Alert archive / Wyoming / Wind Chill Warnings in 2011
Wind Chill Warning 3, NWS Riverton, WY
NWS Riverton, WY issued this wind chill warning at Jan 31, 2011, 2:59 AM MST for 7 counties in Wyoming. It took effect at Jan 31, 2011, 6:25 AM MST. It was in force for 30 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
- Jan 31, 2011, 2:59 AM MST (09:59 UTC)
- In effect from
- Jan 31, 2011, 6:25 AM MST
- Expired
- Feb 1, 2011, 12:00 PM MST
- In force
- 30 hr
- Issued by
- NWS Riverton, WY
Counties Big Horn County, WY, Fremont County, WY, Johnson County, WY, Natrona County, WY, Park County, WY, Sweetwater County, WY, Washakie County, WY
The radar
The Riverton/Lander radar (KRIW), 63 km from the middle of the area, began a volume at 10:05 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 00:00Z, 10.0 hours before the alert went out and 59 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1590 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
407 WWUS45 KRIW 310959 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 259 AM MST MON JAN 31 2011 ...BITTER COLD AIRMASS TO ENGULF THE AREA THE NEXT COUPLE DAYS... .AN ARCTIC AIRMASS WILL MOVE SOUTH ACROSS THE AREA WITH LIGHT SNOW DEVELOPING BEHIND IT. THE SNOW WILL BE COMBINED WITH BITTER COLD NORTH TO NORTHEAST WINDS CREATING WIND CHILLS BETWEEN MINUS 20 AND MINUS 45 ALONG WITH AREAS OF BLOWING SNOW...ESPECIALLY TONIGHT. WYZ028>030-311830- /O.NEW.KRIW.WC.W.0003.110201T0700Z-110201T1600Z/ ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY- INCLUDING THE CITIES OF...ROCK SPRINGS...GREEN RIVER...WAMSUTTER 259 AM MST MON JAN 31 2011 ...WIND CHILL WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MST TUESDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WIND CHILL WARNING...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MST TUESDAY. * SUMMARY AND TIMING...AN ARCTIC FRONT WILL MOVE INTO SWEETWATER COUNTY TODAY...WITH NORTHEAST WINDS INCREASING TO 15 TO 30 MPH WITH HIGHER GUSTS. THESE WINDS WILL COMBINE WITH TEMPERATURES OF 15 TO 25 BELOW ZERO TO PRODUCE DANGEROUS WIND CHILLS LATE TONIGHT INTO TUESDAY MORNING. * WIND CHILL VALUES...WIND CHILLS OF 35 TO 45 BELOW ZERO ARE EXPECTED. * IMPACTS...IT WILL BE DANGEROUS TO BE OUTDOORS TONIGHT AND TUESDAY MORNING DUE TO THE VERY LOW WIND CHILLS. FROSTBITE CAN OCCUR ON EXPOSED SKIN IN A VERY SHORT TIME. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ004-311800- /O.CON.KRIW.WW.Y.0005.000000T0000Z-110131T1800Z/ NORTH BIG HORN BASIN- INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN 259 AM MST MON JAN 31 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * SUMMARY AND TIMING...LIGHT SNOW WILL FALL ACROSS THE AREA BEFORE TAPERING OFF TO FLURRIES LATE THIS MORNING. TEMPERATURES WILL CONTINUE TO SLOWLY FALL THIS MORNING...STRUGGLING TO REACH ABOVE ZERO TODAY WITH MANY AREAS STAYING BETWEEN 5 BELOW ZERO TO ZERO DEGREES. * SNOW ACCUMULATIONS...1 TO 3 INCHES WITH UP TO 4 INCHES NEAR THE FOOTHILLS. * WIND AND VISIBILITY...NORTHWEST WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS WILL COMBINE WITH LIGHT SNOWFALL AND BLOWING SNOW TO OCCASIONALLY REDUCE THE VISIBILITY UNDER ONE HALF MILE IN OPEN AREAS. * IMPACTS...WIND CHILLS WILL FALL TO BETWEEN 25 AND 35 BELOW ZERO TODAY WHICH COULD CAUSE FROSTBITE IN A MATTER OF MINUTES FOR ANY EXPOSED SKIN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ010-011-311830- /O.CON.KRIW.WW.Y.0005.000000T0000Z-110201T0000Z/ NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY- INCLUDING THE CITIES OF...BUFFALO...KAYCEE 259 AM MST MON JAN 31 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...LIGHT SNOW WILL FALL ACROSS THE AREA THROUGH LATE THIS AFTERNOON. TEMPERATURES WILL CONTINUE TO FALL TO BETWEEN 2 BELOW ZERO AND 7 BELOW ZERO OVERNIGHT. TEMPERATURES WILL RANGE FROM ZERO TO 10 BELOW ZERO TODAY. * SNOW ACCUMULATIONS...1 TO 3 INCHES. * WIND AND VISIBILITY...NORTH WINDS WILL INCREASE TO 20 TO 30 MPH LATER TODAY WITH GUSTS TO 40 MPH REDUCING THE VISIBILITY TO UNDER ONE HALF MILE AT TIMES IN BLOWING SNOW. * IMPACTS...WIND CHILLS WILL FALL TO BETWEEN 30 AND 35 BELOW ZERO WHICH COULD CAUSE FROSTBITE IN A MATTER OF MINUTES FOR ANY EXPOSED SKIN. TRAVEL ON INTERSTATE 25 AND 90 WILL ALSO BE IMPACTED SHARPLY REDUCED VISIBILITY AT TIMES IN BLOWING SNOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ005-311830- /O.CON.KRIW.WW.Y.0005.000000T0000Z-110201T0000Z/ SOUTHWEST BIG HORN BASIN- INCLUDING THE CITY OF...THERMOPOLIS 259 AM MST MON JAN 31 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...LIGHT SNOW WILL FALL ACROSS THE AREA THROUGH THIS AFTERNOON. TEMPERATURES WILL STRUGGLE TO REACH ABOVE ZERO TODAY. * SNOW ACCUMULATIONS...2 TO 4 INCHES WITH LOCALLY HIGHER AMOUNTS NEAR THE MOUNTAINS. * WIND AND VISIBILITY...NORTH WIND OF 10 TO 20 MPH WILL CREATE WIND CHILLS OF 15 TO 25 DEGREES BELOW ZERO. * IMPACTS...ROADS MAY BE SLICK AND SNOW COVERED AND WHEN COMBINED WITH THE BITTER COLD TEMPERATURES COULD BE HAZARDOUS FOR ANYONE CAUGHT OUTSIDE FOR MORE THAN A FEW MINUTES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ020-311830- /O.CON.KRIW.WW.Y.0005.000000T0000Z-110201T0000Z/ NATRONA COUNTY LOWER ELEVATIONS- INCLUDING THE CITY OF...CASPER 259 AM MST MON JAN 31 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...LIGHT SNOW WILL FALL ACROSS THE AREA THROUGH THIS AFTERNOON. TEMPERATURES WILL REMAIN NEARLY STEADY FROM 3 BELOW TO 3 ABOVE ZERO. * SNOW ACCUMULATIONS...1 TO 4 INCHES ACROSS THE COUNTY WITH THE HEAVIER AMOUNTS NEAR CASPER AND ALONG THE FOOTHILLS OF CASPER MOUNTAIN. * WIND AND VISIBILITY...NORTH 15 TO 25 MPH WILL OCCASIONALLY REDUCE THE VISIBILITY TO ONE HALF MILE AT TIMES IN OPEN AREAS. * IMPACTS...WIND CHILLS TO 25 BELOW ZERO WILL CREATE A POTENTIAL HAZARD TO ANYONE OUTSIDE FOR MORE THAN A FEW MINUTES. IN ADDITION...AREA ROADS MAY BECOME SNOW COVERED OVERNIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
