Severe Thunderstorm Warning 21, NWS Riverton, WY

017 
WWUS55 KRIW 012131
SVSRIW

Severe Weather Statement
National Weather Service Riverton WY
331 PM MDT Mon Jul 1 2019

WYC003-029-012145-
/O.CON.KRIW.SV.W.0021.000000T0000Z-190701T2145Z/
Big Horn-Park-
331 PM MDT Mon Jul 1 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM MDT
FOR NORTHWESTERN BIG HORN AND NORTHEASTERN PARK COUNTIES...

At 329 PM MDT, a severe thunderstorm was located near Garland, which
is 7 miles northeast of Powell, moving east at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe storm will be near...
  Deaver around 335 PM MDT.
  Cowley and Byron around 345 PM MDT.

Other locations impacted by this severe thunderstorm include Cowley
North Big Horn County Airport and Powell Municipal Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Riverton.

&&

LAT...LON 4483 10895 4496 10880 4497 10838 4464 10840
TIME...MOT...LOC 2129Z 274DEG 15KT 4483 10865 

HAIL...1.00IN
WIND...60MPH
 
$$

Hulme

602 
WWUS55 KRIW 012138
SVSRIW

Severe Weather Statement
National Weather Service Riverton WY
338 PM MDT Mon Jul 1 2019

WYC003-029-012148-
/O.EXP.KRIW.SV.W.0021.000000T0000Z-190701T2145Z/
Big Horn-Park-
338 PM MDT Mon Jul 1 2019

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BIG HORN AND
NORTHEASTERN PARK COUNTIES WILL EXPIRE AT 345 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

LAT...LON 4483 10895 4496 10880 4497 10838 4464 10840
TIME...MOT...LOC 2138Z 274DEG 15KT 4483 10864 

$$

Hulme

Area Forecast Discussion
National Weather Service Riverton WY
1201 PM MDT Mon Jul 1 2019

.SHORT TERM...Today and tonight

Clearing skies are quickly spreading eastward this morning. Low
clouds have also developed over portions of Natrona County. Fog
will become a possibility in this and other areas where
precipitation fell Sunday. The unseasonably high dewpoints will
also aid in this formation. Otherwise, skies will become clear
across the area late this morning. This will allow for isolated to
scattered showers to develop over the northwestern mountains,
spreading eastward across mainly northern portions through the
afternoon. An isolated embedded thunderstorm will be possible
during this time. These showers will end by sunset this evening.
Winds will also be light across much of the area today, with gusty
winds up to 25 mph occurring in the higher elevations of the
western mountains.

.LONG TERM...Tuesday through Sunday

Several shortwaves embedded within the near-zonal flow this week
will bring continued chances of showers and thunderstorms during the
afternoons. The best coverage still looks to be northern Wyoming and
over higher elevations, with southern Wyoming staying mostly dry
through the period. This will not help mitigate fire concerns across
southern Wyoming, as elevated fire conditions could return across
those areas by midweek as RHs drop back into the teens. Afternoon
temperatures will remain warm throughout the week. By Friday models
suggest that the low sitting to our northwest will finally lift
across Montana. Gusty winds are likely towards the end of the week
as the pressure gradient tightens in response to the lifting low. By
the weekend temperatures should warm slightly as stronger ridging
sets in.

&&

.AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon)
Issued at 1154 AM MDT Mon Jul 1 2019

Afternoon thunderstorms are beginning to fire on the higher
elevations of the Absarokas and the Wyoming range. Expect these
storms to moves east during the afternoon, and will likely
approach most airports east of the divide. Some storms may produce
variably gusty winds through the afternoon. Storms will decrease
after sunset, with mostly clear skies and lighter winds overnight.

&&

.FIRE WEATHER...

Isolated to scattered showers will develop over the western
mountains this afternoon, spreading eastward across the northern
zones. Isolated thunderstorms will also be possible. This activity
will end before sunset this evening. Otherwise, winds will be
light with gusts up to 25 mph occurring in the higher elevations
of the western zones.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...LaVoie
LONG TERM...Myers
AVIATION...Straub
FIRE WEATHER...LaVoie

Hazardous Weather Outlook
National Weather Service Riverton WY
302 AM MDT Mon Jul 1 2019

WYZ001>020-022>030-020915-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn Basin-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-
Northeast Johnson County-Southeast Johnson County-
Teton and Gros Ventre Mountains-Jackson Hole-
Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
302 AM MDT Mon Jul 1 2019

This Hazardous Weather Outlook is for Western and Central
Wyoming.

.DAY ONE...Today and Tonight.

Isolated to scattered thunderstorms over northern and northwestern
portions.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday through Thursday...Afternoon and evening thunderstorms,
especially across the northern and northwestern portions. It will
be driest across southwest Wyoming.

