Alert archive / Wyoming / Winter Storm Warnings in 2011
Winter Storm Warning 2, NWS Riverton, WY
NWS Riverton, WY issued this winter storm warning at Jan 16, 2011, 2:41 AM MST for 4 counties in Wyoming. It took effect at Jan 16, 2011, 3:00 AM MST. It was in force for 30 hr. 52 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
- Jan 16, 2011, 2:41 AM MST (09:41 UTC)
- In effect from
- Jan 16, 2011, 3:00 AM MST
- Expired
- Jan 17, 2011, 9:20 AM MST
- In force
- 30 hr
- Issued by
- NWS Riverton, WY
Counties Fremont County, WY, Lincoln County, WY, Sublette County, WY, Teton County, WY
The radar
The Riverton/Lander radar (KRIW), 120 km from the middle of the area, began a volume at 09:39 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 16, 10:22 AM MST | SNOW 3.7 | 1 Se Thayne, WY | |
| Jan 16, 10:24 AM MST | HEAVY SNOW 7 | Grand Targhee Ski Area, WY | |
| Jan 16, 10:26 AM MST | SNOW 2 | 1 S Jackson, WY | SNOW KING SKI AREA |
| Jan 16, 10:26 AM MST | SNOW 3 | 23 Nw Dubois, WY | BROOKS LAKE LODGE |
| Jan 16, 12:00 PM MST | SNOW 5 | 5 Ene Driggs, WY | OVERNIGHT SNOWFALL AMOUNT RECORDED AT 6AM. |
| Jan 16, 1:49 PM MST | SNOW 1 | Alpine, WY | |
| Jan 16, 1:50 PM MST | SNOW 0.25 | Jackson, WY | |
| Jan 16, 1:50 PM MST | HEAVY SNOW 6 | Moose, WY | |
| Jan 16, 1:51 PM MST | SNOW 3 | Alpine, WY | |
| Jan 16, 1:51 PM MST | SNOW 5 | 1 Se Thayne, WY | |
| Jan 16, 1:57 PM MST | SNOW 5 | 8 Nne Moran Junction, WY | BASE CAMP SNOTEL |
| Jan 16, 1:57 PM MST | HEAVY SNOW 12 | 8 W South Entrance, WY | GRASSY LAKE SNOTEL |
| Jan 16, 1:58 PM MST | SNOW 3 | 17 E Afton, WY | TRIPLE PEAK SNOTEL |
| Jan 16, 1:58 PM MST | SNOW 3 | 26 N Kemmerer, WY | HAMS FORK SNOTEL |
| Jan 16, 1:58 PM MST | SNOW 4 | 15 Nne Cokeville, WY | KELLEY RANGER STATION SNOTEL |
| Jan 16, 1:58 PM MST | HEAVY SNOW 7 | 8 Ne Afton, WY | WILLOW CREEK SNOTEL |
| Jan 16, 2:14 PM MST | SNOW 2.5 | 3 Se Bedford, WY | |
| Jan 16, 4:29 PM MST | SNOW 0.5 | Pinedale, WY | |
| Jan 16, 4:29 PM MST | SNOW 3 | 3 Ene Bondurant, WY | |
| Jan 16, 4:33 PM MST | SNOW 5 | 17.2 E Thayne, WY | BLIND BULL SUMMIT |
| Jan 16, 4:35 PM MST | SNOW 3 | 14.3 E Thayne, WY | BOX Y RANCH |
| Jan 16, 4:38 PM MST | HEAVY SNOW 12 | 9.9 Nnw Jackson, WY | JACKSON HOLE-RAYMER |
| Jan 16, 4:39 PM MST | SNOW 4 | Togwotee Mountain Lodge, WY | |
| Jan 16, 4:40 PM MST | SNOW 3 | 8.6 Nnw Jackson, WY | JACKSON HOLE-BASE |
| Jan 16, 4:41 PM MST | HEAVY SNOW 9 | 9.3 Nnw Jackson, WY | JACKSON HOLE-MID |
| Jan 16, 6:49 PM MST | SNOW 2 | 11 N Dubois, WY | BURROUGHS CREEK SNOTEL |
| Jan 16, 6:52 PM MST | HEAVY SNOW 6 | 10 N Bondurant, WY | GRANITE CREEK SNOTEL |
| Jan 16, 6:52 PM MST | HEAVY SNOW 6 | 8 Nne Moran Junction, WY | BASE CAMP SNOTEL |
| Jan 16, 6:52 PM MST | HEAVY SNOW 8 | 6 Ene Alta, WY | GRAND TARGHEE SNOTEL |
| Jan 16, 6:53 PM MST | SNOW 1 | 20 Ne Bondurant, WY | GROS VENTRE SUMMIT SNOTEL |
| Jan 16, 6:53 PM MST | SNOW 4 | 14 E Bondurant, WY | LOOMIS PARK SNOTEL |
| Jan 16, 6:53 PM MST | HEAVY SNOW 7 | 8 Wnw Jackson, WY | PHILLIPS BENCH SNOTEL |
| Jan 16, 6:53 PM MST | HEAVY SNOW 9 | South Entrance, WY | SNAKE RIVER STN SNOTEL |
| Jan 16, 6:53 PM MST | HEAVY SNOW 15 | 8 W South Entrance, WY | GRASSY LAKE SNOTEL |
| Jan 16, 6:54 PM MST | SNOW 1 | 12 N Cora, WY | NEW FORK LAKE SNOTEL |
| Jan 16, 6:54 PM MST | SNOW 1 | 16 E Boulder, WY | POCKET CREEK SNOTEL |
| Jan 16, 6:54 PM MST | SNOW 2 | 12 Nne Pinedale, WY | ELKHART PARK G.S. SNOTEL |
| Jan 16, 6:54 PM MST | SNOW 2 | 22 N Cora, WY | KENDALL RANGER STATION SNOTEL |
| Jan 16, 6:54 PM MST | SNOW 2 | 24 Ese Boulder, WY | BIG SANDY OPENING SNOTEL |
| Jan 16, 6:54 PM MST | SNOW 4 | 16 Sw Dubois, WY | GUNSITE PASS SNOTEL |
| Jan 16, 6:55 PM MST | HEAVY SNOW 6 | 25 Mw Dubois, WY | TOGWOTEE PASS SNOTEL |
| Jan 16, 7:00 PM MST | HEAVY SNOW 6 | 19 Sw Bondurant, WY | BLIND BULL SUMMIT SNOTEL |
| Jan 16, 7:00 PM MST | HEAVY SNOW 9 | 36 N Kemmerer, WY | INDIAN CREEK SNOTEL |
| Jan 16, 7:00 PM MST | HEAVY SNOW 10 | 8 Se Afton, WY | COTTONWOOD CREEK SNOTEL |
| Jan 16, 7:01 PM MST | SNOW 5 | 21 W Big Piney, WY | SNIDER BASIN SNOTEL |
| Jan 16, 7:01 PM MST | HEAVY SNOW 6 | 15 Nne Cokeville, WY | KELLEY RANGER STATION SNOTEL |
| Jan 16, 7:01 PM MST | HEAVY SNOW 9 | 15 S Afton, WY | SALT RIVER SUMMIT SNOTEL |
| Jan 16, 7:01 PM MST | HEAVY SNOW 12 | 19 Se Afton, WY | SPRING CREEK DIVIDE SNOTEL |
| Jan 16, 7:02 PM MST | HEAVY SNOW 7 | 17 E Afton, WY | TRIPLE PEAK SNOTEL |
| Jan 16, 7:02 PM MST | HEAVY SNOW 12 | 8 Ne Afton, WY | WILLOW CREEK SNOTEL |
| Jan 16, 7:03 PM MST | SNOW 4 | 12 Ese Bondurant, WY | EAST RIM DIVIDE SNOTEL |
| Jan 16, 9:18 PM MST | SNOW 3 | 1 Nnw Alta, WY |
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, 9.7 hours before the alert went out and 126 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
- 2492 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
