Alert archive / Wyoming / Winter Storm Warnings in 2011
Winter Storm Warning 3, NWS Riverton, WY
NWS Riverton, WY issued this winter storm warning at Jan 18, 2011, 10:48 PM MST for Lincoln County, Teton County, Wyoming. It was in force for 10 hr. 23 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jan 18, 2011, 10:48 PM MST (05:48 UTC)
- Expired
- Jan 19, 2011, 8:38 AM MST
- In force
- 10 hr
- Issued by
- NWS Riverton, WY
Counties Lincoln County, WY, Teton County, WY
The radar
The Pocatello radar (KSFX), 167 km from the middle of the area, began a volume at 05:49 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 19, 5:32 AM MST | HEAVY SNOW 10 | 1 Se Thayne, WY | |
| Jan 19, 5:32 AM MST | HEAVY SNOW 13 | Wilson, WY | |
| Jan 19, 5:33 AM MST | HEAVY SNOW 6 | 8 Nne Moran Junction, WY | BASE CAMP SNOTEL |
| Jan 19, 5:34 AM MST | SNOW 5 | 20 Ne Bondurant, WY | GROS VENTRE SUMMIT SNOTEL |
| Jan 19, 5:34 AM MST | HEAVY SNOW 6 | 6 Ene Alta, WY | GRAND TARGHEE SNOTEL |
| Jan 19, 5:34 AM MST | HEAVY SNOW 7 | 8 W South Entrance, WY | GRASSY LAKE SNOTEL |
| Jan 19, 5:34 AM MST | HEAVY SNOW 8 | 10 N Bondurant, WY | GRANITE CREEK SNOTEL |
| Jan 19, 5:35 AM MST | SNOW 4 | South Entrance, WY | SNAKE RIVER STN SNOTEL |
| Jan 19, 5:35 AM MST | SNOW 5 | 26 N Kemmerer, WY | HAMS FORK SNOTEL |
| Jan 19, 5:35 AM MST | HEAVY SNOW 6 | 26 Nw Dubois, WY | TOGWOTEE PASS |
| Jan 19, 5:35 AM MST | HEAVY SNOW 11 | 8 Wnw Jackson, WY | PHILLIPS BENCH SNOTEL |
| Jan 19, 5:35 AM MST | HEAVY SNOW 12 | 8 Se Afton, WY | COTTONWOOD CREEK SNOTEL |
| Jan 19, 5:36 AM MST | HEAVY SNOW 6 | 15 Nne Cokeville, WY | KELLEY RANGER STATION SNOTEL |
| Jan 19, 5:36 AM MST | HEAVY SNOW 7 | 15 S Afton, WY | SALT RIVER SUMMIT SNOTEL |
| Jan 19, 5:36 AM MST | HEAVY SNOW 7 | 19 Se Afton, WY | SPRING CREEK DIVIDE SNOTEL |
| Jan 19, 5:36 AM MST | HEAVY SNOW 8 | 36 N Kemmerer, WY | INDIAN CREEK SNOTEL |
| Jan 19, 5:37 AM MST | HEAVY SNOW 11 | 8 Ne Afton, WY | WILLOW CREEK SNOTEL |
| Jan 19, 5:38 AM MST | HEAVY SNOW 12 | 9.9 Nnw Jackson, WY | JACKSON HOLE-RAYMER |
| Jan 19, 5:39 AM MST | HEAVY SNOW 8 | 1 S Jackson, WY | SNOW KING SKI AREA |
| Jan 19, 5:39 AM MST | HEAVY SNOW 11 | 19 Sw Bondurant, WY | BLIND BULL SUMMIT SNOTEL |
| Jan 19, 5:39 AM MST | HEAVY SNOW 14 | 17.2 E Thayne, WY | BLIND BULL SUMMIT |
| Jan 19, 5:40 AM MST | HEAVY SNOW 8 | 14.3 E Thayne, WY | BOX Y RANCH |
| Jan 19, 5:40 AM MST | HEAVY SNOW 8 | 8.6 Nnw Jackson, WY | JACKSON HOLE-BASE |
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, 5.8 hours before the alert went out and 181 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
- 2980 m above ground
- 0-6 km bulk shear
- 81 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 189 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
575 WWUS45 KRIW 190548 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 1048 PM MST TUE JAN 18 2011 ...STORM SYSTEM TO IMPACT THE WEST THROUGH WEDNESDAY MORNING... .A STORM SYSTEM WILL MOVE SOUTHEAST INTO SOUTHWEST WYOMING BY MORNING. SNOW WILL OCCUR...MODERATE TO HEAVY AT TIMES THROUGH 5 AM ...THEN TAPERING OFF TO LIGHT SNOW. WYZ013-191400- /O.UPG.KRIW.WW.Y.0003.000000T0000Z-110119T1800Z/ /O.NEW.KRIW.WS.W.0003.110119T0548Z-110119T1800Z/ JACKSON HOLE- INCLUDING THE CITY OF...JACKSON 1048 PM MST TUE JAN 18 2011 ...WINTER STORM WARNING IN EFFECT UNTIL 11 AM MST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW WHICH IS IN EFFECT UNTIL 11 AM MST WEDNESDAY. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. * SUMMARY AND TIMING...SNOW WILL OCCUR OVERNIGHT. THE HEAVIEST PERIOD OF SNOWFALL WILL OCCUR THROUGH 4 AM...THEN TAPER OFF TO LIGHT SNOW THROUGH WEDNESDAY MORNING. SNOWFALL RATES OF 1 INCH PER HOUR IS LIKELY IN HEAVY SNOW. * SNOW ACCUMULATIONS...4 TO 5 INCHES HAS FALLEN IN THE VALLEY AS OF 10 PM. TOTAL SNOWFALL OF 6 TO 8 INCHES WILL OCCUR WITH LOCALLY HIGHER AMOUNTS POSSIBLE. * WIND AND VISIBILITY...A SOUTH WIND OF 10 TO 20 MPH WILL COMBINE WITH SNOWFALL TO REDUCE THE VISIBILITY TO ONE HALF MILE AT TIMES IN THE OPEN AREAS NORTH OF THE TOWN JACKSON. * IMPACTS...AREA ROADS WILL LIKELY BECOME SLICK WITH SNOWFALL. 