An upper level disturbance moved across Wyoming ahead of a broad trough across the Pacific Northwest and Great Basin. As the disturbance tracked northeast it helped to trigger thunderstorms over mainly western and northern portions of the state.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS RIW wrote it up.
An upper level disturbance moved across Wyoming ahead of a broad trough across the Pacific Northwest and Great Basin. As the disturbance tracked northeast it helped to trigger thunderstorms over mainly western and northern portions of the state. The main hazard was hail with at least a few reports of one inch diameter stones. In Sublette County, a tornado touched down briefly on Dollar Lake near Green River Lakes before it lifted.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Riverton, WY wrote its last area forecast discussion before the first event at May 31, 10:11 AM MST, 2 hours 23 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RIVERTON WY 1111 AM MDT SAT MAY 31 2014 ...UPDATE FOR AVIATION... .SHORT TERM...SATURDAY THROUGH MONDAY NIGHT STILL SOME SHOWERS OCCURRING EARLY THIS MORNING WITH A WEAK RIPPLE MOVING THROUGH THE AREA. HOWEVER...TODAY STILL LOOKS TO BE AN ACTIVE DAY ACROSS THE AREA. THE LATEST SPC SLIGHT RISK HAS SHIFTED A BIT FURTHER TO THE WEST NOW RUNNING EAST OF A POWELL TO WORLAND TO CASPER LINE. LATEST NAM NOW SHOWS CAPE VALUES OF GREATER THAN 1400 J/KG FROM THE BIG HORN BASIN EASTWARD THROUGH NATRONA AND JOHNSON COUNTY AROUND NOON TODAY. HOWEVER...THE GFS IS NOT AS BULLISH AND KEEPS THE DEEPER CAPE MAINLY ACROSS EASTERN JOHNSON COUNTY. LIFTED INDICES ARE THE SAME WITH THE NAM SHOWING VALUES AS LOW AS -7 WHILE THE GFS KEEPS THEM AROUND -3. MODEL SOUNDINGS ALSO SHOW DECENT DIRECTIONAL SHEAR THAT COULD GET SOME OF THE STORMS ROTATING. ONE CAVEAT IS THAT THE BEST INSTABILITY LOOKS TO BE NORTH AND EAST OF THE COUNTY WARNING AREA. NEVERTHELESS...IT LOOKS LIKE A DECENT POTENTIAL FOR STRONG TO POSSIBLY SEVERE THUNDERSTORMS ACROSS NORTHERN AND EASTERN PORTIONS OF THE AREA. THE CHANCE OF THUNDERSTORMS WILL DECREASE FURTHER SOUTH AND WEST AS MODELS SHOW DRIER AIR MIXING OUT THE ATMOSPHERE WITH THE SMALLEST CHANCE OF STORMS ACROSS FAR SOUTHWESTERN WYOMING. WITH MID LEVEL FLOW BECOMING SOUTHWESTERLY...TEMPERATURES WILL BE WARMER THAN YESTERDAY WITH MOST LOWER ELEVATIONS RISING INTO THE 80S. THE THREAT FOR SEVERE WEATHER SHOULD END THIS EVENING...BUT WITH THE TROUGH AXIS AND ASSOCIATED COLD FRONT STILL TO THE WEST AND SOME INSTABILITY STILL AROUND WE KEPT CHANCES FOR GENERAL THUNDERSTORMS GOING INTO THE NIGHTTIME. THINGS SHOULD BE COOLER AND A BIT QUIETER FOR SUNDAY AFTER THE PASSAGE OF THE FRONT. THERE WILL STILL BE SOME CYCLONIC CURVATURE OVER THE AREA ALONG WITH SOME LEFTOVER INSTABILITY SO