354 WWUS45 KRIW 160941 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 241 AM MST SUN JAN 16 2011 ...POTENTIAL MAJOR WINTER STORM HEADED TOWARDS THE FAR WEST MOUNTAINS SUNDAY... .A STRONG JET STREAK WILL ALLOW SEVERAL MOIST WEATHER DISTURBANCES TO IMPACT THE WEST SUNDAY THROUGH MONDAY WITH THE POTENTIAL FOR HEAVY SNOW. SNOWFALL WILL INCREASE IN COVERAGE AND INTENSITY THIS MORNING AND LIKELY CONTINUE THROUGH MONDAY. STRONG MOUNTAIN TOP WINDS ARE ALSO EXPECTED TO DEVELOP SUNDAY AFTERNOON THROUGH MONDAY MORNING WHICH WILL LIKELY CAUSE AREAS OF BLOWING AND DRIFTING SNOW AT PEAK AND PASS LEVEL. WYZ012-162300- /O.UPG.KRIW.WS.A.0002.110116T1000Z-110118T0000Z/ /O.NEW.KRIW.WS.W.0002.110116T1000Z-110118T0000Z/ TETON AND GROS VENTRE MOUNTAINS- 241 AM MST SUN JAN 16 2011 ...WINTER STORM WARNING IN EFFECT UNTIL 5 PM MST MONDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT UNTIL 5 PM MST MONDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * SUMMARY AND TIMING...SNOW WILL INCREASE IN COVERAGE AND INTENSITY THROUGH THE MORNING HOURS. THE SNOW MAY BE HEAVY AT TIMES TODAY INTO TONIGHT ALONG WITH INCREASING WIND LATE IN THE DAY. LIGHT TO MODERATE SNOW WILL CONTINUE LATE SUNDAY NIGHT THROUGH MONDAY. * SNOW ACCUMULATIONS...8 TO 16 INCHES WITH LOCALLY HIGHER AMOUNTS. * WIND AND VISIBILITY...WEST WINDS WILL GRADUALLY INCREASE DURING THE DAY AND PEAK TONIGHT. WEST WINDS OF 25 TO 35 MPH WILL BE COMMON WITH GUSTS OVER 50 MPH POSSIBLE AT PASS LEVEL SUNDAY AFTERNOON AND EVENING. VISIBILITIES MAY BE REDUCED UNDER ONE QUARTER MILE AT TIMES IN SNOW AND BLOWING SNOW. * IMPACTS...TRAVEL OVER TETON AND TOGWOTEE PASS MAY BE SEVERELY HAMPERED DUE TO PERIODS OF HEAVY SNOW AND STRONG WEST WINDS. TAKE NECESSARY PRECAUTIONS IF TRAVEL IS NECESSARY THROUGH MONDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR HAZARDOUS WINTER WEATHER IN AND CLOSE TO THE WATCH AREA. && 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. && $$ WYZ024-162300- /O.UPG.KRIW.WS.A.0002.110116T1000Z-110118T0000Z/ /O.NEW.KRIW.WS.W.0002.110116T1000Z-110118T0000Z/ SALT RIVER AND WYOMING RANGES- 241 AM MST SUN JAN 16 2011 ...WINTER STORM WARNING IN EFFECT UNTIL 5 PM MST MONDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT UNTIL 5 PM MST MONDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * SUMMARY AND TIMING...SNOW WILL INCREASE IN INTENSITY AND COVERAGE THIS MORNING. THE SNOW MAY BE HEAVY AT TIMES TODAY INTO TONIGHT ALONG WITH INCREASING WIND LATE IN THE DAY. LIGHT TO MODERATE SNOW WILL CONTINUE LATE SUNDAY NIGHT THROUGH MONDAY. * SNOW ACCUMULATIONS...8 TO 16 INCHES WITH LOCALLY HIGHER AMOUNTS. * WIND AND VISIBILITY...WEST WINDS WILL GRADUALLY INCREASE DURING THE DAY AND PEAK TONIGHT. WEST WINDS OF 25 TO 35 MPH WILL BE COMMON WITH GUSTS OF 50 TO 60 MPH POSSIBLE OVER THE PEAKS THIS AFTERNOON THROUGH TONIGHT. VISIBILITIES MAY BE REDUCED UNDER ONE QUARTER MILE AT TIMES IN SNOW AND BLOWING SNOW. * IMPACTS...OUTDOOR ACTIVITIES IN THE BACK COUNTRY WILL LIKELY BE SEVERELY HAMPERED BY HEAVY...WET SNOW AT TIMES AND SHARPLY REDUCED VISIBILITY IN SNOW AND BLOWING SNOW. TAKE THE NECESSARY PRECAUTIONS IF TRAVEL IS NECESSARY ACROSS THE SALT OR WYOMING RANGES THROUGH MONDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR HAZARDOUS WINTER WEATHER IN AND CLOSE TO THE WATCH AREA. && PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ WYZ001-162300- /O.NEW.KRIW.WW.Y.0002.110116T1000Z-110118T0000Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 241 AM MST SUN JAN 16 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST MONDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...LIGHT SNOW WILL INCREASE IN COVERAGE AND INTENSITY THIS MORNING AND WILL LAST INTO MONDAY AFTERNOON. THE HEAVIEST SNOW WILL FALL THIS AFTERNOON AND EVENING. * SNOW ACCUMULATIONS...6 TO 10 INCHES OF SNOW ARE LIKELY ACROSS MOST OF THE AREA. THE SOUTHWEST CORNER OF YELLOWSTONE NATIONAL PARK WILL RECEIVE 8 TO 14 INCHES OF SNOW WITH A LITTLE MORE IN LOCALLY FAVORED AREAS. * WIND AND VISIBILITY...WEST WINDS WILL GRADUALLY INCREASE DURING THE DAY AND PEAK TONIGHT. WEST WINDS OF 25 TO 35 MPH WILL BE COMMON WITH GUSTS UP TO 50 MPH POSSIBLE OVER THE PEAKS THIS AFTERNOON THROUGH TONIGHT. VISIBILITIES MAY BE REDUCED UNDER ONE QUARTER MILE AT TIMES IN SNOW AND BLOWING SNOW. * IMPACTS...OUTDOOR ACTIVITIES IN THE BACK COUNTRY WILL LIKELY BE HAMPERED BY HEAVY...WET SNOW AT TIMES AND REDUCED VISIBILITY IN SNOW AND BLOWING SNOW. TAKE THE NECESSARY PRECAUTIONS IF TRAVEL IS NECESSARY THROUGH MONDAY. 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. && $$ WYZ013-162300- /O.NEW.KRIW.WW.Y.0002.110116T1000Z-110118T0000Z/ JACKSON HOLE- INCLUDING THE CITY OF...JACKSON 241 AM MST SUN JAN 16 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST MONDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOWFALL...WHICH IS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...SNOW WILL DEVELOP IN MUCH OF THE VALLEY THIS MORNING AND INCREASE IN INTENSITY DURING THE AFTERNOON AND EVENING HOURS. THE JACKSON AREA WILL SEE A RAIN/SNOW MIX MUCH OF THE DAY WITH ANY SNOW ACCUMULATION OCCURRING LATE TONIGHT AND MONDAY. * SNOW ACCUMULATIONS...3 TO 6 INCHES IN NORTHERN PORTIONS OF THE VALLEY AND 1 TO 3 INCHES AROUND JACKSON. * WIND AND VISIBILITY...PREDOMINANTLY SOUTHERLY AT 10 TO 15 MPH * IMPACTS...TRAVEL BETWEEN JACKSON HOLE AIRPORT AND MORAN JUNCTION WILL BE AFFECTED BY PERIODS OF MODERATE TO HEAVY SNOW AND REDUCED VISIBILITY. BE PREPARED FOR SLICK ROADS IF YOU MUST TRAVEL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
