Alert archive / Wyoming / Winter Storm Warnings in 2011
Winter Storm Warning 7, NWS Riverton, WY
NWS Riverton, WY issued this winter storm warning at Mar 30, 2011, 3:38 AM MDT for 8 counties in Wyoming. It took effect at Mar 30, 2011, 6:32 AM MDT. It was in force for 41 hr. 44 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
- Mar 30, 2011, 3:38 AM MDT (09:38 UTC)
- In effect from
- Mar 30, 2011, 6:32 AM MDT
- Expired
- Apr 1, 2011, 12:00 AM MDT
- In force
- 41 hr
- Issued by
- NWS Riverton, WY
Counties Big Horn County, WY, Fremont County, WY, Johnson County, WY, Lincoln County, WY, Natrona County, WY, Sublette County, WY, Teton County, WY, Washakie County, WY
The radar
The Riverton/Lander radar (KRIW), 42 km from the middle of the area, began a volume at 09:38 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 |
|---|---|---|---|
| Mar 30, 2:03 PM MDT | SNOW 2 | 10 N Bondurant, WY | GRANITE CREEK SNOTEL |
| Mar 30, 2:05 PM MDT | SNOW 5 | 8 Nne Moran Junction, WY | BASE CAMP SNOTEL |
| Mar 30, 2:06 PM MDT | SNOW 3 | 8 Wnw Jackson, WY | PHILLIPS BENCH SNOTEL |
| Mar 30, 2:10 PM MDT | HEAVY SNOW 8.5 | Moose, WY | |
| Mar 30, 4:17 PM MDT | SNOW 2.5 | 1 Se Thayne, WY | |
| Mar 30, 9:44 PM MDT | HEAVY SNOW 6 | 28 E Lovell, WY | BALD MOUNTAIN SNOTEL |
| Mar 30, 9:45 PM MDT | SNOW 1 | 17 W Buffalo, WY | CLOUD PEAK RESERVOIR SNOTEL |
| Mar 30, 9:45 PM MDT | SNOW 2 | 18 E Shell, WY | SHELL CREEK SNOTEL |
| Mar 30, 9:45 PM MDT | SNOW 3 | 14 Ne Shell, WY | BONE SPRINGS DIVIDE SNOTEL |
| Mar 30, 9:45 PM MDT | SNOW 4 | 24 Sw Buffalo, WY | POWDER RIVER PASS SNOTEL |
| Mar 30, 9:46 PM MDT | SNOW 1 | 14 E Bondurant, WY | LOOMIS PARK SNOTEL |
| Mar 30, 9:46 PM MDT | SNOW 5 | 8 W South Entrance, WY | GRASSY LAKE SNOTEL |
| Mar 30, 9:46 PM MDT | HEAVY SNOW 11 | 6 Ene Alta, WY | GRAND TARGHEE SNOTEL |
| Mar 30, 9:47 PM MDT | SNOW 5 | 25 Nw Dubois, WY | TOGWOTEE PASS SNOTEL |
| Mar 30, 9:47 PM MDT | HEAVY SNOW 7 | South Entrance, WY | SNAKE RIVER STN SNOTEL |
| Mar 30, 9:47 PM MDT | HEAVY SNOW 12 | 9.3 Nnw Jackson, WY | JACKSON HOLE-MID |
| Mar 30, 9:47 PM MDT | HEAVY SNOW 15 | 9.9 Nnw Jackson, WY | JACKSON HOLE-RAYMER |
| Mar 30, 9:48 PM MDT | SNOW 4 | 1 S Jackson, WY | SNOW KING SKI AREA |
| Mar 30, 9:48 PM MDT | SNOW 4 | 8.6 Nnw Jackson, WY | JACKSON HOLE-BASE |
| Mar 30, 9:49 PM MDT | SNOW 4 | 23 Nw Dubois, WY | BROOKS LAKE LODGE |
| Mar 30, 9:49 PM MDT | HEAVY SNOW 9 | 5 Ne Alta, WY | GRAND TARGHEE-CHIEF JOSEPH |
| Mar 31, 1:50 PM MDT | HEAVY SNOW 10 | 28 E Lovell, WY | BALD MOUNTAIN SNOTEL |
| Mar 31, 1:51 PM MDT | HEAVY SNOW 7 | 14 Ne Shell, WY | BONE SPRINGS DIVIDE SNOTEL |
| Mar 31, 1:51 PM MDT | HEAVY SNOW 8 | 14 Wnw Mayoworth, WY | BEAR TRAP MEADOW SNOTEL |
| Mar 31, 1:51 PM MDT | HEAVY SNOW 10 | 18 E Shell, WY | SHELL CREEK SNOTEL |
| Mar 31, 1:51 PM MDT | HEAVY SNOW 11 | 24 Sw Buffalo, WY | POWDER RIVER PASS SNOTEL |
| Mar 31, 1:52 PM MDT | SNOW 3 | 17 W Buffalo, WY | CLOUD PEAK RESERVOIR SNOTEL |
| Mar 31, 1:52 PM MDT | SNOW 3 | 21 Sw Barnum, WY | GRAVE SPRING SNOTEL |
| Mar 31, 1:52 PM MDT | HEAVY SNOW 17 | 6 Ene Alta, WY | GRAND TARGHEE SNOTEL |
| Mar 31, 1:53 PM MDT | SNOW 5 | 16 Sw Dubois, WY | GUNSITE PASS SNOTEL |
| Mar 31, 1:53 PM MDT | HEAVY SNOW 8 | 25 Nw Dubois, WY | TOGWOTEE PASS SNOTEL |
| Mar 31, 1:54 PM MDT | SNOW 3 | 12 N Cora, WY | NEW FORK LAKE SNOTEL |
| Mar 31, 1:54 PM MDT | HEAVY SNOW 7 | 17 E Afton, WY | TRIPLE PEAK SNOTEL |
| Mar 31, 1:54 PM MDT | HEAVY SNOW 16 | 19 Sw Bondurant, WY | BLIND BULL SUMMIT SNOTEL |
| Mar 31, 4:38 PM MDT | SNOW 3 | 5 Sse Smoot, WY | |
| Mar 31, 4:39 PM MDT | SNOW 4.5 | 5 Nw Jackson, WY | |
| Mar 31, 7:14 PM MDT | HEAVY SNOW 14 | 9.3 Nnw Jackson, WY | JACKSON HOLE-MID |
| Mar 31, 7:14 PM MDT | HEAVY SNOW 16 | 9.9 Nnw Jackson, WY | JACKSON HOLE-RAYMER |
| Mar 31, 7:15 PM MDT | SNOW 5 | 8.6 Nnw Jackson, WY | JACKSON HOLE-BASE |
| Mar 31, 7:15 PM MDT | HEAVY SNOW 7 | 1 S Jackson, WY | SNOW KING SKI AREA |
| Mar 31, 7:16 PM MDT | SNOW 5 | 23 Nw Dubois, WY | BROOKS LAKE LODGE |
| Mar 31, 7:16 PM MDT | HEAVY SNOW 8 | Togwotee Mountain Lodge, WY | |
| Mar 31, 7:17 PM MDT | HEAVY SNOW 9 | 14.3 E Thayne, WY | BOX Y RANCH |
| Mar 31, 7:17 PM MDT | HEAVY SNOW 15 | 17.2 E Thayne, WY | BLIND BULL SUMMIT |
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 00:00Z, 9.6 hours before the alert went out and 43 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
- 22 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 2096 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 215 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