6 follow-up statements
401 WWUS45 KRIW 311325 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 625 AM MST MON JAN 31 2011 ...BITTER COLD AIRMASS TO ENGULF THE AREA THE NEXT COUPLE DAYS... .AN ARCTIC AIRMASS WILL CONTINUE TO PLUNGE SOUTH ACROSS THE AREA TODAY. BLUSTERY NORTH TO NORTHEAST WINDS ARE EXPECTED TO DEVELOP RESULTING DANGEROUS WIND CHILL VALUES. IN ADDITION...BLOWING SNOW COULD REDUCE VISIBILITY TO AROUND A HALF A MILE AT TIMES. WYZ010-011-010000- /O.CAN.KRIW.WW.Y.0005.000000T0000Z-110201T0000Z/ /O.EXB.KRIW.WC.W.0003.110131T1325Z-110201T1600Z/ NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY- INCLUDING THE CITIES OF...BUFFALO...KAYCEE 625 AM MST MON JAN 31 2011 ...WIND CHILL WARNING IN EFFECT UNTIL 9 AM MST TUESDAY... ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WIND CHILL WARNING...WHICH IS IN EFFECT UNTIL 9 AM MST TUESDAY. THE WINTER WEATHER ADVISORY HAS BEEN CANCELLED. * SUMMARY AND TIMING...OCCASIONAL LIGHT SNOW IS EXPECTED TODAY...BUT ADDITIONAL SNOW ACCUMULATIONS ARE EXPECTED TO BE LESS THAN A HALF AN INCH. HOWEVER...TEMPERATURES ACROSS JOHNSON COUNTY ARE EXPECTED TO REMAIN BETWEEN 5 BELOW...AND 10 BELOW ZERO TODAY...AND THEN FALL OVERNIGHT TO 15 BELOW TO 20 BELOW ZERO. THESE BITTER COLD TEMPERATURES...COMBINED WITH BREEZY NORTH TO NORTHWEST WINDS WILL CREATE DANGEROUS WIND CHILL VALUES * WIND CHILL VALUES...25 BELOW TO 40 BELOW ZERO. * WIND AND VISIBILITY...NORTH TO NORTHWEST WINDS WILL INCREASE TO 20 TO 30 MPH LATER TODAY WITH GUSTS TO 40 MPH RESULTING IN BLOWING SNOW REDUCING THE VISIBILITY AROUND A HALF A MILE AT TIMES. * IMPACTS...WIND CHILLS BETWEEN 25 AND 40 BELOW ZERO COULD CAUSE FROSTBITE IN A MATTER OF MINUTES ON ANY EXPOSED SKIN. TRAVEL ON INTERSTATE 25 AND 90 WILL ALSO BE IMPACTED BY REDUCED VISIBILITY IN BLOWING SNOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ004-311430- /O.CAN.KRIW.WW.Y.0005.000000T0000Z-110131T1800Z/ NORTH BIG HORN BASIN- INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN 625 AM MST MON JAN 31 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE WINTER WEATHER ADVISORY. THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE WINTER WEATHER ADVISORY. ALTHOUGH AREAS OF LIGHT SNOW WILL CONTINUE TODAY...ADDITIONAL SNOWFALL IS EXPECTED TO BE A HALF AN INCH OR LESS. NORTHWEST WINDS ARE EXPECTED TO BECOME STRONGER THIS AFTERNOON...AND LAST THROUGH THE EVENING. THIS WIND COMBINED WITH TEMPERATURES IN THE SINGLE DIGITS OR A FEW DEGREES BELOW ZERO TODAY...WILL RESULT IN WIND CHILLS BETWEEN 15 AND 30 BELOW ZERO. $$ WYZ005-311430- /O.CAN.KRIW.WW.Y.0005.000000T0000Z-110201T0000Z/ SOUTHWEST BIG HORN BASIN- INCLUDING THE CITY OF...THERMOPOLIS 625 AM MST MON JAN 31 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE WINTER WEATHER ADVISORY. THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE WINTER WEATHER ADVISORY. SNOWFALL AMOUNTS AROUND A HALF AN INCH OF SNOW HAS BEEN REPORTED IN THERMOPOLIS...AND ONLY LIGHT SNOW IS EXPECTED THE REMAINDER OF TODAY. ADDITIONAL SNOW ACCUMULATION TODAY IS EXPECTED TO BE A HALF AN INCH OR LESS. TEMPERATURES WILL REMAIN EXTREMELY COLD TODAY...WITH TEMPERATURES HOLDING STEADY IN THE SINGLE DIGITS OR EVEN SLOWLY FALL. $$ WYZ028>030-010000- /O.CON.KRIW.WC.W.0003.110201T0700Z-110201T1600Z/ ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY- INCLUDING THE CITIES OF...ROCK SPRINGS...GREEN RIVER...WAMSUTTER 625 AM MST MON JAN 31 2011 ...WIND CHILL WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MST TUESDAY... A WIND CHILL WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MST TUESDAY. * SUMMARY AND TIMING...AN ARCTIC FRONT WILL MOVE INTO SWEETWATER COUNTY TODAY...WITH NORTHEAST WINDS INCREASING TO 15 TO 30 MPH WITH HIGHER GUSTS. THESE WINDS WILL COMBINE WITH TEMPERATURES OF 15 TO 25 BELOW ZERO TONIGHT TO PRODUCE DANGEROUS WIND CHILLS LATE TONIGHT INTO TUESDAY MORNING. * WIND CHILL VALUES...WIND CHILLS OF 35 TO 45 BELOW ZERO ARE EXPECTED. * IMPACTS...IT WILL BE DANGEROUS TO BE OUTDOORS TONIGHT AND TUESDAY MORNING DUE TO THE VERY LOW WIND CHILLS. FROSTBITE CAN OCCUR ON EXPOSED SKIN IN A VERY SHORT TIME. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ020-010000- /O.CON.KRIW.WW.Y.0005.000000T0000Z-110201T0000Z/ NATRONA COUNTY LOWER ELEVATIONS- INCLUDING THE CITY OF...CASPER 625 AM MST MON JAN 31 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...LIGHT SNOW WILL FALL ACROSS THE AREA THROUGH THIS AFTERNOON. TEMPERATURES WILL REMAIN NEARLY STEADY FROM 3 BELOW TO 3 ABOVE ZERO. * SNOW ACCUMULATIONS...1 TO 3 INCHES ACROSS THE COUNTY WITH THE HEAVIER AMOUNTS NEAR CASPER AND ALONG THE FOOTHILLS OF CASPER MOUNTAIN. * WIND AND VISIBILITY...NORTH 15 TO 25 MPH WILL OCCASIONALLY REDUCE THE VISIBILITY TO ONE HALF MILE AT TIMES IN OPEN AREAS. * IMPACTS...WIND CHILLS TO 25 BELOW ZERO WILL CREATE A POTENTIAL HAZARD TO ANYONE OUTSIDE FOR MORE THAN A FEW MINUTES. IN ADDITION...TRAVEL IN RURAL AREAS COULD BE IMPACTED BY REDUCED VISIBILITY IN BLOWING SNOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ 21