5 follow-up statements
875 WWUS45 KRIW 161705 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 1005 AM MST SUN JAN 16 2011 ...MAJOR WINTER STORM WILL CONTINUE THROUGH MONDAY... .A STRONG UPPER LEVEL JET STREAK WILL ALLOW SEVERAL MOIST WEATHER DISTURBANCES TO IMPACT WESTERN WYOMING TODAY THROUGH MONDAY WITH THE POTENTIAL FOR HEAVY SNOW. SNOWFALL HAS INCREASED IN COVERAGE AND INTENSITY THIS MORNING AND WILL CONTINUE THROUGH MONDAY. STRONG MOUNTAIN TOP WINDS ARE ALSO EXPECTED TO DEVELOP TODAY THROUGH MONDAY MORNING WHICH WILL LIKELY CAUSE AREAS OF BLOWING AND DRIFTING SNOW AT PEAK AND PASS LEVEL. WYZ012-170115- /O.CON.KRIW.WS.W.0002.000000T0000Z-110118T0000Z/ TETON AND GROS VENTRE MOUNTAINS- 1005 AM MST SUN JAN 16 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...SNOW WILL CONTINUE...OCCASIONALLY HEAVY IN INTENSITY...THROUGH THIS EVENING. WEST WINDS WILL INCREASING THROUGH TONIGHT. LIGHT TO MODERATE SNOW WILL CONTINUE LATE TONIGHT THROUGH MONDAY. * SNOW ACCUMULATIONS...5 TO 7 INCHES OF SNOWFALL HAS OCCURRED SO FAR WITH THIS STORM SINCE LAST NIGHT ABOVE 8000 FEET. BELOW 8000 FEET 2 TO 5 INCHES HAS FALLEN. A SNOW TOTAL OF 8 TO 16 INCHES IS EXPECTED WITH LOCALLY HIGHER AMOUNTS. * WIND AND VISIBILITY...WEST WINDS WILL GRADUALLY INCREASE DURING THE DAY AND PEAK TONIGHT. WEST WINDS OF 25 TO 35 MPH WILL BE COMMON WITH GUSTS TO 45 MPH AT PASS LEVEL AND ON THE SUMMITS. TONIGHT EXPECT WEST WINDS OF 35 TO 45 MPH WITH SOME GUSTS TO 55 MPH AT PASS LEVEL AND ON THE SUMMITS TONIGHT. VISIBILITIES MAY BE REDUCED UNDER ONE QUARTER MILE AT TIMES IN SNOW AND BLOWING SNOW. * IMPACTS...TRAVEL OVER TETON AND TOGWOTEE PASS MAY BE SEVERELY HAMPERED DUE TO PERIODS OF HEAVY SNOW AND STRONG WEST WINDS. TAKE NECESSARY PRECAUTIONS IF TRAVEL IS NECESSARY THROUGH MONDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR HAZARDOUS WINTER WEATHER IN AND CLOSE TO THE WATCH AREA. 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. && $$ WYZ024-170115- /O.CON.KRIW.WS.W.0002.000000T0000Z-110118T0000Z/ SALT RIVER AND WYOMING RANGES- 1005 AM MST SUN JAN 16 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...SNOW WILL CONTINUE...OCCASIONALLY HEAVY IN INTENSITY...THROUGH THIS EVENING. WEST WINDS WILL INCREASING THROUGH TONIGHT. LIGHT TO MODERATE SNOW WILL CONTINUE LATE TONIGHT THROUGH MONDAY. * SNOW ACCUMULATIONS...UP TO 3 INCHES OF SNOWFALL HAVE FALLEN SO FAR SINCE LAST NIGHT. EXPECT A SNOW TOTAL OF 8 TO 16 INCHES WITH LOCALLY HIGHER AMOUNTS. * WIND AND VISIBILITY...WEST WINDS WILL GRADUALLY INCREASE DURING THE DAY AND PEAK TONIGHT. WEST WINDS OF 25 TO 35 MPH WILL BE COMMON WITH GUSTS TO 45 MPH AT PASS LEVEL AND ON THE SUMMITS. TONIGHT EXPECT WEST WINDS OF 35 TO 45 MPH WITH SOME GUSTS TO 55 MPH TO 60 MPH ON THE SUMMITS TONIGHT. VISIBILITIES MAY BE REDUCED UNDER ONE QUARTER MILE AT TIMES IN SNOW AND BLOWING SNOW INCLUDING SALT RIVER PASS. * IMPACTS...OUTDOOR ACTIVITIES IN THE BACK COUNTRY WILL LIKELY BE SEVERELY HAMPERED BY HEAVY...WET SNOW AT TIMES AND SHARPLY REDUCED VISIBILITY IN SNOW AND BLOWING SNOW. TAKE THE NECESSARY PRECAUTIONS IF TRAVEL IS NECESSARY ACROSS THE SALT OR WYOMING RANGES THROUGH MONDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A WINTER STORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR HAZARDOUS WINTER WEATHER IN AND CLOSE TO THE WATCH AREA. A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ WYZ001-170115- /O.CON.KRIW.WW.Y.0002.000000T0000Z-110118T0000Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 1005 AM MST SUN JAN 16 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...SNOW WILL CONTINUE...OCCASIONALLY HEAVY IN INTENSITY...THROUGH THIS EVENING. WEST WINDS WILL INCREASING THROUGH TONIGHT. LIGHT TO MODERATE SNOW WILL CONTINUE LATE TONIGHT THROUGH MONDAY. * SNOW ACCUMULATIONS...UP TO 5 INCHES OF SNOW HAVE FALLEN SO FAR IN THE SOUTHWEST PORTION OF THE PARK. A SNOW TOTAL OF 6 TO 10 INCHES OF SNOW ARE LIKELY ACROSS MOST OF THE AREA. THE SOUTHWEST CORNER OF YELLOWSTONE NATIONAL PARK WILL RECEIVE 8 TO 14 INCHES OF SNOW WITH A LITTLE MORE IN LOCALLY FAVORED AREAS. * WIND AND VISIBILITY...WEST WINDS WILL GRADUALLY INCREASE DURING THE DAY AND PEAK TONIGHT. WEST WINDS OF 25 TO 35 MPH WILL BE COMMON WITH GUSTS UP TO 50 MPH POSSIBLE OVER THE PEAKS THIS AFTERNOON THROUGH TONIGHT. VISIBILITIES MAY BE REDUCED UNDER ONE QUARTER MILE AT TIMES IN SNOW AND BLOWING SNOW. * IMPACTS...OUTDOOR ACTIVITIES IN THE BACK COUNTRY WILL LIKELY BE HAMPERED BY HEAVY...WET SNOW AT TIMES AND REDUCED VISIBILITY IN SNOW AND BLOWING SNOW. TAKE THE NECESSARY PRECAUTIONS IF TRAVEL IS NECESSARY THROUGH MONDAY. 