318 WWUS45 KRIW 300938 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 338 AM MDT WED MAR 30 2011 ...MOIST NORTHWESTERLY FLOW WILL BRING MODERATE TO HEAVY SNOWFALL AT TIMES TO THE NORTHWEST MOUNTAINS... .DEEP PACIFIC MOISTURE EMBEDDED IN STRONG NORTHWEST FLOW ALOFT WILL BRING MODERATE TO HEAVY SNOW AT TIMES TODAY. THE HEAVIEST SNOWFALL IS EXPECTED THIS AFTERNOON AND EVENING. THE SNOW WILL BEGIN TO TAPER OFF LATE TONIGHT IN THE WESTERN MOUNTAINS. HOWEVER...SNOWFALL IS EXPECTED BEGIN TONIGHT AND LAST THROUGH THURSDAY AFTERNOON IN THE BIGHORN MOUNTAINS. WYZ012-302200- /O.NEW.KRIW.WS.W.0007.110330T0938Z-110331T1200Z/ TETON AND GROS VENTRE MOUNTAINS- 338 AM MDT WED MAR 30 2011 ...WINTER STORM WARNING IN EFFECT UNTIL 6 AM MDT THURSDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER STORM WARNING FOR SNOWFALL...WHICH IS IN EFFECT UNTIL 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL OCCUR THROUGH THE DAY WITH THE HEAVIEST SNOW FALLING DURING THE AFTERNOON AND EVENING HOURS. 5 TO 7 INCHES OF SNOW HAS FALLEN SINCE LATE LAST NIGHT. * SNOW ACCUMULATIONS...7 TO 11 ADDITIONAL INCHES CAN BE EXPECTED BRINGING THE STORM TOTAL TO 12 TO 18 INCHES. * WIND AND VISIBILITY...25 TO 35 MPH WIND WILL DEVELOP THIS AFTERNOON. HIGHER GUSTS ARE POSSIBLE...TAKING VISIBILITY DOWN TO ONE QUARTER MILE AT TIMES. * IMPACTS...TETON PASS WILL BE SNOWPACKED AND SLICK. MONITOR ROAD CONDITIONS BEFORE TRAVELING BY CALLING 5 1 1 OR GOING TO W W W DOT WYOROAD DOT COM. 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. && $$ WYZ001-302200- /O.NEW.KRIW.WW.Y.0020.110330T1800Z-110331T1200Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 338 AM MDT WED MAR 30 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TODAY TO 6 AM MDT THURSDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOWFALL...WHICH IS IN EFFECT FROM NOON TODAY TO 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL BEGIN EARLY THIS AFTERNOON WITH THE HEAVIEST SNOW FALLING DURING THE AFTERNOON AND EVENING HOURS. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF NEW SNOW ARE POSSIBLE. * WIND AND VISIBILITY...20 TO 30 MPH WESTERLY WINDS ARE LIKELY...REDUCING VISIBILITY TO ONE QUARTER MILE AT TIMES. * IMPACTS...PEOPLE WITH OUTDOOR INTERESTS SHOULD BE PREPARED FOR RAPIDLY DETERIORATING CONDITIONS THIS AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ002-302200- /O.NEW.KRIW.WW.Y.0020.110330T1800Z-110331T1200Z/ ABSAROKA MOUNTAINS- 338 AM MDT WED MAR 30 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TODAY TO 6 AM MDT THURSDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOWFALL...WHICH IS IN EFFECT FROM NOON TODAY TO 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL BEGIN EARLY THIS AFTERNOON WITH THE HEAVIEST SNOW FALLING DURING THE AFTERNOON AND EVENING HOURS. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF NEW SNOW ARE POSSIBLE...MAINLY ALONG THE WEST SLOPES OF THE ABSAROKAS. * WIND AND VISIBILITY...40 TO 50 MPH WESTERLY WINDS ARE LIKELY...REDUCING VISIBILITY TO BELOW ONE QUARTER MILE AT TIMES. * IMPACTS...PEOPLE WITH OUTDOOR INTERESTS SHOULD BE PREPARED FOR RAPIDLY DETERIORATING CONDITIONS THIS AFTERNOON. 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. && $$ WYZ008-009-302200- /O.NEW.KRIW.WS.A.0005.110331T0000Z-110331T2100Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 338 AM MDT WED MAR 30 2011 ...WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH THURSDAY AFTERNOON... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM THIS EVENING THROUGH THURSDAY AFTERNOON. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW ALONG WITH VERY STRONG WINDS ARE LIKELY TO BEGIN THIS EVENING AND LAST THROUGH THURSDAY AFTERNOON. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF SNOW ARE EXPECTED IN THE NORTHERN BIGHORNS WITH LESS THAN 6 INCHES ALONG AND SOUTH OF POWDER RIVER PASS. * WIND AND VISIBILITY...WINDS 30 TO 50 MPH WITH GUSTS AROUND 70MPH ARE POSSIBLE. THIS STRONG WIND COMBINED WITH SNOWFALL COULD CREATE NEAR WHITEOUT CONDITIONS AT TIMES. * IMPACTS...THE COMBINATION OF SNOWFALL AND VERY STRONG WIND WILL MAKE TRAVEL VERY TREACHEROUS OVER MOUNTAIN PASSES. KEEP AWARE OF CURRENT CONDITIONS IF YOU MUST TRAVEL. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR HAZARDOUS WINTER WEATHER IN AND CLOSE TO THE WATCH AREA. && $$
10 follow-up statements
959 WWUS45 KRIW 301234 CCA WSWRIW URGENT - WINTER WEATHER MESSAGE...CORRECTED NATIONAL WEATHER SERVICE RIVERTON WY 632 AM MDT WED MAR 30 2011 ...MOIST NORTHWESTERLY FLOW WILL BRING MODERATE TO HEAVY SNOWFALL AT TIMES TO THE NORTHWEST MOUNTAINS... .DEEP PACIFIC MOISTURE EMBEDDED IN STRONG NORTHWEST FLOW ALOFT WILL BRING MODERATE TO HEAVY SNOW AT TIMES TODAY. THE HEAVIEST SNOWFALL IS EXPECTED THIS AFTERNOON AND EVENING. THE SNOW WILL BEGIN TO TAPER OFF LATE TONIGHT IN THE WESTERN MOUNTAINS. HOWEVER...SNOWFALL IS EXPECTED BEGIN TONIGHT AND LAST THROUGH THURSDAY AFTERNOON IN THE BIGHORN MOUNTAINS. WYZ012-310115- /O.COR.KRIW.WS.W.0007.110330T1232Z-110331T1200Z/ TETON AND GROS VENTRE MOUNTAINS- 632 AM MDT WED MAR 30 2011 ...WINTER STORM WARNING IN EFFECT UNTIL 6 AM MDT THURSDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER STORM WARNING FOR SNOWFALL...WHICH IS IN EFFECT UNTIL 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL OCCUR THROUGH THE DAY WITH THE HEAVIEST SNOW FALLING DURING THE AFTERNOON AND EVENING HOURS. 5 TO 7 INCHES OF SNOW HAS FALLEN SINCE LATE LAST NIGHT. * SNOW ACCUMULATIONS...7 TO 11 ADDITIONAL INCHES CAN BE EXPECTED BRINGING THE STORM TOTAL TO 12 TO 18 INCHES. * WIND AND VISIBILITY...25 TO 35 MPH WIND WILL DEVELOP THIS AFTERNOON. HIGHER GUSTS ARE POSSIBLE...TAKING VISIBILITY DOWN TO ONE QUARTER MILE AT TIMES. * IMPACTS...TETON PASS WILL BE SNOWPACKED AND SLICK. MONITOR ROAD CONDITIONS BEFORE TRAVELING BY CALLING 511 OR GOING TO WWW.WYOROAD.INFO. 