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Risks of Severe Thunderstorms and Excessive Rainfall in the Central U.S.; Fire Weather Concerns in Alaska and Southwest

An expansive storm system will bring widespread storms with a threat for flash flooding and severe weather to much of the central to eastern U.S. into early this week. Critical fire weather conditions are expected across interior Alaska this weekend. Elevated fire conditions also expected in the Southwest U.S.. Conditions will remain uncomfortably hot across the southern Plains and the Southeast. Read More >

Summary | Forecast | Observed Snow and Wind | Travel Center | Monitoring & Reporting | Safety


SYNOPSIS:


A strong cold front will move across the area today.  Snow, blowing and drifting snow will cause hazardous travel conditions across the west through the afternoon. Winter Storm Warnings and Winter Weather Advisories are in effect for far western portions until 5 pm. Snowfall amounts of 6 to 10 inches for the mountains, with local amounts of 9 to 15 inches in the Tetons. Lower elevations in the far west will see 4 to 5 inches. Other areas of the state south may see a dusting of snow up to a couple of inches.

Strong winds will also accompany the system in the western mountains, , I-80 and the southern wind corridor and northern I-25 corridor. High Wind Warnings are in effect for portions of Fremont, Natrona and Johnson Counties today where wind gusts over 60 mph are expected. Strong northwest wind will continue across the Wind River Basin and northeast Johnson County through this evening. 

IMPACTS:

  • Western mountain and valley roads will be slick and hazardous due to falling snow and windy conditions.
  • Strong to High Winds will create hazardous driving conditions and areas of blowing snow.
    • Southeast Fremont and Natrona counties will see High Wind gusts to 60 mph into this afternoon.
    • Interstate 80 could see strong winds up to 50 mph today.
    • The Wind River Basin and northeast Johnson County could see northwest winds gusting near 60  mph this afternoon and evening.

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NWS Text Products and Forecasts

  Area Forecast Discussion
  Winter Weather Statement
  Special Weather Statement
  What's a "Watch?"
  Observed Snow Totals or High Wind
 High Wind Statement
 Weather Story

Quick View of Hazards, Simulated Radar Imagery, and Forecast Snow Totals (created at 6 AM 12/12)
Click Images To Enlarge
Click to enlarge


 Winter Storm Warnings and Winter Weather Advisories are in effect until 5 pm Wednesday 

High Wind Warnings are in effect for southeast Fremont and Natrona Counties until 2 PM Wednesday

High Wind Warnings are in effect for the Wind River Basin and Northeast Johnson County from noon today until midnight Wednesday night.

Click to enlarge   Click to enlarge  

Current Radar Loop
Click Images To Enlarge

Radar simulation of timing of snow beginning
at 5 AM Wednesday until 8 PM Wednesday night. The
darker blue shades represent heavier snow.

 

 



Snow and Wind Forecasts for Wednesday
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Forecast Snowfall on Wednesday

Wednesday's Peak Wind Gusts

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Snow Totals and Wind Reports will be posted and updated here once the storm occurs
(Please double check date and time of product)

                        
771
NOUS45 KRIW 210258
PNSRIW
WYZ001>020-022>030-211447-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
847 PM MDT SAT JUN 20 2026

...EVENT SUMMARY...

SEVERAL ROUNDS OF SEVERE THUNDERSTORMS MARCHED THEIR WAY ACROSS
WESTERN AND CENTRAL WYOMING THANKS TO TWO AREAS OF LOW PRESSURE THAT
MOVED THROUGH THE REGION TODAY. THE WEATHER CONDITIONS WERE VERY
FAVORABLE FOR STRONG WIND GUSTS, WHICH IS EXACTLY WHAT HAPPENED. IN
ADDITION TO THIS, THERE WAS A LANDSPOUT TORNADO REPORTED BETWEEN BIG
PINEY/MARBLETON AND PINEDALE EARLY SATURDAY AFTERNOON. EVEN MORE
IMPRESSIVE WAS A WIND GUST OF 81 MPH AT CASPER AIRPORT. IN RIVERTON
A BRIEF HABOOB (DUST STORM CREATED BY THUNDERSTORM WIND) WAS
REPORTED WITH THE STRONG WIND.


...HIGHEST WIND REPORTS...

LOCATION                     SPEED     TIME/DATE       ELEVATION (FT.)

...WYOMING...