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. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ WYZ023-191400- /O.UPG.KRIW.WW.Y.0003.000000T0000Z-110119T1800Z/ /O.NEW.KRIW.WS.W.0003.110119T0548Z-110119T1800Z/ STAR VALLEY- INCLUDING THE CITIES OF...AFTON...ALPINE...THAYNE 1048 PM MST TUE JAN 18 2011 ...WINTER STORM WARNING IN EFFECT UNTIL 11 AM MST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW WHICH IS IN EFFECT UNTIL 11 AM MST WEDNESDAY. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. * SUMMARY AND TIMING...SNOW WILL OCCUR...MODERATE TO HEAVY AT TIMES THROUGH 5 AM. THEN LIGHT SNOW WILL OCCUR THE REST OF WEDNESDAY MORNING. SNOWFALL RATES OF 1 INCH PER HOUR WILL OCCUR IN HEAVY SNOW. * SNOW ACCUMULATIONS...SNOWFALL OF 3 TO 5 INCHES HAS OCCURRED IN THE STAR VALLEY AS OF 10 PM. TOTAL SNOWFALL OF 6 TO 9 INCHES WILL OCCUR WITH LOCALLY HIGHER AMOUNTS POSSIBLE. * WIND AND VISIBILITY...AREAS OF SOUTH WIND AT 10 TO 20 MPH COMBINED WITH SNOWFALL WILL REDUCE THE VISIBILITY TO ONE HALF MILE AT TIMES. * IMPACTS...AREA ROADS WILL BECOME SLICK WITH SNOWFALL. DRIFTING SNOW WILL ALSO IMPACT ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ WYZ012-191400- /O.CON.KRIW.WW.Y.0003.000000T0000Z-110119T1800Z/ TETON AND GROS VENTRE MOUNTAINS- 1048 PM MST TUE JAN 18 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST WEDNESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST WEDNESDAY. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL OCCUR IN THIS AREA THROUGH 5 AM...THEN DECREASE TO LIGHT SNOW THROUGH WEDNESDAY MORNING. SNOWFALL RATES OF AN INCH OR MORE PER HOUR IS LIKELY IN HEAVY SNOW. * SNOW ACCUMULATIONS...SNOWFALL OF 4 TO 7 INCHES HAS OCCURRED ABOVE 8500 FEET IN THE TETONS AS OF 10 PM. TOTAL SNOWFALL OF 6 TO 12 INCHES WILL OCCUR. * WIND AND VISIBILITY...A WEST WIND OF 25 TO 35 MPH WITH GUSTS TO 45 MPH WILL OCCUR WITH BLOWING SNOW AND VERY LOW VISIBILITY. * IMPACTS...TRAVEL OVER TETON AND TOGWOTEE PASS WILL BE IMPACTED BY SNOW COVERED ROADS AND REDUCED VISIBILITY. 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. && $$ WYZ024-191400- /O.CON.KRIW.WW.Y.0003.000000T0000Z-110119T1800Z/ SALT RIVER AND WYOMING RANGES- 1048 PM MST TUE JAN 18 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST WEDNESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST WEDNESDAY. * SUMMARY AND TIMING...SNOW WILL OCCUR...MODERATE TO HEAVY AT TIMES THROUGH 6 AM...THEN TAPER OFF TO LIGHT SNOW FOR WEDNESDAY MORNING. SNOWFALL RATES OF AN INCH OR MORE PER HOUR WILL OCCUR IN HEAVY SNOW. * SNOW ACCUMULATIONS...SNOWFALL OF 1 TO 4 INCHES HAS OCCURRED AS OF 10 PM. STORM TOTAL SNOWFALL WILL RANGE FROM 6 TO 12 INCHES. * WIND AND VISIBILITY...A WEST WIND OF 25 TO 35 MPH WILL OCCUR OVER THE SUMMITS WITH BLOWING SNOW AND VERY LOW VISIBILITY * IMPACTS...ANYONE WITH TRAVEL PLANS IN THE SALT OR WYOMING RANGES SHOULD BE PREPARED FOR SNOW...GUSTY WIND AND FALLING TEMPERATURES. AREA ROADS WILL BE SLICK AND SNOW PACKED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ025-191400- /O.CON.KRIW.WW.Y.0003.000000T0000Z-110119T1800Z/ UPPER GREEN RIVER BASIN FOOTHILLS- INCLUDING THE CITY OF...PINEDALE 1048 PM MST TUE JAN 18 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST WEDNESDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST WEDNESDAY. * SUMMARY AND TIMING...SNOW WILL OCCUR OVERNIGHT INTO WEDNESDAY MORNING. THE HEAVIEST PERIOD OF SNOWFALL WILL OCCUR FROM MIDNIGHT UNTIL 6 AM. THEN LIGHT SNOW WILL OCCUR THE REST OF WEDNESDAY MORNING. * SNOW ACCUMULATIONS...2 INCHES AROUND PINEDALE WITH 3 TO 5 INCHES FROM CORA TO BONDURANT. * VISIBILITY...UNDER ONE MILE AT TIMES. * IMPACTS...HIGHWAY 189 AND 191 WILL BECOME SLICK AND SNOW PACKED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