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. && $$ WYZ001-310115- /O.NEW.KRIW.WW.Y.0020.110330T1800Z-110331T1200Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 632 AM MDT WED MAR 30 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TODAY TO 6 AM MDT THURSDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOWFALL...WHICH IS IN EFFECT FROM NOON TODAY TO 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL BEGIN EARLY THIS AFTERNOON WITH THE HEAVIEST SNOW FALLING DURING THE AFTERNOON AND EVENING HOURS. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF NEW SNOW ARE POSSIBLE. * WIND AND VISIBILITY...20 TO 30 MPH WESTERLY WINDS ARE LIKELY...REDUCING VISIBILITY TO ONE QUARTER MILE AT TIMES. * IMPACTS...PEOPLE WITH OUTDOOR INTERESTS SHOULD BE PREPARED FOR RAPIDLY DETERIORATING CONDITIONS THIS AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ002-310115- /O.NEW.KRIW.WW.Y.0020.110330T1800Z-110331T1200Z/ ABSAROKA MOUNTAINS- 632 AM MDT WED MAR 30 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TODAY TO 6 AM MDT THURSDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOWFALL...WHICH IS IN EFFECT FROM NOON TODAY TO 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL BEGIN EARLY THIS AFTERNOON WITH THE HEAVIEST SNOW FALLING DURING THE AFTERNOON AND EVENING HOURS. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF NEW SNOW ARE POSSIBLE...MAINLY ALONG THE WEST SLOPES OF THE ABSAROKAS. * WIND AND VISIBILITY...40 TO 50 MPH WESTERLY WINDS ARE LIKELY...REDUCING VISIBILITY TO BELOW ONE QUARTER MILE AT TIMES. * IMPACTS...PEOPLE WITH OUTDOOR INTERESTS SHOULD BE PREPARED FOR RAPIDLY DETERIORATING CONDITIONS THIS AFTERNOON. 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. && $$ WYZ008-009-310115- /O.NEW.KRIW.WS.A.0005.110331T0000Z-110331T2100Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 632 AM MDT WED MAR 30 2011 ...WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH THURSDAY AFTERNOON... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM THIS EVENING THROUGH THURSDAY AFTERNOON. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW ALONG WITH VERY STRONG WINDS ARE LIKELY TO BEGIN THIS EVENING AND LAST THROUGH THURSDAY AFTERNOON. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF SNOW ARE EXPECTED IN THE NORTHERN BIGHORNS WITH LESS THAN 6 INCHES ALONG AND SOUTH OF POWDER RIVER PASS. * WIND AND VISIBILITY...WINDS 30 TO 50 MPH WITH GUSTS AROUND 70MPH ARE POSSIBLE. THIS STRONG WIND COMBINED WITH SNOWFALL COULD CREATE NEAR WHITEOUT CONDITIONS AT TIMES. * IMPACTS...THE COMBINATION OF SNOWFALL AND VERY STRONG WIND WILL MAKE TRAVEL VERY TREACHEROUS OVER MOUNTAIN PASSES. KEEP AWARE OF CURRENT CONDITIONS IF YOU MUST TRAVEL. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR HAZARDOUS WINTER WEATHER IN AND CLOSE TO THE WATCH AREA. && $$
678 WWUS45 KRIW 301516 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 916 AM MDT WED MAR 30 2011 ...MOIST NORTHWESTERLY FLOW WILL BRING MODERATE TO HEAVY SNOWFALL AT TIMES TO THE NORTHWEST MOUNTAINS... .DEEP PACIFIC MOISTURE EMBEDDED IN STRONG NORTHWEST FLOW ALOFT WILL BRING MODERATE TO HEAVY SNOW AT TIMES THROUGH THIS EVENING. THE SNOW WILL BEGIN TO TAPER OFF LATE TONIGHT IN THE WESTERN MOUNTAINS. HOWEVER...SNOWFALL IS EXPECTED BEGIN TONIGHT AND LAST THROUGH THURSDAY AFTERNOON IN THE BIGHORN MOUNTAINS. WYZ012-310000- /O.CON.KRIW.WS.W.0007.000000T0000Z-110331T1200Z/ TETON AND GROS VENTRE MOUNTAINS- 916 AM MDT WED MAR 30 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL OCCUR THROUGH THE DAY. 6 TO 12 INCHES OF SNOW HAS FALLEN SINCE LATE LAST NIGHT WITH LOCALLY HIGHER AMOUNTS. * SNOW ACCUMULATIONS...TOTAL SNOWFALL WILL VARY FROM 10 TO 20 INCHES. * WIND AND VISIBILITY...25 TO 35 MPH WIND WITH HIGHER GUSTS COMBINED WITH THE SNOWFALL WILL BRING THE VISIBILITY DOWN TO ONE QUARTER MILE AT TIMES. * IMPACTS...TETON PASS WILL BE SNOWPACKED AND SLICK. MONITOR ROAD CONDITIONS BEFORE TRAVELING BY CALLING 511 OR GOING TO WWW.WYOROAD.INFO. 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. && $$ WYZ001-310000- /O.CON.KRIW.WW.Y.0020.110330T1800Z-110331T1200Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 916 AM MDT WED MAR 30 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL BEGIN EARLY THIS AFTERNOON WITH THE HEAVIEST SNOW FALLING DURING THE AFTERNOON AND EVENING HOURS. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF NEW SNOW ARE POSSIBLE. * WIND AND VISIBILITY...20 TO 30 MPH WESTERLY WINDS ARE LIKELY... REDUCING VISIBILITY TO ONE QUARTER MILE AT TIMES. * IMPACTS...PEOPLE WITH OUTDOOR INTERESTS SHOULD BE PREPARED FOR RAPIDLY DETERIORATING CONDITIONS THIS AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ002-310000- /O.CON.KRIW.WW.Y.0020.110330T1800Z-110331T1200Z/ ABSAROKA MOUNTAINS- 916 AM MDT WED MAR 30 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL BEGIN EARLY THIS AFTERNOON WITH THE HEAVIEST SNOW FALLING DURING THE AFTERNOON AND EVENING HOURS. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF NEW SNOW ARE POSSIBLE... MAINLY ALONG THE WEST SLOPES OF THE ABSAROKAS. * WIND AND VISIBILITY...40 TO 50 MPH WESTERLY WINDS ARE LIKELY... REDUCING VISIBILITY TO BELOW ONE QUARTER MILE AT TIMES. * IMPACTS...PEOPLE WITH OUTDOOR INTERESTS SHOULD BE PREPARED FOR RAPIDLY DETERIORATING CONDITIONS THIS AFTERNOON. 