WE HAVE MAINTAINED A CHANCE ACROSS ROUGHLY THE NORTHERN HALF OF THE COUNTY WARNING AREA WHERE THE BEST FORCING WILL BE. HIGH TEMPERATURES SHOULD AVERAGE AROUND 10 DEGREES COOLER THAN ON SATURDAY WITH A COOLER NORTHWEST FLOW OVER THE AREA. THINGS QUIET DOWN SIGNIFICANTLY ON MONDAY AS SOME TRANSITORY RIDGING MOVES ACROSS THE COWBOY STATE. MOST MODELS KEEP ANY FORCING NORTH OF THE AREA SO WE REMOVED POPS FROM A LOT OF AREAS WITH THE EXCEPTION OF THE FAR NORTH AND SOME OF THE NORTHERN MOUNTAINS. .LONG TERM...TUESDAY THROUGH SATURDAY NORTH AND CENTRAL WYOMING WILL SEE A CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS THROUGH THIS PERIOD WHILE THE SOUTHWEST WILL BE DRIER...THUNDERSTORM ACTIVITY MUCH MORE ISOLATED. MEDIUM RANGE GLOBAL MODELS IN GENERAL AGREEMENT ON DROPPING UPPER LOW CURRENTLY ALONG THE SW COAST OF ALASKA DOWN ALONG THE CANADIAN ROCKIES MID-WEEK WITH RIDGE AMPLIFYING ACROSS THE EASTERN PACIFIC. THIS OVERALL PATTERN CONTINUES TO AMPLIFY LATE IN THE WEEK WITH UPPER TROUGH DIGGING INTO THE INTERMOUNTAIN WEST. SPREAD INCREASES BETWEEN GFS AND ECMWF FRIDAY AND SATURDAY WITH ECMWF SHOWING MORE AMPLIFICATION...LOWER HEIGHTS ACROSS THE NORTHERN ROCKIES BY SATURDAY. ON TUESDAY...A DISTURBANCE FROM THE SUB-TROPICAL EASTERN PACIFIC GETS KICKED INLAND ACROSS THE GREAT BASIN AND CENTRAL ROCKIES. THIS SYSTEM WILL INTERACT WITH FRONTAL BOUNDARY ALONG THE EAST SLOPES OF THE DIVIDE. STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE OVER THE EASTERN ZONES WHERE BETTER CAPE AND DIRECTIONAL SHEAR IS SHOWN. WEDNESDAY THROUGH SATURDAY...RIPPLES ROTATING AROUND THE BASE OF INTERMOUNTAIN/ROCKIES MEAN TROUGH WILL CONTINUE TO INTERACT WITH QUASI-STATIONARY FRONT ALONG THE EAST SLOPES OF THE DIVIDE WITH SCATTERED AFTERNOON SHOWERS AND THUNDERSTORMS ALONG AND EAST OF THE FRONT. THE BEST MOISTURE AND INSTABILITY WILL REMAIN ACROSS EAST CENTRAL ZONES AND THE BIG HORN BASIN WHERE THE BEST POTENTIAL FOR STRONG TO SEVERE STORMS WILL REMAIN...ALONG WITH HEAVY RAIN AND THE THREAT OF FLASH FLOODING. HIGHS WILL MOSTLY BE IN THE 70S ACROSS THE VALLEYS AND BASINS THROUGH THE PERIOD. && .AVIATION.../18Z ISSUANCE/ EAST OF THE DIVIDE...KCOD/KCPR/KLND/KRIW/KWRL ROUTES SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER AND NEAR THE MOUNTAINS AROUND 19Z AND MOVE NORTHEAST ACROSS THE LOWER ELEVATIONS. SOME STORMS WILL PRODUCE LARGE HAIL AND WIND GUSTS TO 55 KNOTS. STORMS WILL BE THE STRONGEST AND MOST NUMEROUS LATE IN THE AFTERNOON AND EVENING HOURS...ESPECIALLY FROM EAST OF KLND...TO KCPR AND NORTH TO KBYG... AND ALSO IN THE BIG HORN BASIN INCLUDING KCOD. HOWEVER...VFR CONDITIONS WILL PREVAIL WITH LOCAL MVFR CONDITIONS IN/NEAR THUNDERSTORMS. MORE IN THE WAY OF ISOLATED SHOWERS AND STORMS WILL OCCUR AFTER 03Z SUNDAY LASTING THROUGH 15Z