3 follow-up statements
798 WWUS45 KRIW 190953 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 253 AM MST WED JAN 19 2011 ...STORM SYSTEM TO IMPACT THE WEST THROUGH EARLY AFTERNOON... .A STORM SYSTEM WILL MOVE SOUTHEAST INTO SOUTHWEST WYOMING THIS MORNING. SNOW WILL OCCUR...MODERATE TO HEAVY AT TIMES THROUGH 5 AM ...THEN TAPERING OFF TO LIGHT SNOW IN THE WEST. EAST OF THE DIVIDE...A PERIOD OF MODERATE TO HEAVY SNOW WILL OCCUR DURING THE MORNING HOURS ALONG THE LANDER FOOTHILLS. WYZ013-191800- /O.CON.KRIW.WS.W.0003.000000T0000Z-110119T1800Z/ JACKSON HOLE- INCLUDING THE CITY OF...JACKSON 253 AM MST WED JAN 19 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * SUMMARY AND TIMING...SNOW WILL CONTINUE THIS MORNING. THE HEAVIEST PERIOD OF SNOWFALL WILL OCCUR THROUGH 5 AM...THEN TAPER OFF TO LIGHT SNOW THROUGH LATE MORNING. SNOWFALL RATES OF 1 INCH PER HOUR ARE LIKELY IN HEAVY SNOW. * SNOW ACCUMULATIONS...5 TO 6 INCHES HAS FALLEN IN THE VALLEY. TOTAL SNOWFALL OF 6 TO 8 INCHES WILL OCCUR WITH LOCALLY HIGHER AMOUNTS POSSIBLE. * WIND AND VISIBILITY...A SOUTH WIND OF 10 TO 20 MPH WILL COMBINE WITH SNOWFALL TO REDUCE THE VISIBILITY TO ONE HALF MILE AT TIMES IN THE OPEN AREAS NORTH OF THE TOWN JACKSON. * IMPACTS...AREA ROADS WILL BECOME SNOW PACKED AND SLICK. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ WYZ023-191800- /O.CON.KRIW.WS.W.0003.000000T0000Z-110119T1800Z/ STAR VALLEY- INCLUDING THE CITIES OF...AFTON...ALPINE...THAYNE 253 AM MST WED JAN 19 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * SUMMARY AND TIMING...SNOW WILL OCCUR...MODERATE TO HEAVY AT TIMES THROUGH 7 AM. THEN LIGHT SNOW WILL OCCUR THE REST OF THE MORNING. SNOWFALL RATES OF 1 INCH PER HOUR WILL OCCUR IN HEAVY SNOW. * SNOW ACCUMULATIONS...4 TO 6 INCHES HAS FALLEN IN THE STAR VALLEY. TOTAL SNOWFALL OF 6 TO 9 INCHES WILL OCCUR WITH LOCALLY HIGHER AMOUNTS POSSIBLE. * WIND AND VISIBILITY...AREAS OF SOUTH WIND AT 10 TO 20 MPH COMBINED WITH SNOWFALL WILL REDUCE THE VISIBILITY TO ONE HALF MILE AT TIMES. * IMPACTS...AREA ROADS WILL BECOME SLICK WITH SNOWFALL. DRIFTING SNOW WILL ALSO IMPACT ROADWAYS. 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. && $$ WYZ018-191815- /O.EXB.KRIW.WW.Y.0003.110119T1000Z-110119T2100Z/ LANDER FOOTHILLS- INCLUDING THE CITY OF...LANDER 253 AM MST WED JAN 19 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 2 PM MST THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOWFALL...WHICH IS IN EFFECT UNTIL 2 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...SNOW WILL DEVELOP EARLY THIS MORNING AND CONTINUE...MODERATE TO HEAVY AT TIMES...THROUGH EARLY AFTERNOON. * SNOW ACCUMULATIONS...SNOWFALL OF 2 TO 4 INCHES IN EXPECTED IN THE LANDER AREA. * WIND AND VISIBILITY...NORTHERLY WIND OF UP TO 10 MPH IS EXPECTED WITH VISIBILITY REDUCED TO UNDER ONE MILE AT TIMES DURING HEAVIER SNOW. * IMPACTS...HAZARDOUS TRAVEL CAN BE EXPECTED AT TIMES ALONG HIGHWAY 287 AND 789 IN AND AROUND LANDER AS VISIBILITY IS REDUCED AND ROADS BECOME SNOW PACKED AND SLICK. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ012-191800- /O.CON.KRIW.WW.Y.0003.000000T0000Z-110119T1800Z/ TETON AND GROS VENTRE MOUNTAINS- 253 AM MST WED JAN 19 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * SUMMARY AND TIMING...MODERATE TO HEAVY SNOW WILL OCCUR IN THIS AREA THROUGH 5 AM...THEN DECREASE TO LIGHT SNOW THROUGH THE REST OF THE MORNING. SNOWFALL RATES OF AN INCH OR MORE PER HOUR ARE LIKELY IN HEAVY SNOW. * SNOW ACCUMULATIONS...SNOWFALL OF 8 TO 12 INCHES HAS OCCURRED ABOVE 8500 FEET IN THE TETONS. TOTAL SNOWFALL OF 10 TO 15 INCHES WILL OCCUR. * WIND AND VISIBILITY...A WEST WIND OF 20 TO 30 MPH WITH GUSTS TO 40 MPH WILL OCCUR WITH BLOWING SNOW AND VERY LOW VISIBILITY. * IMPACTS...TRAVEL OVER TETON AND TOGWOTEE PASS WILL BE IMPACTED BY SNOW COVERED ROADS AND REDUCED VISIBILITY. 