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. && $$ WYZ008-009-310000- /O.CON.KRIW.WS.A.0005.110331T0000Z-110331T2100Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 916 AM MDT WED MAR 30 2011 ...WINTER STORM WATCH REMAINS IN EFFECT FROM 6 PM MDT THIS EVENING THROUGH THURSDAY AFTERNOON... A WINTER STORM WATCH REMAINS IN EFFECT FROM 6 PM MDT THIS EVENING THROUGH THURSDAY AFTERNOON. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW ALONG WITH VERY STRONG WINDS ARE LIKELY TO BEGIN THIS EVENING AND LAST THROUGH THURSDAY AFTERNOON. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF SNOW ARE EXPECTED IN THE NORTHERN BIGHORNS WITH LESS THAN 6 INCHES ALONG AND SOUTH OF POWDER RIVER PASS. * WIND AND VISIBILITY...WINDS 30 TO 50 MPH WITH GUSTS AROUND 70MPH ARE POSSIBLE. THIS STRONG WIND COMBINED WITH SNOWFALL COULD CREATE NEAR WHITEOUT CONDITIONS AT TIMES. * IMPACTS...THE COMBINATION OF SNOWFALL AND VERY STRONG WIND WILL MAKE TRAVEL VERY TREACHEROUS OVER MOUNTAIN PASSES. KEEP AWARE OF CURRENT CONDITIONS IF YOU MUST TRAVEL. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR HAZARDOUS WINTER WEATHER IN AND CLOSE TO THE WATCH AREA. && $$ TEAM RIVERTON
185 WWUS45 KRIW 301903 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 103 PM MDT WED MAR 30 2011 ...MOIST NORTHWESTERLY FLOW WILL BRING MODERATE TO HEAVY SNOWFALL AT TIMES TO THE NORTHERN AND NORTHWEST MOUNTAINS... .DEEP PACIFIC MOISTURE EMBEDDED IN STRONG NORTHWEST FLOW ALOFT WILL BRING MODERATE TO HEAVY SNOW AT TIMES THROUGH THIS EVENING. THE SNOW WILL BEGIN TO TAPER OFF LATE TONIGHT IN THE WESTERN MOUNTAINS. HOWEVER...SNOWFALL IS EXPECTED BEGIN TONIGHT AND LAST THROUGH THURSDAY AFTERNOON IN THE BIGHORN MOUNTAINS. WYZ008-009-310600- /O.UPG.KRIW.WS.A.0005.110331T0000Z-110331T2100Z/ /O.EXB.KRIW.WS.W.0007.110331T0000Z-110331T2100Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 103 PM MDT WED MAR 30 2011 ...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 3 PM MDT THURSDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER STORM WARNING FOR SNOW AND STRONG NORTHWEST WIND WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO 3 PM MDT THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW ALONG WITH VERY STRONG WINDS ARE LIKELY TO BEGIN THIS EVENING AND LAST THROUGH THURSDAY AFTERNOON. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF SNOW ARE EXPECTED IN THE NORTHERN BIGHORNS WITH LESS THAN 6 INCHES SOUTH OF POWDER RIVER PASS. LOCALLY HIGHER AMOUNTS ARE EXPECTED ON NORTH FACING SLOPES IN THE NORTHERN PART OF THE RANGE. * WIND AND VISIBILITY...WINDS 30 TO 50 MPH WITH GUSTS AROUND 70MPH ARE POSSIBLE. THIS STRONG WIND COMBINED WITH SNOWFALL COULD CREATE NEAR WHITEOUT CONDITIONS AT TIMES. * IMPACTS...THE COMBINATION OF SNOWFALL AND VERY STRONG WIND WILL MAKE TRAVEL VERY TREACHEROUS OVER MOUNTAIN PASSES. KEEP AWARE OF CURRENT CONDITIONS IF YOU MUST TRAVEL. 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. && $$ WYZ012-310600- /O.CON.KRIW.WS.W.0007.000000T0000Z-110331T1200Z/ TETON AND GROS VENTRE MOUNTAINS- 103 PM MDT WED MAR 30 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL OCCUR THROUGH THE DAY. 8 TO 14 INCHES OF SNOW HAS FALLEN SINCE LATE LAST NIGHT IN THE TETONS WITH MUCH LESS ELSEWHERE. * SNOW ACCUMULATIONS...TOTAL SNOWFALL WILL VARY FROM 10 TO 20 INCHES IN THE TETONS WITH 5 TO 10 INCHES IN THE GROS VENTRE RANGE. * WIND AND VISIBILITY...25 TO 35 MPH WIND WITH HIGHER GUSTS COMBINED WITH THE SNOWFALL WILL BRING THE VISIBILITY DOWN TO ONE QUARTER MILE AT TIMES. * IMPACTS...TETON PASS WILL BE SNOWPACKED AND SLICK. MONITOR ROAD CONDITIONS BEFORE TRAVELING BY CALLING 511 OR GOING TO WWW.WYOROAD.INFO. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ WYZ001-310600- /O.CON.KRIW.WW.Y.0020.000000T0000Z-110331T1200Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 103 PM MDT WED MAR 30 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL BEGIN LATE THIS AFTERNOON WITH THE HEAVIEST SNOW FALLING DURING THE EVENING HOURS. * SNOW ACCUMULATIONS...5 TO 10 INCHES OF SNOW ARE EXPECTED WITH LESS IN THE LOWER VALLEYS. * WIND AND VISIBILITY...20 TO 30 MPH WESTERLY WINDS ARE LIKELY... REDUCING VISIBILITY TO ONE QUARTER MILE AT TIMES. * IMPACTS...PEOPLE WITH OUTDOOR INTERESTS SHOULD BE PREPARED FOR RAPIDLY DETERIORATING CONDITIONS THIS AFTERNOON. 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. && $$ WYZ002-310600- /O.CON.KRIW.WW.Y.0020.000000T0000Z-110331T1200Z/ ABSAROKA MOUNTAINS- 103 PM MDT WED MAR 30 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL BEGIN LATE THIS AFTERNOON WITH THE HEAVIEST SNOW FALLING DURING THE EVENING HOURS. * SNOW ACCUMULATIONS...5 TO 10 INCHES OF NEW SNOW ARE EXPECTED... MAINLY ALONG THE WEST SLOPES OF THE ABSAROKAS. * WIND AND VISIBILITY...40 TO 50 MPH WESTERLY WINDS ARE LIKELY... REDUCING VISIBILITY TO BELOW ONE QUARTER MILE AT TIMES. * IMPACTS...PEOPLE WITH OUTDOOR INTERESTS SHOULD BE PREPARED FOR RAPIDLY DETERIORATING CONDITIONS THIS AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ TEAM RIVERTON