...FREMONT COUNTY...
WY28 RED CANYON (DOT)        81 MPH    0356 PM 06/20   6581
RIVERTON AIRPORT (ASOS)      67 MPH    0214 PM 06/20   5443
POSTON RANCH RD (PC)         67 MPH    0250 PM 06/20   5749
LANDER AIRPORT (ASOS)        66 MPH    0321 PM 06/20   5587
PAVILLION (CWOP)             58 MPH    0200 PM 06/20   5485
RIVERTON 3 (CWOP)            56 MPH    0210 PM 06/20   5390
WYOPO (PC)                   55 MPH    0200 PM 06/20   5471
JEFFREY CITY (CWOP)          55 MPH    0200 PM 06/20   6442
COPPER MTN RD (PC)           55 MPH    0240 PM 06/20   6355
DICKINSON (PC)               55 MPH    0340 PM 06/20   7490

...HOT SPRINGS COUNTY...
STAGNER (PC)                 71 MPH    0220 PM 06/20   7053
BOYSEN PEAK (AWOS)           70 MPH    0235 PM 06/20   7099
HOT SPRINGS AIRPORT (AWOS)   60 MPH    0235 PM 06/20   4903

...JOHNSON COUNTY...
1 SE SUSSEX                  67 MPH    0425 PM 06/20
15 NNE MAYOWORTH             59 MPH    0500 PM 06/20
13 WNW MIDWEST               58 MPH    0400 PM 06/20
TISDALE MTN (PC)             57 MPH    0430 PM 06/20   5557
I-25 TISDALE DIVIDE (DOT)    57 MPH    0452 PM 06/20   4990

...LINCOLN COUNTY...
MOUNT COFFIN (BTAC)          83 MPH    0615 PM 06/20   10855
NUGGET CANYON (PC)           71 MPH    0610 PM 06/20   7621
SAGE JUNCTION 3 E (UPR)      63 MPH    0609 PM 06/20   6377
US30 NUGGET CANYON (DOT)     60 MPH    0616 PM 06/20   6626
US30 SAGE JUNCTION (DOT)     56 MPH    0616 PM 06/20   6414

...NATRONA COUNTY...
CASPER AIRPORT (ASOS)        81 MPH    0341 PM 06/20   5348
I-25 TWENTY MILE HILL (DOT)  79 MPH    0406 PM 06/20   5656
SCENIC DR (PC)               72 MPH    0350 PM 06/20   5827
US20 NATRONA (DOT)           64 MPH    0322 PM 06/20   5594
HORSE RANCH CREEK (PC)       59 MPH    0350 PM 06/20   5341
I-25 HAT SIX (DOT)           58 MPH    0416 PM 06/20   5157
CLAUDE CREEK (PC)            57 MPH    0350 PM 06/20   6282
CASPER (CWOP)                56 MPH    0345 PM 06/20   5341

...PARK COUNTY...
CRANDALL                     55 MPH    0712 PM 06/20   6640

...SUBLETTE COUNTY...
BIG PINEY AIRPORT (ASOS)     70 MPH    0653 PM 06/20   6946
HALF MOON LAKE (PC)          68 MPH    1220 PM 06/20   7857
COTTONWOOD MERNA (PC)        63 MPH    0640 PM 06/20   7830
PINEDALE AIRPORT (AWOS)      59 MPH    0655 PM 06/20   7105
RIVERSIDE (PC)               56 MPH    0720 PM 06/20   7397
HOGSBACK (PC)                55 MPH    0640 PM 06/20   9008

...SWEETWATER COUNTY...
I-80 BAXTER RD (DOT)         70 MPH    0742 PM 06/20   6345
ROCK SPRINGS AIRPORT (ASOS)  66 MPH    0754 PM 06/20   6759
WY372 SHUTE CREEK (DOT)      64 MPH    0706 PM 06/20   6496
ROCK SPRINGS 6 WSW (UPR)     60 MPH    0723 PM 06/20   6213
US191 FARSON (DOT)           60 MPH    0726 PM 06/20   6598
ROCK SPRINGS (PC)            56 MPH    0730 PM 06/20   6241
I-80 BITTER CREEK (DOT)      56 MPH    0816 PM 06/20   7133

...TETON COUNTY...
SURPRISE PINNACLE (BTAC)     83 MPH    0200 PM 06/20   9770

...WASHAKIE COUNTY...
PISTOL DRAW                  72 MPH    0317 PM 06/20   4520
HIDDEN DOME (PC)             65 MPH    0340 PM 06/20   4816
WORLAND AIRPORT (ASOS)       56 MPH    0316 PM 06/20   4226

OBSERVATIONS ARE COLLECTED FROM A VARIETY OF SOURCES WITH VARYING
EQUIPMENT AND EXPOSURES. WE THANK ALL VOLUNTEER WEATHER OBSERVERS
FOR THEIR DEDICATION. NOT ALL DATA LISTED ARE CONSIDERED OFFICIAL.

$$



                

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 Road Conditions and Web Cameras
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Teton Pass - Hwy 22
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Jackson
Bondurant - U.S. Hwy 189
Togwotee Pass - U.S. Hwy 26
Dubois
Granite Pass - U.S. Hwy 14
Powder River Pass - U.S. Hwy 16
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Salt River Pass
Buffalo - I-25/I-90 Interchange
Casper Mountain
I-80 - Little America
Beaver Rim - U.S. Hwy 287
I-80 - Rock Springs
I-80  - Laramie


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If you plan to travel, we recommend checking road conditions along your route and staying on top of road closures here. If you are on Twitter, follow the hashtag: #WyoRoad (or look below) for the latest weather affecting roads and road conditions in and around Wyoming. 

 

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