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. && $$ WYZ024-191800- /O.CON.KRIW.WW.Y.0003.000000T0000Z-110119T1800Z/ SALT RIVER AND WYOMING RANGES- 253 AM MST WED JAN 19 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * SUMMARY AND TIMING...SNOW WILL OCCUR...MODERATE TO HEAVY AT TIMES THROUGH 7 AM...THEN TAPER OFF TO LIGHT SNOW THROUGH THE MORNING. SNOWFALL RATES OF AN INCH OR MORE PER HOUR WILL OCCUR IN HEAVY SNOW. * SNOW ACCUMULATIONS...SNOWFALL OF 4 TO 7 INCHES HAS FALLEN THROUGH 2 AM. STORM TOTAL SNOWFALL WILL RANGE FROM 6 TO 12 INCHES. * WIND AND VISIBILITY...A WEST WIND OF 25 TO 35 MPH WILL OCCUR OVER THE SUMMITS WITH BLOWING SNOW AND VERY LOW VISIBILITY * IMPACTS...ANYONE WITH TRAVEL PLANS IN THE SALT OR WYOMING RANGES SHOULD BE PREPARED FOR SNOW...GUSTY WIND AND FALLING TEMPERATURES. AREA ROADS WILL BE SLICK AND SNOW PACKED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ025-191800- /O.CON.KRIW.WW.Y.0003.000000T0000Z-110119T1800Z/ UPPER GREEN RIVER BASIN FOOTHILLS- INCLUDING THE CITY OF...PINEDALE 253 AM MST WED JAN 19 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * SUMMARY AND TIMING...SNOW WILL OCCUR THROUGH THE MORNING. THE HEAVIEST PERIOD OF SNOWFALL WILL OCCUR FROM THROUGH 7 AM. THEN LIGHT SNOW WILL OCCUR THE REST OF THE MORNING. * SNOW ACCUMULATIONS...2 INCHES AROUND PINEDALE WITH 3 TO 5 INCHES FROM CORA TO BONDURANT. * VISIBILITY...UNDER ONE MILE AT TIMES. * IMPACTS...HIGHWAY 189 AND 191 WILL BECOME SLICK AND SNOW PACKED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
962 WWUS45 KRIW 191213 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 513 AM MST WED JAN 19 2011 ...WINTER STORM TO IMPACT PARTS OF THE AREA THROUGH EARLY AFTERNOON... .A STORM SYSTEM WILL CONTINUE PUSH SOUTHEAST ACROSS SOUTHWEST WYOMING THIS MORNING. LIGHT SNOW WILL CONTINUE ACROSS MUCH OF WESTERN WYOMING THIS MORNING...BEFORE TAPERING OFF BY LATE MORNING. A PERIOD OF LIGHT TO MODERATE SNOW IS EXPECTED ACROSS CENTRAL WYOMING AS A COLD FRONT PUSHES SOUTH ACROSS THE AREA. THE HEAVIEST SNOWFALL IS EXPECTED ACROSS THE LANDER FOOTHILLS WHERE 2 TO 4 INCHES IS EXPECTED...WHILE THE REST OF THE LOWER ELEVATIONS ACROSS CENTRAL WYOMING COULD SEE 1 TO 3 INCHES OF SNOWFALL WITH THIS SYSTEM. MOST OF THE SNOWFALL WILL OCCUR BY LATE MORNING. WYZ013-191800- /O.CON.KRIW.WS.W.0003.000000T0000Z-110119T1800Z/ JACKSON HOLE- INCLUDING THE CITY OF...JACKSON 513 AM MST WED JAN 19 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * SUMMARY AND TIMING...LIGHT SNOW WILL CONTINUE THIS MORNING. * SNOW ACCUMULATIONS...4 TO 8 INCHES HAS FALLEN ACROSS JACKSON HOLE...WITH ISOLATED LOCATIONS REPORTING NEAR A FOOT OF SNOW. AN ADDITIONAL ONE TO TWO INCHES ARE POSSIBLE. * VISIBILITY...UNDER A MILE AT TIMES. * IMPACTS...AREA ROADS WILL BE SNOWPACKED AND SLICK. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ WYZ023-191800- /O.CON.KRIW.WS.W.0003.000000T0000Z-110119T1800Z/ STAR VALLEY- INCLUDING THE CITIES OF...AFTON...ALPINE...THAYNE 513 AM MST WED JAN 19 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * SUMMARY AND TIMING...LIGHT SNOW WILL CONTINUE THIS MORNING. * SNOW ACCUMULATIONS...4 TO 8 INCHES HAS FALLEN ACROSS STAR VALLEY...WITH AREAS AROUND THAYNE REPORTING 10 INCHES SO FAR. AN ADDITIONAL ONE TO TWO INCHES ARE POSSIBLE. * WIND AND VISIBILITY...UNDER A MILE AT TIMES. * IMPACTS...AREA ROADS WILL BE SLICK AND SNOWPACKED. 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. && $$ WYZ012-191800- /O.CON.KRIW.WW.Y.0003.000000T0000Z-110119T1800Z/ TETON AND GROS VENTRE MOUNTAINS- 513 AM MST WED JAN 19 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * SUMMARY AND TIMING...LIGHT TO MODERATE SNOW WILL CONTINUE THIS MORNING. * SNOW ACCUMULATIONS...6 TO 12 INCHES HAS OCCURRED ACROSS THE TETON AND GROS VENTRE MOUNTAINS OVERNIGHT. THE HEAVIEST SNOWFALL AMOUNTS OCCURRED OVER THE SOUTHERN TETONS...WHERE OVER A FOOT OF SNOW FELL. AN ADDITIONAL INCH OR TWO OF SNOW IS EXPECTED. * VISIBILITY...UNDER A MILE AT TIMES. * IMPACTS...TRAVEL OVER TETON AND TOGWOTEE PASSES WILL BE IMPACTED