Alert archive / Wyoming / Winter Storm Warnings in 2011
Winter Storm Warning 10, NWS Riverton, WY
NWS Riverton, WY issued this winter storm warning at Oct 6, 2011, 3:01 PM MDT for 5 counties in Wyoming. It took effect at Oct 6, 2011, 9:00 PM MDT. It was in force for 15 hr. 23 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Oct 6, 2011, 3:01 PM MDT (21:01 UTC)
- In effect from
- Oct 6, 2011, 9:00 PM MDT
- Expired
- Oct 7, 2011, 12:00 PM MDT
- In force
- 15 hr
- Issued by
- NWS Riverton, WY
Counties Big Horn County, WY, Fremont County, WY, Johnson County, WY, Natrona County, WY, Washakie County, WY
The radar
The Riverton/Lander radar (KRIW), 103 km from the middle of the area, began a volume at 21:01 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 7, 11:00 AM MDT | SNOW 3 | 14 W Crowheart, WY | COLD SPRINGS SNOTEL |
| Oct 7, 11:00 AM MDT | SNOW 4 | 19 Ssw Lander, WY | DEER PARK SNOTEL |
| Oct 7, 11:01 AM MDT | SNOW 1 | 12 Sw Lander, WY | TOWNSEND CREEK SNOTEL |
| Oct 7, 11:01 AM MDT | SNOW 2 | 26 Nw Lander, WY | ST. LAWRENCE ALT SNOTEL |
| Oct 7, 11:01 AM MDT | SNOW 2 | 6 Wsw Dubois, WY | LITTLE WARM SNOTEL |
| Oct 7, 11:01 AM MDT | SNOW 5 | 7 Nw Atlantic City, WY | SOUTH PASS SNOTEL |
| Oct 7, 11:01 AM MDT | HEAVY SNOW 7 | 18 W Lander, WY | HOBBS PARK SNOTEL |
| Oct 7, 11:02 AM MDT | SNOW 1 | 8 S Casper, WY | CASPER MOUNTAIN SNOTEL |
| Oct 7, 11:02 AM MDT | SNOW 3 | 22 Sse Casper, WY | RENO HILL SNOTEL |
| Oct 7, 11:30 AM MDT | SNOW 1 | 11 N Dubois, WY | BURROUGHS CREEK SNOTEL |
| Oct 7, 11:30 AM MDT | SNOW 3 | 16 Ne Dubois, WY | CASTLE CREEK SNOTEL |
| Oct 7, 11:32 AM MDT | SNOW 2 | 14 Wnw Mayoworth, WY | BEAR TRAP MEADOW SNOTEL |
| Oct 7, 11:32 AM MDT | HEAVY SNOW 7 | 13 W Barnum, WY | MIDDLE POWDER SNOTEL |
| Oct 7, 11:32 AM MDT | HEAVY SNOW 8 | 24 Sw Buffalo, WY | POWDER RIVER PASS SNOTEL |
| Oct 7, 11:32 AM MDT | HEAVY SNOW 9 | 28 E Lovell, WY | BALD MOUNTAIN SNOTEL |
| Oct 7, 11:32 AM MDT | HEAVY SNOW 15 | 18 E Shell, WY | SHELL CREEK SNOTEL |
| Oct 7, 11:32 AM MDT | HEAVY SNOW 16 | 14 Ne Shell, WY | BONE SPRINGS DIVIDE SNOTEL |
| Oct 7, 11:33 AM MDT | SNOW 2 | 21 Sw Barnum, WY | GRAVE SPRING SNOTEL |
| Oct 7, 11:33 AM MDT | HEAVY SNOW 8 | 16 W Buffalo, WY | SOLDIER PARK SNOTEL |
| Oct 7, 11:33 AM MDT | HEAVY SNOW 10 | 27 Nw Buffalo, WY | LITTLE GOOSE SNOTEL |
| Oct 7, 11:33 AM MDT | HEAVY SNOW 13 | 17 W Buffalo, WY | CLOUD PEAK RESERVOIR SNOTEL |
| Oct 7, 11:42 AM MDT | SNOW 4 | Lysite, WY | |
| Oct 7, 12:09 PM MDT | HEAVY SNOW 9.7 | 4.5 Nw Riverton, WY | RIVERTON ASOS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 9.0 hours before the alert went out and 98 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
- 1747 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
770 WWUS45 KRIW 062101 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 301 PM MDT THU OCT 6 2011 ...FIRST MAJOR WINTER STORM OF THE SEASON EXPECTED TO OCCUR IN THE MOUNTAINS OF WESTERN AND NORTHERN WYOMING THROUGH FRIDAY... .A STRONG AUTUMN STORM WILL TRACK NORTHEAST ACROSS WYOMING TONIGHT INTO FRIDAY MORNING...PRODUCING SIGNIFICANT SNOWFALL FOR MUCH OF THE MOUNTAINS OF WESTERN AND NORTHERN WYOMING THROUGH FRIDAY MORNING. WYZ008-009-070615- /O.NEW.KRIW.WS.W.0010.111007T0300Z-111007T1800Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 301 PM MDT THU OCT 6 2011 ...WINTER STORM WARNING IN EFFECT FROM 9 PM THIS EVENING TO NOON MDT FRIDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOWFALL AND SOME BLOWING SNOW...WHICH IS IN EFFECT FROM 9 PM THIS EVENING TO NOON MDT FRIDAY. * SUMMARY AND TIMING...SNOWFALL WILL DEVELOP THIS EVENING...PICKING UP IN INTENSITY BETWEEN 9 PM AND MIDNIGHT...AND CONTINUE HEAVY AT TIMES THROUGH NOON FRIDAY. * SNOW ACCUMULATIONS ABOVE 8000 FEET...WILL RANGE FROM 8 TO 14 INCHES WITH LOCALLY HIGHER AMOUNTS. * SNOW ACCUMULATIONS BELOW 8000 FEET...WILL RANGE FROM 2 TO AS MUCH AS 8 INCHES. * WIND AND VISIBILITY...NORTHWEST WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS WILL PICK UP LATE FRIDAY MORNING PRODUCING SOME BLOWING AND DRIFTING. * IMPACTS...TRAVEL OVER POWDER RIVER AND GRANITE PASSES WILL LIKELY BE TREACHEROUS LATE TONIGHT AND FRIDAY. ALSO...HUNTERS AND HIKERS SHOULD EXERCISE EXTREME CAUTION WITH THIS SIGNIFICANT WINTER STORM. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ013-070615- /O.EXA.