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. && $$ WYZ013-170115- /O.CON.KRIW.WW.Y.0002.000000T0000Z-110118T0000Z/ JACKSON HOLE- INCLUDING THE CITY OF...JACKSON 1005 AM MST SUN JAN 16 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...SNOW WILL CONTINUE...OCCASIONALLY HEAVY IN INTENSITY...THROUGH THIS EVENING. WEST WINDS WILL INCREASING THROUGH TONIGHT. LIGHT TO MODERATE SNOW WILL CONTINUE LATE TONIGHT THROUGH MONDAY. * SNOW ACCUMULATIONS...2 INCHES OF SNOW HAVE FALLEN SO FAR ACROSS THE SOUTHERN PORTION OF THE VALLEY WITH UP TO 4 INCHES ACROSS THE NORTHERN PORTION OF THE VALLEY. A TOTAL OF 3 TO 6 INCHES OF SNOW IS EXPECTED IN THE NORTHERN PORTIONS OF THE VALLEY AND 1 TO 3 INCHES AROUND JACKSON. * WIND AND VISIBILITY...PREDOMINANTLY SOUTHERLY AT 10 TO 15 MPH * IMPACTS...TRAVEL BETWEEN JACKSON HOLE AIRPORT AND MORAN JUNCTION WILL BE AFFECTED BY PERIODS OF MODERATE TO HEAVY SNOW AND REDUCED VISIBILITY. BE PREPARED FOR SLICK ROADS IF YOU MUST TRAVEL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
915 WWUS45 KRIW 162241 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 341 PM MST SUN JAN 16 2011 ...MAJOR WINTER STORM WILL CONTINUE THROUGH MONDAY... .A STRONG UPPER LEVEL JET STREAK WILL ALLOW SEVERAL MOIST WEATHER DISTURBANCES TO IMPACT WESTERN WYOMING TONIGHT THROUGH MONDAY WITH THE POTENTIAL PERIODS OF HEAVY SNOW. STRONG MOUNTAIN TOP WINDS ARE ALSO EXPECTED TONIGHT THROUGH MONDAY MORNING WHICH WILL LIKELY CAUSE AREAS OF BLOWING AND DRIFTING SNOW AT PEAK AND PASS LEVEL. WYZ012-170700- /O.CON.KRIW.WS.W.0002.000000T0000Z-110118T0000Z/ TETON AND GROS VENTRE MOUNTAINS- 341 PM MST SUN JAN 16 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...SNOW WILL CONTINUE...OCCASIONALLY HEAVY IN INTENSITY...THROUGH THIS EVENING. WEST WINDS WILL INCREASING THROUGH TONIGHT. LIGHT TO MODERATE SNOW WILL CONTINUE LATE TONIGHT THROUGH MONDAY. * SNOW ACCUMULATIONS...6 TO 9 INCHES OF SNOWFALL HAS OCCURRED SO FAR WITH THIS STORM SINCE LAST NIGHT ABOVE 8000 FEET. BELOW 8000 FEET 2 TO 5 INCHES HAS FALLEN. A SNOW TOTAL OF 10 TO 20 INCHES IS EXPECTED WITH LOCALLY HIGHER AMOUNTS. * WIND AND VISIBILITY...WEST WINDS WILL CONTINUE TO INCREASE THIS EVENING AND PEAK TONIGHT. WEST WINDS WILL INCREASE TO 35 TO 45 MPH WITH SOME GUSTS TO 55 MPH AT PASS LEVEL AND ON THE SUMMITS TONIGHT. VISIBILITIES MAY BE REDUCED UNDER ONE QUARTER MILE AT TIMES IN SNOW AND BLOWING SNOW. * IMPACTS...TRAVEL OVER TETON AND TOGWOTEE PASS MAY BE SEVERELY HAMPERED DUE TO PERIODS OF HEAVY SNOW AND STRONG WEST WINDS. TAKE NECESSARY PRECAUTIONS IF TRAVEL IS NECESSARY THROUGH MONDAY. 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. && $$ WYZ024-170700- /O.CON.KRIW.WS.W.0002.000000T0000Z-110118T0000Z/ SALT RIVER AND WYOMING RANGES- 341 PM MST SUN JAN 16 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...SNOW WILL CONTINUE...OCCASIONALLY HEAVY IN INTENSITY...THROUGH THIS EVENING. WEST WINDS WILL INCREASING THROUGH TONIGHT. LIGHT TO MODERATE SNOW WILL CONTINUE LATE TONIGHT THROUGH MONDAY. * SNOW ACCUMULATIONS...MAINLY UP TO 3 INCHES OF SNOWFALL HAVE FALLEN SO FAR SINCE LAST NIGHT WITH LOCAL AMOUNTS OF 7 INCHES OVER THE NORTHWEST PORTION OF THE SALT RIVER RANGE.`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
101 WWUS45 KRIW 170608 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 1108 PM MST SUN JAN 16 2011 ...MAJOR WINTER STORM WILL CONTINUE THROUGH MONDAY... .A STRONG UPPER LEVEL JET STREAM WILL ALLOW SEVERAL MOIST WEATHER DISTURBANCES TO IMPACT WESTERN WYOMING THROUGH MONDAY. THIS WILL BRING PERIODS OF MODERATE TO HEAVY SNOW TO THE WESTERN MOUNTAINS. STRONG MOUNTAIN TOP WINDS ARE ALSO EXPECTED THROUGH MONDAY MORNING WHICH WILL CAUSE BLOWING AND DRIFTING SNOW AT PEAK AND PASS LEVEL. WYZ012-171415- /O.CON.KRIW.WS.W.0002.000000T0000Z-110118T0000Z/ TETON AND GROS VENTRE MOUNTAINS- 1108 PM MST SUN JAN 16 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...SNOW WILL CONTINUE...MODERATE TO HEAVY AT TIMES...THROUGH MONDAY MORNING. LIGHT TO MODERATE SNOW WILL CONTINUE MONDAY AFTERNOON. * SNOW ACCUMULATIONS...8 TO 12 INCHES OF SNOW HAS OCCURRED SO FAR ABOVE 8000 FEET. BELOW 8000 FEET 3 TO 7 INCHES HAS FALLEN. A STORM TOTAL SNOWFALL WILL RANGE FROM 10 TO 20 INCHES WITH LOCALLY HIGHER AMOUNTS. * WIND AND VISIBILITY...WEST WIND OF 35 TO 45 MPH WITH GUSTS AROUND 60 MPH WILL OCCUR AT PASS LEVEL AND ON THE SUMMITS. VISIBILITIES WILL BE QUITE LOW IN SNOW AND BLOWING SNOW. * IMPACTS...TRAVEL OVER TETON AND TOGWOTEE PASS WILL BE HAZARDOUS LATE TONIGHT AND MONDAY. TAKE NECESSARY PRECAUTIONS IF TRAVEL IS NECESSARY ON MONDAY. 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. && $$ WYZ024-171415- /O.CON.KRIW.WS.W.0002.000000T0000Z-110118T0000Z/ SALT RIVER AND WYOMING RANGES- 1108 PM MST SUN JAN 16 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...SNOW WILL CONTINUE...MODERATE TO HEAVY AT TIMES THROUGH MONDAY MORNING. LIGHT TO MODERATE SNOW WILL CONTINUE MONDAY AFTERNOON. * SNOW ACCUMULATIONS...SNOWFALL OF 6 TO 12 INCHES HAS FALLEN ABOVE 8000 FEET. SNOWFALL OF 2 TO 5 INCHES HAS OCCURRED BELOW 8000 FEET. STORM TOTAL SNOWFALL OF 10 TO 18 INCHES IS EXPECTED WITH LOCALLY HIGHER AMOUNTS. * WIND AND VISIBILITY...WEST WIND OF 30 TO 40 MPH WITH GUSTS TO 60 MPH ARE LIKELY ON THE SUMMITS TONIGHT AND MONDAY MORNING. VISIBILITIES WILL BE QUITE LOW IN SNOW AND BLOWING SNOW INCLUDING SALT RIVER PASS. * IMPACTS...OUTDOOR ACTIVITIES IN THE BACK COUNTRY WILL LIKELY BE SEVERELY HAMPERED BY THE SNOW AND BLOWING SNOW. TAKE ALL NECESSARY PRECAUTIONS BEFORE VENTURING OUT. 