BY SNOW COVERED ROADS AND REDUCED VISIBILITY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ018-192100- /O.CON.KRIW.WW.Y.0003.000000T0000Z-110119T2100Z/ LANDER FOOTHILLS- INCLUDING THE CITY OF...LANDER 513 AM MST WED JAN 19 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...SNOW WILL DEVELOP BY 7 AM. A PERIOD OF MODERATE TO HEAVY SNOWFALL IS EXPECTED BETWEEN 7 AM AND 10 AM...WITH A STEADY LIGHT SNOW THROUGH EARLY AFTERNOON. * SNOW ACCUMULATIONS...SNOWFALL OF 2 TO 4 INCHES IN EXPECTED IN THE LANDER AREA. * VISIBILITY...UNDER A HALF A MILE AT TIMES. * IMPACTS...HAZARDOUS TRAVEL CAN BE EXPECTED AT TIMES ALONG HIGHWAY 287 AND 789 IN AND AROUND LANDER AS VISIBILITY IS REDUCED AND ROADS BECOME SNOWPACKED AND SLICK. 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. && $$ WYZ024-191800- /O.CON.KRIW.WW.Y.0003.000000T0000Z-110119T1800Z/ SALT RIVER AND WYOMING RANGES- 513 AM MST WED JAN 19 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * SUMMARY AND TIMING...LIGHT TO MODERATE SNOW WILL CONTINUE THIS MORNING. * SNOW ACCUMULATIONS...SNOWFALL OF 5 TO 8 INCHES HAS FALLEN SO FAR...WITH SNOWFALL TOTALS GENERALLY BETWEEN 6 AND 12 INCHES. * VISIBILITY...UNDER A MILE AT TIMES. * IMPACTS...AREA ROADS WILL BE SLICK AND SNOWPACKED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ WYZ025-191800- /O.CON.KRIW.WW.Y.0003.000000T0000Z-110119T1800Z/ UPPER GREEN RIVER BASIN FOOTHILLS- INCLUDING THE CITY OF...PINEDALE 513 AM MST WED JAN 19 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * SUMMARY AND TIMING...LIGHT SNOW WILL CONTINUE THIS MORNING. * SNOW ACCUMULATIONS...2 INCHES AROUND PINEDALE WITH 3 TO 5 INCHES FROM CORA TO BONDURANT. * VISIBILITY...UNDER ONE MILE AT TIMES. * IMPACTS...HIGHWAY 189 AND 191 WILL BE SLICK AND SNOWPACKED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ 21
966 WWUS45 KRIW 191538 WSWRIW URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE RIVERTON WY 838 AM MST WED JAN 19 2011 ...WINTER STORM TO IMPACT PARTS OF THE AREA THROUGH EARLY AFTERNOON... .A STORM SYSTEM WILL CONTINUE TO PUSH SOUTHEAST ACROSS SOUTHWEST WYOMING THIS MORNING. LIGHT SNOW WILL CONTINUE ACROSS CENTRAL WYOMING THROUGH EARLY AFTERNOON BEFORE TAPERING OFF. WYZ013-023-191645- /O.CAN.KRIW.WS.W.0003.000000T0000Z-110119T1800Z/ JACKSON HOLE-STAR VALLEY- INCLUDING THE CITIES OF...JACKSON...AFTON...ALPINE...THAYNE 838 AM MST WED JAN 19 2011 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE WINTER STORM WARNING. SNOWFALL HAS TAPERED OFF ACROSS THE AREA...THEREFORE THE WINTER STORM WARNING HAS BEEN CANCELED. ADDITIONAL SNOW SHOWERS ARE POSSIBLE THROUGH THE DAY. HOWEVER...LITTLE ADDITIONAL ACCUMULATION IS EXPECTED. $$ WYZ012-024-025-191645- /O.CAN.KRIW.WW.Y.0003.000000T0000Z-110119T1800Z/ TETON AND GROS VENTRE MOUNTAINS-SALT RIVER AND WYOMING RANGES- UPPER GREEN RIVER BASIN FOOTHILLS- INCLUDING THE CITY OF...PINEDALE 838 AM MST WED JAN 19 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE WINTER WEATHER ADVISORY. SNOWFALL HAS TAPERED OFF ACROSS THE AREA...THEREFORE THE WINTER WEATHER ADVISORY HAS BEEN CANCELED. ADDITIONAL SNOW SHOWERS ARE POSSIBLE THROUGH THE DAY. HOWEVER...LITTLE ADDITIONAL ACCUMULATION IS EXPECTED. $$ WYZ018-192100- /O.CON.KRIW.WW.Y.0003.000000T0000Z-110119T2100Z/ LANDER FOOTHILLS- INCLUDING THE CITY OF...LANDER 838 AM MST WED JAN 19 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST THIS AFTERNOON. * SUMMARY AND TIMING...OCCASIONAL LIGHT SNOW WILL CONTINUE THROUGH EARLY AFTERNOON BEFORE ENDING. * SNOW ACCUMULATIONS...SNOWFALL OF 2 TO 4 INCHES IN EXPECTED IN THE LANDER AREA. * VISIBILITY...UNDER A HALF A MILE AT TIMES. * IMPACTS...HAZARDOUS TRAVEL CAN BE EXPECTED AT TIMES ALONG HIGHWAY 287 AND 789 IN AND AROUND LANDER AS VISIBILITY IS REDUCED AND ROADS BECOME SNOWPACKED AND SLICK. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
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 18, 1:54 PM MST, 8 hours 54 minutes earlier.