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ JACKSON HOLE- INCLUDING THE CITY OF...JACKSON 301 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 9 AM MDT FRIDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOWFALL...WHICH IS IN EFFECT UNTIL 9 AM MDT FRIDAY. * SUMMARY AND TIMING...SNOWFALL WILL CONTINUE THROUGH MID TO LATE FRIDAY MORNING...POSSIBLY HEAVY AT TIMES. * SNOW ACCUMULATIONS...WILL RANGE FROM 3 TO 6 INCHES...WITH THE HIGHER AMOUNTS NORTH OF JACKSON. * VISIBILITY...VISIBILITY OF A MILE OR LESS CAN BE EXPECTED. * IMPACTS...HIGHWAYS WILL BE SLICK TONIGHT AND FRIDAY MORNING IN JACKSON HOLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ023-070615- /O.EXA.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ STAR VALLEY- INCLUDING THE CITIES OF...AFTON...ALPINE...THAYNE 301 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 9 AM MDT FRIDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOWFALL...WHICH IS IN EFFECT UNTIL 9 AM MDT FRIDAY. * SUMMARY AND TIMING...SNOWFALL WILL CONTINUE THROUGH MID TO LATE FRIDAY MORNING...POSSIBLY HEAVY AT TIMES. * SNOW ACCUMULATIONS...WILL RANGE FROM 3 TO 6 INCHES...WITH THE HIGHER AMOUNTS CLOSER TO THE MOUNTAINS. * VISIBILITY...VISIBILITY OF A MILE OR LESS CAN BE EXPECTED. * IMPACTS...HIGHWAYS WILL BE SLICK TONIGHT AND FRIDAY MORNING IN THE STAR VALLEY. 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. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ002-070615- /O.EXT.KRIW.WW.Y.0033.000000T0000Z-111007T1800Z/ ABSAROKA MOUNTAINS- 301 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL NOON MDT FRIDAY... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL NOON MDT FRIDAY. * SUMMARY AND TIMING...RAIN AND SNOW SHOWERS WILL CONTINUE TO INCREASE IN COVERAGE THROUGH THIS EVENING...AND INCREASE IN INTENSITY. THE RAIN WILL GRADUALLY CHANGE TO ALL SNOW OVERNIGHT AND CONTINUE...POSSIBLY HEAVY AT TIMES...THROUGH LATE FRIDAY MORNING. * SNOW ACCUMULATIONS...6 TO 12 INCHES EXCEPT 1 TO 5 INCHES BELOW 8000 FEET ON THE EASTERN SLOPES. * WIND AND VISIBILITY...NORTHWEST WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS TO WILL PICK UP FRIDAY MORNING. VISIBILITY WILL OCCASIONALLY LOWER TO ONE HALF OF A MILE IN SNOW AND FOG. * IMPACTS...THE CHIEF JOSEPH HIGHWAY AND HIGHWAY 14...16 AND 20 CLOSER TO PAHASKA WILL BECOME SLICK AND SNOW COVERED OVERNIGHT INTO FRIDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ001-070615- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 301 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY. * SUMMARY AND TIMING...SNOWFALL WILL CONTINUE OVERNIGHT INTO FRIDAY MORNING...POSSIBLY HEAVY AT TIMES. * SNOW ACCUMULATIONS...3 TO 6 INCHES EXPECTED BELOW 7500 FEET WITH 6 TO 12 INCHES ABOVE 7500 FEET. AROUND MAMMOTH AND AROUND THE LAMAR RIVER...ONLY A TRACE TO 3 INCHES IS EXPECTED. * VISIBILITY...COULD DROP TO BELOW ONE HALF MILE AT TIMES IN SNOW AND FOG...ESPECIALLY OVER PASSES. * IMPACTS...HIGHWAYS WILL LIKELY BECOME SLICK AND SNOW PACKED DURING THE NIGHT TONIGHT AND INTO FRIDAY MORNING. 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. VISITORS TO THE PARK SHOULD PREPARE FOR A DRAMATIC CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ012-070615- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ TETON AND GROS VENTRE MOUNTAINS- 301 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY. * SUMMARY AND TIMING...SNOWFALL WILL CONTINUE...POSSIBLY HEAVY AT TIMES OVERNIGHT INTO FRIDAY MORNING. * SNOW ACCUMULATIONS...WILL RANGE FROM 6 TO 12 INCHES. * WIND AND VISIBILITY...WEST TO NORTHWEST WINDS OF 15 TO 25 MPH WITH HIGHER GUSTS WILL DEVELOP FRIDAY MORNING CAUSING SOME BLOWING AND DRIFTING SNOW OVER THE HIGHER PEAKS AND PASSES. VISIBILITY COULD RANGE FROM ZERO TO AROUND A MILE AT TIMES. * IMPACTS...TETON AND TOGWOTEE PASSES WILL BE SLICK AND SNOW PACKED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ024-070615- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ SALT RIVER AND WYOMING RANGES- 301 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY. * SUMMARY AND TIMING...SNOWFALL WILL CONTINUE...POSSIBLY HEAVY AT TIMES...THROUGH FRIDAY MORNING. * SNOW ACCUMULATIONS...WILL RANGE FROM 6 TO 12 INCHES. * WIND AND VISIBILITY...SOUTHWEST TO WEST WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS WILL CAUSE BLOWING AND DRIFTING SNOW OVER THE HIGHER PEAKS AND PASSES ALONG WITH VISIBILITY RANGING FROM NEAR ZERO TO A MILE AT TIMES. * IMPACTS...SALT RIVER PASS WILL BE SLICK AND SNOW PACKED THROUGH FRIDAY. 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. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ014-015-070615- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST- 301 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY. * SUMMARY AND TIMING...SNOWFALL WILL INCREASE AGAIN THIS EVENING OVER THE WIND RIVER MOUNTAINS...ESPECIALLY THE NORTHERN HALF. THE SNOW WILL CONTINUE...POSSIBLY HEAVY AT TIMES THROUGH FRIDAY MORNING. * SNOW ACCUMULATIONS...6 TO 12 INCHES EXCEPT 2 TO 5 INCHES BELOW 8500 FEET. THE HIGHER AMOUNTS WILL OCCUR MAINLY OVER THE NORTHERN HALF OF THE RANGE. * WIND AND VISIBILITY...SOUTHWEST WINDS 10 TO 20 MPH ON THE WEST SLOPE AND 25 TO 40 MPH ON THE EAST SLOPE...WITH SOME HIGHER GUSTS ARE POSSIBLE. SOME WHITEOUT CONDITIONS ARE POSSIBLE OVER SOUTH PASS ARE POSSIBLE. * IMPACTS...TRAVEL ALONG HIGHWAY 28 OVER SOUTH PASS COULD BECOME TREACHEROUS AT TIMES...WITH CONSIDERABLE BLOWING AND DRIFTING SNOW. WHITEOUT CONDITIONS ARE POSSIBLE. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$
4 follow-up statements
036 WWUS45 KRIW 070545 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 1145 PM MDT THU OCT 6 2011 ...FIRST MAJOR WINTER STORM OF THE SEASON EXPECTED TO OCCUR IN THE MOUNTAINS OF WESTERN AND NORTHERN WYOMING THROUGH FRIDAY... .A STRONG AUTUMN STORM WILL TRACK INTO NORTHEAST WYOMING FRIDAY MORNING...PRODUCING SIGNIFICANT SNOWFALL FOR MUCH OF THE MOUNTAINS OF WESTERN AND NORTHERN WYOMING THROUGH FRIDAY MORNING. WYZ008-009-071500- /O.CON.KRIW.WS.W.0010.000000T0000Z-111007T1800Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 1145 PM MDT THU OCT 6 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT FRIDAY... * SUMMARY AND TIMING...SNOWFALL WILL REDEVELOP OVERNIGHT AND PICK UP IN INTENSITY BY MORNING. SNOWFALL WILL BE HEAVY AT TIMES HEAVY AT TIMES THROUGH NOON FRIDAY. * SNOW ACCUMULATIONS ABOVE 8000 FEET...WILL RANGE FROM 8 TO 14 INCHES WITH LOCALLY HIGHER AMOUNTS. * SNOW ACCUMULATIONS BELOW 8000 FEET...WILL RANGE FROM 2 TO AS MUCH AS 8 INCHES. * WIND AND VISIBILITY...NORTHWEST WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS WILL PICK UP LATE FRIDAY MORNING PRODUCING SOME BLOWING AND DRIFTING. * IMPACTS...TRAVEL OVER POWDER RIVER AND GRANITE PASSES WILL LIKELY BE TREACHEROUS LATE TONIGHT AND FRIDAY. ALSO...HUNTERS AND HIKERS SHOULD EXERCISE EXTREME CAUTION WITH THIS SIGNIFICANT WINTER STORM. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ001-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 1145 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY... * SUMMARY AND TIMING...SNOWFALL WILL CONTINUE OVERNIGHT INTO FRIDAY MORNING. * SNOW ACCUMULATIONS...3 TO 6 INCHES EXPECTED BELOW 7500 FEET WITH 6 TO 12 INCHES ABOVE 7500 FEET. AROUND MAMMOTH AND AROUND THE LAMAR RIVER...ONLY A TRACE TO 3 INCHES IS EXPECTED. * VISIBILITY...COULD DROP TO BELOW ONE HALF MILE AT TIMES IN SNOW AND FOG...ESPECIALLY OVER PASSES. * IMPACTS...HIGHWAYS WILL LIKELY BECOME SLICK AND SNOW PACKED INTO FRIDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. VISITORS TO THE PARK SHOULD PREPARE FOR A DRAMATIC CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ012-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ TETON AND GROS VENTRE MOUNTAINS- 1145 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY... * SUMMARY AND TIMING...SNOWFALL WILL CONTINUE AT TIMES OVERNIGHT THROUGH FRIDAY MORNING. * SNOW ACCUMULATIONS...WILL RANGE FROM 6 TO 12 INCHES. * WIND AND VISIBILITY...WEST TO NORTHWEST WINDS OF 15 TO 25 MPH WITH HIGHER GUSTS WILL DEVELOP FRIDAY MORNING CAUSING SOME BLOWING AND DRIFTING SNOW OVER THE HIGHER PEAKS AND PASSES. VISIBILITY COULD RANGE FROM ZERO TO AROUND A MILE AT TIMES. * IMPACTS...TETON AND TOGWOTEE PASSES WILL BE SLICK AND SNOW PACKED. 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. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ024-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ SALT RIVER AND WYOMING RANGES- 1145 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY... * SUMMARY AND TIMING...SNOWFALL WILL CONTINUE OVERNIGHT INTO FRIDAY MORNING. * SNOW ACCUMULATIONS...WILL RANGE FROM 6 TO 12 INCHES. * WIND AND VISIBILITY...SOUTHWEST TO WEST WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS WILL CAUSE BLOWING AND DRIFTING SNOW OVER THE HIGHER PEAKS AND PASSES ALONG WITH VISIBILITY RANGING FROM NEAR ZERO TO A MILE AT TIMES. * IMPACTS...SALT RIVER PASS WILL BE SLICK AND SNOW PACKED THROUGH FRIDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ014-015-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST- 1145 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY... * SUMMARY AND TIMING...SNOWFALL OCCUR OVERNIGHT THROUGH FRIDAY MORNING. * SNOW ACCUMULATIONS...6 TO 12 INCHES WITH 3 TO 6 INCHES BELOW 8500 FEET. * WIND AND VISIBILITY...SOUTHWEST WINDS 10 TO 20 MPH ON THE WEST SLOPE AND 25 TO 40 MPH ON THE EAST SLOPE...WITH SOME HIGHER GUSTS ARE POSSIBLE. SOME WHITEOUT CONDITIONS ARE POSSIBLE OVER SOUTH PASS THROUGH 9 AM FRIDAY. * IMPACTS...TRAVEL ALONG HIGHWAY 28 OVER SOUTH PASS COULD BECOME TREACHEROUS AT TIMES...WITH CONSIDERABLE BLOWING AND DRIFTING SNOW. WHITEOUT CONDITIONS ARE POSSIBLE. 