon. A training weak cold front is analyzed from
near Pine Ridge to Alliance to Sidney. Temperatures aloft have
cooled a couple of degrees today which has helped to weaken the
capping inversion. As a result a few elevated showers and
thunderstorms have been occurring  in area of mid-level warm air
advection on the southeast side of the shortwave across northwest
Nebraska. This area of mid-level WAA will sag southeast across the
area tonight, with a continued threat of a few showers and
thunderstorms. There may be a bit of an uptick across southern SD
and far northern NE early to mid evening as better ascent
overspreads the area as the shortwave moves across. For the most
part it appears the severe threat is very low, but some threat for
gusty winds will exist especially if a small cluster can grow
upscale across southern SD and far northern NE.

The weak cold front will continue southeast overnight and be located
across northern KS by Saturday afternoon. Weak CAA will filter
across the area, and highs should generally hold in the lower to mid
90s (still hot). Somewhat drier air will filter into northern NE
where humidity values will be comfortable as dew points lower into
the 50s. Across central and southwest NE it will remain rather
sticky as dew points pool in the mid to upper 60s just north of the
frontal boundary.

.LONG TERM...(Sunday through Friday)
Issued at 403 PM CDT Fri Jul 23 2021

Sunday the front lifts northward as a warm front. Models have
struggled with any possible convection as the front lifts back to
the north. The latest runs of the NAM and NAMnest would suggest
little if any chance for organized precipitation and any would be
spotty at best. We will keep some low end chance pops going at this
point but may have to lower if the drier model trends continue.
Monday and beyond the upper ridging builds into the Western High
Plains and eventually the Central Plains. Very warm temperatures
aloft will accompany this with little or no chance for precipitation
and continued hot temperatures. Highs both Tuesday and Wednesday
could be near or exceed 100F.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 100 PM CDT Fri Jul 23 2021

A weak wind shift boundary will drop slowly southward through
tonight across the area and provide focus for thunderstorms this
afternoon into tonight. At this time, greatest confidence for
impacts is at VTN but expected coverage to remain isolated and
will cover with VCTS for now. Potential exists for MVFR CIGs and
possibly visibilities should direct impacts occur. Activity should
remain north of LBF before decreasing in coverage and intensity
by late evening. Will leave mention out for now at KLBF, but
potential will need to be monitored for possible inclusion in
later forecasts.

&&

.LBF WATCHES/WARNINGS/ADVISORIES...
None.
&&

SHORT TERM...Taylor
LONG TERM...Taylor
AVIATION...Roberg

Hazardous Weather Outlook
National Weather Service North Platte NE
354 PM CDT Fri Jul 23 2021

NEZ004>010-022>029-035>038-056>059-069>071-094-242100-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-
Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-
Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
354 PM CDT Fri Jul 23 2021 /254 PM MDT Fri Jul 23 2021/

This Hazardous Weather Outlook is for portions of western and
north central Nebraska.

.DAY ONE...TONIGHT.

Isolated thunderstorms will be possible this evening mainly
across the eastern panhandle into north central Nebraska. A few
storms may become strong with strong wind gusts the main concern.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

Isolated thunderstorms will be possible Saturday and Sunday. At
this time, the threat for widespread severe weather is low.

After a reprieve Sunday, hot conditions will redevelop next week
with heat index values forecast to approach or exceed 100 degrees
each day Monday through Thursday.

.SPOTTER INFORMATION STATEMENT...

Please relay any information about observed severe weather to the
NWS.

&&

Get your weather, hydrological, and climate information at
http://www.weather.gov/northplatte

Special Weather Statement
National Weather Service North Platte NE
411 PM MDT Fri Jul 23 2021

NEZ023-035-232300-
Grant NE-Arthur NE-
411 PM MDT Fri Jul 23 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN ARTHUR AND SOUTHEASTERN
GRANT COUNTIES UNTIL 500 PM MDT...

At 410 PM MDT, Doppler radar was tracking a strong thunderstorm 10
miles northwest of Arthur, moving east at 20 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Lena, Sand Puddin Lake, Velma, Jensen Lake, Green Lake and Cogill
Lake.

LAT...LON 4160 10189 4178 10189 4183 10150 4156 10150
TIME...MOT...LOC 2210Z 269DEG 10KT 4170 10179

Gomez

Special Weather Statement
National Weather Service North Platte NE
414 PM MDT Fri Jul 23 2021

NEZ022-035-056>058-232300-
Deuel NE-Arthur NE-Garden NE-Perkins NE-Keith NE-
414 PM MDT Fri Jul 23 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN ARTHUR...NORTHERN
PERKINS...WESTERN KEITH...SOUTHEASTERN GARDEN AND EASTERN DEUEL
COUNTIES UNTIL 500 PM MDT...

At 413 PM MDT, Doppler radar was tracking a strong thunderstorm near
Barton, or near Big Springs, moving east at 20 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Big Springs, Brule, Barton, Eagle Gulch Campground, Ruthon, Clear
Creek State Wildlife Management Area, Megeath, Otter Creek
Campground, Lake View Campground, Ash Hollow State Historical Park,
Belmar, Goldeneye State Wildlife Management Area and Windlass Hill.

LAT...LON 4140 10181 4095 10180 4100 10205 4101 10205
      4100 10208 4104 10228 4125 10230
TIME...MOT...LOC 2213Z 269DEG 10KT 4112 10217

Gomez