Area forecast discussion, Jan 18, 1:54 PM MST, 8 hours 54 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RIVERTON WY 154 PM MST TUE JAN 18 2011 SHORT TERM...TONIGHT THROUGH FRIDAY NEXT SYSTEM IS MOVING THROUGH WA AND SWRN B.C. AND SHOULD START IMPACTING THE FAR WEST THIS EVENING. ISENTROPIC LIFT DEVELOPS INCREASES OVER THE NEXT FEW HOURS IN ADVANCE OF THE UPPER LEVEL SUPPORT. QG FORCING BEGINS TO INCREASE...LAPSE RATES STEEPEN AND POSSIBLE INTERACTION OF TWO JET STREAKS ADDS UP TO A PERIOD OF MODERATE TO LOCALLY HEAVY SNOW IN THE FAR WEST TONIGHT WITH LIGHTER SNOWS INTO WEDNESDAY MORNING. WILL ISSUE WINTER WX ADVISORIES FOR THE TETONS...JACKSON AND STAR VALLEYS...SALT/WYOMING RANGES AND THE BONDURANT TO PNA ZONE FOR TONIGHT THROUGH 18Z WED. AT THE SAME TIME...THE ARCTIC BOUNDARY IS SAGGING SWD INTO JOHNSON COUNTY THIS AFTERNOON WITH TEMPS DROPPING INTO THE LOWER 20S AT BYG AFTER A MORNING HIGH IN THE MID 30S. THIS FRONTAL BOUNDARY WILL CONTINUE TO SAG SOUTH THIS EVENING WITH A REINFORCING SHOT COMING IN WEDNESDAY MORNING AS THE TROUGH MOVES IN ALOFT. COMBINATION OF THIS FRONT AND SOME GENTLE ISENTROPIC UPGLIDE OVER THE BOUNDARY SHOULD PRODUCE WIDESPREAD LIGHT SNOW IN OUR NERN ZONES TONIGHT WITH A CHANCE FURTHER SOUTH. FRONT PUSHES THROUGH ALL OF CENTRAL WYO IN THE 12Z TO 15Z TIMEFRAME WITH SNOW FOLLOWING QUICKLY. COMBINATION OF QG FORCING AND TAIL END OF A JET STREAK COMBINED WITH DECENT UPSLOPE SHOULD PRODUCE A PERIOD OF LIGHT TO MODERATE SNOW IN THE CENTRAL ZONES WEDNESDAY MORNING WITH LIGHTER SNOW OR FLURRIES IN THE AFTERNOON. COULD POSSIBLE NEED AN ADVISORY FOR THE LANDER FOOTHILLS IF SNOW RATIO IS IN THE 18-1 RATIO AS THE HPC MEAN INDICATES AS WE EXPECT ABOUT .20 TO .25 INCHES OF LIQUID. THE SOUTH SIDE OF CASPER WILL HAVE TO BE WATCHED ALSO BUT MOST OF THE AREA WILL GENERALLY SEE 1 TO 2 INCHES. THE ADJACENT E SLOPE OF THE WINDS COULD ALSO SEE A QUICK SHOT OF 4-8 INCHES WITH 3 TO 6 ON CPR MTN. THE ODDS WILL INCREASE FOR CPR MTN AND CPR IF SOME LIGHT SNOW DEVELOPS AHEAD OF THE MAIN FROPA WED MORNING. THE GFS INDICATES THE BEST CHANCE OF THIS AFTER MIDNIGHT. SOME LIGHT SNOW WILL DEVELOP ACROSS THE I80 CORRIDOR LATER TONIGHT AND THEN THE FRONT WILL MOVE INTO THE ERN PART OF SWEETWATER COUNTY WEDNESDAY AFTERNOON FOR CONTINUED LIGHT SNOW. QUICK SHOT FOR MOST AREAS AND WE'LL NEED THE UPPER SUPPORT TO HIT ANY POTENTIAL ADVSRY NUMBERS. ALSO A CHANCE OF SOME EVENING SNOW SHOWERS THAT THE NAM IS SHOWING AND TO A LESSER EXTENT THE GFS/ECMWF. HOWEVER...THE MODELS ARE ALL WARMING THE TO MID TO UPPER LEVEL TEMPS AFTER 00Z SO LAPSE RATES SHOULD DECREASE WHICH IS A NEGATIVE. ADDED SOME CHANCE POPS DOWNWIND OF OUR FAVORED NW FAVORED AREAS BUT NOTHING TO MUCH YET. AS THIS SYSTEM EXITS...THE NEXT JET MOVES QUICKLY IN WITH INCREASING BARRIER FLOW INTO THE ABSAROKAS THURSDAY INTO THURSDAY NIGHT. POTENTIAL MOUNTAIN WAVE AND MORE CERTAIN GAP FLOW EVENT WILL LIKELY DEVELOP ON THURSDAY AND PEAK THURSDAY NIGHT. CRANKED UP THE WINDS CONSIDERABLY IN THIS AREA. MORE ISENTROPIC LIFT WILL BRING SOME LIGHT SNOW BACK INTO THE MTNS THURSDAY INTO FRIDAY BUT RIGHT NOW IT LOOKS LIGHT. SHARPLY COLDER BEHIND OUR SYSTEM WEDNESDAY NIGHT WITH BITTER COLD LOWS OUT WEST AND MORE LIKE JANUARY AGAIN JUST