Alert archive / Wyoming / High Wind Warnings in 2009
High Wind Warning 8, NWS Riverton, WY
NWS Riverton, WY issued this high wind warning at Sep 20, 2009, 2:39 PM MDT for Big Horn County, Johnson County, Park County, Wyoming. It took effect at Sep 20, 2009, 6:00 PM MDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 20, 2009, 2:39 PM MDT (20:39 UTC)
- In effect from
- Sep 20, 2009, 6:00 PM MDT
- Expired
- Sep 21, 2009, 2:57 AM MDT
- In force
- 9 hr
- Issued by
- NWS Riverton, WY
Counties Big Horn County, WY, Johnson County, WY, Park County, WY
The radar
The Riverton/Lander radar (KRIW), 148 km from the middle of the area, began a volume at 20:39 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 8.7 hours before the alert went out and 146 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 6 J/kg
- Mixed-layer CIN
- -145 J/kg
- Mixed-layer LCL
- 2743 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS75 KRIW 202039 NPWRIW URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 239 PM MDT SUN SEP 20 2009 ...HIGH WIND WARNING FOR NORTHERN BIGHORN BASIN AND NORTHEAST JOHNSON COUNTY TONIGHT... ...FREEZE WARNING FOR THE UPPER WIND RIVER BASIN TONIGHT... .A STRONG STORM SYSTEM WILL MOVE ACROSS THE COWBOY STATE TONIGHT...BRINGING MUCH COOLER...VERY WINDY CONDITIONS...AND SOME RAIN AND SNOW. A STRONG COLD FRONT WILL QUICKLY PUSH SOUTH ACROSS THE AREA TONIGHT...WITH STRONG NORTHWEST TO NORTHEAST WINDS EXPECTED BEHIND THE FRONT. THE STRONGEST WINDS WILL BE OVER NORTHERN BIGHORN BASIN AND THE LOWER ELEVATIONS OF NORTHERN JOHNSON...WHERE SUSTAINED WINDS ARE EXPECTED TO REACH BETWEEN 30 AND 45 MPH...WITH A FEW GUSTS AROUND 55 MPH. THE UPPER WIND RIVER BASIN IS EXPECTED TO REACH FREEZING TONIGHT BEHIND THE COLD FRONT. MORE WIDESPREAD FREEZING TEMPERATURES COULD OCCUR OVER THE LOWER ELEVATIONS MONDAY NIGHT...AS WINDS DECREASE AND THE SKY BECOMES MOSTLY CLEAR. WYZ016-211200- /O.NEW.KRIW.FZ.W.0003.090921T0600Z-090921T1500Z/ UPPER WIND RIVER BASIN- INCLUDING THE CITY OF...DUBOIS 239 PM MDT SUN SEP 20 2009 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MDT MONDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A FREEZE WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MDT MONDAY. A STRONG COLD FRONT WILL USHER IN MUCH COLDER AIR INTO THE UPPER WIND RIVER BASIN...WITH SUB FREEZING TEMPERATURES EXPECTED. ALTHOUGH A FEW AREAS HAVE REACHED FREEZING ALREADY...WIDESPREAD FREEZING TEMPERATURES ARE EXPECTED FROM CROWHEART TO DUBOIS TONIGHT. LOW TEMPERATURES TONIGHT ARE EXPECTED TO RANGE FROM THE LOWER 30S NEAR CROWHEART...TO THE MID AND UPPER 20S NEAR DUBOIS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL SENSITIVE PLANTS OR GARDENS. && $$ WYZ004-211200- /O.NEW.KRIW.HW.W.0008.090921T0000Z-090921T1200Z/ NORTH BIG HORN BASIN- INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN 239 PM MDT SUN SEP 20 2009 ...HIGH WIND WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 AM MDT MONDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO 6 AM MDT MONDAY. VERY STRONG NORTHWEST WINDS ARE EXPECTED TO DEVELOP OVER THE NORTHERN BIG HORN BASIN BEHIND A STRONG COLD FRONT THIS EVENING. NORTHWEST WINDS BETWEEN 30 AND 45 MPH ARE EXPECTED WITH A FEW GUSTS NEAR 55 MPH. WINDS ARE EXPECTED TO GRADUALLY DECREASE AFTER MIDNIGHT...BUT STILL REMAIN STRONG. RESIDENTS ARE URGED TO SECURE OR BRING INDOORS ANY LOOSE ITEMS. IN ADDITION...TRAVELERS DRIVING ACROSS THE BIGHORN MOUNTAINS TONIGHT CAN EXPECT TO ENCOUNTER SOME SNOW WITH REDUCED VISIBILITY...WITH GRANITE AND POWDER RIVER PASSES POTENTIALLY BECOMING SLICK IN SPOTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED OR OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS OF 58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE. && $$ WYZ010-211200- /O.NEW.KRIW.HW.W.0008.090921T0000Z-090921T1200Z/ NORTHEAST JOHNSON COUNTY- INCLUDING THE CITY OF...BUFFALO 239 PM MDT SUN SEP 20 2009 ...HIGH WIND WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 AM MDT MONDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO 6 AM MDT MONDAY. VERY STRONG NORTHWEST WINDS ARE EXPECTED TO DEVELOP OVER THE LOWER ELEVATIONS OF NORTHERN JOHNSON COUNTY BEHIND A STRONG COLD FRONT THIS EVENING. NORTHWEST WINDS BETWEEN 30 AND 45 MPH ARE EXPECTED WITH A FEW GUSTS NEAR 55 MPH. WINDS ARE EXPECTED TO GRADUALLY DECREASE AFTER MIDNIGHT...BUT STILL REMAIN STRONG. RESIDENTS ARE URGED TO SECURE OR BRING INDOORS ANY LOOSE ITEMS. IN ADDITION...TRAVELERS DRIVING ACROSS THE BIGHORN MOUNTAINS TONIGHT CAN EXPECT TO ENCOUNTER SOME SNOW WITH REDUCED VISIBILITY...WITH GRANITE AND POWDER RIVER PASSES POTENTIALLY BECOMING SLICK IN SPOTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED OR OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS OF 58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE. && $$ 21
2 follow-up statements
000 WWUS75 KRIW 210340 NPWRIW URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 940 PM MDT SUN SEP 20 2009 ...HIGH WIND WARNING FOR NORTHERN BIGHORN BASIN AND NORTHEAST JOHNSON COUNTY TONIGHT... ...FREEZE WARNING FOR THE UPPER WIND RIVER BASIN TONIGHT... ...FREEZE WATCH FOR THE LOWER ELEVATIONS OF CENTRAL WYOMING EARLY TUESDAY MORNING... .A STRONG STORM SYSTEM WILL MOVE ACROSS THE COWBOY STATE TONIGHT...BRINGING MUCH COOLER...VERY WINDY CONDITIONS...AND SOME RAIN AND SNOW. A STRONG COLD FRONT WILL QUICKLY PUSH SOUTH ACROSS THE AREA TONIGHT...WITH STRONG NORTHWEST TO NORTHEAST WINDS EXPECTED BEHIND THE FRONT. THE STRONGEST WINDS WILL BE OVER NORTHERN BIGHORN BASIN AND THE LOWER ELEVATIONS OF NORTHERN JOHNSON...WHERE SUSTAINED WINDS ARE EXPECTED TO REACH BETWEEN 30 AND 45 MPH...WITH A FEW GUSTS AROUND 55 MPH. THE UPPER WIND RIVER BASIN IS EXPECTED TO REACH FREEZING TONIGHT BEHIND THE COLD FRONT. MORE WIDESPREAD FREEZING TEMPERATURES COULD OCCUR OVER THE LOWER ELEVATIONS MONDAY NIGHT...AS WINDS DECREASE AND THE SKY BECOMES MOSTLY CLEAR. WYZ004-211145- /O.NEW.KRIW.FZ.A.0002.090922T0600Z-090922T1500Z/ /O.CON.KRIW.HW.W.0008.000000T0000Z-090921T1200Z/ NORTH BIG HORN BASIN- INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN 940 PM MDT SUN SEP 20 2009 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 AM MDT MONDAY... ...FREEZE WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A FREEZE WATCH...WHICH IS IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING. A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 AM MDT MONDAY. STRONG NORTHWEST WINDS WILL CONTINUE OVERNIGHT. SUSTAINED WINDS OF 30 TO 40 MPH WITH GUSTS OF 50 TO 55 MPH CONTINUED ACROSS THE AREA THIS EVENING. THESE STRONG WINDS ARE EXPECTED TO CONTINUE FOR THE REMAINDER OF THE EVENING. WINDS ARE EXPECTED TO GRADUALLY DECREASE AFTER MIDNIGHT. RESIDENTS ARE URGED TO SECURE OR BRING INDOORS ANY LOOSE ITEMS. IN ADDITION...TRAVELERS DRIVING ACROSS THE BIGHORN MOUNTAINS TONIGHT CAN EXPECT TO ENCOUNTER SOME SNOW WITH REDUCED VISIBILITY...WITH GRANITE AND POWDER RIVER PASSES POTENTIALLY BECOMING SLICK IN SPOTS. CLEARING SKIES AND A COLD DRY AIRMASS WILL RESULT IN TEMPERATURES FALLING TO NEAR OR BELOW FREEZING MONDAY NIGHT AND EARLY TUESDAY MORNING. THE COLDEST TEMPERATURES ARE EXPECTED ALONG THE LOWER RIVER VALLEYS. PEOPLE SHOULD TAKE PRECAUTIONS TO PROTECT VEGETABLE CROPS AND OTHER COLD-SENSITIVE PLANTS FROM THE POSSIBILITY OF A HARD FROST OR FREEZE EARLY TUESDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED OR OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS OF 58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE. A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE. THESE CONDITIONS COULD KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ WYZ010-211145- /O.NEW.KRIW.FZ.A.0002.090922T0600Z-090922T1500Z/ /O.CON.KRIW.HW.W.0008.000000T0000Z-090921T1200Z/ NORTHEAST JOHNSON COUNTY- INCLUDING THE CITY OF...BUFFALO 940 PM MDT SUN SEP 20 2009 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 AM MDT MONDAY... ...FREEZE WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A FREEZE WATCH...WHICH IS IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING. A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 AM MDT MONDAY. STRONG NORTHWEST WINDS AT 35 TO 45 MPH CONTINUED ACROSS NORTHEAST JOHNSON COUNTY THIS EVENING. THESE WINDS ARE EXPECTED TO CONTINUE THROUGH THE REST OF THE EVENING BEFORE GRADUALLY DECREASING AFTER MIDNIGHT. RESIDENTS ARE URGED TO SECURE OR BRING INDOORS ANY LOOSE ITEMS. IN ADDITION...TRAVELERS DRIVING ACROSS THE BIGHORN MOUNTAINS TONIGHT CAN EXPECT TO ENCOUNTER SOME SNOW WITH REDUCED VISIBILITY...WITH GRANITE AND POWDER RIVER PASSES POTENTIALLY BECOMING SLICK IN SPOTS. CLEARING SKIES AND A COLD DRY AIRMASS WILL RESULT IN TEMPERATURES FALLING TO NEAR OR BELOW FREEZING MONDAY NIGHT AND EARLY TUESDAY MORNING. THE COLDEST TEMPERATURES ARE EXPECTED ALONG THE LOWER RIVER VALLEYS. PEOPLE SHOULD TAKE PRECAUTIONS TO PROTECT VEGETABLE CROPS AND OTHER COLD-SENSITIVE PLANTS FROM THE POSSIBILITY OF A HARD FROST OR FREEZE EARLY TUESDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED OR OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS OF 58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE. A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE. THESE CONDITIONS COULD KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ WYZ016-211145- /O.CON.KRIW.FZ.W.0003.090921T0600Z-090921T1500Z/ UPPER WIND RIVER BASIN- INCLUDING THE CITY OF...DUBOIS 940 PM MDT SUN SEP 20 2009 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM MDT MONDAY... A FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM MDT MONDAY. A STRONG COLD FRONT WILL USHER IN MUCH COLDER AIR INTO THE UPPER WIND RIVER BASIN...WITH SUB FREEZING TEMPERATURES EXPECTED. ALTHOUGH A FEW AREAS HAVE REACHED FREEZING ALREADY...WIDESPREAD FREEZING TEMPERATURES ARE EXPECTED FROM CROWHEART TO DUBOIS TONIGHT. LOW TEMPERATURES TONIGHT ARE EXPECTED TO RANGE FROM THE LOWER 30S NEAR CROWHEART...TO THE MID AND UPPER 20S NEAR DUBOIS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL SENSITIVE PLANTS OR GARDENS. && $$ WYZ003-005-006-011-017>020-028>030-211145- /O.NEW.KRIW.FZ.A.0002.090922T0600Z-090922T1500Z/ CODY FOOTHILLS-SOUTHWEST BIG HORN BASIN-SOUTHEAST BIG HORN BASIN- SOUTHEAST JOHNSON COUNTY-WIND RIVER BASIN-LANDER FOOTHILLS- GREEN MOUNTAINS AND RATTLESNAKE RANGE- NATRONA COUNTY LOWER ELEVATIONS-ROCK SPRINGS AND GREEN RIVER- FLAMING GORGE-EAST SWEETWATER COUNTY- INCLUDING THE CITIES OF...CODY...MEETEETSE...THERMOPOLIS... WORLAND...KAYCEE...RIVERTON...SHOSHONI...LANDER...JEFFREY CITY... CASPER...ROCK SPRINGS...GREEN RIVER...WAMSUTTER 940 PM MDT SUN SEP 20 2009 ...FREEZE WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A FREEZE WATCH...WHICH IS IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING. CLEARING SKIES AND A COLD DRY AIRMASS WILL RESULT IN TEMPERATURES FALLING TO NEAR OR BELOW FREEZING MONDAY NIGHT AND EARLY TUESDAY MORNING. THE COLDEST TEMPERATURES ARE EXPECTED ALONG THE LOWER RIVER VALLEYS. PEOPLE SHOULD TAKE PRECAUTIONS TO PROTECT VEGETABLE CROPS AND OTHER COLD-SENSITIVE PLANTS FROM THE POSSIBILITY OF A HARD FROST OR FREEZE EARLY TUESDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE. THESE CONDITIONS COULD KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ MEUNIER