787 WWUS45 KRIW 311601 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 901 AM MST MON JAN 31 2011 ...BITTER COLD AIRMASS TO ENGULF THE AREA THE NEXT COUPLE DAYS... .AN ARCTIC AIRMASS WILL CONTINUE TO PLUNGE SOUTH ACROSS THE AREA TODAY. BLUSTERY NORTH TO NORTHEAST WINDS ARE EXPECTED TO DEVELOP RESULTING DANGEROUS WIND CHILL VALUES. IN ADDITION...BLOWING SNOW COULD REDUCE VISIBILITY TO AROUND A HALF A MILE AT TIMES. WYZ010-011-312315- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1600Z/ NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY- INCLUDING THE CITIES OF...BUFFALO...KAYCEE 901 AM MST MON JAN 31 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 9 AM MST TUESDAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL 9 AM MST TUESDAY. * SUMMARY AND TIMING...FRIGID ARCTIC AIR WILL CONTINUE TO POUR INTO THE AREA THROUGH THE DAY KEEPING TEMPERATURES BELOW ZERO. THE ARCTIC AIR WILL BE USHERED IN ON NORTH WINDS OF 15 TO 25 MPH WITH GUSTS TO 30 MPH. PERIODS OF LIGHT SNOW OR FLURRIES ARE ALSO EXPECTED. * WIND CHILL VALUES...30 BELOW TO 40 BELOW ZERO. * WIND AND VISIBILITY...NORTH 15 TO 25 MPH WITH GUSTS TO 30 MPH. * IMPACTS...WIND CHILLS BETWEEN 30 AND 40 BELOW ZERO COULD CAUSE FROSTBITE IN A MATTER OF MINUTES ON ANY EXPOSED SKIN. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND TODAY IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ028>030-312315- /O.CON.KRIW.WC.W.0003.110201T0700Z-110201T1600Z/ ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY- INCLUDING THE CITIES OF...ROCK SPRINGS...GREEN RIVER...WAMSUTTER 901 AM MST MON JAN 31 2011 ...WIND CHILL WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MST TUESDAY... A WIND CHILL WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MST TUESDAY. * SUMMARY AND TIMING...AN ARCTIC FRONT WILL MOVE INTO SWEETWATER COUNTY TODAY...WITH NORTHEAST WINDS INCREASING TO 15 TO 30 MPH WITH HIGHER GUSTS. THESE WINDS WILL COMBINE WITH TEMPERATURES OF 15 TO 25 BELOW ZERO TONIGHT TO PRODUCE DANGEROUS WIND CHILLS LATE TONIGHT INTO TUESDAY MORNING. * WIND CHILL VALUES...WIND CHILLS OF 35 TO 45 BELOW ZERO ARE EXPECTED. * IMPACTS...IT WILL BE DANGEROUS TO BE OUTDOORS TONIGHT AND TUESDAY MORNING DUE TO THE VERY LOW WIND CHILLS. FROSTBITE CAN OCCUR ON EXPOSED SKIN IN A VERY SHORT TIME. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ020-312315- /O.CON.KRIW.WW.Y.0005.000000T0000Z-110201T0000Z/ NATRONA COUNTY LOWER ELEVATIONS- INCLUDING THE CITY OF...CASPER 901 AM MST MON JAN 31 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...FRIGID ARCTIC AIR WILL CONTINUE TO POUR INTO THE AREA THROUGH THE DAY KEEPING THE TEMPERATURE BELOW ZERO. THE ARCTIC AIR WILL BE USHERED IN ON NORTH WINDS OF 10 TO 20 MPH. PERIODS OF LIGHT SNOW OR FLURRIES ARE ALSO EXPECTED. SNOWFALL REPORTS AROUND THE AREA VARIED FROM 1 TO NEARLY 3 INCHES SINCE LAST NIGHT. * SNOW ACCUMULATIONS...NEW ACCUMULATIONS WILL GENERALLY BE UNDER AN INCH. * WIND AND VISIBILITY...NORTH 10 TO 20 MPH WITH LOCALLY HIGHER GUSTS IN OPEN AREAS PRODUCING LOCALIZED BLOWING SNOW AND VISIBILITIES DOWN TO ONE HALF MILE. * IMPACTS...WIND CHILLS TO 25 BELOW ZERO WILL CREATE A POTENTIAL HAZARD TO ANYONE OUTSIDE FOR MORE THAN A FEW MINUTES. IN ADDITION...TRAVEL IN RURAL AREAS COULD BE IMPACTED BY REDUCED VISIBILITY IN BLOWING SNOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ SKRBAC
690 WWUS45 KRIW 312101 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 201 PM MST MON JAN 31 2011 ...BITTER COLD AIRMASS TO ENGULF THE AREA THE NEXT COUPLE DAYS... .ARCTIC AIR WILL STRENGTHEN OVER THE AREA TONIGHT INTO TUESDAY MORNING. BLUSTERY NORTH TO NORTHEAST WINDS WILL CREATE DANGEROUS WIND CHILL VALUES. WYZ020-010700- /O.CAN.KRIW.WW.Y.0005.000000T0000Z-110201T0000Z/ /O.EXB.KRIW.WC.W.0003.110201T0000Z-110201T1900Z/ NATRONA COUNTY LOWER ELEVATIONS- INCLUDING THE CITY OF...CASPER 201 PM MST MON JAN 31 2011 ...WIND CHILL WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO NOON MST TUESDAY... ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WIND CHILL WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO NOON MST TUESDAY. THE WINTER WEATHER ADVISORY HAS BEEN CANCELLED. * SUMMARY AND TIMING...FRIGID ARCTIC AIR WILL CONTINUE TO POUR INTO THE AREA THROUGH TONIGHT. THE ARCTIC AIR WILL BE USHERED IN ON NORTH WINDS OF 10 TO 20 MPH. OCCASIONAL FLURRIES OR VERY LIGHT SNOW IS EXPECTED WITH LITTLE ADDITIONAL SNOWFALL. SNOWFALL REPORTS AROUND THE AREA VARIED FROM 1 TO NEARLY 3 INCHES SINCE LAST NIGHT. * SNOW ACCUMULATIONS...LITTLE ADDITIONAL. * WIND AND VISIBILITY...NORTH 10 TO 20 MPH WITH LOCALLY HIGHER GUSTS IN OPEN AREAS PRODUCING LOCALIZED BLOWING SNOW AND VISIBILITIES DOWN TO ONE HALF MILE. * IMPACTS...WIND CHILLS DECREASING TO 25 TO 35 BELOW ZERO WILL CREATE A POTENTIAL HAZARD TO ANYONE OUTSIDE FOR MORE THAN A FEW MINUTES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ019-010700- /O.EXB.KRIW.WC.W.0003.110201T0000Z-110201T1900Z/ GREEN MOUNTAINS AND RATTLESNAKE RANGE- INCLUDING THE CITY OF...JEFFREY CITY 201 PM MST MON JAN 31 2011 ...WIND CHILL WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO NOON MST TUESDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WIND CHILL WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO NOON MST TUESDAY. * SUMMARY AND TIMING...FRIGID ARCTIC AIR WILL CONTINUE TO POUR INTO THE AREA THROUGH TONIGHT. THE ARCTIC AIR WILL BE USHERED IN ON NORTH WINDS OF 15 TO 25 MPH. OCCASIONAL FLURRIES OR VERY LIGHT SNOW IS EXPECTED WITH LITTLE ADDITIONAL SNOWFALL. * WIND CHILL VALUES...30 BELOW TO 40 BELOW ZERO. * WIND AND VISIBILITY...NORTH 15 TO 25 MPH WITH GUSTS TO 30 MPH. * IMPACTS...WIND CHILLS BETWEEN 30 AND 40 BELOW ZERO COULD CAUSE FROSTBITE IN A MATTER OF MINUTES ON ANY EXPOSED SKIN. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH TUESDAY MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ004-010700- /O.EXB.KRIW.WC.W.0003.110201T0000Z-110201T1900Z/ NORTH BIG HORN BASIN- INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN 201 PM MST MON JAN 31 2011 ...WIND CHILL WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO NOON MST TUESDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WIND CHILL WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO NOON MST TUESDAY. * SUMMARY AND TIMING...FRIGID ARCTIC AIR WILL CONTINUE TO POUR INTO THE AREA THROUGH TONIGHT. THE ARCTIC AIR WILL BE USHERED IN ON NORTH WINDS OF 15 TO 25 MPH. * WIND CHILL VALUES...25 BELOW TO 35 BELOW ZERO. * WIND AND VISIBILITY...NORTH 15 TO 25 MPH WITH GUSTS TO 30 MPH. * IMPACTS...WIND CHILLS BETWEEN 25 AND 35 BELOW ZERO COULD CAUSE FROSTBITE IN A MATTER OF MINUTES ON ANY EXPOSED SKIN. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH TUESDAY MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ006-010700- /O.EXB.KRIW.WC.W.0003.110201T0000Z-110201T1900Z/ SOUTHEAST BIG HORN BASIN- INCLUDING THE CITY OF...WORLAND 201 PM MST MON JAN 31 2011 ...WIND CHILL WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO NOON MST TUESDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WIND CHILL WARNING...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO NOON MST TUESDAY. * SUMMARY AND TIMING...FRIGID ARCTIC AIR WILL CONTINUE TO POUR INTO THE AREA THROUGH TONIGHT. THE ARCTIC AIR WILL BE USHERED IN ON NORTH WINDS OF 10 TO 25 MPH. * WIND CHILL VALUES...25 BELOW TO 35 BELOW ZERO. * WIND AND VISIBILITY...NORTH 10 TO 20 MPH WITH GUSTS TO 25 MPH. * IMPACTS...WIND CHILLS BETWEEN 25 AND 35 BELOW ZERO COULD CAUSE FROSTBITE IN A MATTER OF MINUTES ON ANY EXPOSED SKIN. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH TUESDAY MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ010-011-010700- /O.EXT.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY- INCLUDING THE CITIES OF...BUFFALO...KAYCEE 201 PM MST MON JAN 31 2011 ...WIND CHILL WARNING NOW IN EFFECT UNTIL NOON MST TUESDAY... THE WIND CHILL WARNING IS NOW IN EFFECT UNTIL NOON MST TUESDAY. * SUMMARY AND TIMING...FRIGID ARCTIC AIR WILL CONTINUE TO POUR INTO THE AREA THROUGH TONIGHT. THE ARCTIC AIR WILL BE USHERED IN ON NORTH WINDS OF 15 TO 25 MPH. OCCASIONAL FLURRIES OR VERY LIGHT SNOW IS EXPECTED WITH LITTLE ADDITIONAL SNOWFALL. SNOWFALL REPORTS AROUND THE AREA VARIED FROM 1 TO NEARLY 3 INCHES SINCE LAST NIGHT. * WIND CHILL VALUES...30 BELOW TO 40 BELOW ZERO. * WIND AND VISIBILITY...NORTH 15 TO 25 MPH WITH GUSTS TO 30 MPH. * IMPACTS...WIND CHILLS BETWEEN 30 AND 40 BELOW ZERO COULD CAUSE FROSTBITE IN A MATTER OF MINUTES ON ANY EXPOSED SKIN. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH TUESDAY MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ028>030-010700- /O.EXT.KRIW.WC.W.0003.110201T0300Z-110201T1900Z/ ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY- INCLUDING THE CITIES OF...ROCK SPRINGS...GREEN RIVER...WAMSUTTER 201 PM MST MON JAN 31 2011 ...WIND CHILL WARNING NOW IN EFFECT FROM 8 PM THIS EVENING TO NOON MST TUESDAY... THE WIND CHILL WARNING IS NOW IN EFFECT FROM 8 PM THIS EVENING TO NOON MST TUESDAY. * SUMMARY AND TIMING...AN ARCTIC FRONT WILL MOVE WESTWARD THROUGH SWEETWATER COUNTY THROUGH THIS EVENING...WITH NORTHEAST WINDS INCREASING TO 15 TO 30 MPH WITH HIGHER GUSTS. THESE WINDS WILL COMBINE WITH TEMPERATURES OF 10 TO 20 BELOW ZERO TONIGHT TO PRODUCE DANGEROUS WIND CHILLS LATE TONIGHT INTO TUESDAY MORNING. * WIND CHILL VALUES...WIND CHILLS OF 30 TO 40 BELOW ZERO ARE EXPECTED. * IMPACTS...IT WILL BE DANGEROUS TO BE OUTDOORS TONIGHT AND TUESDAY MORNING DUE TO THE VERY LOW WIND CHILLS. FROSTBITE CAN OCCUR ON EXPOSED SKIN IN A VERY SHORT TIME. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ SKRBAC
748 WWUS45 KRIW 010439 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 939 PM MST MON JAN 31 2011 ...BITTER COLD AIRMASS TO ENGULF THE AREA... .ARCTIC AIR WILL STRENGTHEN OVERNIGHT INTO TUESDAY MORNING. BLUSTERY NORTH TO NORTHEAST WINDS WILL CREATE DANGEROUS WIND CHILL VALUES. WYZ010-011-011900- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY- INCLUDING THE CITIES OF...BUFFALO...KAYCEE 939 PM MST MON JAN 31 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TUESDAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TUESDAY. * SUMMARY AND TIMING...AIR TEMPERATURES WILL RANGE FROM 15 BELOW ZERO TO 21 BELOW ZERO THROUGH THE MORNING HOURS. THIS COMBINED WITH THE WIND WILL CREATE DANGEROUS WIND CHILL VALUES THROUGH THE MORNING HOURS. * WIND CHILL VALUES...30 BELOW ZERO TO 40 BELOW ZERO. * WIND...NORTH 10 TO 20 MPH. * IMPACTS...FROSTBITE MAY OCCUR IN A MATTER OF MINUTES ON ANY EXPOSED SKIN. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ028>030-011900- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY- INCLUDING THE CITIES OF...ROCK SPRINGS...GREEN RIVER...WAMSUTTER 939 PM MST MON JAN 31 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TUESDAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TUESDAY. * SUMMARY AND TIMING...TEMPERATURES WILL RANGE FROM 3 BELOW TO 13 BELOW ZERO THROUGH THE MORNING HOURS. THIS COMBINED WITH GUSTY WIND TO PRODUCE DANGEROUS WIND CHILLS VALUES. * WIND CHILL VALUES...30 TO 40 BELOW ZERO. * WIND...NORTHEAST AT 20 TO 30 MPH WITH GUSTS AROUND 35 MPH. * IMPACTS...FROSTBITE CAN OCCUR ON EXPOSED SKIN IN A VERY SHORT TIME. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ020-011900- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ NATRONA COUNTY LOWER ELEVATIONS- INCLUDING THE CITY OF...CASPER 939 PM MST MON JAN 31 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TUESDAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TUESDAY. * SUMMARY AND TIMING...TEMPERATURES WILL RANGE FROM 12 BELOW TO 22 BELOW ZERO THROUGH THE MORNING HOURS. THIS COMBINED WITH WIND WILL CREATE DANGEROUS WIND CHILL VALUES. * WIND CHILL VALUES...30 TO 40 DEGREES BELOW ZERO. * WIND...NORTH 10 TO 15 MPH WITH LOCALLY HIGHER GUSTS IN OPEN AREAS. * IMPACTS...FROSTBITE CAN OCCUR ON EXPOSED SKIN IN A VERY SHORT TIME. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ019-011900- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ GREEN MOUNTAINS AND RATTLESNAKE RANGE- INCLUDING THE CITY OF...JEFFREY CITY 939 PM MST MON JAN 31 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TUESDAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TUESDAY. * SUMMARY AND TIMING...TEMPERATURES WILL RANGE FROM 10 BELOW TO 15 BELOW ZERO THROUGH THE MORNING HOURS. THIS COMBINED WITH WIND WILL CREATE DANGEROUS WIND CHILL VALUES. * WIND CHILL VALUES...30 BELOW TO 40 BELOW ZERO. * WIND...NORTH TO NORTHEAST 15 TO 20 MPH. * IMPACTS...FROSTBITE CAN OCCUR IN A MATTER OF MINUTES ON ANY EXPOSED SKIN. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ004-011900- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ NORTH BIG HORN BASIN- INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN 939 PM MST MON JAN 31 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TUESDAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TUESDAY. * SUMMARY AND TIMING...TEMPERATURES WILL RANGE FROM 10 BELOW TO 18 BELOW ZERO THROUGH THE MORNING HOURS. THIS COMBINED WITH WIND WILL CREATE DANGEROUS WIND CHILL VALUES. * WIND CHILL VALUES...25 BELOW TO 35 BELOW ZERO. * WIND...NORTH TO NORTHWEST AT 10 TO 20 MPH. * IMPACTS...FROSTBITE CAN OCCUR IN A MATTER OF MINUTES ON ANY EXPOSED SKIN. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ006-011900- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ SOUTHEAST BIG HORN BASIN- INCLUDING THE CITY OF...WORLAND 939 PM MST MON JAN 31 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TUESDAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TUESDAY. * SUMMARY AND TIMING...TEMPERATURES WILL RANGE FROM 13 BELOW TO 20 BELOW ZERO THROUGH THE MORNING HOURS. THIS COMBINED WITH A LIGHT WIND WILL CREATE DANGEROUS WIND CHILL VALUES. * WIND CHILL VALUES...25 BELOW TO 35 BELOW ZERO. * WIND...AROUND 10 MPH. * IMPACTS...FROSTBITE MAY OCCUR IN A MATTER OF MINUTES ON ANY EXPOSED SKIN. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ AR
545 WWUS45 KRIW 011253 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 553 AM MST TUE FEB 1 2011 ...DANGEROUS WIND CHILLS THIS MORNING... .AN ARCTIC AIRMASS SETTLED INTO WYOMING THIS MORNING WITH MOST TEMPERATURES IN THE 10 BELOW TO 20 BELOW ZERO RANGE EARLY THIS MORNING. THESE TEMPERATURES COMBINED WITH AREAS OF GUSTY NORTHEAST WIND WILL CREATE DANGEROUS WIND CHILL VALUES IN WHICH FROSTBITE TO EXPOSED SKIN CAN OCCUR IN 15 MINUTES OR LESS. WYZ010-011-011900- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY- INCLUDING THE CITIES OF...BUFFALO...KAYCEE 553 AM MST TUE FEB 1 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY. * SUMMARY AND TIMING...AIR TEMPERATURES WILL RANGE FROM 15 BELOW ZERO TO 21 BELOW ZERO THROUGH THE MORNING HOURS. THIS COMBINED WITH THE WIND WILL CREATE DANGEROUS WIND CHILL VALUES THROUGH THE MORNING HOURS. * WIND CHILL VALUES...30 BELOW ZERO TO 40 BELOW ZERO. * WIND...NORTH 10 TO 15 MPH. * IMPACTS...FROSTBITE MAY OCCUR IN 15 MINUTES OR LESS ON ANY EXPOSED SKIN IN THESE CONDITIONS. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ028>030-011900- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY- INCLUDING THE CITIES OF...ROCK SPRINGS...GREEN RIVER...WAMSUTTER 553 AM MST TUE FEB 1 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY. * SUMMARY AND TIMING...TEMPERATURES WILL RANGE FROM 5 BELOW TO NEAR 20 BELOW ZERO THROUGH THE MORNING HOURS. THIS COMBINED WITH GUSTY WIND TO PRODUCE DANGEROUS WIND CHILLS VALUES. * WIND CHILL VALUES...30 TO 45 BELOW ZERO. * WIND...NORTHEAST AT 20 TO 35 MPH WITH GUSTS 35 TO 45 MPH. * IMPACTS...FROSTBITE CAN OCCUR ON EXPOSED SKIN IN 10 MINUTES OR LESS IN THESE CONDITIONS. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ020-011900- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ NATRONA COUNTY LOWER ELEVATIONS- INCLUDING THE CITY OF...CASPER 553 AM MST TUE FEB 1 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY. * SUMMARY AND TIMING...TEMPERATURES WILL RANGE FROM 12 BELOW TO 22 BELOW ZERO THROUGH THE MORNING HOURS. THIS COMBINED WITH WIND WILL CREATE DANGEROUS WIND CHILL VALUES. * WIND CHILL VALUES...30 TO 40 DEGREES BELOW ZERO. * WIND...NORTH 10 TO 15 MPH WITH LOCALLY HIGHER GUSTS IN OPEN AREAS. * IMPACTS...FROSTBITE CAN OCCUR ON EXPOSED SKIN IN 15 MINUTES OR LESS IN THESE CONDITIONS. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ019-011900- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ GREEN MOUNTAINS AND RATTLESNAKE RANGE- INCLUDING THE CITY OF...JEFFREY CITY 553 AM MST TUE FEB 1 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY. * SUMMARY AND TIMING...TEMPERATURES WILL RANGE FROM 10 BELOW TO 15 BELOW ZERO THROUGH THE MORNING HOURS. THIS COMBINED WITH WIND WILL CREATE DANGEROUS WIND CHILL VALUES. * WIND CHILL VALUES...30 BELOW TO 40 BELOW ZERO. * WIND...NORTH TO NORTHEAST 10 TO 20 MPH. * IMPACTS...FROSTBITE CAN OCCUR IN 15 MINUTES OR LESS ON ANY EXPOSED SKIN IN THESE CONDITIONS. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ004-011900- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ NORTH BIG HORN BASIN- INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN 553 AM MST TUE FEB 1 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY. * SUMMARY AND TIMING...TEMPERATURES WILL RANGE FROM 10 BELOW TO 18 BELOW ZERO THROUGH THE MORNING HOURS. THIS COMBINED WITH WIND WILL CREATE DANGEROUS WIND CHILL VALUES. * WIND CHILL VALUES...25 BELOW TO 35 BELOW ZERO. * WIND...NORTH TO NORTHWEST AT 10 TO 20 MPH. * IMPACTS...FROSTBITE CAN OCCUR IN 15 MINUTES OR LESS ON ANY EXPOSED SKIN IN THESE CONDITIONS. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ006-011900- /O.CON.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ SOUTHEAST BIG HORN BASIN- INCLUDING THE CITY OF...WORLAND 553 AM MST TUE FEB 1 2011 ...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY... A WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON MST TODAY. * SUMMARY AND TIMING...TEMPERATURES WILL RANGE FROM 13 BELOW TO 20 BELOW ZERO THROUGH THE MORNING HOURS. THIS COMBINED WITH A LIGHT WIND WILL CREATE DANGEROUS WIND CHILL VALUES. * WIND CHILL VALUES...25 BELOW TO 35 BELOW ZERO. * WIND...AROUND 10 MPH. * IMPACTS...FROSTBITE MAY OCCUR IN 15 MINUTES OR LESS ON ANY EXPOSED SKIN IN THESE CONDITIONS. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ AEM
700 WWUS45 KRIW 011910 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 1210 PM MST TUE FEB 1 2011 WYZ028>030-020700- /O.EXP.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ /O.NEW.KRIW.WC.W.0004.110201T1910Z-110202T1500Z/ ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY- INCLUDING THE CITIES OF...ROCK SPRINGS...GREEN RIVER...WAMSUTTER 1210 PM MST TUE FEB 1 2011 ...WIND CHILL WARNING IN EFFECT UNTIL 8 AM MST WEDNESDAY... ...WIND CHILL WARNING HAS EXPIRED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WIND CHILL WARNING...WHICH IS IN EFFECT UNTIL 8 AM MST WEDNESDAY. THE WIND CHILL WARNING IS NO LONGER IN EFFECT. * SUMMARY AND TIMING...DANGEROUS WIND CHILLS WILL CONTINUE INTO WEDNESDAY MORNING AS DAYTIME HIGHS BELOW ZERO PLUMMET TO BETWEEN 15 AND 25 BELOW ZERO TONIGHT. * WIND CHILL VALUES...30 TO 45 BELOW ZERO. * WIND...NORTHEAST AT 20 TO 30 MPH WITH GUSTS 35. * IMPACTS...FROSTBITE CAN OCCUR ON EXPOSED SKIN IN 10 MINUTES OR LESS IN THESE CONDITIONS. PLEASE BRING EMERGENCY GEAR IF TRAVELLING AROUND THROUGH THE MORNING IN CASE YOUR VEHICLE BREAKS DOWN IN THIS FRIGID ARCTIC AIR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ WYZ004-006-010-011-019-020-012015- /O.EXP.KRIW.WC.W.0003.000000T0000Z-110201T1900Z/ NORTH BIG HORN BASIN-SOUTHEAST BIG HORN BASIN- NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY- GREEN MOUNTAINS AND RATTLESNAKE RANGE- NATRONA COUNTY LOWER ELEVATIONS- INCLUDING THE CITIES OF...POWELL...LOVELL...GREYBULL...BASIN... WORLAND...BUFFALO...KAYCEE...JEFFREY CITY...CASPER 1210 PM MST TUE FEB 1 2011 ...WIND CHILL WARNING HAS EXPIRED... THE WIND CHILL WARNING IS NO LONGER IN EFFECT. WINDS HAVE DECREASED AND TEMPERATURES HAVE WARMED ENOUGH TO ALLOW THE WIND CHILL WARNING FOR THE AREA TO EXPIRE. $$ WYZ014-020700- /O.NEW.KRIW.WC.W.0004.110201T1910Z-110202T1500Z/ WIND RIVER MOUNTAINS WEST- 1210 PM MST TUE FEB 1 2011 ...WIND CHILL WARNING IN EFFECT UNTIL 8 AM MST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WIND CHILL WARNING...WHICH IS IN EFFECT UNTIL 8 AM MST WEDNESDAY. * SUMMARY AND TIMING...STRONG NORTHEAST WINDS WILL COMBINE WITH TEMPERATURES OF 5 TO 20 BELOW ZERO TO CREATE DANGEROUS WIND CHILLS INTO WEDNESDAY MORNING. * WIND CHILL VALUES...35 TO 45 BELOW ZERO. * IMPACTS...TRAVELLERS OVER SOUTH PASS SHOULD KEEP EMERGENCY GEAR IN THEIR VEHICLE IN CASE THEY BECOME STRANDED. FROSTBITE CAN OCCUR IN UNDER 10 MINUTES TO ANY EXPOSED SKIN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND CHILL WARNING MEANS THE COMBINATION OF VERY COLD AIR AND STRONG WINDS WILL CREATE DANGEROUSLY LOW WIND CHILL VALUES. THIS WILL RESULT IN FROST BITE AND LEAD TO HYPOTHERMIA OR DEATH IF PRECAUTIONS ARE NOT TAKEN. && $$ TEAM RIVERTON
What forecasters said that day
The local office's own words before this wind chill 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 wind chill warning went out at Jan 30, 2:43 PM MST, 12 hours 16 minutes earlier.