ABOUT EVERYWHERE. COLD DOESN'T LOOK TO STICK AROUND REAL LONG BUT A QUICK CHANGE BACK AFTER A MILD COUPLE DAYS. LONG TERM...FRIDAY NIGHT THROUGH TUESDAY MEDIUM RANGE MODELS ARE IN GOOD AGREEMENT WITH NORTHWEST FLOW OVER THE REGION...AND A COUPLE OF CLIPPER SYSTEMS AFFECTING THE AREA NEXT WEEKEND. EARLY FRIDAY...A SHORTWAVE TROUGH IS PROJECTED TO BE OFF THE BRITISH COLUMBIA COAST. THIS SYSTEM IS EXPECTED TO DIVE SOUTHEAST IN THE NORTHWEST FLOW INTO THE PACIFIC NORTHWEST FRIDAY. THIS SYSTEM IS EXPECTED THEN TO PUSH SOUTHEAST ACROSS THE INTERMOUNTAIN WEST FRIDAY NIGHT...ALLOWING SNOWFALL TO BREAK OUT ACROSS THE WEST/NORTHWEST. ON SATURDAY AND SATURDAY NIGHT THIS SYSTEM IS EXPECTED TO CONTINUE DIVING SOUTHEAST ACROSS THE CENTRAL/SOUTHERN ROCKIES. THE ASSOCIATED COLD FRONT IS EXPECTED TO PUSH ACROSS THE REGION SATURDAY/SATURDAY EVENING. MEDIUM RANGE MODELS ARE A BIT FARTHER NORTHEAST WITH THIS SYSTEM TONIGHT...THAN LAST NIGHT RESULTING IN A BETTER CHANCE FOR SNOWFALL ESPECIALLY EAST OF THE DIVIDE SATURDAY/SATURDAY NIGHT. ON THE HEELS OF THE FIRST CLIPPER SYSTEM SATURDAY...ANOTHER CLIPPER IS PROJECTED BY MEDIUM RANGE MODELS TO BE IN THE GENERAL NORTHWEST FLOW SUNDAY/SUNDAY NIGHT. HOWEVER...THEY DISAGREE ON THE TRACK. THE 00Z GEM IS BY THE FARTHEST WEST TAKING IT ACROSS IDAHO/SW WYOMING...WHILE THE GFS AND ECMWF HAVE BEEN A BIT SLOWER AND TRACKING THIS SYSTEM ACROSS THE NORTHERN HIGH PLAINS...AND THEN BECOMING CLOSED OFF ACROSS THE MIDWEST MONDAY. TRENDED TOWARD THE GFS AND ECMWF TRACK WITH THE SECOND SYSTEM...WHICH WOULD RESULT IN MUCH LOWER CHANCE FOR SNOWFALL. IT ALSO HAS LESS MOISTURE TO WORK WITH THAN THE FIRST SYSTEM. MEDIUM RANGE MODELS THEN TRY TO BUILD IN A RIDGE MONDAY NIGHT AND TUESDAY ACROSS THE AREA...BUT PREVIOUS MODEL RUNS HAVE SHOWN THE NORTHWEST FLOW CONTINUING. ALTHOUGH THE 00Z ECMWF DOES DEVELOP A RIDGE MONDAY NIGHT/TUESDAY...IT IS ALSO BREAKS THE RIDGE DOWN WITH ANOTHER SHORTWAVE TROUGH AFFECTING THE FORECAST AREA TUESDAY NIGHT/WEDNESDAY...WHILE THE GFS HOLDS ON TO THE RIDGE. HAVE INCREASED POPS CONSIDERABLY FRIDAY NIGHT THROUGH SATURDAY NIGHT ACROSS THE AREA...AS CONFIDENCE IS GROWING ON THIS CLIPPER SYSTEM...BUT KEPT POPS LOW FOR THE REST OF THE EXTENDED DUE MODEL INCONSISTENCIES. AVIATION... THE NEXT STORM WILL IMPACT WYOMING TONIGHT AND WEDNESDAY. LIGHT SNOW WILL DEVELOP IN THE WEST THIS EVENING WITH MVFR CIGS AND VSBYS EXPECTED. LCL IFR CIGS AND VSBYS ARE POSSIBLE UNDER MODERATE TO HEAVY SNOW. WIDESPREAD MTN OBSCURATIONS WILL ACCOMPANY THE SNOW. THE SNOW IN THE WEST WILL LET UP IN THE LATE MORNING...WITH SHOWERS PERSISTING ESPECIALLY OVER THE MOUNTAINS THROUGHOUT THE DAY. A COLD FRONT WILL MOVE INTO NORTHERN WYOMING EARLY WEDNESDAY MORNING AND INTO CENTRAL WYOMING BY MID/LATE MORNING. LIGHT SNOW ACCOMPANIES THE FRONT WITH MVFR CIGS AND VSBYS. TAF SITES LOCATED ADJACENT TO NORTH TO EAST FACING MOUNTAIN SLOPES WILL SEE EXTENDED PERIODS OF -SN...WHILE THOSE AWAY FROM THE MOUNTAIN COULD SEE 4 TO 6 HOURS WORTH. A COLD FRONT THAT BACKED INTO JOHNSON COUNTY THIS MORNING WILL REMAIN WITH SOME LIGHT SNOW AND IFR CIGS POSSIBLE THERE THIS EVENING AND TOMORROW MORNING...BEFORE THE PACIFIC COLD FRONT MOVES IN. FIRE WEATHER... ANOTHER STORM SYSTEM WILL BRING WIDESPREAD