000 WWUS75 KRIW 210857 NPWRIW URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 257 AM MDT MON SEP 21 2009 ...HIGH WIND WARNING FOR NORTHERN BIGHORN BASIN AND NORTHEAST JOHNSON COUNTY TONIGHT... ...FREEZE WARNING FOR THE UPPER WIND RIVER BASIN TONIGHT... ...FREEZE WATCH FOR THE LOWER ELEVATIONS OF CENTRAL WYOMING EARLY TUESDAY MORNING... .A STRONG STORM SYSTEM WILL MOVE ACROSS EASTERN WYOMING TODAY...BRINGING MUCH COOLER...VERY WINDY CONDITIONS...AND SOME RAIN AND SNOW. THE UPPER WIND RIVER BASIN IS EXPECTED TO REACH FREEZING EARLY THIS MORNING THROUGH AROUND DAWN BEHIND A COLD FRONT. MORE WIDESPREAD FREEZING TEMPERATURES COULD OCCUR OVER THE LOWER ELEVATIONS OF CENTRAL WYOMING AND SWEETWATER COUNTY LATE MONDAY NIGHT AND TUESDAY MORNING...AS WINDS DECREASE AND THE SKY BECOMES MOSTLY CLEAR. WYZ004-010-212200- /O.CAN.KRIW.HW.W.0008.000000T0000Z-090921T1200Z/ /O.CON.KRIW.FZ.A.0002.090922T0600Z-090922T1500Z/ NORTH BIG HORN BASIN-NORTHEAST JOHNSON COUNTY- INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN... BUFFALO 257 AM MDT MON SEP 21 2009 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... ...HIGH WIND WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE HIGH WIND WARNING. A FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING. CLEARING SKIES AND A COLD DRY AIRMASS WILL RESULT IN TEMPERATURES FALLING TO NEAR OR BELOW FREEZING MONDAY NIGHT AND EARLY TUESDAY MORNING. THE COLDEST TEMPERATURES ARE EXPECTED ALONG THE LOWER RIVER VALLEYS. PEOPLE SHOULD TAKE PRECAUTIONS TO PROTECT VEGETABLE CROPS AND OTHER COLD-SENSITIVE PLANTS FROM THE POSSIBILITY OF A HARD FROST OR FREEZE EARLY TUESDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE. THESE CONDITIONS COULD KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ WYZ016-211500- /O.CON.KRIW.FZ.W.0003.000000T0000Z-090921T1500Z/ UPPER WIND RIVER BASIN- INCLUDING THE CITY OF...DUBOIS 257 AM MDT MON SEP 21 2009 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM MDT THIS MORNING... A FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM MDT THIS MORNING. A STRONG COLD FRONT WILL USHER IN MUCH COLDER AIR INTO THE UPPER WIND RIVER BASIN...WITH SUB FREEZING TEMPERATURES EXPECTED. ALTHOUGH A FEW AREAS HAVE REACHED FREEZING ALREADY...WIDESPREAD FREEZING TEMPERATURES ARE EXPECTED FROM CROWHEART TO DUBOIS THIS MORNING. LOW TEMPERATURES TONIGHT ARE EXPECTED TO RANGE FROM THE LOWER 30S NEAR CROWHEART...TO THE MID AND UPPER 20S NEAR DUBOIS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL SENSITIVE PLANTS OR GARDENS. && $$ WYZ003-005-006-011-017>020-028>030-212200- /O.CON.KRIW.FZ.A.0002.090922T0600Z-090922T1500Z/ CODY FOOTHILLS-SOUTHWEST BIG HORN BASIN-SOUTHEAST BIG HORN BASIN- SOUTHEAST JOHNSON COUNTY-WIND RIVER BASIN-LANDER FOOTHILLS- GREEN MOUNTAINS AND RATTLESNAKE RANGE- NATRONA COUNTY LOWER ELEVATIONS-ROCK SPRINGS AND GREEN RIVER- FLAMING GORGE-EAST SWEETWATER COUNTY- INCLUDING THE CITIES OF...CODY...MEETEETSE...THERMOPOLIS... WORLAND...KAYCEE...RIVERTON...SHOSHONI...LANDER...JEFFREY CITY... CASPER...ROCK SPRINGS...GREEN RIVER...WAMSUTTER 257 AM MDT MON SEP 21 2009 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... A FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING. CLEARING SKIES AND A COLD DRY AIRMASS WILL RESULT IN TEMPERATURES FALLING TO NEAR OR BELOW FREEZING MONDAY NIGHT AND EARLY TUESDAY MORNING. THE COLDEST TEMPERATURES ARE EXPECTED ALONG THE LOWER RIVER VALLEYS. PEOPLE SHOULD TAKE PRECAUTIONS TO PROTECT VEGETABLE CROPS AND OTHER COLD-SENSITIVE PLANTS FROM THE POSSIBILITY OF A HARD FROST OR FREEZE EARLY TUESDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE. THESE CONDITIONS COULD KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ SMITH
What forecasters said that day
The local office's own words before this high wind warning went out, 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 this high wind warning went out at Sep 20, 3:27 AM MDT, 11 hours 12 minutes earlier.