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. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ002-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1800Z/ ABSAROKA MOUNTAINS- 1145 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT FRIDAY... * SUMMARY AND TIMING...SNOW WILL OCCUR OVERNIGHT THROUGH FRIDAY MORNING. * SNOW ACCUMULATIONS...6 TO 12 INCHES EXCEPT 2 TO 5 INCHES BELOW 8000 FEET ON THE EASTERN SLOPES. * WIND AND VISIBILITY...NORTHWEST WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS TO WILL PICK UP FRIDAY MORNING. VISIBILITY WILL BE QUITE LOW AT TIMES. * IMPACTS...THE CHIEF JOSEPH HIGHWAY AND HIGHWAY 14...16 AND 20 CLOSER TO PAHASKA WILL BECOME SLICK AND SNOW COVERED OVERNIGHT INTO FRIDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ013-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ JACKSON HOLE- INCLUDING THE CITY OF...JACKSON 1145 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY... * SUMMARY AND TIMING...PERIODS OF LIGHT SNOWFALL WILL CONTINUE THROUGH FRIDAY MORNING. * SNOW ACCUMULATIONS...WILL RANGE FROM 3 TO 6 INCHES NORTH OF JACKSON WITH 1 TO 3 INCHES AROUND JACKSON AND WILSON. * VISIBILITY...VISIBILITY OF A MILE OR LESS CAN BE EXPECTED. * IMPACTS...HIGHWAYS WILL BE SLICK INTO FRIDAY MORNING IN THE JACKSON VALLEY. 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. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ023-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ STAR VALLEY- INCLUDING THE CITIES OF...AFTON...ALPINE...THAYNE 1145 PM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY... * SUMMARY AND TIMING...PERIODS OF LIGHT SNOWFALL WILL CONTINUE THROUGH FRIDAY MORNING. * SNOW ACCUMULATIONS...WILL RANGE FROM 3 TO 6 INCHES...WITH THE HIGHER AMOUNTS CLOSER TO THE MOUNTAINS. * VISIBILITY...VISIBILITY OF A MILE OR LESS CAN BE EXPECTED. * IMPACTS...HIGHWAYS WILL BE SLICK INTO FRIDAY MORNING IN THE STAR VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$
033 WWUS45 KRIW 071145 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 545 AM MDT FRI OCT 7 2011 ...FIRST MAJOR WINTER STORM OF THE SEASON EXPECTED TO CONTINUE IN THE MOUNTAINS OF WESTERN AND NORTHERN WYOMING THROUGH THIS AFTERNOON. .A STRONG AUTUMN STORM WILL CONTINUE TO TRACK INTO NORTHEAST WYOMING THIS MORNING...PRODUCING SIGNIFICANT SNOWFALL FOR MUCH OF THE MOUNTAINS OF WESTERN AND NORTHERN WYOMING THROUGH THIS AFTERNOON. WYZ008-009-071800- /O.CON.KRIW.WS.W.0010.000000T0000Z-111007T1800Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 545 AM MDT FRI OCT 7 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY... * SUMMARY AND TIMING...SNOWFALL...HEAVY AT TIMES...WILL CONTINUE THROUGH 12 NOON TODAY. * SNOW ACCUMULATIONS ABOVE 8000 FEET...WILL RANGE FROM 8 TO 14 INCHES WITH LOCALLY HIGHER AMOUNTS. * SNOW ACCUMULATIONS BELOW 8000 FEET...WILL RANGE FROM 2 TO AS MUCH AS 8 INCHES. * WIND AND VISIBILITY...NORTHWEST WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS WILL CONTINUE THROUGH 12 NOON TODAY PRODUCING SOME BLOWING AND DRIFTING SNOW. * IMPACTS...TRAVEL OVER POWDER RIVER AND GRANITE PASSES WILL LIKELY BE TREACHEROUS TODAY. ALSO...HUNTERS AND HIKERS SHOULD EXERCISE EXTREME CAUTION WITH THIS SIGNIFICANT WINTER STORM. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ001-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 545 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT THIS MORNING... * SUMMARY AND TIMING...SNOWFALL...HEAVY AT TIMES...WILL CONTINUE THROUGH 12 NOON TODAY. * SNOW ACCUMULATIONS...OVER 6 INCHES OF SNOW HAS FALLEN AT GRASSY LAKE. 3 TO 6 INCHES ARE EXPECTED BELOW 7500 FEET WITH 6 TO 12 INCHES ABOVE 7500 FEET. AROUND MAMMOTH AND AROUND THE LAMAR RIVER...ONLY A TRACE TO 3 INCHES IS EXPECTED. * VISIBILITY...COULD DROP TO BELOW ONE HALF MILE AT TIMES IN SNOW AND FOG...ESPECIALLY OVER PASSES. * IMPACTS...HIGHWAYS WILL LIKELY BECOME SLICK AND SNOW PACKED THIS MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. VISITORS TO THE PARK SHOULD PREPARE FOR A