Area forecast discussion, Jan 30, 2:43 PM MST, 12 hours 16 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RIVERTON WY 243 PM MST SUN JAN 30 2011 SHORT TERM...TONIGHT THROUGH WEDNESDAY ARCTIC COLD FRONT IS MAKING ITS WAY SLOWLY SWD TODAY AS EXPECTED. LIGHT SNOW IS DEVELOPING WITHIN A FEW HOURS OF FROPA. ONE SURPRISE TODAY WAS THE AMOUNT OF MOISTURE AND WEAK INSTABILITY THAT IS AIDING IN SNOW SHOWERS OVER SW MTNS OVER TO SOUTH PASS. WE WILL NEED TO WATCH THE SW TONIGHT WITH THE UT VORT MAX/LEAF WHICH THE GFS BRINGS PARTIALLY INTO SRN AND SERN SWEETWATER LATER THIS EVENING FOR A QUICK SHOT OF SNOW IN ADVANCE OF THE ARCTIC FRONT. INCREASED POPS TO LIKELY IN THIS AREA AFTER 06Z. OTHERWISE...ARCTIC AIR WILL BECOME MORE AND MORE ENTRENCHED ACROSS THE NORTH OVERNIGHT AND GRADUALLY SAG FURTHER AND FURTHER SOUTH INTO CENTRAL WYOMING AND EVEN THE NRN RED DESERT OVERNIGHT. SHORTWAVE SPINNING OVER SERN ALBERTA IS PROBABLY A TAD SLOWER THAN THE MODELS. SECONDARY WAVE SEEN MUCH FURTHER NORTH IS ALSO POISED TO DROP DOWN IN THE SLY FLOW AND CONTINUE MODEL IDEA OF DRAGGING THE UPPER LEVEL FLOW FURTHER AND FURTHER WEST. LARGE AREA OF -40 TO -49C AIR AT H5 ACROSS CNTRL AND NRL CANADA HEADED SOUTH THIS MORNING. SURFACE TEMPS WERE IN THE -30 TO -45C RANGE THIS MORNING...EVEN AS FAR SOUTH AS NRN ALBERTA. GFS IS STILL THE "WARMER" MODEL WITH H7 TEMPS ONLY DROPPING TO -26C AT H7 BY TUE MORNING WITH THE NAM IS THE COLDEST WITH -30 TO -33C WITH THE ECMWF IN THE MIDDLE AT -29C OR SO. A QUICK PEEK AT THE 18Z NAM IS ALSO NOW SHOWING A BAND OF SNOW MOVING OFF THE UINTAS AND INTO SCNTRL AND SERN SWEETWATER MAINLY AFTER 06Z TONIGHT. WILL HIT THIS AREA HARDER YET AND LET THE EVEN CREW SEE IF WE NEED A SHORT TERM ADVISORY THAT WOULD CARRY OVER INTO POST ARCTIC FROPA ON MONDAY. WE WILL BE ISSUING SEVERAL WINTER HIGHLIGHTS ACROSS THE NRN AND CNTRL ZONES FOR TONIGHT AND MONDAY DUE TO LIGHT SNOW...GUSTY N WIND...WIND CHILLS OF -20 TO -35 AND AREAS OF BLOWING SNOW. NRN AND ERN JOHNSON COUNTY WILL LIKELY SEE INCREASING NORTH WINDS OVERNIGHT INTO MONDAY MORNING WITH SPEEDS OF 25 TO 35 MPH EXPECTED WITH HIGHER GUSTS. GUSTY N-NW WINDS WILL ALSO BLOW THE SNOW AROUND THE BIGHORN BASIN AND CAUSE BITTER COLD WIND CHILLS. WE DON'T HAVE JUST THE ARCTIC COLD FRONT TO CONTEND WITH BUT THE POTENTIAL FOR RIGHT ENTRANCE REGION JET STREAK DYNAMICS SPREADING ACROSS THE NORTH OVERNIGHT AND CONTINUING INTO MONDAY...ESPECIALLY THE CNTRL AND ERN SECTIONS. SOME MODERATE QG FORCING IS ALSO FORECAST TO DEVELOP LATE TONIGHT AND PEAK LATE MONDAY OVER CENTRAL WYO. GFS CONTINUES TO HIT THP WITH SOME DECENT SNOWFALL OVERNIGHT INTO MONDAY MORNING SO HOISTED A WINTER WX ADVISORY THERE FOR SNOWFALL OF 2-4 INCHES WITH LOCALLY HIGHER AMOUNTS. OTHER HIGHLIGHTS WILL LIKELY BE NEEDED FURTHER SOUTH MONDAY INTO MONDAY NIGHT FOR A COMBINATION OF LIGHT SNOW...GUSTY N-NE WINDS...WIND CHILLS AS COLD AS -40 IN THE RED DESERT AND HIGHER TERRAIN IN ERN FREMONT AND SRN NATRONA. BITTER COLD AIR WILL BECOME ENTRENCHED ACROSS THE AREA MONDAY NIGHT THROUGH TUESDAY NIGHT WITH LOWS OF 15 TO 20 BELOW ZERO WILL BE COMMON MONDAY NIGHT EAST OF THE DIVIDE AND 20 TO 30 BELOW OUT WEST. TUESDAY NIGHT WILL LIKELY BE COLDER YET WITH LOWS OF 15 TO 25 BELOW EAST OF THE DIVIDE WITH LOW LYING AREAS POSSIBLY HITTING 30 BELOW. THE WEST WILL SEE 25 TO 35 BELOW ZERO WITH 40 BELOW EXPECTED IN YNP. TEMPERATURES WILL BEGIN TO MODERATE IN THE MOUNTAINS SOME WEDNESDAY WITH THE BASINS AND VALLEYS REMAINING TRAPPED. A SHARP RETURN TO WINTER IS FAST APPROACHING. LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY THE BIGGEST CHALLENGES IN THE EXTENDED ARE HOW QUICKLY THE ARCTIC AIR MASS WILL MODIFY...AND THE POTENTIAL OF QUICK MOVING CLIPPER SYSTEMS IN NORTHWEST FLOW AFFECTING THE FORECAST AREA LATE THIS WEEK. THE STORM IN THE SHORT TERM WILL CONTINUE TO MOVE AWAY FROM THE AREA...WITH A FOLD OVER RIDGE TAKING HOLD OVER THE NORTHERN ROCKIES WEDNESDAY. MEDIUM RANGE MODELS THEN SHOW THE PATTERN TRANSITIONING TO A NORTHWEST FLOW