Area forecast discussion, Sep 20, 3:27 AM MDT, 11 hours 12 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RIVERTON WY 327 AM MDT SUN SEP 20 2009 .SHORT TERM...TODAY THROUGH TUESDAY NIGHT WELL DEFINED TROUGH WILL MOVE SOUTHEASTWARD FROM SOUTHWESTERN CANADA INTO CENTRAL MT TODAY WITH THE GFS AND NAM IN GOOD AGREEMENT ON THE PROGRESSION OF THE TROUGH. A LEADING SHORTWAVE AND ASSOCIATED PACIFIC COLD FRONT WILL MOVE ACROSS WESTERN WY THIS MORNING AND ACROSS CENTRAL WY THIS AFTERNOON. SCATTERED SHOWERS AND THUNDERSTORMS WILL MOVE THROUGH WESTERN WY THIS MORNING WITH LOW LEVEL CONVERGENCE ALONG THE COLD FRONT AND WEAK INSTABILITY. CONVECTIVE ACTIVITY WILL DIMINISH DURING THE AFTERNOON WEST OF THE DIVIDE...AS GFS AND NAM SHOW DRIER AND MORE STABLE AIR MOVING INTO THE REGION FROM THE WEST. SCATTERED SHOWER AND THUNDERSTORM ACTIVITY WILL MOVE INTO CENTRAL WY THIS AFTERNOON...AS THE COLD FRONT MOVES EAST OF THE DIVIDE WHERE LIFTED INDICES ARE PROGGED TO BE SLIGHTLY BELOW 0 C. STRONG H25 JET CORE OF 100+ KT TO THE WEST OF THE TROUGH AXIS WILL CAUSE THE TROUGH IN CENTRAL MT THIS EVENING TO DIG SHARPLY SOUTHEASTWARD ACROSS EASTERN WY TONIGHT. INCREASING LOW AND MID LEVEL MOISTURE ACROSS JOHNSON AND NATRONA COUNTIES COMBINED WITH NORTHERLY UPSLOPE FLOW AND MODERATE QG FORCING WILL PRODUCE LIGHT TO MODERATE PRECIPITATION TONIGHT. POWERFUL SECONDARY COLD FRONT WILL CAUSE H7 TEMPERATURES TO FALL TO AROUND MINUS 6 C OVER JOHNSON COUNTY BY 03Z AND OVER NATRONA COUNTY BY 09Z...AND SNOW LEVELS WILL FALL TO AROUND 6500 FEET. A TREND TO SHIFT THE BAND OF HEAVIEST PRECIPITATION INTO FAR EASTERN WY AND THE WESTERN DAKOTAS WAS NOTED IN THE 00Z RUNS OF THE GFS AND NAM. LOWERED PRECIPITATION AMOUNTS SLIGHTLY IN EASTERN PORTIONS OF CENTRAL WY. THE BIGHORN MOUNTAINS ARE EXPECTED TO RECEIVE BETWEEN 3 AND 6 INCHES OF SNOW THROUGH 15Z MONDAY...WHILE CASPER MOUNTAIN COULD RECEIVE 2 TO 4 INCHES THROUGH 18Z. THE LOWER ELEVATIONS OF JOHNSON AND NATRONA COUNTIES COULD SEE SOME MINOR ACCUMULATIONS...BUT AT THIS TIME IT APPEARS MORE LIKELY THAT THESE AREAS WILL SEE RAIN CHANGING TO A MIXTURE OF RAIN AND SNOW WITH BOUNDARY LAYER TEMPERATURES STAYING SEVERAL DEGREES ABOVE FREEZING. THE TROUGH WILL CONTINUE TO DROP SOUTHWARD INTO WESTERN NEB MONDAY AFTERNOON WITH BOTH THE GFS AND NAM CLOSING OFF THE CIRCULATION. LIGHT PRECIPITATION IS EXPECTED TO END ACROSS NATRONA COUNTY AROUND 18Z. COLD CORE OF AIR OVER WESTERN AND CENTRAL WY MONDAY WILL RESULT IN HIGH TEMPERATURES 8-12 F BELOW NORMAL. AS THE UPPER LOW CONTINUES TO MOVE SOUTHWARD ACROSS WESTERN NEB AND INTO WESTERN KS MONDAY NIGHT...STRONG SUBSIDENCE ON THE NORTHWESTERN SIDE OF THE UPPER LOW WILL PRODUCE CLEARING ACROSS WY. CLEAR SKIES...LIGHT WINDS AND DEWPOINTS IN THE LOWER TO MID 20S MONDAY NIGHT WILL PRODUCE STRONG RADIATIONAL COOLING IN THE LOWER ELEVATIONS OF CENTRAL AND WESTERN WY WITH A GOOD CHANCE OF A HARD FREEZE ACROSS MUCH OF THE REGION. LARGE UPPER HIGH CENTERED OVER THE PAC NW WILL BUILD OVER WY FROM THE NORTHWEST TUESDAY. THIS UPPER HIGH WILL BRING CLEAR SKIES AND DRY WEATHER TO THE REGION TUESDAY WITH HIGH TEMPERATURES RETURNING TO NEAR NORMAL. .LONG TERM...WEDNESDAY THROUGH SUNDAY TEMPERATURES WILL RECOVER TO NEAR NORMAL IN MOST AREAS WEDNESDAY AS AN UPPER LEVEL LOW PRESSURE SYSTEM IN EASTERN COLORADO IS SUPPLANTED BY HIGH PRESSURE MOVING INTO THE INTERMOUNTAIN REGION FROM THE