DRAMATIC CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ012-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ TETON AND GROS VENTRE MOUNTAINS- 545 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT THIS MORNING... * SUMMARY AND TIMING...SNOWFALL...HEAVY AT TIMES...WILL CONTINUE THROUGH MID MORNING TODAY. * SNOW ACCUMULATIONS...OVER HALF A FOOT OF SNOW HAS FALLEN SO FAR. TOTAL SNOWFALL WILL RANGE FROM 6 TO 12 INCHES. * WIND AND VISIBILITY...WEST TO NORTHWEST WINDS OF 15 TO 25 MPH WITH HIGHER GUSTS WILL CONTINUE THIS MORNING CAUSING SOME BLOWING AND DRIFTING SNOW OVER THE HIGHER PEAKS AND PASSES. VISIBILITY COULD RANGE FROM ZERO TO AROUND A MILE AT TIMES. * IMPACTS...TETON AND TOGWOTEE PASSES WILL BE SLICK AND SNOW PACKED. 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. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ024-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ SALT RIVER AND WYOMING RANGES- 545 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT THIS MORNING... * SUMMARY AND TIMING...SNOWFALL...HEAVY AT TIMES...WILL CONTINUE THROUGH MID MORNING TODAY. * SNOW ACCUMULATIONS...OVER HALF A FOOT OF SNOW HAS FALLEN SO FAR. TOTAL SNOWFALL WILL RANGE FROM 6 TO 12 INCHES. * WIND AND VISIBILITY...SOUTHWEST TO WEST WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS WILL CAUSE BLOWING AND DRIFTING SNOW OVER THE HIGHER PEAKS AND PASSES ALONG WITH VISIBILITY RANGING FROM NEAR ZERO TO A MILE AT TIMES. * IMPACTS...SALT RIVER PASS WILL BE SLICK AND SNOW PACKED THROUGH THIS MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ014-015-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST- 545 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT THIS MORNING... * SUMMARY AND TIMING...SNOWFALL...HEAVY AT TIMES...WILL CONTINUE THROUGH MID MORNING TODAY. * SNOW ACCUMULATIONS...6 TO 7 INCHES OF SNOW HAS FALLEN SO FAR. TOTAL SNOWFALL WILL BE 6 TO 12 INCHES WITH 3 TO 6 INCHES BELOW 8500 FEET. * WIND AND VISIBILITY...SOUTHWEST WINDS 10 TO 20 MPH ON THE WEST SLOPE AND 25 TO 40 MPH ON THE EAST SLOPE...WITH SOME HIGHER GUSTS ARE POSSIBLE. SOME WHITEOUT CONDITIONS ARE POSSIBLE OVER SOUTH PASS THROUGH 9 AM THIS MORNING. * IMPACTS...TRAVEL ALONG HIGHWAY 28 OVER SOUTH PASS COULD BECOME TREACHEROUS AT TIMES...WITH CONSIDERABLE BLOWING AND DRIFTING SNOW. WHITEOUT CONDITIONS ARE POSSIBLE. 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. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ002-071800- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1800Z/ ABSAROKA MOUNTAINS- 545 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY... * SUMMARY AND TIMING...SNOWFALL...HEAVY AT TIMES...WILL CONTINUE THROUGH 12 NOON TODAY. * SNOW ACCUMULATIONS...6 TO 12 INCHES EXCEPT 2 TO 5 INCHES BELOW 8000 FEET ON THE EASTERN SLOPES. * WIND AND VISIBILITY...NORTHWEST WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS TO WILL CONTINUE THIS MORNING. VISIBILITY WILL BE QUITE LOW AT TIMES. * IMPACTS...THE CHIEF JOSEPH HIGHWAY AND HIGHWAY 14...16 AND 20 CLOSER TO PAHASKA WILL BE SLICK AND SNOW COVERED THROUGH NOON TODAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ013-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ JACKSON HOLE- INCLUDING THE CITY OF...JACKSON 545 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT THIS MORNING... * SUMMARY AND TIMING...PERIODS OF LIGHT SNOWFALL WILL CONTINUE THROUGH MID MORNING TODAY. * SNOW ACCUMULATIONS...1 TO 2 INCHES OF SNOW HAS FALLEN SO FAR IN JACKSON. TOTAL SNOWFALL WILL RANGE FROM 3 TO 6 INCHES NORTH OF JACKSON WITH 1 TO 3 INCHES AROUND JACKSON AND WILSON. * VISIBILITY...VISIBILITY OF A MILE OR LESS CAN BE EXPECTED. * IMPACTS...HIGHWAYS WILL BE SLICK HIS MORNING IN THE JACKSON VALLEY. 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. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ023-071500- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ STAR VALLEY- INCLUDING THE CITIES OF...AFTON...ALPINE...THAYNE 545 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT THIS MORNING... * SUMMARY AND TIMING...PERIODS OF LIGHT SNOWFALL WILL CONTINUE THROUGH MID MORNING TODAY. * SNOW ACCUMULATIONS...THAYNE AND THE STAR VALLEY RANCH HAS RECEIVED 6 INCHES OF SNOWFALL. TOTAL SNOWFALL WILL RANGE FROM 3 TO 7 INCHES...WITH THE HIGHER AMOUNTS CLOSER TO THE MOUNTAINS. * VISIBILITY...VISIBILITY OF A MILE OR LESS CAN BE EXPECTED. * IMPACTS...HIGHWAYS WILL BE SLICK THIS MORNING IN THE STAR VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ LIPSON