Tuesday through Thursday...Elevated fire conditions possible over
southern Wyoming.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
150 PM MDT MON JUL 1 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0149 PM     HAIL             THERMOPOLIS             43.65N 108.21W
07/01/2019  E2.00 INCH       HOT SPRINGS        WY   PARK/FOREST SRVC

            2 INCH HAIL REPORTED AT HOT SPRINGS STATE PARK.

&&

CJONES

Special Weather Statement
National Weather Service Riverton WY
151 PM MDT Mon Jul 1 2019

WYZ014-025-012015-
Wind River Mountains West-Upper Green River Basin Foothills-
151 PM MDT Mon Jul 1 2019

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SUBLETTE COUNTY UNTIL 215
PM MDT...

At 151 PM MDT, Doppler radar was tracking a strong thunderstorm over
Pinedale, moving east at 20 mph.

Nickel size hail and winds in excess of 30 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Half Moon Lake around 210 PM MDT.
  Boulder Lake around 215 PM MDT.

Other locations impacted by this storm include Boulder Lake
Campground and Fremont Lake Campground.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If on or near Fremont Lake or Half Moon Lake, get out of the water
and move indoors or inside a vehicle. Remember, lightning can strike
out to 10 miles from the parent thunderstorm. If you can hear
thunder, you are close enough to be struck by lightning. Move to
safe shelter now! Do not be caught on the water in a thunderstorm.

Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.

&&

LAT...LON 4282 10990 4295 10992 4301 10963 4278 10961
TIME...MOT...LOC 1951Z 269DEG 18KT 4288 10986

McDonald

Special Weather Statement
National Weather Service Riverton WY
201 PM MDT Mon Jul 1 2019

WYZ026-012030-
Upper Green River Basin-
201 PM MDT Mon Jul 1 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL SUBLETTE COUNTY
UNTIL 230 PM MDT...

At 201 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Marbleton, which is 7 miles east of Big Piney,
moving east at 15 mph.

Half inch hail and winds in excess of 30 mph will be possible with
this storm.

This storm will remain over mainly rural areas of south central
Sublette County.

LAT...LON 4241 11006 4259 11007 4263 10971 4239 10969
TIME...MOT...LOC 2001Z 266DEG 11KT 4251 10997

Straub

Special Weather Statement
National Weather Service Riverton WY
203 PM MDT Mon Jul 1 2019

WYZ016-017-012030-
Wind River Basin-Upper Wind River Basin-
203 PM MDT Mon Jul 1 2019

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL FREMONT COUNTY UNTIL 230
PM MDT...

At 203 PM MDT, Doppler radar was tracking a strong thunderstorm near
Bull Lake, which is 18 miles northwest of Fort Washakie, moving east
at 20 mph.

Half inch hail and winds in excess of 30 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Bull Lake around 210 PM MDT.
  Diversion Dam Rest Area around 220 PM MDT.

LAT...LON 4317 10923 4319 10920 4319 10917 4323 10919
      4321 10919 4321 10921 4322 10921 4334 10918
      4332 10877 4306 10884 4315 10917 4316 10919
      4316 10923
TIME...MOT...LOC 2003Z 281DEG 15KT 4324 10911

Straub

Special Weather Statement
National Weather Service Riverton WY
212 PM MDT Mon Jul 1 2019

WYZ011-020-012045-
Southeast Johnson County-Natrona County Lower Elevations-
212 PM MDT Mon Jul 1 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN JOHNSON AND
NORTHEASTERN NATRONA COUNTIES UNTIL 245 PM MDT...

At 212 PM MDT, Doppler radar was tracking a strong thunderstorm 10
miles southeast of Linch, which is 31 miles southwest of Wright,
moving east at 20 mph.

Nickel size hail and winds in excess of 30 mph will be possible with
this storm.

This storm will remain over mainly rural areas of southeastern
Johnson and northeastern Natrona Counties.

This includes Interstate 25 between mile markers 228 and 232.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4349 10608 4338 10607 4342 10644 4351 10640
      4360 10616 4360 10602 4350 10602
TIME...MOT...LOC 2012Z 278DEG 19KT 4351 10603

Hulme

Special Weather Statement
National Weather Service Riverton WY
249 PM MDT Mon Jul 1 2019

WYZ006-008-009-012115-
Southeast Big Horn Basin-Bighorn Mountains Southeast-Bighorn
Mountains West-
249 PM MDT Mon Jul 1 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN JOHNSON AND EAST
CENTRAL WASHAKIE COUNTIES UNTIL 315 PM MDT...

At 249 PM MDT, Doppler radar was tracking a strong thunderstorm near
Big Trails, which is 16 miles south of Ten Sleep, moving east at 15
mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

This strong thunderstorm will be near...
  Big Trails around 305 PM MDT.

LAT...LON 4377 10753 4387 10751 4390 10699 4363 10703
TIME...MOT...LOC 2049Z 275DEG 15KT 4380 10740

Hulme