017 WWUS45 KRIW 310133 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 733 PM MDT WED MAR 30 2011 ...MOIST NORTHWESTERLY FLOW WILL BRING MODERATE TO HEAVY SNOWFALL AT TIMES TO THE NORTHERN AND NORTHWEST MOUNTAINS... .DEEP PACIFIC MOISTURE EMBEDDED IN STRONG NORTHWEST FLOW ALOFT WILL BRING MODERATE TO HEAVY SNOW AT TIMES THROUGH THIS EVENING. THE SNOW WILL BEGIN TO TAPER OFF LATE TONIGHT IN THE WESTERN MOUNTAINS. HOWEVER...SNOWFALL IS EXPECTED BEGIN TONIGHT AND LAST THROUGH THURSDAY AFTERNOON IN THE BIGHORN MOUNTAINS. WYZ012-310945- /O.CON.KRIW.WS.W.0007.000000T0000Z-110331T1200Z/ TETON AND GROS VENTRE MOUNTAINS- 733 PM MDT WED MAR 30 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY. * SUMMARY AND TIMING...THE HEAVIEST SNOW WILL FALL ACROSS THE HIGHER PEAKS IN NORTHERN END OF THE TETON RANGE FROM GRAND TETON NORTH TO MOUNT MORAN THIS EVENING. LESS SNOW IS EXPECTED BELOW ACROSS THE SOUTHERN END OF THE RANGE AND BELOW 9000 FEET. * SNOW ACCUMULATIONS...AN ADDITIONAL 4 TO 6 INCHES IS EXPECTED TONIGHT ACROSS THE NORTHERN END OF THE TETON RANGE WITH 1 TO 4 INCHES SOUTH OF GRAND TETON TO TETON PASS. THE TOP OF JACKSON HOLE SKI RESORT HAS RECEIVED 15 INCHES OF NEW SNOW SINCE 7 PM TUESDAY. * WIND AND VISIBILITY...RIDGE TOP WEST WIND AT 25 TO 35 MPH WITH HIGHER GUSTS COMBINED WITH THE SNOWFALL WILL BRING THE VISIBILITY DOWN TO ONE QUARTER MILE AT TIMES. * IMPACTS...TETON PASS WILL BE SNOWPACKED AND SLICK. MONITOR ROAD CONDITIONS BEFORE TRAVELING BY CALLING 511 OR GOING TO WWW.WYOROAD.INFO. 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. && $$ WYZ008-009-310945- /O.CON.KRIW.WS.W.0007.000000T0000Z-110331T2100Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 733 PM MDT WED MAR 30 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL CONTINUE TO SPREAD SOUTH ACROSS THE BIG HORN RANGE TO NEAR POWDER RIVER PASS THIS EVENING. THE HEAVIEST SNOW WAS ALONG HIGHWAY 14 THROUGH SHELL CANYON AND OVER GRANITE PASS PUSHING SOUTHWARD. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF SNOW ARE EXPECTED IN THE NORTHERN BIGHORNS WITH LESS THAN 6 INCHES SOUTH OF POWDER RIVER PASS. LOCALLY HIGHER AMOUNTS ARE EXPECTED ON NORTH FACING SLOPES IN THE NORTHERN PART OF THE RANGE. * WIND AND VISIBILITY...WINDS 30 TO 50 MPH WITH GUSTS AROUND 70 MPH ARE POSSIBLE. THIS STRONG WIND COMBINED WITH SNOWFALL COULD CREATE NEAR WHITEOUT CONDITIONS AT TIMES. * IMPACTS...THE COMBINATION OF SNOWFALL AND VERY STRONG WIND WILL MAKE TRAVEL VERY TREACHEROUS OVER MOUNTAIN PASSES. KEEP AWARE OF CURRENT CONDITIONS IF YOU MUST TRAVEL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ WYZ001-310945- /O.CON.KRIW.WW.Y.0020.000000T0000Z-110331T1200Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 733 PM MDT WED MAR 30 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY BANDS OF SNOW WILL CONTINUE THIS EVENING MAINLY ACROSS THE NORTH AND WEST PORTIONS OF THE PARK. * SNOW ACCUMULATIONS...5 TO 10 INCHES OF SNOW ARE EXPECTED WITH THE HEAVIER SNOW BANDS WITH 1 TO 4 INCHES OF SNOWFALL ELSEWHERE. * WIND AND VISIBILITY...20 TO 30 MPH WESTERLY WINDS ARE LIKELY... REDUCING VISIBILITY TO ONE QUARTER MILE AT TIMES. * IMPACTS...PEOPLE WITH OUTDOOR INTERESTS SHOULD BE PREPARED FOR RAPIDLY DETERIORATING CONDITIONS TONIGHT. 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. && $$ WYZ002-310945- /O.CON.KRIW.WW.Y.0020.000000T0000Z-110331T1200Z/ ABSAROKA MOUNTAINS- 733 PM MDT WED MAR 30 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MDT THURSDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW BANDS WILL CONTINUE TONIGHT ACROSS THE BEARTOOTH PASS AREA AND MAINLY ALONG AND NORTH OF CHIEF JOSEPH HIGHWAY ABOVE 9000 FEET. * SNOW ACCUMULATIONS...5 TO 10 INCHES OF NEW SNOW ARE EXPECTED... MAINLY ALONG THE NORTH AND WEST SLOPES OF THE ABSAROKAS. * WIND AND VISIBILITY...40 TO 50 MPH WESTERLY WINDS ARE LIKELY... REDUCING VISIBILITY TO BELOW ONE QUARTER MILE AT TIMES. * IMPACTS...PEOPLE WITH OUTDOOR INTERESTS SHOULD BE PREPARED FOR RAPIDLY DETERIORATING CONDITIONS TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ AEM
265 WWUS45 KRIW 310838 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 238 AM MDT THU MAR 31 2011 ...MOIST NORTHWESTERLY FLOW WILL BRING MODERATE TO HEAVY SNOWFALL AT TIMES TO THE BIGHORN MOUNTAINS... .DEEP PACIFIC MOISTURE EMBEDDED IN STRONG NORTHWEST FLOW ALOFT WILL BRING MODERATE TO HEAVY SNOW AT TIMES THROUGH MID AFTERNOON. WYZ012-310945- /O.CAN.KRIW.WS.W.0007.000000T0000Z-110331T1200Z/ TETON AND GROS VENTRE MOUNTAINS- 238 AM MDT THU MAR 31 2011 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE WINTER STORM WARNING. SNOW HAS TAPERED OFF IN THE AREA. ANY REMAINING SNOW WILL BE VERY LIGHT WITH LITTLE ADDITIONAL ACCUMULATION. $$ WYZ001-002-310945- /O.CAN.KRIW.WW.Y.0020.000000T0000Z-110331T1200Z/ YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 238 AM MDT THU MAR 31 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE WINTER WEATHER ADVISORY. SNOW HAS TAPERED OFF IN THE AREA. ANY REMAINING SNOW WILL BE VERY LIGHT WITH LITTLE ADDITIONAL ACCUMULATION.. $$ WYZ008-009-311645- /O.CON.KRIW.WS.W.0007.000000T0000Z-110331T2100Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 238 AM MDT THU MAR 31 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT THIS AFTERNOON... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT THIS AFTERNOON. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL CONTINUE TO SPREAD SOUTH ACROSS THE BIG HORN RANGE TO NEAR POWDER RIVER PASS THIS MORNING. THE HEAVIEST SNOW WAS ALONG HIGHWAY 14 THROUGH SHELL CANYON AND OVER GRANITE PASS PUSHING SOUTHWARD. 4 TO 7 INCHES OF SNOW HAD ALREADY FALLEN BY EARLY THIS MORNING. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF SNOW ARE EXPECTED IN THE NORTHERN BIGHORNS WITH LESS THAN 6 INCHES SOUTH OF POWDER RIVER PASS. LOCALLY HIGHER AMOUNTS ARE EXPECTED ON NORTH FACING SLOPES IN THE NORTHERN PART OF THE RANGE. * WIND AND VISIBILITY...WINDS 30 TO 50 MPH WITH GUSTS AROUND 70 MPH ARE POSSIBLE. THIS STRONG WIND COMBINED WITH SNOWFALL COULD CREATE NEAR WHITEOUT CONDITIONS AT TIMES. * IMPACTS...THE COMBINATION OF SNOWFALL AND VERY STRONG WIND WILL MAKE TRAVEL VERY TREACHEROUS OVER MOUNTAIN PASSES. KEEP AWARE OF CURRENT CONDITIONS IF YOU MUST TRAVEL. 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. && $$