733 WWUS45 KRIW 071447 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 847 AM MDT FRI OCT 7 2011 ...FIRST MAJOR WINTER STORM OF THE SEASON EXPECTED TO CONTINUE IN THE MOUNTAINS OF WESTERN AND NORTHERN WYOMING THROUGH THIS AFTERNOON. .A STRONG AUTUMN STORM WILL CONTINUE TO TRACK INTO NORTHEAST WYOMING THIS MORNING...PRODUCING SIGNIFICANT SNOWFALL FOR MUCH OF THE MOUNTAINS OF WESTERN AND NORTHERN WYOMING THROUGH THIS AFTERNOON. WYZ001-071600- /O.EXP.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 847 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING... THE WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING. $$ WYZ012-071600- /O.EXP.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ TETON AND GROS VENTRE MOUNTAINS- 847 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING... THE WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING. $$ WYZ024-071600- /O.EXP.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ SALT RIVER AND WYOMING RANGES- 847 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING... THE WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING. $$ WYZ014-015-071600- /O.EXP.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST- 847 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING... THE WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING. $$ WYZ013-071600- /O.EXP.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ JACKSON HOLE- INCLUDING THE CITY OF...JACKSON 847 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING... THE WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING. $$ WYZ023-071600- /O.EXP.KRIW.WW.Y.0033.000000T0000Z-111007T1500Z/ STAR VALLEY- INCLUDING THE CITIES OF...AFTON...ALPINE...THAYNE 847 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING... THE WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING. $$ WYZ008-009-071800- /O.CON.KRIW.WS.W.0010.000000T0000Z-111007T1800Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 847 AM MDT FRI OCT 7 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY. * SNOW ACCUMULATIONS ABOVE 8000 FEET...WILL RANGE FROM 8 TO 14 INCHES WITH LOCALLY HIGHER AMOUNTS. * SNOW ACCUMULATIONS BELOW 8000 FEET...WILL RANGE FROM 2 TO AS MUCH AS 8 INCHES. * WIND AND VISIBILITY...NORTHWEST WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS WILL CONTINUE THROUGH 12 NOON TODAY PRODUCING SOME BLOWING AND DRIFTING SNOW. * IMPACTS...TRAVEL OVER POWDER RIVER AND GRANITE PASSES WILL LIKELY BE TREACHEROUS TODAY. ALSO...HUNTERS AND HIKERS SHOULD EXERCISE EXTREME CAUTION WITH THIS SIGNIFICANT WINTER STORM. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ WYZ002-071800- /O.CON.KRIW.WW.Y.0033.000000T0000Z-111007T1800Z/ ABSAROKA MOUNTAINS- 847 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY. * SNOW ACCUMULATIONS...6 TO 12 INCHES EXCEPT 2 TO 5 INCHES BELOW 8000 FEET ON THE EASTERN SLOPES. * WIND AND VISIBILITY...NORTHWEST WINDS OF 20 TO 30 MPH WITH HIGHER GUSTS TO WILL CONTINUE THIS MORNING. VISIBILITY WILL BE QUITE LOW AT TIMES. * IMPACTS...THE CHIEF JOSEPH HIGHWAY AND HIGHWAY 14...16 AND 20 CLOSER TO PAHASKA WILL BE SLICK AND SNOW COVERED THROUGH NOON TODAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. HUNTERS AND THOSE WITH OTHER OUTDOOR INTERESTS SHOULD PREPARE FOR A SUDDEN CHANGE TO WINTER WEATHER CONDITIONS. THE LATEST ROAD CONDITIONS PROVIDED BY THE WYOMING DEPARTMENT OF TRANSPORTATION ARE AVAILABLE BY CALLING 5-1-1 OR ON THE INTERNET AT WYOROAD.INFO. && $$ C.BAKER
592 WWUS45 KRIW 071758 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 1158 AM MDT FRI OCT 7 2011 ...HE WINTER STORM WARNING WILL EXPIRE AT NOON MDT TODAY... .SNOW WILL CONTINUE TO DECREASE THROUGH THE AFTERNOON WITH LIGHT SNOW ACCUMULATIONS EXPECTED. THE WINTER STORM WARNING WILL EXPIRE AT NOON MDT TODAY. WYZ008-009-071900- /O.EXP.KRIW.WS.W.0010.000000T0000Z-111007T1800Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 1158 AM MDT FRI OCT 7 2011 ...WINTER STORM WARNING WILL EXPIRE AT NOON MDT TODAY... THE WINTER STORM WARNING WILL EXPIRE AT NOON MDT TODAY. $$ WYZ002-071900- /O.EXP.KRIW.WW.Y.0033.000000T0000Z-111007T1800Z/ ABSAROKA MOUNTAINS- 1158 AM MDT FRI OCT 7 2011 ...WINTER WEATHER ADVISORY WILL EXPIRE AT NOON MDT TODAY... THE WINTER WEATHER ADVISORY WILL EXPIRE AT NOON MDT TODAY. $$
What forecasters said that day
The local office's own words before this winter storm 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 winter storm warning went out at Oct 6, 2:39 PM MDT, 22 minutes earlier.