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. && $$ WYZ001-171415- /O.CON.KRIW.WW.Y.0002.000000T0000Z-110118T0000Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 1108 PM MST SUN JAN 16 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...SNOW WILL CONTINUE...MODERATE TO HEAVY AT TIMES...THROUGH MONDAY MORNING. LIGHT TO MODERATE SNOW WILL OCCUR MONDAY AFTERNOON. * SNOW ACCUMULATIONS...SNOWFALL HAS RANGED FROM 5 TO 10 INCHES IN THE HIGHER ELEVATIONS WITH LOCALLY HIGHER AMOUNTS IN THE SOUTHWEST PORTION OF THE PARK. IN THE NORTH PART OF THE PARK SNOWFALL HAS BEEN MIXED WITH RAIN WITH MINOR ACCUMULATIONS. * STORM TOTAL SNOWFALL...10 TO 18 INCHES IN THE HIGHER ELEVATIONS AND THE SOUTH PORTION OF THE PARK. ELSEWHERE...ACCUMULATIONS OF 3 TO 7 INCHES IS EXPECTED. * WIND AND VISIBILITY...AREAS OF WEST WIND 15 TO 25 MPH WILL OCCUR IN OPEN SPACES. THIS WILL CAUSE DRIFTING SNOW. VISIBILITY WILL BE LOW AT TIMES IN HEAVIER BURSTS OF SNOW. * IMPACTS...TAKE ALL NECESSARY PRECAUTIONS IF PLANNING OUTDOOR ACTIVITIES IN THE PARK MONDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ013-171415- /O.CON.KRIW.WW.Y.0002.000000T0000Z-110118T0000Z/ JACKSON HOLE- INCLUDING THE CITY OF...JACKSON 1108 PM MST SUN JAN 16 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...SNOW WILL CONTINUE...MODERATE AT TIMES... NORTH OF JACKSON FROM NEAR MOOSE TO YELLOWSTONE NATIONAL PARK. RAIN WILL OCCUR IN THE TOWN OF JACKSON...TURNING BACK TO SNOW BY MIDDAY MONDAY. * SNOW ACCUMULATIONS...5 TO 6 INCHES OF SNOW HAS FALLEN FROM NEAR MOOSE TO THE SOUTH ENTRANCE OF YELLOWSTONE NATIONAL PARK. LITTLE OR NO ACCUMULATION HAS OCCURRED IN THE TOWN OF JACKSON. STORM TOTAL SNOWFALL WILL RANGE FROM 6 TO 9 INCHES IN THE NORTHERN PART OF THE VALLEY. IN THE TOWN OF JACKSON 1 TO 3 INCHES OF SNOW IS EXPECTED BY LATE MONDAY AFTERNOON. * WIND AND VISIBILITY...SOUTH AT 10 TO 20 MPH WITH HIGHER GUSTS NORTH OF JACKSON. EXPECT SOME DRIFTING SNOW IN OPEN AREAS AND LOW VISIBILITY. * IMPACTS...TRAVEL BETWEEN JACKSON HOLE AIRPORT AND MORAN JUNCTION WILL BE IMPACTED BY PERIODS OF MODERATE SNOW AND LOW VISIBILITY. BE PREPARED FOR SLICK ROADS. 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. && $$ WYZ025-171415- /O.CON.KRIW.WW.Y.0002.000000T0000Z-110118T0000Z/ UPPER GREEN RIVER BASIN FOOTHILLS- INCLUDING THE CITY OF...PINEDALE 1108 PM MST SUN JAN 16 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST MONDAY. * SUMMARY AND TIMING...SNOW WILL CONTINUE...MODERATE AT TIMES... THROUGH MONDAY. * SNOW ACCUMULATIONS...3 INCHES OF SNOW HAVE FALLEN SO FAR IN BONDURANT. LESS THAN AN INCH OF SNOW HAS OCCURRED AT PINEDALE. TOTAL OF 6 INCHES OF SNOW IS EXPECTED AROUND BONDURANT WITH 2 TO 3 INCHES IN PINEDALE BY EARLY MONDAY EVENING. * WIND AND VISIBILITY...BECOMING NORTHWEST AT 10 TO 20 MPH MONDAY MORNING WITH GUSTS TO 25 MPH BY AFTERNOON. EXPECT DRIFTING SNOW IN OPEN SPACES. * IMPACTS...TRAVEL BETWEEN PINEDALE AND BONDURANT...UP TO THE HOBACK CANYON WILL BE IMPACTED BY SNOW. BE PREPARED FOR SNOW PACKED AND SLICK ROADS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
422 WWUS45 KRIW 170926 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 226 AM MST MON JAN 17 2011 ...WINTER STORM WILL CONTINUE THROUGH THIS AFTERNOON... .A STRONG UPPER LEVEL JET STREAM WILL ALLOW SEVERAL MOIST WEATHER DISTURBANCES TO IMPACT WESTERN WYOMING THROUGH THIS AFTERNOON. THIS WILL BRING PERIODS OF MODERATE TO HEAVY SNOW TO THE WESTERN MOUNTAINS. STRONG MOUNTAIN TOP WINDS ARE ALSO EXPECTED THROUGH MIDDAY WHICH WILL CAUSE BLOWING AND DRIFTING SNOW AT PEAK AND PASS LEVEL. WYZ012-171730- /O.CON.KRIW.WS.W.0002.000000T0000Z-110118T0000Z/ TETON AND GROS VENTRE MOUNTAINS- 226 AM MST MON JAN 17 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...SNOW WILL CONTINUE...MODERATE TO HEAVY AT TIMES...THROUGH MIDDAY. LIGHT TO MODERATE SNOW WILL CONTINUE THIS AFTERNOON. * SNOW ACCUMULATIONS...8 TO 12 INCHES OF SNOW HAS OCCURRED SO FAR ABOVE 8000 FEET. BELOW 8000 FEET 3 TO 7 INCHES HAS FALLEN. A STORM TOTAL SNOWFALL WILL RANGE FROM 10 TO 18 INCHES WITH LOCALLY HIGHER AMOUNTS. * WIND AND VISIBILITY...WEST WIND OF 35 TO 45 MPH WITH GUSTS AROUND 60 MPH WILL OCCUR AT PASS LEVEL AND ON THE SUMMITS. VISIBILITIES WILL BE QUITE LOW IN SNOW AND BLOWING SNOW. * IMPACTS...TRAVEL OVER TETON AND TOGWOTEE PASS WILL BE HAZARDOUS TODAY. TAKE NECESSARY PRECAUTIONS IF TRAVEL IS NECESSARY. 