001 WWUS45 KRIW 310840 WSWRIW URGENT - WINTER WEATHER MESSAGE...RESENT NATIONAL WEATHER SERVICE RIVERTON WY 239 AM MDT THU MAR 31 2011 ...MOIST NORTHWESTERLY FLOW WILL BRING MODERATE TO HEAVY SNOWFALL AT TIMES TO THE BIGHORN MOUNTAINS... .DEEP PACIFIC MOISTURE EMBEDDED IN STRONG NORTHWEST FLOW ALOFT WILL BRING MODERATE TO HEAVY SNOW AT TIMES THROUGH MID AFTERNOON. WYZ012-310945- /O.CAN.KRIW.WS.W.0007.000000T0000Z-110331T1200Z/ TETON AND GROS VENTRE MOUNTAINS- 239 AM MDT THU MAR 31 2011 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE WINTER STORM WARNING. SNOW HAS TAPERED OFF IN THE AREA. ANY REMAINING SNOW WILL BE VERY LIGHT WITH LITTLE ADDITIONAL ACCUMULATION. $$ WYZ001-002-310945- /O.CAN.KRIW.WW.Y.0020.000000T0000Z-110331T1200Z/ YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 239 AM MDT THU MAR 31 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE WINTER WEATHER ADVISORY. SNOW HAS TAPERED OFF IN THE AREA. ANY REMAINING SNOW WILL BE VERY LIGHT WITH LITTLE ADDITIONAL ACCUMULATION.. $$ WYZ008-009-311700- /O.CON.KRIW.WS.W.0007.000000T0000Z-110331T2100Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 239 AM MDT THU MAR 31 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT THIS AFTERNOON... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT THIS AFTERNOON. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL CONTINUE TO SPREAD SOUTH ACROSS THE BIG HORN RANGE TO NEAR POWDER RIVER PASS THIS MORNING. THE HEAVIEST SNOW WAS ALONG HIGHWAY 14 THROUGH SHELL CANYON AND OVER GRANITE PASS PUSHING SOUTHWARD. 4 TO 7 INCHES OF SNOW HAD ALREADY FALLEN BY EARLY THIS MORNING. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF SNOW ARE EXPECTED IN THE NORTHERN BIGHORNS WITH LESS THAN 6 INCHES SOUTH OF POWDER RIVER PASS. LOCALLY HIGHER AMOUNTS ARE EXPECTED ON NORTH FACING SLOPES IN THE NORTHERN PART OF THE RANGE. * WIND AND VISIBILITY...WINDS 30 TO 50 MPH WITH GUSTS AROUND 70 MPH ARE POSSIBLE. THIS STRONG WIND COMBINED WITH SNOWFALL COULD CREATE NEAR WHITEOUT CONDITIONS AT TIMES. * IMPACTS...THE COMBINATION OF SNOWFALL AND VERY STRONG WIND WILL MAKE TRAVEL VERY TREACHEROUS OVER MOUNTAIN PASSES. KEEP AWARE OF CURRENT CONDITIONS IF YOU MUST TRAVEL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$
234 WWUS45 KRIW 310842 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 242 AM MDT THU MAR 31 2011 ...MOIST NORTHWESTERLY FLOW WILL BRING MODERATE TO HEAVY SNOWFALL AT TIMES TO THE BIGHORN MOUNTAINS... .DEEP PACIFIC MOISTURE EMBEDDED IN STRONG NORTHWEST FLOW ALOFT WILL BRING MODERATE TO HEAVY SNOW AT TIMES THROUGH MID AFTERNOON. WYZ008-009-312100- /O.CON.KRIW.WS.W.0007.000000T0000Z-110331T2100Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 242 AM MDT THU MAR 31 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT THIS AFTERNOON... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT THIS AFTERNOON. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL CONTINUE TO SPREAD SOUTH ACROSS THE BIG HORN RANGE TO NEAR POWDER RIVER PASS THIS MORNING. THE HEAVIEST SNOW WAS ALONG HIGHWAY 14 THROUGH SHELL CANYON AND OVER GRANITE PASS PUSHING SOUTHWARD. 4 TO 7 INCHES OF SNOW HAD ALREADY FALLEN BY EARLY THIS MORNING. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF SNOW ARE EXPECTED IN THE NORTHERN BIGHORNS WITH LESS THAN 6 INCHES SOUTH OF POWDER RIVER PASS. LOCALLY HIGHER AMOUNTS ARE EXPECTED ON NORTH FACING SLOPES IN THE NORTHERN PART OF THE RANGE. * WIND AND VISIBILITY...WINDS 30 TO 50 MPH WITH GUSTS AROUND 70 MPH ARE POSSIBLE. THIS STRONG WIND COMBINED WITH SNOWFALL COULD CREATE NEAR WHITEOUT CONDITIONS AT TIMES. * IMPACTS...THE COMBINATION OF SNOWFALL AND VERY STRONG WIND WILL MAKE TRAVEL VERY TREACHEROUS OVER MOUNTAIN PASSES. KEEP AWARE OF CURRENT CONDITIONS IF YOU MUST TRAVEL. 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. && $$
012 WWUS45 KRIW 311610 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 1010 AM MDT THU MAR 31 2011 ...MOIST NORTHWESTERLY FLOW WILL BRING MODERATE TO HEAVY SNOWFALL AT TIMES TO THE BIGHORN MOUNTAINS... .DEEP PACIFIC MOISTURE EMBEDDED IN STRONG NORTHWEST FLOW ALOFT WILL BRING MODERATE TO HEAVY SNOW AT TIMES THROUGH MIDNIGHT. WYZ008-009-010600- /O.EXT.KRIW.WS.W.0007.000000T0000Z-110401T0600Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 1010 AM MDT THU MAR 31 2011 ...WINTER STORM WARNING NOW IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... THE WINTER STORM WARNING IS NOW IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL CONTINUE TO SPREAD SOUTH ACROSS THE BIGHORN MOUNTAINS WITH THE HEAVIEST SNOW WAS ALONG HIGHWAY 14 THROUGH SHELL CANYON AND OVER GRANITE PASS PUSHING SOUTHWARD. 4 TO 7 INCHES OF SNOW HAD ALREADY FALLEN BY EARLY THIS MORNING. * SNOW ACCUMULATIONS...6 TO 12 INCHES OF SNOW ARE EXPECTED IN THE NORTHERN BIGHORNS WITH LESS THAN 6 INCHES SOUTH OF POWDER RIVER PASS. LOCALLY HIGHER AMOUNTS ARE EXPECTED ON NORTH FACING SLOPES IN THE NORTHERN PART OF THE RANGE. * WIND AND VISIBILITY...WINDS 30 TO 50 MPH WITH GUSTS AROUND 70 MPH ARE POSSIBLE. THIS STRONG WIND COMBINED WITH SNOWFALL COULD CREATE NEAR WHITEOUT CONDITIONS AT TIMES. * IMPACTS...THE COMBINATION OF SNOWFALL AND VERY STRONG WIND WILL MAKE TRAVEL VERY TREACHEROUS OVER MOUNTAIN PASSES. KEEP AWARE OF CURRENT CONDITIONS IF YOU MUST TRAVEL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ C.BAKER