Area forecast discussion, Oct 6, 2:39 PM MDT, 22 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RIVERTON WY 239 PM MDT THU OCT 6 2011 .SHORT TERM...TONIGHT THROUGH SATURDAY STORM SYSTEM SPINNING UP NEAR PRICE UTAH THIS AFTERNOON WITH LIGHT TO MODERATE SNOW FALLING SINCE THIS MORNING OVER MUCH OF WESTERN WYOMING. 3 INCHES OF SNOW HAS FALLEN SO FAR AROUND STAR VALLEY RANCH. BAROCLINIC LEAF MOVING THROUGH SOUTH CENTRAL WYOMING THIS AFTERNOON WITH DECENT CONVECTION DEVELOPING THERE. A FEW LIGHTNING STRIKES HAVE BEEN NOTED. ALSO HAVE TROWAL OVER SOUTHWEST WYOMING STREAMING INTO EASTERN AND CENTRAL IDAHO...WITH SOME LIGHT TO OCCASIONALLY MODERATE SNOWFALL THERE. LOW LIFTS NORTHEAST ACROSS WYOMING THIS EVENING AND OVERNIGHT WITH THE TROWAL/WARM CONVEYOR BELT SETTING UP OVER NORTHWEST AND NORTHERN WYOMING TONIGHT THROUGH FRIDAY MORNING. THE HEAVIEST PRECIPITATION LOOKS TO BE OVER NORTH CENTRAL WYOMING. SNOW LEVELS ACROSS THE WEST AND SOUTH WILL EASILY BE AT THE VALLEY FLOORS...WHILE EAST OF THE DIVIDE...SNOW LEVELS WILL BE DOWN TO BETWEEN 6500 AND 7000 FEET. WILL ALLOW CURRENT ADVISORIES TO RUN THEIR COURSE...AND WILL ADD THE STAR VALLEY AND JACKSON HOLE TO THE MIX (ALL THROUGH 9 AM). WILL GO AHEAD WITH A WARNING FOR THE BIGHORN MOUNTAINS FROM 9 PM THIS EVENING THROUGH NOON FRIDAY WITH 8 TO 14 INCHES EXPECTED THERE. THE PRECIPITATION WILL WIND DOWN BY LATE MORNING AS THE DYNAMICS LIFT NORTH. HIGH WINDS ARE EXPECTED OVERNIGHT BETWEEN EASTERN SWEETWATER...SOUTHEAST FREMONT AND NATRONA COUNTIES AS JET ROUNDS THE LOW AND LIFTS NORTHEAST OVER COLORADO AND SOUTHEAST WYOMING. SURFACE GRADIENT IS QUITE TIGHT WITH APPROX 15 MB OVERNIGHT BETWEEN KRKS AND KGCC. ALSO WILL SEE SOME 50KT+ AT H7. WILL UPGRADE HIGH WIND WATCH FROM 9 PM THROUGH 9AM...THOUGH CANCEL THE WATCH FOR WESTERN SWEETWATER AS THE BEST GRADIENT IS OFF TO THE EAST. THE WINDS DIMINISH BY LATE MORNING...THOUGH REMAIN BREEZY TO WINDY THROUGH THE DAY. NORTHWEST WINDS PICK UP FOR FRIDAY AND FRIDAY EVENING OVER MUCH OF THE AREA...AS THE SURFACE LOW LIFTS NORTHEAST INTO EASTERN MONTANA AND THE DAKOTAS. LIGHT SHOWERS LINGER THROUGH SATURDAY IN THE NORTHWEST FLOW WITHIN THE TROUGH AXIS. THE TROUGH AXIS WILL BE SLOW TO EXIT...NOT UNTIL SATURDAY NIGHT. FLAT RIDGING BUILDS IN BEHIND THE SLOWLY DEPARTING TROUGH. SOME CLOUDS LINGER THROUGH SUNDAY. TEMPERATURES RECOVER A BIT ON SATURDAY AND SUNDAY TO NEAR SEASONABLE NORMS. .LONG TERM...SUNDAY NIGHT THROUGH THURSDAY A SERIES OF SHORTWAVE TROUGHS WILL AFFECT THE REGION THROUGH THE EXTENDED PERIOD. A LOOK AT H5 HEIGHTS INDICATES A PERIOD OF SEASONAL TEMPERATURES AS ZONAL FLOW ALOFT DEVELOPS SUNDAY NIGHT AND EARLY MONDAY. AN UPPER LEVEL LOW PRESSURE SYSTEM OFF THE BRITISH COLUMBIA COAST WILL EJECT A SHORTWAVE INTO THE NORTHERN ROCKIES MONDAY AFTERNOON MAINLY AFFECTING THE WESTERN MOUNTAINS BRINGING A FEW RAIN SHOWERS BECOMING SNOW OVERNIGHT. SIGNIFICANT ACCUMULATION DOES NOT APPEAR LIKELY ATTM BUT THIS WILL BEAR WATCHING AS THE TIME APPROACHES. MID RANGE MODELS IS GOOD AGREEMENT ON BUILDING A STRONG RIDGE IN THE PACIFIC OFF THE CALIFORNIA COAST BY TUESDAY. THIS WILL KEEP THE MAIN STORM TRACK TO THE NORTH. HOWEVER THIS WILL ALSO TIGHTEN THE PRESSURE GRADIENT AS THE PARADE OF SHORTWAVES CONTINUE. TUESDAY NIGHT APPEARS TO BEGIN A WINDY PERIOD AS NORTHWEST FLOW DEVELOPS ON THE BACK SIDE OF THE RIDGE. A WAVE ON TUESDAY NIGHT SHOULD BRING A FEW SHOWERS TO THE NORTH AND SLIDE A COLD FRONT THROUGH THE CWA. WINDY CONDITIONS CAN BE EXPECTED TO ACCOMPANY THIS FRONT. CONFIDENCE IN FORECAST IS LOW BEYOND TUESDAY AS MODELS ARE TENDING TO DIVERGE A BIT WITH THE GFS FLATTENING OUT THE RIDGE A BIT ALLOWING COOLER AIR IN FROM THE NORTH. OTHER GUIDANCE KEEPING A MORE AMPLIFIED RIDGE THROUGH THURSDAY WHICH WOULD BRING DRIER AND WARMER CONDITIONS. && .AVIATION.../00Z ISSUANCE/ WIDESPREAD MVFR/IFR CIGS AND VSBY EXPECTED WEST OF THE CONTINENTAL DIVIDE THROUGH 18Z SATURDAY. PERIODS OF SNOW AND LOW STRATUS WILL OBSCURE MOUNTAINS IN AREAS WEST OF THE CONTINENTAL DIVIDE. AS THE STORM DEVELOPS...STRONG AND GUSTY WIND WILL BEGIN ALONG THE SOUTHERN WIND CORRIDOR WITH THE KRKS-KCPR AREA EXPERIENCING SOUTHWEST WIND OF 25 TO 35 KT GUSTING TO NEAR 50 KT AT TIMES. SNOW AROUND THE BIGHORNS WILL ALSO BRING IFR CIGS/VSBY STARTING TONIGHT AS WELL. THE BIG HORN BASIN WILL SEE MAINLY RAIN WITH THE GREATEST