NORTHWEST. COOLER TEMPS FOR THE EASTERN AND SOUTHERN ZONES AS THE COOLER AIRMASS TO THE SOUTH RETAINS SOME INFLUENCE THROUGH THURSDAY. GFS KEEPS H7 TEMPS FOR SWEETWATER COUNTY IN THE 0 TO +2 C RANGE. WHILE ECMWF IS A BIT WARMER AT 2-4 C. HIGH PRESSURE WILL REMAIN IN PLACE THOUGH FRIDAY. GFS CUTS OFF ANOTHER UPPER LOW LATE FRIDAY AND PUSHES A COLD FRONT THROUGH THE STATE EARLY SATURDAY. EURO HAS YET TO RESOLVE A SIMILAR FEATURE. IN ANY CASE...GFS HAS LITTLE MOISTURE TO GO WITH POTENTIAL DYNAMICS SO HAVE NOT INCLUDED POPS FOR THE SATURDAY/SUNDAY PERIOD. && .AVIATION... A TROUGH OF LOW PRESSURE AND ASSOCIATED COLD FRONT WILL MOVE ACROSS THE AREA TODAY. ISOLATED TO SCATTERED SHOWERS WILL PRECEDE THE COLD FRONT WEST OF THE DIVIDE THIS MORNING...THE SHOWERS MORE NUMEROUS ACROSS THE SOUTHWEST ALONG KRKS-KBPI ROUTES WHERE LOCAL MVFR CONDITIONS MAY BE ENCOUNTERED. RAPIDLY CLEARING SKIES AND INCREASING NW WIND WILL OCCUR IN THE WEST BEHIND THE FRONT IN THE AFTERNOON. EAST OF THE DIVIDE...ISOLATED TO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP AHEAD OF A COLD FRONT DROPPING SOUTH OUT OF MONTANA THIS AFTERNOON. THE SHOWERS AND THUNDERSTORMS WILL BE MOST NUMEROUS VCNTY AND EAST OF A KCOD-KWRL-KCPR LINE. LOWERING CIGS AND MORE WIDESPREAD PRECIPITATION WILL FOLLOW THE FRONT SUNDAY EVENING WITH SNOW LEVELS LOWERING TO NEAR 6500 FEET BY EARLY MONDAY MORNING. EXPECT AREAS OF MVFR/IFR CONDITIONS AND MOUNTAIN OBSCURATIONS EAST OF THE DIVIDE AFTER 06Z MONDAY. && .FIRE WEATHER... A PACIFIC COLD FRONT WILL MOVE ACROSS WESTERN WYOMING THIS MORNING AND CONTINUE ACROSS CENTRAL WYOMING THIS AFTERNOON. DAYTIME TEMPERATURES WILL BE 10-14 F COOLER THAN TEMPERATURES ON SATURDAY...AND AFTERNOON RELATIVE HUMIDITIES WILL BE IN THE UPPER TEENS AND 20S IN THE LOWER ELEVATIONS. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED ALONG THE COLD FRONT IN THE MORNING WEST OF THE DIVIDE AND IN THE AFTERNOON EAST OF THE DIVIDE. A STRONGER COLD FRONT WILL MOVE ACROSS THE REGION TONIGHT. IT WILL BRING MUCH COOLER AIR TO THE REGION LATE TONIGHT AND MONDAY. HIGH TEMPERATURES MONDAY WILL BE 8-12 F BELOW NORMAL. UPSLOPE FLOW AND INCREASING MOISTURE EAST OF THE DIVIDE LATE TONIGHT AND MONDAY MORNING IS EXPECTED TO BRING WETTING RAIN/SNOW TO JOHNSON AND NATRONA COUNTIES. SNOW LEVELS WILL BE AROUND 6500 FEET LATE TONIGHT AND MONDAY MORNING WITH 3-6 INCHES POSSIBLE IN THE BIGHORN MOUNTAINS AND 2-4 INCHES ON CASPER MOUNTAIN. && .RIW WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...SMITH LONG TERM...BERC AVIATION...AEM FIRE WEATHER...SMITH
Hazardous weather outlook, Sep 20, 5:01 AM MDT, 9 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 501 AM MDT SUN SEP 20 2009 WYZ001>020-022>030-211101- 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- 501 AM MDT SUN SEP 20 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED WEST OF THE DIVIDE THIS MORNING AND EAST OF THE DIVIDE THIS AFTERNOON. THUNDERSTORMS WILL BE CAPABLE OF PRODUCING GUSTY WIND...SMALL HAIL AND LIGHTNING. A STRONG COLD FRONT WILL MOVE SOUTHWARD ACROSS CENTRAL WYOMING TONIGHT. MOISTURE ASSOCIATED WITH THE FRONT AND UPSLOPE FLOW BEHIND THE FRONT WILL BRING MEASURABLE RAIN AND SNOW TO AREAS EAST OF THE DIVIDE TONIGHT. SNOW LEVELS WILL FALL TO AROUND 6500 FEET LATE TONIGHT. 2 TO 4 INCHES OF SNOW ARE EXPECTED IN THE BIGHORN MOUNTAINS AND 1 TO 2 INCHES ON CASPER MOUNTAIN. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY UPSLOPE FLOW WILL CONTINUE THROUGH MONDAY MORNING IN EASTERN PORTIONS OF CENTRAL WYOMING WITH 3 TO 6 INCHES OF TOTAL SNOWFALL POSSIBLE IN THE BIGHORNS AND 2 TO 4 INCHES POSSIBLE ON CASPER MOUNTAIN. SKIES WILL CLEAR ACROSS CENTRAL AND WESTERN WYOMING MONDAY NIGHT. WITH CLEAR SKIES...LIGHT WINDS AND A COLD AIRMASS IN PLACE MONDAY NIGHT...A HARD FREEZE IS LIKELY ACROSS MANY OF THE LOWER ELEVATIONS OF CENTRAL AND WESTERN WYOMING. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT HAIL AND WIND GUSTS IN EXCESS OF 40 MPH TODAY. THANK YOU. TEAM RIVERTON
In the hours before
Special weather statement, Sep 20, 1:06 PM MDT, 1 hour 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 106 PM MDT SUN SEP 20 2009 WYZ012-013-202100- JACKSON HOLE-TETON AND GROS VENTRE MOUNTAINS- 106 PM MDT SUN SEP 20 2009 AN WEST-TO-EAST ORIENTED BAND OF SHOWERS AND EMBEDDED THUNDERSTORMS EXISTS FROM NEAR DRIGGS TO JUST NORTH OF MOOSE TO TOGWOTEE PASS. THIS BAND WILL GRADUALLY DRIFT SOUTH THROUGH 3 PM...AFFECTING TETON VILLAGE...MOOSE...KELLY...AND THE NORTHERN COMMUNITIES OF JACKSON. EXPECT BRIEF LIGHT TO MODERATE RAIN...A FEW LIGHTNING STRIKES AND WIND GUSTS TO 30 MPH. THERE IS ANOTHER BAND ALONG THE SOUTHERN YELLOWSTONE PARK BOUNDARY DRIFTING SOUTH AS WELL. TWB
Special weather statement, Sep 20, 1:32 PM MDT, 1 hour 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 132 PM MDT SUN SEP 20 2009 WYZ016-202100- UPPER WIND RIVER BASIN- 132 PM MDT SUN SEP 20 2009 AN WEST-TO-EAST ORIENTED BAND OF SHOWERS AND EMBEDDED THUNDERSTORMS EXISTS FROM TOGWOTEE PASS TO NORTH OF DUBOIS. THIS BAND WILL GRADUALLY DRIFT SOUTH THROUGH 3 PM...AFFECTING DUNOIR...UNION PASS AND DUBOIS. EXPECT BRIEF LIGHT TO MODERATE RAIN...A FEW LIGHTNING STRIKES AND WIND GUSTS TO 40 MPH. TWB
Special weather statement, Sep 20, 1:51 PM MDT, 48 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 151 PM MDT SUN SEP 20 2009 WYZ015-019-026-030-202030- EAST SWEETWATER COUNTY-GREEN MOUNTAINS AND RATTLESNAKE RANGE-UPPER GREEN RIVER BASIN-WIND RIVER MOUNTAINS EAST- 151 PM MDT SUN SEP 20 2009 ...SIGNIFICANT WEATHER ADVISORY FOR FREMONT AND SWEETWATER COUNTIES UNTIL 230 PM MDT... AT 149 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM NEAR OREGON BUTTES...OR 33 MILES EAST OF FARSON...MOVING EAST AT 20 MPH. PENNY SIZE HAIL...AND WINDS AROUND 40 MPH ARE POSSIBLE WITH THIS STORM. RESIDENTS IN NORTHERN SWEETWATER AND SOUTHERN FREMONT COUNTIES... INCLUDING THE LOCATION OF OREGON BUTTES...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOVE INDOORS IMMEDIATELY AS THIS STORM APPROACHES YOUR LOCATION. THIS IS A POTENTIALLY DANGEROUS STORM. IF YOU ARE IN ITS PATH...YOU SHOULD BE PREPARED FOR GUSTY WINDS...HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. IF A STURDY STRUCTURE IS NOT AVAILABLE...SEEK SHELTER IN A VEHICLE WITH THE WINDOWS UP. && REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN RIVERTON AT 1-800-211-1448. LAT...LON 4220 10816 4195 10829 4219 10899 4235 10891 TIME...MOT...LOC 1950Z 287DEG 19KT 4224 10881 T. BAKER
Special weather statement, Sep 20, 2:10 PM MDT, 29 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
210 PM MDT SUN SEP 20 2009
WYZ028>030-202100-
EAST SWEETWATER COUNTY-FLAMING GORGE-ROCK SPRINGS AND GREEN RIVER-
210 PM MDT SUN SEP 20 2009
...SIGNIFICANT WEATHER ADVISORY FOR SWEETWATER COUNTY UNTIL 300 PM
MDT...