899 WWUS45 KRIW 010200 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 800 PM MDT THU MAR 31 2011 ...MOIST NORTHWESTERLY FLOW WILL BRING MODERATE TO HEAVY SNOWFALL AT TIMES TO THE BIGHORN MOUNTAINS... .DEEP PACIFIC MOISTURE EMBEDDED IN STRONG NORTHWEST FLOW ALOFT WILL BRING MODERATE TO HEAVY SNOW AT TIMES THROUGH MIDNIGHT. WYZ008-009-010600- /O.CON.KRIW.WS.W.0007.000000T0000Z-110401T0600Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 800 PM MDT THU MAR 31 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW CONTINUED TO FALL ACROSS THE NORTHERN BIG HORN RANGE EARLY THIS EVENING. THE SNOW IS EXPECTED TO DECREASE IN INTENSITY OVERNIGHT. * SNOW ACCUMULATIONS...AN ADDITIONAL 2 TO 4 INCHES IS EXPECTED THIS EVENING ALONG AND NORTH OF HIGHWAY 16 OVER POWDER RIVER PASS. 8 TO 12 INCHES OF SNOW HAS FALLEN OVER MUCH OF THE NORTHERN RANGE...FROM POWDER RIVER PASS NORTHWARD...SINCE TUESDAY NIGHT. ONLY 2 TO 4 INCHES HAS FALLEN OVER THE SOUTHERN PORTION OF THE RANGE. * WIND AND VISIBILITY...NORTHWEST WIND AT 15 TO 25 MPH WITH GUSTS 30 TO 40 MPH WILL CONTINUE THIS EVENING. VISIBILITY WILL BE REDUCED TO A FEW HUNDRED FEET AT TIMES IN BLOWING AND DRIFTING SNOW. * IMPACTS...THE COMBINATION OF SNOWFALL AND STRONG WIND WILL MAKE TRAVEL VERY TREACHEROUS OVER MOUNTAIN PASSES. KEEP AWARE OF CURRENT CONDITIONS IF YOU MUST TRAVEL. 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. && $$
510 WWUS45 KRIW 010554 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 1154 PM MDT THU MAR 31 2011 WYZ008-009-010700- /O.EXP.KRIW.WS.W.0007.000000T0000Z-110401T0600Z/ BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- 1154 PM MDT THU MAR 31 2011 ...WINTER STORM WARNING WILL EXPIRE AT MIDNIGHT MDT TONIGHT... THE WINTER STORM WARNING WILL EXPIRE AT MIDNIGHT MDT TONIGHT. SNOWFALL WILL CONTINUE TO MOVE FURTHER EAST AND DECREASE OVERNIGHT. POWDER RIVER PASS WILL REMAIN SLICK AND SNOW-PACKED THROUGH FRIDAY MORNING. $$ AEM
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 Mar 30, 3:13 AM MDT, 25 minutes earlier.
Area forecast discussion, Mar 30, 3:13 AM MDT, 25 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RIVERTON WY 313 AM MDT WED MAR 30 2011 .SHORT TERM...TODAY THROUGH FRIDAY NIGHT STRONG JET IS RIDING OVER A LARGE EASTERN PACIFIC RIDGE THIS MORNING. THE COMBINATION OF THE 140 KT JET AND THE RIDGE SURGING EASTWARD WILL BRING A PLETHORA OF INCLEMENT WEATHER TO THE COWBOY STATE TODAY AND THURSDAY. PERIODS OF MODERATE TO HEAVY SNOW HAVE ALREADY STARTED IN THE TETONS. THIS AND EXPECTATION OF ENHANCEMENT DUE TO ISENTROPIC LIFT ASSOCIATED WITH STRONG WARM ADVECTION WITH THE SURGING RIDGE HAS PROMPTED THE ISSUANCE OF A WINTER STORM WARNING FOR THE TETONS. 5 TO 7 INCHES OF SNOW HAS ALREADY FALLEN WITH AN ADDITIONAL 6 TO 12 POSSIBLE THROUGH TONIGHT. WHILE LITTLE SNOW HAS FALLEN THUS FAR ELSEWHERE IN THE NORTHWEST MOUNTAINS...THIS FAVORABLE ISENTROPIC ENHANCEMENT WILL BRING 6 TO 12 INCHES OF SNOW TO YELLOWSTONE NATIONAL PARK AND THE WEST SLOPES OF THE ABSAROKAS AS WELL. WESTERN VALLEYS WILL LIKELY SEE A RAIN/SNOW MIX WITH 1 TO 3 INCHES OF WET SLUSHY SNOW. TEMPERATURES WILL BE SUCH THAT IF ENOUGH EVAPORATIVE COOLING OCCURS SNOW WILL BE THE FAVORED PRECIPITATION TYPE AND SNOW TOTALS WILL BE A BIT HIGHER. RIGHT EXIT REGION DYNAMICS WILL ENHANCE MOUNTAIN WAVE AND THUS HIGH WIND POTENTIAL THIS EVENING AND OVERNIGHT FOR MUCH OF CENTRAL WYOMING. EASTERN SWEETWATER COUNTY AND THE GREEN MOUNTAINS AND RATTLESNAKE HILLS SHOULD BEGIN FIRST WITH STRONG TO HIGH WINDS BEGINNING DURING THE MID MORNING HOURS. AS THE PRESSURE GRADIENT TIGHTENS THIS AFTERNOON...HIGH WIND IS LIKELY IN THE ABSAROKAS AND CODY FOOTHILLS...PARTICULARLY IN AND AROUND CLARK. HAVE ISSUED HIGH WIND WARNINGS FOR THESE AREAS AND THE UPPER WIND RIVER BASIN WHERE STRONG NORTHWEST GRADIENT FLOW WILL FUNNEL DOWN FROM THE DUBOIS AREA. WINDY CONDITIONS WILL BE FELT ACROSS MUCH OF THE AREA BUT THE AREAS HIGHLIGHTED WILL BE THE MOST AFFECTED TONIGHT. THE NEXT AREA OF CONCERN IS THE BIGHORN MOUNTAINS. AS THE JET AND WAA TRANSLATE EASTWARD...FAVORABLE CONDITIONS WILL DEVELOP FOR BOTH HIGH WIND AND HEAVY SNOW. THIS COMBINATION HAS PROMPTED ISSUANCE OF A WINTER STORM WATCH FOR THIS AREA EFFECTIVE THURSDAY. HIGH WIND IS POSSIBLE ALONG MUCH OF THE RANGE WITH HEAVIEST SNOW LIKELY CONFINED TO AREAS NORTH OF POWDER RIVER PASS. CONSIDERED HIGH WIND WATCH AS WIDESPREAD 12+ INCH SNOWFALL SEEMS UNLIKELY BUT THE COMBINATION OF WIND AND SNOW WILL CAUSE TREACHEROUS TRAVEL CONDITIONS. WILL LEAVE TO DAY SHIFT TO DECIDE WHICH WAY TO ULTIMATELY GO. PACIFIC MOISTURE IN NORTHWEST FLOW WILL KEEP PERIODS OF LIGHT SNOW THROUGH FRIDAY FOR THE NORTHWEST MOUNTAINS. DRY CONDITIONS AND WARMER TEMPERATURES CAN BE EXPECTED ELSEWHERE FRIDAY AS THE PACIFIC RIDGE MOVES INTO THE INTERMOUNTAIN WEST. .LONG TERM...SATURDAY THROUGH WEDNESDAY A SHORTWAVE TROUGH OVER THE NORTH CENTRAL PACIFIC THIS MORNING WILL IMPACT THE ROCKIES THIS WEEKEND...USHERING IN MUCH COOLER TEMPERATURES AND A CHANCE OF SIGNIFICANT SNOWFALL ACROSS PORTIONS OF THE FORECAST AREA. SATURDAY WILL BE QUITE WARM...AS THIS SYSTEM PUSHES INTO THE PACIFIC NORTHWEST BACKING THE FLOW TO THE WEST/SOUTHWEST...ALLOWING DECENT WARM AIR ADVECTION. 