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. && $$ WYZ024-171730- /O.CON.KRIW.WS.W.0002.000000T0000Z-110118T0000Z/ SALT RIVER AND WYOMING RANGES- 226 AM MST MON JAN 17 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...SNOW WILL CONTINUE...MODERATE TO HEAVY AT TIMES THROUGH MIDDAY. LIGHT TO MODERATE SNOW WILL CONTINUE THROUGH THE AFTERNOON. * SNOW ACCUMULATIONS...SNOWFALL OF 6 TO 12 INCHES HAS FALLEN ABOVE 8000 FEET. SNOWFALL OF 2 TO 5 INCHES HAS OCCURRED BELOW 8000 FEET. STORM TOTAL SNOWFALL OF 10 TO 18 INCHES IS EXPECTED WITH LOCALLY HIGHER AMOUNTS. * WIND AND VISIBILITY...WEST WIND OF 30 TO 40 MPH WITH GUSTS TO 60 MPH ARE LIKELY ON THE SUMMITS THROUGH MIDDAY. VISIBILITIES WILL BE QUITE LOW IN SNOW AND BLOWING SNOW INCLUDING SALT RIVER PASS. * IMPACTS...OUTDOOR ACTIVITIES IN THE BACK COUNTRY WILL LIKELY BE SEVERELY HAMPERED BY THE SNOW AND BLOWING SNOW. TAKE ALL NECESSARY PRECAUTIONS BEFORE VENTURING OUT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ WYZ001-171730- /O.CON.KRIW.WW.Y.0002.000000T0000Z-110118T0000Z/ YELLOWSTONE NATIONAL PARK- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL 226 AM MST MON JAN 17 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...SNOW WILL CONTINUE...MODERATE TO HEAVY AT TIMES...THROUGH MIDDAY. LIGHT TO MODERATE SNOW WILL OCCUR THROUGH THE AFTERNOON. * SNOW ACCUMULATIONS...SNOWFALL HAS RANGED FROM 4 TO 8 INCHES IN WITH HIGHER AMOUNTS IN THE SOUTHWEST PORTION OF THE PARK. IN THE NORTH PART OF THE PARK SNOWFALL HAS BEEN MIXED WITH RAIN WITH MINOR ACCUMULATIONS. * STORM TOTAL SNOWFALL...10 TO 18 INCHES IN THE HIGHER ELEVATIONS AND THE SOUTHWEST PORTION OF THE PARK. ELSEWHERE... ACCUMULATIONS OF 5 TO 10 INCHES ARE EXPECTED. * WIND AND VISIBILITY...AREAS OF WEST WIND 15 TO 25 MPH WILL OCCUR IN OPEN SPACES. THIS WILL CAUSE DRIFTING SNOW. VISIBILITY WILL BE LOW AT TIMES IN HEAVIER BURSTS OF SNOW. * IMPACTS...TAKE ALL NECESSARY PRECAUTIONS IF PLANNING OUTDOOR ACTIVITIES IN THE PARK 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. && $$ WYZ013-171730- /O.CON.KRIW.WW.Y.0002.000000T0000Z-110118T0000Z/ JACKSON HOLE- INCLUDING THE CITY OF...JACKSON 226 AM MST MON JAN 17 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...SNOW WILL CONTINUE...MODERATE AT TIMES... NORTH OF JACKSON FROM NEAR MOOSE TO YELLOWSTONE NATIONAL PARK. RAIN WILL OCCUR IN THE TOWN OF JACKSON...TURNING BACK TO SNOW BY MIDDAY. * SNOW ACCUMULATIONS...5 TO 6 INCHES OF SNOW HAS FALLEN FROM NEAR MOOSE TO THE SOUTH ENTRANCE OF YELLOWSTONE NATIONAL PARK. LITTLE OR NO ACCUMULATION HAS OCCURRED IN THE TOWN OF JACKSON. STORM TOTAL SNOWFALL WILL RANGE FROM 6 TO 9 INCHES IN THE NORTHERN PART OF THE VALLEY. IN THE TOWN OF JACKSON 1 TO 3 INCHES OF SNOW IS EXPECTED BY LATE AFTERNOON. * WIND AND VISIBILITY...SOUTH AT 10 TO 20 MPH WITH HIGHER GUSTS NORTH OF JACKSON. EXPECT SOME DRIFTING SNOW IN OPEN AREAS AND LOW VISIBILITY. * IMPACTS...TRAVEL BETWEEN JACKSON HOLE AIRPORT AND MORAN JUNCTION WILL BE IMPACTED BY PERIODS OF MODERATE SNOW AND LOW VISIBILITY. BE PREPARED FOR SLICK ROADS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ025-171730- /O.CON.KRIW.WW.Y.0002.000000T0000Z-110118T0000Z/ UPPER GREEN RIVER BASIN FOOTHILLS- INCLUDING THE CITY OF...PINEDALE 226 AM MST MON JAN 17 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...SNOW WILL CONTINUE...MODERATE AT TIMES... THROUGH THIS AFTERNOON. * SNOW ACCUMULATIONS...3 INCHES OF SNOW HAS FALLEN SO FAR IN BONDURANT. LESS THAN AN INCH OF SNOW HAS OCCURRED AT PINEDALE. TOTAL OF 6 INCHES OF SNOW IS EXPECTED AROUND BONDURANT WITH 2 TO 3 INCHES IN PINEDALE BY EARLY EVENING. * WIND AND VISIBILITY...BECOMING NORTHWEST AT 10 TO 20 MPH WITH GUSTS TO 25 MPH BY AFTERNOON. EXPECT DRIFTING SNOW IN OPEN SPACES. * IMPACTS...TRAVEL BETWEEN PINEDALE AND BONDURANT...UP TO THE HOBACK CANYON WILL BE IMPACTED BY SNOW. BE PREPARED FOR SNOW PACKED AND SLICK ROADS. 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. && $$
493 WWUS45 KRIW 171620 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 920 AM MST MON JAN 17 2011 WYZ012-024-171730- /O.CAN.KRIW.WS.W.0002.000000T0000Z-110118T0000Z/ TETON AND GROS VENTRE MOUNTAINS-SALT RIVER AND WYOMING RANGES- 920 AM MST MON JAN 17 2011 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE WINTER STORM WARNING. ONLY LIGHT SNOW IS EXPECTED TO FALL THE REST OF THE DAY. THEREFORE...THE NATIONAL WEATHER SERVICE HAS CANCELLED THE WINTER STORM WARNING FOR THE AREA. ADDITIONAL SNOWFALL WILL GENERALLY RANGE FROM 1 TO 3 INCHES WITH LOCALLY HIGHER AMOUNTS. SNOWFALL TOTALS FROM THE RECENT STORM VARIED FROM 8 TO 16 INCHES. $$ WYZ001-013-025-171730- /O.CAN.KRIW.WW.Y.0002.000000T0000Z-110118T0000Z/ YELLOWSTONE NATIONAL PARK-JACKSON HOLE- UPPER GREEN RIVER BASIN FOOTHILLS- INCLUDING THE CITIES OF...LAKE...MAMMOTH...OLD FAITHFUL... JACKSON...PINEDALE 920 AM MST MON JAN 17 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE WINTER WEATHER ADVISORY. LITTLE ADDITIONAL SNOWFALL IS EXPECTED TODAY EXCEPT IN THE MOUNTAINS WHERE A FEW MORE INCHES IS QUITE POSSIBLE. THEREFORE...THE WINTER WEATHER ADVISORIES FOR THE AREA HAVE BEEN CANCELLED. OVER A FOOT OF SNOW FELL IN SOME MOUNTAIN LOCATIONS IN YELLOWSTONE NATIONAL PARK WITH 2 TO 6 INCHES ACROSS THE LOWER ELEVATIONS. $$ SKRBAC
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 Jan 15, 2:57 PM MST, 11 hours 44 minutes earlier.