THURSDAY/FRIDAY WITH THE POTENTIAL FOR A COUPLE OF CLIPPER SYSTEMS IN THE FLOW. THE 00Z SUITE OF GUIDANCE IS SUGGESTING THE BEST TIMING OF THE STRONGEST CLIPPER SYSTEM WOULD PROBABLY OCCUR IN THE FRIDAY NIGHT THROUGH SATURDAY NIGHT TIME FRAME. HAVE GONE MAINLY DRY WEDNESDAY THROUGH FRIDAY...WITH BROAD BRUSH LOW POPS WITH AN EMPHASIS IN THE NORTHWEST/NORTHERN MOUNTAINS FRIDAY NIGHT THROUGH SATURDAY NIGHT. TEMPERATURES WILL BE TRICKY...BUT CONTINUED ON THE COOL SIDE OF GUIDANCE THROUGH THURSDAY...ESPECIALLY IN TRAPPED BASINS AND VALLEYS. WARMING TEMPERATURES TO MAINLY SEASONAL READINGS ARE EXPECTED BY FRIDAY...BUT A COLD FRONT FRIDAY NIGHT/SATURDAY COULD SEND TEMPERATURES BACK TO SLIGHTLY BELOW AVERAGE VALUES. TEMPERATURES BEHIND THIS COLD FRONT WILL NOT BE NEARLY AS COLD AS THE FRONT MOVING ACROSS THE AREA TODAY AND MONDAY. AVIATION... LOW CLOUDS AND AREAS OF LIGHT SNOW WILL CONTINUE OVER NORTHERN WY THROUGH MON MORNING WITH MVFR TO LIFR CONDITIONS FROM YNP TO NEAR KWRL TO KCPR. AS COLD AIR PUSHES SOUTH IN THE LOW CLOUDS AND LIGHT SNOW WILL SLIDE SOUTH AS WELL WITH MVFR CONDITIONS PREVAILING WITH OCCASIONAL IFR CEILINGS. AFTER 00Z THE LOW CLOUDS AND AREAS OF LIGHT SNOW WILL PUSH INTO CENTRAL WY WITH MVFR CONDITIONS PREVAILING BY 06Z AND CONTINUING INTO MON MORNING WITH OCCASIONAL IFR CONDITIONS...ESPECIALLY FROM KLND TO KCPR. VERY COLD AIR WILL FILTER IN FROM NORTH TO SOUTH BEHIND THE SNOW AND BRING IN AREAS OF FOG AND LOW STRATUS WITH A FEW AREAS OF FLURRIES EMBEDDED. WEST OF THE DIVIDE VFR CONDITIONS WILL OCCUR IN MOST PLACES INTO THE EVENING. SNOW WILL BE ON THE INCREASE WITH MVFR CONDITIONS BREAKING OUT OVERNIGHT FROM KAFO TO YNP. IN THE SOUTH AND SOUTHWEST VFR CONDITIONS WILL OCCUR INTO THE EVENING WITH MVFR TO IFR CONDITIONS MOVING IN MON MORNING...THIS WOULD INCLUDE KBPI...KPNA...AND KRKS TERMINAL SITES. FIRE WEATHER... BITTER COLD AIRMASS TO ENGULF THE AREA OVER THE NEXT 12-24 HOURS WITH THE COLDEST AIR ARRIVING MONDAY NIGHT INTO TUESDAY. LIGHT SNOW ...GUSTY NORTH TO NORTHWEST WIND...BITTER COLD WIND CHILLS AND AREAS OF BLOWING SNOW WILL ALSO ACCOMPANY THIS SYSTEM. && .RIW WATCHES/WARNINGS/ADVISORIES... WINTER WEATHER ADVISORY UNTIL 5 PM MST MONDAY WYZ010-011-020. WINTER WEATHER ADVISORY UNTIL 5 PM MST MONDAY WYZ005. WINTER WEATHER ADVISORY UNTIL 11 AM MST MONDAY WYZ004. && SHORT TERM...SKRBAC LONG TERM...WM AVIATION...ALLEN FIRE WEATHER...SKRBAC
Hazardous weather outlook, Jan 30, 3:41 PM MST, 11 hours 18 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 341 PM MST SUN JAN 30 2011 WYZ001>020-022>030-311200- 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- 341 PM MST SUN JAN 30 2011 ...WINTER WEATHER ADVISORIES COVER PART OF NORTHCENTRAL AND CENTRAL WYOMING TONIGHT AND MONDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING. .DAY ONE...TODAY AND TONIGHT AN ARCTIC COLD FRONT WILL PUSH THROUGH ALL OF CENTRAL WYOMING TONIGHT AND INTO THE NORTHERN PART OF THE RED DESERT. THE ARCTIC FRONT WILL BE ACCOMPANIED BY LIGHT SNOW...GUSTY NORTH WINDS...AREAS OF BLOWING SNOW AND BITTER COLD WIND CHILLS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY COLDER AND COLDER AIR WILL FILTER INTO WESTERN AND CENTRAL WYOMING MONDAY THROUGH TUESDAY. THE COMBINATION OF LIGHT SNOW...GUSTY NORTH TO NORTHEAST WIND...AREAS OF BLOWING SNOW AND BITTER COLD WIND CHILLS WILL CREATE POTENTIALLY HAZARDOUS WEATHER CONDITIONS. WIND CHILLS WILL CONTINUE TO FALL THROUGH MONDAY NIGHT. WIND CHILLS OF 10 TO 25 BELOW ZERO WILL BE COMMON MONDAY AND 30 TO 40 BELOW ZERO MONDAY NIGHT. SWEETWATER COUNTY...INCLUDING THE INTERSTATE 80 CORRIDOR...COULD BE SIGNIFICANTLY IMPACTED BY STRONG NORTHEAST WINDS COMBINING WITH LIGHT SNOWFALL AND WIND CHILLS OF 40 TO 50 BELOW ZERO MONDAY NIGHT AND TUESDAY MORNING. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT SNOWFALL AMOUNTS OVERNIGHT AND ANY WIND GUSTS OVER 40 MPH. TEAM RIVERTON
Nearby
Wind Chill Warnings in Wyoming, 2011Every wind chill warning in 2011
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.