700 MB TEMPERATURES ARE PROJECTED TO BE IN THE ZERO TO +5 DEG CELSIUS RANGE SATURDAY. PRECIPITATION IS EXPECTED TO BREAK OUT OVER OVER THE WEST SATURDAY...WITH MAINLY RAIN IN THE WESTERN VALLEYS/BASINS. THE TROUGH DIGS INTO THE INTERMOUNTAIN WEST SATURDAY NIGHT...THEN ACROSS THE ROCKIES SUNDAY/SUNDAY NIGHT. MEDIUM RANGE MODELS HAVE BEEN TRENDING TOWARDS THE BEST ENERGY SLIDING SOUTHEAST ACROSS S IDAHO/SW WYOMING/N UTAH SUNDAY/SUNDAY EVENING...WHICH WOULD BE SUPPORTIVE OF UPSLOPE CONDITIONS DEVELOPING EAST OF THE DIVIDE. CONTINUED CHANCE/LIKELY POPS ACROSS MUCH OF THE AREA SATURDAY NIGHT THROUGH SUNDAY NIGHT. THE ASSOCIATED COLD FRONT IS EXPECTED TO PUSH QUICKLY THROUGH THE AREA SATURDAY NIGHT/SUNDAY MORNING WITH PRECIPITATION QUICKLY BECOMING ALL SNOW EVEN ACROSS THE LOWER ELEVATIONS EAST OF THE DIVIDE SUNDAY MORNING. HAVE GONE BELOW MEX MOS GUIDANCE FOR HIGHS ON SUNDAY...AS GUIDANCE TRIES TO WARM UP THE AREA...IN SPITE OF A COLD FRONTAL PASSAGE. HIGHS...ESPECIALLY EAST OF THE DIVIDE WILL PROBABLY OCCUR EARLY SUNDAY...AHEAD OF THE COLD FRONT. IN WAKE OF THIS STORM...MEDIUM RANGE MODELS ARE SHOWING A TRANSITORY RIDGE IN THE GENERAL NORTHWEST FLOW MONDAY/MONDAY NIGHT RESULTING IN MAINLY DRY CONDITIONS. A SHORTWAVE IN THE NORTHWEST FLOW COULD AFFECT THE AREA TUESDAY/WEDNESDAY...RESULTING IN A CHANCE OF PRECIPITATION MAINLY OVER THE NORTHWEST AND NORTHERN SECTIONS OF THE FORECAST AREA. && .AVIATION... WEST OF THE DIVIDE...PERIODS OF SNOW WILL OCCUR TODAY AND THIS EVENING. SOME AREAS MAY SEE RAIN AFTER 18Z. EXPECT MVFR CONDITIONS IN MANY LOCATIONS WITH SOME IFR CONDITIONS AT TIMES. JACKSON AIRPORT WILL SEE MVFR TO IFR CONDITIONS TODAY AND THIS EVENING. EAST OF THE DIVIDE VFR CONDITIONS WILL OCCUR TODAY AND THIS EVENING. BREEZY TO WINDY CONDITIONS WILL BE COMMON TODAY AND TONIGHT OVER THE REGION. THE STRONGEST WIND WILL BE AROUND THE KRKS AIRPORT WHERE WIND SPEEDS OF 25 TO 30 KNOTS WILL BE COMMON WITH GUSTS OVER 40 KNOTS. && .FIRE WEATHER... WINDY CONDITIONS CAN BE EXPECTED TODAY AND THURSDAY AS A STRENGTHENING PRESSURE GRADIENT BRINGS 30 TO 40 MPH WIND WITH GUSTS OVER 50 MPH TO MANY AREAS EAST OF THE CONTINENTAL DIVIDE. RIDGETOP WINDS OF 50 TO 60 MPH WITH HIGHER GUSTS ARE POSSIBLE AS WELL. PLEASE CHECK OUR HIGH WIND PRODUCTS FOR MORE INFORMATION. MODERATE TO HEAVY SNOW WILL FALL IN THE NORTHWEST MOUNTAINS TODAY. THIS WET AND WINDY PATTERN WILL CONTINUE THROUGH THURSDAY WHEN WE TRANSITION TO A WARMER AND DRIER PATTERN FOR THE END OF THE WEEK. && .RIW WATCHES/WARNINGS/ADVISORIES... HIGH WIND WARNING FROM 6 PM THIS EVENING TO NOON MDT THURSDAY WYZ002-003-016. WINTER WEATHER ADVISORY FROM NOON TODAY TO 6 AM MDT THURSDAY WYZ001-002. HIGH WIND WARNING FROM NOON TODAY TO 6 PM MDT THURSDAY WYZ019-030. WINTER STORM WATCH FROM THIS EVENING THROUGH THURSDAY AFTERNOON WYZ008-009. WINTER STORM WARNING UNTIL 6 AM MDT THURSDAY WYZ012. && SHORT TERM...BERC LONG TERM...WM AVIATION...AR FIRE WEATHER...BERC
Hazardous weather outlook, Mar 29, 12:47 PM MDT, 14 hours 51 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 1247 PM MDT TUE MAR 29 2011 WYZ001>020-022>030-301100- 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- 1247 PM MDT TUE MAR 29 2011 ...HIGH WIND WATCH FOR THE EASTERN SWEETWATER COUNTY FROM WEDNESDAY AFTERNOON THROUGH THURSDAY AFTERNOON... ...HIGH WIND WATCH WEDNESDAY NIGHT FOR THE EAST SLOPE OF THE ABSAROKA MOUNTAINS AND CODY FOOTHILLS... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY HIGH WINDS WILL BE POSSIBLE ACROSS THE ABSAROKA MOUNTAINS AND CODY FOOTHILLS WEDNESDAY NIGHT AND ACROSS EASTERN SWEETWATER COUNTY WEDNESDAY AFTERNOON THROUGH THURSDAY AFTERNOON. SIGNIFICANT SNOWFALL IS POSSIBLE IN THE WESTERN MOUNTAINS WEDNESDAY INTO WEDNESDAY NIGHT...ESPECIALLY THE TETONS WITH SNOWFALL OF 6 TO 12 INCHES POSSIBLE. A STORM SYSTEM WILL AFFECT THE REGION THIS WEEKEND. AT THIS TIME...IT HAS THE POTENTIAL TO PRODUCE SIGNIFICANT SNOWFALL OVER PORTIONS OF WESTERN AND CENTRAL WYOMING...MAINLY SATURDAY NIGHT THROUGH SUNDAY EVENING. A STRONG COLD FRONT IS EXPECTED TO PUSH ACROSS THE COWBOY STATE SATURDAY NIGHT AND SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. TEAM RIVERTON
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 3:38 AM MDT | Winter Weather Advisory | RIW | Fremont, Hot Springs, Park, Teton | 23 hr |
| Mar 30, 3:51 AM MDT | High Wind Warning | RIW | Fremont, Hot Springs, Johnson, Natrona, Park, Sweetwater | 42 hr |
| Mar 30, 6:32 AM MDT | Winter Storm Watch | RIW | Big Horn, Fremont, Johnson, Natrona, Washakie | 7 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.