SUNDAY...AND UNTIL 18Z NEAR KCOD. WEST OF THE DIVIDE...KBPI/KJAC/KPNA/KRKS ROUTES SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER AND NEAR THE MOUNTAINS AROUND 19Z AND MOVE NORTHEAST ACROSS THE LOWER ELEVATIONS. SOME STORMS WILL PRODUCE SMALL HAIL AND WIND GUSTS TO 45 KNOTS. STORMS WILL BE MORE NUMEROUS OVER NORTHWEST WY. VFR CONDITIONS WILL PREVAIL WITH LOCAL MVFR CONDITIONS IN STORMS. MORE IN THE WAY OF ISOLATED SHOWERS AND STORMS WILL OCCUR AFTER 03Z SUNDAY LASTING THROUGH 12Z SUNDAY...AND UNTIL 18Z IN NORTHWEST WY. && .HYDROLOGY... FRIDAY EVENING THUNDERSTORMS DUMPED AN ESTIMATED 0.75 TO 1 INCH OF RAIN IN THE HYATTVILLE AREA RESULTING IN MEDICINE LODGE CREEK PUSHING BACK ABOVE FLOOD STAGE. A FLOOD WARNING HAS BEEN ISSUED UNTIL 1130 AM. THE CREEK APPEARS TO BE CRESTING AT AROUND 3.9 FEET AT 2 AM...FLOOD STAGE IS 3.5 FEET. TEMPERATURES WILL WARM AGAIN TODAY ALTHOUGH NOT BE AS WARM AS THE MIDDLE OF THE WEEK. WEST OF THE DIVIDE...TEMPERATURES WILL REMAIN MILD OR SLIGHTLY WARMER TODAY BEFORE COOLING OFF AGAIN ON SUNDAY. EXPECT COOLER TEMPERATURES ON SUNDAY WITH NEAR TO SLIGHTLY BELOW NORMAL TEMPERATURES FOR MUCH OF NEXT WEEK. SHOWERS AND THUNDERSTORMS WILL BECOME MORE NUMEROUS EAST OF THE DIVIDE TODAY WITH BEST CHANCES FOR PRECIPITATION OCCURRING ACROSS NORTHERN AND EASTERN PORTIONS OF THE COUNTY WARNING AREA. THERE WILL BE A CHANCE FOR STRONG THUNDERSTORM EAST OF THE DIVIDE MAINLY EAST OF A LINE FROM POWELL TO WORLAND TO CASPER. FEWER BUT MORE INTENSE THUNDERSTORMS WITH LOCALLY HEAVY RAINFALL AND SOME SEVERE WEATHER EXPECTED. LESS CHANCE FOR PRECIPITATION WILL BE POSSIBLE SOUTH AND WEST OF THIS LINE. EXPECT MORE SHOWERS FOR SUNDAY ALTHOUGH THE THREAT FOR STRONG THUNDERSTORMS WILL BE GREATLY DIMINISHED. && .RIW WATCHES/WARNINGS/ADVISORIES... FLOOD WATCH IN EFFECT THROUGH SUNDAY AFTERNOON WYZ004-006-008>010-011545. FLOOD WATCH NOW IN EFFECT THROUGH SUNDAY AFTERNOON WYZ003-011545 && SHORT TERM...HATTINGS LONG TERM...AEM AVIATION...JB HYDROLOGY...HATTINGS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 951 AM MDT SAT MAY 31 2014 WYZ001>020-022>030-011100- ABSAROKA MOUNTAINS-BIGHORN MOUNTAINS SOUTHEAST- BIGHORN MOUNTAINS WEST-CASPER MOUNTAIN-CODY FOOTHILLS- EAST SWEETWATER COUNTY-FLAMING GORGE- GREEN MOUNTAINS AND RATTLESNAKE RANGE-JACKSON HOLE-LANDER FOOTHILLS- NATRONA COUNTY LOWER ELEVATIONS-NORTH BIG HORN BASIN- NORTHEAST JOHNSON COUNTY-OWL CREEK AND BRIDGER MOUNTAINS- ROCK SPRINGS AND GREEN RIVER-SALT RIVER AND WYOMING RANGES- SOUTH LINCOLN COUNTY-SOUTHEAST BIG HORN BASIN- SOUTHEAST JOHNSON COUNTY-SOUTHWEST BIG HORN BASIN-STAR VALLEY- TETON AND GROS VENTRE MOUNTAINS-UPPER GREEN RIVER BASIN- UPPER GREEN RIVER BASIN FOOTHILLS-UPPER WIND RIVER BASIN- WIND RIVER BASIN-WIND RIVER MOUNTAINS EAST-WIND RIVER MOUNTAINS