Area forecast discussion, Jan 15, 2:57 PM MST, 11 hours 44 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RIVERTON WY 257 PM MST SAT JAN 15 2011 SHORT TERM...TONIGHT THROUGH TUESDAY MIXING GOING ON IN A LOT OF AREAS TODAY WITH INCREASING PRESSURE GRADIENT...INCREASED CLOUD COVER HAMPERING OVERNIGHT INVERSIONS AND INCREASED LEE TROUGHING WITH ARCTIC BOUNDARY JUST OFF TO THE NE. ALL THE BASINS WARMED AT LEAST INTO THE 30S WITH MANY AREAS WITH ANY BREEZE AT ALL WARMING INTO THE 40S. FIRST SHORTWAVE IS MOVING INTO MT ATTM WITH MOST OF THIS ENERGY STAYING TO THE NORTH. ISENTROPIC UPGLIDE WILL INCREASE ACROSS THE WEST LATE TONIGHT AND CONTINUE THROUGH SUNDAY AND EVEN SUNDAY NIGHT. AT LEAST TWO EMBEDDED SHORTWAVES WILL MOVE THROUGH THE FLOW AS STRONG 150KT+ JET COMES ONSHORE AND SAGS SWD SUNDAY INTO SUNDAY NIGHT. THE WARM ADVECTION PATTERN WILL MAKE FOR A CHALLENGING FORECAST FOR THE JACKSON AND STAR VALLEYS AS INITIAL SNOW SUNDAY MORNING WILL LIKELY MIX WITH OR CHANGE TO RAIN IN THE LOWER PORTIONS OF THE VALLEYS SUNDAY AFTERNOON THROUGH SUNDAY NIGHT AS GRADUAL H7-H8 WARMING OCCURS. H7 TEMPS START NEAR -6C BUT WARM TO BETWEEN -2C AND -3C SUNDAY EVENING. THE HIGHER PARTS OF THE VALLEYS MAY STAY SNOW PRODUCING SOME SIGNIFICANT SNOWFALL WHILE OTHER AREAS SEE ONLY AN INCH OR TWO BETWEEN SUNDAY AND MONDAY. THE MOUNTAINS WILL LIKELY SEE SIGNIFICANT FALL...MAINLY FOR THE TETONS AND GROS VENTRES SOUTH TO THE WYOMING AND SALT RANGES. A WINTER STORM WATCH HAS BEEN POSTED FOR THESE AREAS FROM 3AM SUNDAY THROUGH 5 PM MONDAY. ADDITIONAL LIGHT SNOW WILL FALL TONIGHT AND LIKELY CONTINUE MONDAY NIGHT AND TUESDAY. THE RIGHT FRONT QUAD OF THE JET MAY AID IN HIGH WIND POTENTIAL FOR THE EAST SLOPE OF THE ABSAROKAS AND CODY FOOTHILLS ON SUNDAY. LCL WRF HAS A STRONG GAP FLOW SIGNATURE WITH SOME POTENTIAL FOR A MTN WAVE EVENT WITH STABLE MTN TOP LAYER AND SOME LEE BENDING OF THE ISENTROPES. VARIOUS FROUDE CALCULATIONS ALSO SHOW SOME POTENTIAL WITH THE NUMBER BEING NEAR 1 AT TIMES. THE WIND CORRIDOR ALSO LOOKS VERY WINDY BUT NW MID LEVEL FLOW IS NOT OPTIMAL SUNDAY INTO SUNDAY NIGHT. WORTH WATCHING YET BUT STICKING WITH GENERAL 20 TO 30KT SUSTAINED WINDS WITH GUSTS OF 40 TO 50 MPH. THE GREENS AND RATTLESNAKES WILL BE THE ONE TO WATCH VERY CLOSELY. THAT FIRST WAVE THAT GETS THE SNOW CRANKING IN THE WEST SUNDAY MORNING THEN PUSHES EAST OF THE DIVIDE LIKELY CREATING A SWATH OF RAIN AND SNOW ACROSS OUR NERN ZONES LATE SUNDAY MORNING INTO THE AFTERNOON. THE JET THEN SAGS SWD OVER THE WATCH AREA FOR INCREASING WINDS AND CONTINUED SNOWFALL ALONG WITH A SLOWLY DESTABILIZING AIRMASS INTO MONDAY MORNING. SECOND SHORTWAVE WILL ALSO BRING AN INCREASED CHANCE OF PCPN EAST OF THE DIVIDE ON MONDAY ALONG WITH A LOT OF WIND. WIND RIVER BASIN WILL BE ONE AREAS TO WATCH MONDAY WITH INCREASING W TO E PRESSURE GRADIENT...STRONG WINDS ALOFT AND CAA. SOME THREAT ON SUNDAY OR SUNDAY NIGHT WITH NW-SE JET CORE ALOFT BUT EVEN THE LCL WRF IS KEEPING LGT AND VARIABLE WINDS OVER THE AREA. STILL WORTH KEEPING AN EYE ON AS WE HAD 30KT WINDS TODAY. GFS HAS VERY WARM TEMPS ON MONDAY AND FORECAST GENERALLY LEANED ON COOLER BUT STILL MILD MET GUIDANCE. HARD TO SEE NEARLY 60 IN LANDER ON MONDAY WITH FORECAST H5 TEMPS OF -5 COMBINED WITH CLOUD COVER AND STRONG WINDS. SOME LIGHT SNOW WILL CONTINUE OUT WEST THROUGH TUESDAY AND IN THE NRN MTNS. LONG TERM...TUESDAY NIGHT THROUGH SATURDAY NORTHWEST FLOW PERSISTS OVER AREA THROUGH THIS PERIOD. SNOW LIKELY IN THE WESTERN MOUNTAINS AND FAR WEST VALLEYS AHEAD OF A COLD FRONT ON TUESDAY. THIS MODIFIED ARCTIC FRONT WILL PUSH SOUTH ACROSS CENTRAL WYOMING TUESDAY NIGHT/WEDNESDAY MORNING USHERING IN CHANCES OF SNOW AND MUCH COLDER TEMPERATURES. MOSTLY DRY AND COOL CONDITIONS EXPECTED TO FOLLOW ON THURSDAY. A RETURN TO NEAR NORMAL TEMPERATURES WITH CHANCES OF SNOW RETURNING TO THE WEST...AND LESSER SO ACROSS THE NORTH...EXPECTED FRIDAY AND SATURDAY. LATEST ECMWF HAS FINALLY NIXED THE CLOSING OFF A SW LOW ON BACKSIDE OF LONGWAVE TROUGH OVER CENTRAL NORTH AMERICA. THE ECMWF...AND TO A LESSER EXTENT THE GEM...SHOW A CROSS POLAR FLOW POURING INTO BACKSIDE OF THIS TROUGH TUESDAY AND WEDNESDAY...WITH THE ECMWF BRINGING -40C H5 COLD POOL INTO THE NORTHERN PLAINS ON WEDNESDAY. THE GFS WAS MORE PROGRESSIVE AND FLATTER WITH THE FLOW OVER NORTH AMERICA AND EASTERN PACIFIC. THE ECMWF SOLUTION IS PREFERRED FOR THIS FORECAST PERIOD. NW DIFLUENT FLOW INTO WEST PRECEDES STRONG SHORTWAVE THAT WILL DIG ACROSS NORTHERN GREAT BASIN ACROSS CENTRAL ROCKIES TUESDAY NIGHT AND WEDNESDAY. THUS...THE BEST POTENTIAL FOR SIGNIFICANT SNOWFALL IN THE WEST DURING THIS PERIOD WILL BE ON TUESDAY. DIGGING UPPER TROUGH WILL PULL ARCTIC FRONT OVER NORTHERN PLAINS BACK AGAINST THE DIVIDE...SPREADING CHANCES OF LIGHT SNOW ACROSS CENTRAL WYOMING TUESDAY NIGHT THROUGH WEDNESDAY WITH THESE CHANCES SHIFTED EAST...MAINLY DOWN THE INTERSTATE 25 CORRIDOR WEDNESDAY NIGHT. ECMWF SLOWER TO MOVE COLDER AIRMASS OUT OF AREA LATE IN THE WEEK...KEEPING MORE AMPLIFIED NW FLOW OVER AREA WITH A COUPLE OF CLIPPERS IN THE FLOW FRIDAY AND SATURDAY. MAIN CHANGES TO THE ONGOING TEST BED...TEMPERATURES WERE ADJUSTED DOWNWARD FROM BCCONSALL GUIDANCE...ESPECIALLY ON WEDNESDAY AND THURSDAY...AND CONSALL POPS WERE ADJUSTED UPWARD TO CHANCE CATEGORY