AT 209 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 9 MILES NORTH OF STATE HWY 414 MILE MARKER 140...
OR 11 MILES NORTHWEST OF MANILA...MOVING EAST AT 30 MPH.
PEA SIZE HAIL...AND WINDS AROUND 40 MPH ARE POSSIBLE WITH THIS STORM.
RESIDENTS IN SOUTHWESTERN SWEETWATER COUNTY...INCLUDING THE LOCATIONS
OF STATE HWY 530 MILE MARKER 30 TO 40...SQUAW HOLLOW BOAT RAMP ON
FLAMING GORGE...U.S. HWY 191 MILE MARKER 550 TO 540...SHOULD MONITOR
THE WEATHER SITUATION CLOSELY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF ON OR NEAR FLAMING GORGE...GET OUT OF THE WATER AND MOVE INDOORS
OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 15 MILES
FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU ARE
CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER NOW.
DONT BE CAUGHT ON THE WATER IN A THUNDERSTORM
&&
REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
RIVERTON AT 1-800-211-1448.
LAT...LON 4107 10994 4124 10989 4116 10904 4099 10908
4099 10956
TIME...MOT...LOC 2010Z 281DEG 25KT 4114 10979
T. BAKERSpecial weather statement, Sep 20, 2:21 PM MDT, 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 221 PM MDT SUN SEP 20 2009 WYZ005-007-017-202100- OWL CREEK AND BRIDGER MOUNTAINS-SOUTHWEST BIG HORN BASIN-WIND RIVER BASIN- 221 PM MDT SUN SEP 20 2009 ...SIGNIFICANT WEATHER ADVISORY FOR FREMONT AND HOT SPRINGS COUNTIES UNTIL 300 PM MDT... AT 219 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 15 MILES WEST OF U.S. HWY 20/789 MILE MARKER 120 TO STATE HWY 134 MILE MARKER 10...OR ALONG A LINE EXTENDING FROM 17 MILES SOUTHWEST OF THERMOPOLIS TO 15 MILES NORTH OF RIVERTON...MOVING EAST AT 25 MPH. PEA SIZE HAIL...AND WINDS AROUND 40 MPH ARE POSSIBLE WITH THESE STORMS. RESIDENTS IN CENTRAL FREMONT AND SOUTHERN HOT SPRINGS COUNTIES...INCLUDING BOYSEN RESERVOIR...SHOSHONI AND MISSOURI VALLEY...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN RIVERTON AT 1-800-211-1448. LAT...LON 4357 10791 4315 10801 4315 10865 4357 10855 TIME...MOT...LOC 2020Z 270DEG 20KT 4348 10844 4324 10850 T. BAKER
Special weather statement, Sep 20, 2:33 PM MDT, 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 233 PM MDT SUN SEP 20 2009 WYZ019-030-202115- EAST SWEETWATER COUNTY-GREEN MOUNTAINS AND RATTLESNAKE RANGE- 233 PM MDT SUN SEP 20 2009 ...SIGNIFICANT WEATHER ADVISORY FOR SWEETWATER COUNTY UNTIL 315 PM MDT... AT 232 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 18 MILES SOUTHEAST OF OREGON BUTTES...OR 43 MILES NORTHWEST OF WAMSUTTER...MOVING EAST AT 25 MPH. NICKEL SIZE HAIL IS POSSIBLE WITH THIS STORM. RESIDENTS IN NORTHERN SWEETWATER COUNTY...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN RIVERTON AT 1-800-211-1448. LAT...LON 4213 10797 4189 10806 4204 10870 4222 10864 TIME...MOT...LOC 2033Z 284DEG 23KT 4211 10855 T. BAKER
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 19, 8:23 PM MDT | Special Weather Statement | RIW | 52 min | |
| Sep 20, 1:51 PM MDT | Special Weather Statement | RIW | 39 min | |
| Sep 20, 2:21 PM MDT | Special Weather Statement | RIW | Hot Springs | 39 min |
| Sep 20, 2:33 PM MDT | Special Weather Statement | RIW | 42 min | |
| Sep 20, 2:39 PM MDT | Freeze Warning | RIW | Fremont | 18 hr |
| Sep 20, 2:41 PM MDT | Winter Weather Advisory | RIW | Natrona | 18 hr |
| Sep 20, 2:56 PM MDT | Special Weather Statement | RIW | Fremont | 49 min |
| Sep 20, 3:19 PM MDT | Special Weather Statement | RIW | Hot Springs | 41 min |
| Sep 20, 3:35 PM MDT | Special Weather Statement | RIW | Fremont | 40 min |
| Sep 20, 4:38 PM MDT | Special Weather Statement | RIW | Natrona | 37 min |
| Sep 20, 5:02 PM MDT | Special Weather Statement | RIW | Natrona | 43 min |
| Sep 20, 5:14 PM MDT | Special Weather Statement | RIW | Natrona | 46 min |
Nearby
High Wind Warnings in Wyoming, 2009Every high wind warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.