WEST- YELLOWSTONE NATIONAL PARK- 951 AM MDT SAT MAY 31 2014 ...FLOOD WARNING CONTINUES FOR THE WIND RIVER NEAR DUBOIS AND RIVERTON... ...FLOOD WARNING FOR MEDICINE LODGE CREEK NEAR HYATTVILLE UNTIL 1130 AM... ...FLOOD WATCH THROUGH THIS MORNING ACROSS PORTIONS OF NORTHWEST AND NORTH CENTRAL WYOMING... .DAY ONE...TODAY AND TONIGHT ISOLATED SEVERE THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WIND POSSIBLE THIS AFTERNOON AND EVENING ALONG AND EAST OF A POWELL TO GREYBULL TO CASPER LINE. OTHERWISE SCATTERED AFTERNOON AND EVENING THUNDERSTORMS MOST AREAS WITH FREQUENT LIGHTNING...SMALL HAIL...AND WIND GUSTS OVER 40 MPH POSSIBLE. HIGH RIVER AND CREEK LEVELS FROM MOUNTAIN SNOWMELT...WITH MAINLY MINOR FLOODING EXPECTED IN SOME LOCATIONS. PLEASE SEE RIVER FLOOD PRODUCTS FOR ADDITIONAL DETAILS ON ONGOING OR EXPECTED FLOODING IN YOUR AREA. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THROUGH THE PERIOD...HIGH RUNNING RIVERS AND CREEKS WITH SOME FLOODING IN A FEW LOCATIONS. SUNDAY...THUNDERSTORMS POSSIBLE ACROSS NORTH AND CENTRAL WYOMING. TUESDAY THOUGH FRIDAY...A CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS EACH DAY...MAINLY ACROSS NORTH AND CENTRAL WYOMING. .SPOTTER INFORMATION STATEMENT... PLEASE REPORT ANY HAIL...THUNDERSTORM WIND GUSTS OF 50 MPH OR HIGHER...ANY RAINFALL AMOUNTS...AS WELL AS ANY OBSERVED FLOODING OR STREAMS RUNNING NEAR BANKFULL. THANK YOU. TEAM RIVERTON
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 741 AM MDT SAT MAY 31 2014 WYZ001-002-012-311430- ABSAROKA MOUNTAINS WY-TETON AND GROS VENTRE MOUNTAINS WY-YELLOWSTONE NATIONAL PARK WY- 741 AM MDT SAT MAY 31 2014 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN GALLATIN AND SOUTHWESTERN PARK COUNTIES IN SOUTH CENTRAL MONTANA...AND NORTHWESTERN PARK COUNTY IN CENTRAL WYOMING...AND NORTHWESTERN TETON COUNTY IN NORTHWEST WYOMING UNTIL 830 AM MDT... AT 736 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM BIG SPRINGS TO 6 MILES NORTH OF JUDKINS...AND MOVING NORTHEAST AT 65 MPH. WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. THESE STORMS WILL BE NEAR... WEST ENTRANCE RD AROUND 750 AM MDT. MYSTIC FALLS...FAIRY FALLS...HARLEQUIN LAKE AND GOOSE LAKE AROUND 755 AM MDT. GALLATIN LAKE...GRAND LOOP RD MADISON TO GRANT...KEPLER CASCADES... LOWER BASIN LAKE...FIREHOLE CANYON...FOUNTAIN PAINT POT...OLD FAITHFUL AND MADISON AROUND 800 AM MDT. WILLOW PARK AROUND 805 AM MDT. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. BRIEF HEAVY RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN RIVERTON AT 1-800-211-1448. LAT...LON 4501 10999 4473 10952 4400 11105 4500 11105 TIME...MOT...LOC 1341Z 223DEG 58KT 4456 11113 4406 11110 BRAUN