BEHIND ARCTIC FRONT TUESDAY NIGHT THROUGH WEDNESDAY NIGHT ACROSS CENTRAL AREAS. AVIATION... A STRONG NORTHWEST FLOW WILL USHER IN AMPLE PACIFIC MOISTURE INTO WYOMING FOR THE NEXT COUPLE OF DAYS. SEVERAL WEATHER DISTURBANCES WITHIN THE FLOW WILL DUMP HEAVY SNOW AMOUNTS OVER FAR WESTERN WYOMING WITH ONE SUCH FEATURE DELIVERING INCREASING SNOWFALL TO FAR WESTERN WYOMING LATE TONIGHT AND INTO SUNDAY AND WILL BE AIDED BY A STRONG AREA OF WINDS WITHIN THE JET STREAM ALOFT. THIS WILL RESULT IN GRADUALLY LOWERING CIGS AND VSBY FOR KJAC AFTER 00Z THIS EVENING WITH WIDESPREAD IFR CONDITIONS AND MTN OBSCURATIONS EXPECTED BEFORE DAWN. THE SNOW MAY MIX WITH OR CHANGE TO RAIN BY LATE SUNDAY AFTERNOON...ESPECIALLY BELOW 6000 FEET IN THE WESTERN VALLEYS WHERE MVFR CONDITIONS WILL BECOME MORE PREVALENT. KPNA...AND TO A LESSER EXTENT...KBPI WILL EXPERIENCE MVFR CONDITIONS BY 09Z ALONG WITH MTNS OBSCURATIONS THAT WILL CONTINUE THROUGH SUNDAY. EAST OF THE CONTINENTAL DIVIDE DRIER AND WINDY CONDITIONS ARE EXPECTED. VERY STRONG WEST WINDS OF 60 MPH WITH GUSTS IN EXCESS OF 80 MPH ARE POSSIBLE ACROSS THE EAST SLOPE OF THE ABSAROKA MOUNTAINS AND SOME OF THE CODY FOOTHILLS AFTER 09Z TONIGHT THROUGH SUNDAY. 25 TO 35 MPH WINDS ARE EXPECTED AT KCOD. OTHERWISE WEST SOUTHWEST WINDS OF 45 TO 55 MPH WINDS WITH GUSTS TO 65 MPH ARE EXPECTED ACROSS THE EAST SLOPE OF THE WIND RIVER MOUNTAINS DURING THIS TIME FRAME. WEST SOUTHWEST WINDS OF 35 TO 45 MPH WITH GUSTS TO 55 MPH ARE EXPECTED ACROSS THE EAST SLOPE OF THE BIG HORN MOUNTAINS AND 30 TO 40 MPH WINDS WITH GUSTS TO 50 MPH FROM KRKS TO KCPR. AS THIS WEATHER FEATURE CROSSES THE DIVIDE...SCATTERED RAIN AND SNOW SHOWERS WILL SPREAD EAST INTO SWEETWATER COUNTY INCLUDING KRKS BY 12Z SUNDAY. SCATTERED RAIN AND SNOW SHOWERS WILL SPREAD TO OTHER AREAS EAST OF THE DIVIDE BY 18Z SUNDAY WITH RAIN AND SNOW LIKELY IN THE BIG HORN MOUNTAINS WHICH WILL LEAD TO LOCAL MVFR CONDITIONS AND MOUNTAIN OBSCURATIONS ALONG WITH SOME IFR CONDITIONS...ESPECIALLY IN THE BIG HORN MOUNTAINS. FIRE WEATHER... SNOW WILL BECOME WIDESPREAD ACROSS THE WEST OVERNIGHT INTO SUNDAY MORNING WITH SNOW CONTINUING THROUGH AT LEAST MONDAY. HOWEVER...ENOUGH WARM AIR WILL LIKELY WORK INTO THE WESTERN VALLEYS TO CREATE A RAIN...SNOW MIX OR EVEN A PERIOD OF RAIN IN THE LOWER VALLEYS SUNDAY AFTERNOON THROUGH SUNDAY NIGHT. WINDS WILL INCREASE ONCE AGAIN ACROSS THE WIND CORRIDOR FROM THE RED DESERT TO CASPER SUNDAY AND SUNDAY NIGHT AND ALSO ALONG THE EAST SLOPE OF THE ABSAROKAS AND CODY FOOTHILLS. EVEN THE EAST SLOPE OF THE WIND RIVER AND BIGHORNS WILL BE WINDY AT TIMES. AS A STRONG JET MOVES OVERHEAD...MOST MOUNTAIN AREAS WILL BE WINDY SUNDAY NIGHT INTO MONDAY. IT WILL ALSO BECOME WINDY IN THE WIND RIVER BASIN ON MONDAY. && .RIW WATCHES/WARNINGS/ADVISORIES... HIGH WIND WATCH FROM LATE TONIGHT THROUGH SUNDAY EVENING WYZ002-003. WINTER STORM WATCH FROM LATE TONIGHT THROUGH MONDAY AFTERNOON WYZ012-024. && SHORT TERM...SKRBAC LONG TERM...AEM AVIATION...LIPSON FIRE WEATHER...SKRBAC
Hazardous weather outlook, Jan 15, 2:35 PM MST, 12 hours 6 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 235 PM MST SAT JAN 15 2011 WYZ001>020-022>030-161200- 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- 203 PM MST SAT JAN 15 2011 ...WINTER STORM WATCH LATE TONIGHT THROUGH MONDAY FOR THE FAR WESTERN WYOMING MOUNTAINS... ...HIGH WIND WATCH LATE TONIGHT THROUGH EARLY SUNDAY EVENING FOR THE CODY FOOTHILLS AND THE EAST SLOPE OF THE ABSAROKA MOUNTAINS... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING. .DAY ONE...TONIGHT MOIST NORTHWEST FLOW ALOFT IS FORECAST TO CONTINUE THROUGH TONIGHT WEST OF THE CONTINENTAL DIVIDE. THIS WILL CONTINUE TO BRING PERIODS OF SNOW TO THE WESTERN MOUNTAINS AND FAR WEST VALLEYS TONIGHT. THE POTENTIAL FOR A MAJOR WINTER STORM IS GROWING ACROSS THE FAR WEST BEGINNING LATE TONIGHT. IN ADDITION...A HIGH WIND WILL BE POSSIBLE ACROSS THE EAST SLOPES OF THE ABSAROKA MOUNTAINS AND THE CODY FOOTHILLS BEGINNING LATE TONIGHT. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY MOIST NORTHWEST FLOW ALOFT IS FORECAST TO CONTINUE THROUGH NEXT TUESDAY OVER THE REGION. THIS WILL CONTINUE BRING PERIODS OF SNOW TO THE WESTERN MOUNTAINS AND FAR WEST VALLEYS. THE POTENTIAL FOR A MAJOR WINTER STORM IS GROWING ACROSS THE FAR WEST SUNDAY THROUGH MONDAY. SNOWFALL IN EXCESS OF A FOOT IS POSSIBLE IN THE MOUNTAINS. SNOW AND RAIN IS POSSIBLE IN THE VALLEYS. THE MIXED PRECIPITATION COULD MAKE TRAVEL HAZARDOUS. IN ADDITION...HIGH WIND WILL BE POSSIBLE ACROSS THE EAST SLOPES OF THE ABSAROKA MOUNTAINS...CODY FOOTHILLS AND THE SOUTH CENTRAL WIND CORRIDORS ON SUNDAY INTO SUNDAY NIGHT. AN ARCTIC COLD FRONT WILL PUSH SOUTH ACROSS CENTRAL WYOMING TUESDAY NIGHT AND WEDNESDAY...USHERING IN MUCH COLDER TEMPERATURES AND CHANCES OF SNOW. EXPECT THE POTENTIAL FOR HAZARDOUS WINTER DRIVING CONDITIONS AND BITTER COLD WIND CHILLS OVER PORTIONS OF CENTRAL WYOMING TUESDAY NIGHT INTO THURSDAY MORNING. .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 |
|---|---|---|---|---|
| Jan 16, 2:41 AM MST | Winter Weather Advisory | RIW | Lincoln, Park, Sublette, Teton | 31 hr |
| Jan 16, 2:47 AM MST | High Wind Warning | RIW | Fremont, Hot Springs, Park | 17 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.