IMPACT TO CIGS IN LOW STRATUS THROUGH 18Z SATURDAY. AFTER 18Z THE MAIN IMPACTS WILL BE IN THE BIGHORNS AND AROUND KBYG WITH RAIN AND POSSIBLY SNOW EXTENDING TOWARD KCPR. && .FIRE WEATHER... FIRST STORM OF THE SEASON WILL CONTINUE TO BRING SNOW TO THE WEST OVERNIGHT INTO FRIDAY MORNING. RAIN AND SNOW WILL SPREAD INTO THE NORTH AND EVENTUALLY INTO THE CENTRAL. WINTER WEATHER ADVISORIES ARE IN EFFECT FOR THE MUCH OF THE WEST WITH A WINTER STORM WARNING FOR THE BIGHORNS. SNOW LEVELS EAST OF THE DIVIDE WILL BE ABOVE 6500 TO 7000 FEET. THE PRECIPITATION WILL DIMINISH LATE FRIDAY MORNING INTO THE AFTERNOON WITH LINGERING SHOWERS EXPECTED THROUGH SATURDAY. HIGH WINDS ARE EXPECTED TONIGHT BETWEEN EASTERN SWEETWATER...SOUTHEAST FREMONT AND NATRONA COUNTIES. GUSTY NORTHWEST TO WEST WINDS CAN BE EXPECTED TONIGHT AND FRIDAY ACROSS MUCH OF THE REMAINDER OF THE AREA. && .RIW WATCHES/WARNINGS/ADVISORIES... HIGH WIND WARNING FROM 9 PM THIS EVENING TO 9 AM MDT FRIDAY WYZ019-020-030. WINTER WEATHER ADVISORY UNTIL 9 AM MDT FRIDAY WYZ001-012>015-023-024. WINTER WEATHER ADVISORY UNTIL NOON MDT FRIDAY WYZ002. WINTER STORM WARNING FROM 9 PM THIS EVENING TO NOON MDT FRIDAY WYZ008-009. && SHORT TERM...TWB LONG TERM...BERC AVIATION...BERC FIRE WEATHER...TWB
Hazardous weather outlook, Oct 6, 5:23 AM MDT, 9 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 523 AM MDT THU OCT 6 2011 WYZ001>020-022>030-071100- 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- 244 AM MDT THU OCT 6 2011 ...WINTER WEATHER ADVISORY FOR THE WESTERN MOUNTAINS FOR TODAY... TONIGHT AND FRIDAY MORNING.... ...HIGH WIND WATCH FROM ROCK SPRINGS TO JEFFERY CITY TO CASPER TONIGHT THROUGH FRIDAY AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING. .DAY ONE...TODAY AND TONIGHT MOUNTAIN SNOW LIKELY TODAY. SNOW WILL CONTINUE IN THE MOUNTAINS TONIGHT AS WELL AS IN LOWER ELEVATIONS ALONG AND WEST OF THE DIVIDE. SIGNIFICANT SNOWFALL IS LIKELY IN MUCH OF THESE AREAS. A CHANCE OF THUNDERSTORMS IN SOUTHEAST NATRONA AND EASTERN SWEETWATER COUNTIES THIS AFTERNOON ALONG WITH SOME SMALL HAIL. VERY STRONG SOUTHWEST WINDS OF 30 TO 40 MPH ALONG WITH GUSTS OF 60 MPH ARE POSSIBLE FROM ROCK SPRINGS TO JEFFREY CITY TO CASPER TONIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY FRIDAY...COLDER WITH A GOOD CHANCE OF RAIN AND MOUNTAIN SNOW ALONG WITH SNOW AT THE LOWER ELEVATIONS ALONG AND WEST OF THE DIVIDE THROUGH 9 AM. SIGNIFICANT SNOWFALL IS LIKELY IN MUCH OF THESE AREAS. SNOW LEVELS COULD DROP AS LOW AS 5000 FEET ACROSS PORTIONS OF CENTRAL WYOMING. VERY STRONG SOUTHWEST WINDS OF 30 TO 40 MPH ALONG WITH GUSTS OF 60 MPH ARE POSSIBLE FROM ROCK SPRINGS TO JEFFREY CITY TO CASPER FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT SNOWFALL ACCUMULATIONS AS WELL AS ANY WIND GUSTS ABOVE 45 MPH. THANK YOU. TEAM RIVERTON
In the hours before
Special weather statement, Oct 6, 2:58 PM MDT, 3 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 258 PM MDT THU OCT 6 2011 WYZ010-011-062300- NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY- 258 PM MDT THU OCT 6 2011 ISOLATED THUNDERSTORMS ARE POSSIBLE THROUGH THE AFTERNOON HOURS ACROSS THE LOWER ELEVATIONS OF JOHNSON COUNTY. STRONGER STORMS COULD PRODUCE SMALL HAIL AND GUSTY OUTFLOW WIND TO 40 MPH. STORMS WILL DECREASE IN INTENSITY AND COVERAGE WITH LOSS OF DAYTIME HEATING AFTER ABOUT 630 PM. WYZ020-022-062300- CASPER MOUNTAIN-NATRONA COUNTY LOWER ELEVATIONS- 258 PM MDT THU OCT 6 2011 STRONG STORMS HAVE DEVELOPED THIS AFTERNOON NEAR THE BORDER OF NATRONA AND CONVERSE COUNTIES. THE STRONGEST STORMS SHOULD STAY TO THE EAST BUT A FEW STORMS MAY DEVELOP IN NATRONA COUNTY. THE STRONGEST STORMS WILL BE CAPABLE OF PRODUCING HEAVY DOWNPOURS... GUSTY WIND TO 50 MPH AND ONE HALF TO THREE QUARTER INCH HAIL. TRAVELERS ALONG INTERSTATE 25 SHOULD BE CAREFUL WHEN APPROACHING STORMS AS HEAVY RAIN CAN CAUSE HAZARDOUS ROAD CONDITIONS. DSB
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 6, 4:06 AM MDT | High Wind Watch | RIW | Fremont, Natrona, Sweetwater | 11 hr |
| Oct 6, 4:53 AM MDT | Winter Weather Advisory | RIW | Fremont, Hot Springs, Lincoln, Park, Sublette, Teton | 31 hr |
| Oct 6, 3:11 PM MDT | High Wind Warning | RIW | Fremont, Natrona, Sweetwater | 24 hr |
Nearby
Winter Storm Warnings in Wyoming, 2011Every winter storm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.