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 1133 AM MDT SAT MAY 31 2014 WYZ019-028>030-311932- EAST SWEETWATER COUNTY-FLAMING GORGE- GREEN MOUNTAINS AND RATTLESNAKE RANGE-ROCK SPRINGS AND GREEN RIVER- 1133 AM MDT SAT MAY 31 2014 SHOWERS AND THUNDERSTORMS WILL DEVELOP ACROSS SOUTHERN AND CENTRAL WYOMING LATE THIS MORNING AND INTO THE AFTERNOON HOURS...AND MOVE NORTHEAST AT 25 TO 35 MPH. A FEW STORMS COULD PRODUCE SMALL HAIL... GUSTY WINDS...BRIEF HEAVY RAIN...AND FREQUENT LIGHTNING. SEEK SAFE SHELTER INDOORS IF STORMS APPROACH YOUR LOCATION. JA
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 1232 PM MDT SAT MAY 31 2014 WYZ019-030-311915- EAST SWEETWATER COUNTY WY-GREEN MOUNTAINS AND RATTLESNAKE RANGE WY- 1232 PM MDT SAT MAY 31 2014 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN SWEETWATER AND EXTREME SOUTHERN FREMONT COUNTIES UNTIL 115 PM MDT... AT 1230 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 27 MILES NORTH OF I80 EXIT 152...OR 30 MILES NORTHWEST OF WAMSUTTER...MOVING NORTHEAST AT 30 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. THIS STORM WILL BE NEAR... RURAL NORTHEASTERN SWEETWATER COUNTY THROUGH 115 PM MDT RURAL SOUTHERN FREMONT COUNTY THROUGH 115 PM MDT IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. IN ADDITION...THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. BRIEF HEAVY RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN RIVERTON AT 1-800-211-1448. LAT...LON 4241 10815 4214 10769 4190 10830 4201 10849 TIME...MOT...LOC 1833Z 226DEG 25KT 4204 10831 BRAUN
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 1237 PM MDT SAT MAY 31 2014 WYZ019-026-028-030-311915- EAST SWEETWATER COUNTY WY-GREEN MOUNTAINS AND RATTLESNAKE RANGE WY-ROCK SPRINGS AND GREEN RIVER WY-UPPER GREEN RIVER BASIN WY- 1237 PM MDT SAT MAY 31 2014 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SWEETWATER COUNTY UNTIL 115 PM MDT... AT 1230 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR PILOT BUTTE...OR 11 MILES NORTHWEST OF ROCK SPRINGS...MOVING NORTHEAST AT 30 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. THIS STORM WILL BE NEAR... U.S. HWY 191 MILE MARKER 20 AROUND 1245 PM MDT. BOARS TUSK AROUND 110 PM MDT. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. IN ADDITION...THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. BRIEF HEAVY RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN RIVERTON AT 1-800-211-1448. LAT...LON 4223 10908 4190 10861 4161 10933 4174 10950 TIME...MOT...LOC 1837Z 223DEG 27KT 4174 10934 BRAUN
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 1238 PM MDT SAT MAY 31 2014 WYZ001>003-005-007-012>016-023>025-027-312045- ABSAROKA MOUNTAINS-CODY FOOTHILLS-JACKSON HOLE- OWL CREEK AND BRIDGER MOUNTAINS-SALT RIVER AND WYOMING RANGES- SOUTH LINCOLN COUNTY-SOUTHWEST BIG HORN BASIN-STAR VALLEY- TETON AND GROS VENTRE MOUNTAINS-UPPER GREEN RIVER BASIN FOOTHILLS- UPPER WIND RIVER BASIN-WIND RIVER MOUNTAINS EAST- WIND RIVER MOUNTAINS WEST-YELLOWSTONE NATIONAL PARK- 1238 PM MDT SAT MAY 31 2014 SHOWERS AND THUNDERSTORMS WILL DEVELOP ACROSS WESTERN AND NORTHERN WYOMING THIS AFTERNOON...AND MOVE NORTHEAST AT 25 TO 35 MPH. A FEW STORMS COULD PRODUCE SMALL HAIL...GUSTY WINDS...BRIEF HEAVY RAIN... AND FREQUENT LIGHTNING. THOSE WITH OUTDOOR INTERESTS...SHOULD SEEK SAFE SHELTER INDOORS IF STORMS APPROACH YOUR LOCATION. THOSE ON LAKES AND RESERVOIRS...SHOULD RETURN TO SHORE AND SEEK SHELTER IMMEDIATELY...IF APPROACHING HAZARDOUS WEATHER IS OBSERVED...OR THUNDER IS HEARD. JA
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 1255 PM MDT SAT MAY 31 2014 WYZ012-014-015-025-311945- TETON AND GROS VENTRE MOUNTAINS WY-UPPER GREEN RIVER BASIN FOOTHILLS WY-WIND RIVER MOUNTAINS EAST WY-WIND RIVER MOUNTAINS WEST WY- 1255 PM MDT SAT MAY 31 2014 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN FREMONT COUNTY IN CENTRAL WYOMING...AND SOUTHEASTERN TETON COUNTY IN NORTHWEST WYOMING...AND NORTHERN SUBLETTE COUNTY IN WEST CENTRAL WYOMING UNTIL 145 PM MDT... AT 1248 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 8 MILES NORTH OF U.S. HWY 191 MILE MARKER 130...OR 30 MILES SOUTHEAST OF JACKSON...MOVING NORTHEAST AT 15 MPH. HAIL UP TO PEA SIZE IN DIAMETER IS EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. THIS STORM WILL BE NEAR... RURAL NORTHERN SUBLETTE COUNTY THROUGH 145 PM MDT RURAL SOUTHEASTERN TETON COUNTY THROUGH 145 PM MDT RURAL NORTHWESTERN FREMONT COUNTY THROUGH 145 PM MDT IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. IN ADDITION...THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. BRIEF HEAVY RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN RIVERTON AT 1-800-211-1448. LAT...LON 4362 11005 4329 10960 4314 11022 4328 11038 TIME...MOT...LOC 1854Z 229DEG 16KT 4326 11022 BRAUN
The Riverton/Lander radar (KRIW), 128 km away, was scanning. The volume nearest the first event began at 19:34 UTC.
3 hail, 1 tornado, 1 funnel cloud. Local standard time, as filed.
A tornado touched down briefly on Dollar Lake. The tornado sucked up water from the lake before lifting. No damage was reported.
An off-duty US Forest Service employee photographed a funnel cloud northwest of Green River Lakes.
Numerous spotters reported nickel to quarter sized hail in and around Colter Bay.
Hail the size of quarters was reported in Lovell.
Nickel sized hail was observed on the north side of Lovell.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2014Every state in 2014This day in weather historyThe tornado archive for Wyoming, 2014Warnings in Wyoming, May 2014
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 511652, 521569, 511452, 511651, 521535.