SNOW TO THE WEST TONIGHT AND WEDNESDAY MORNING. EAST OF THE DIVIDE...ANOTHER COLD FRONT WILL SAG SOUTHWARD OVERNIGHT WITH WITH LIGHT SNOW SPREADING SOUTHWARD ON GUSTY NORTH WINDS. THE SYSTEM WILL MOVE OFF WEDNESDAY NIGHT WITH A CLEARING SKY AND SHARPLY COLDER TEMPERATURES. WINDS WILL RETURN TO THE WIND CORRIDOR AND CODY FOOTHILLS THURSDAY INTO THURSDAY NIGHT. && .RIW WATCHES/WARNINGS/ADVISORIES... WINTER WEATHER ADVISORY FROM 5 PM THIS AFTERNOON TO 11 AM MST WEDNESDAY WYZ012-013-023>025. && SHORT TERM...SKRBAC LONG TERM...WM AVIATION...TWB FIRE WEATHER...SKRBAC
Hazardous weather outlook, Jan 18, 2:01 PM MST, 8 hours 47 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 201 PM MST TUE JAN 18 2011 WYZ001>020-022>030-191200- 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- 201 PM MST TUE JAN 18 2011 ...WINTER WEATHER ADVISORIES FOR MUCH OF FAR WESTERN WYOMING TONIGHT THROUGH WEDNESDAY MORNING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING. .DAY ONE...TODAY AND TONIGHT A PACIFIC DISTURBANCE WILL MOVE INTO WESTERN WYOMING TONIGHT... BRINGING A PERIOD OF MODERATE TO HEAVY SNOW. EXPECT HAZARDOUS DRIVING CONDITIONS WITH SNOW COVERED AND SLICK ROADS AND PERIODS OF REDUCED VISIBILITY LATE TODAY AND OVERNIGHT. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY SNOWFALL FROM OUR FAR WESTERN WYOMING STORM WILL VARY FROM 2 TO 5 INCHES ACROSS THE LOWER ELEVATIONS WITH 5 TO 10 INCHES IN THE MOUNTAINS. A CANADIAN COLD FRONT WILL PUSH SOUTH ACROSS CENTRAL WYOMING EARLY WEDNESDAY...USHERING IN MUCH COLDER TEMPERATURES AND PERIOD OF LIGHT TO MODERATE SNOW. EXPECT THE POTENTIAL FOR HAZARDOUS WINTER DRIVING CONDITIONS OVER PORTIONS OF CENTRAL WYOMING WEDNESDAY. SNOWFALL WILL GENERALLY RANGE FROM 1 TO 3 INCHES EAST OF THE DIVIDE. ANOTHER WINTER STORM WILL AFFECT THE AREA NEXT WEEKEND. SNOW WITH THIS SYSTEM IS EXPECTED TO AFFECT AREAS ALONG AND WEST OF THE DIVIDE FRIDAY NIGHT INTO SATURDAY...SHIFTING EAST OF THE DIVIDE ON SATURDAY. AT THIS TIME...SIGNIFICANT SNOWFALL COULD OCCUR OVER WESTERN WYOMING FRIDAY NIGHT INTO SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. TEAM RIVERTON
In the hours before
Local storm report, Jan 18, 10:45 PM MST, 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1145 PM MDT TUE JAN 18 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1119 PM SNOW ALPINE 43.18N 111.03W
01/18/2011 M2.00 INCHES LINCOLN WY TRAINED SPOTTER
1119 PM SNOW JACKSON 43.47N 110.75W
01/18/2011 M3.00 INCHES TETON WY PUBLIC
1120 PM SNOW JACKSON 43.47N 110.76W
01/18/2011 M5.00 INCHES TETON WY PUBLIC
1120 PM SNOW AFTON 42.72N 110.93W
01/18/2011 M5.00 INCHES LINCOLN WY LAW ENFORCEMENT
1120 PM SNOW 1 SE THAYNE 42.90N 110.98W
01/18/2011 M5.00 INCHES LINCOLN WY PUBLIC
1121 PM SNOW WILSON 43.49N 110.87W
01/18/2011 M4.00 INCHES TETON WY TRAINED SPOTTER
1122 PM SNOW 5 E MORAN 43.85N 110.42W
01/18/2011 M3.00 INCHES TETON WY PUBLIC
1123 PM SNOW 8.6 NNW JACKSON 43.58N 110.85W
01/18/2011 M4.00 INCHES TETON WY PARK/FOREST SRVC
JACKSON HOLE-BASE
1123 PM HEAVY SNOW 9.3 NNW JACKSON 43.59N 110.84W
01/18/2011 M7.00 INCHES TETON WY PARK/FOREST SRVC
JACKSON HOLE-MID
1123 PM SNOW 17.2 E THAYNE 42.97N 110.61W
01/18/2011 E4.00 INCHES LINCOLN WY PARK/FOREST SRVC
BLIND BULL SUMMIT
1123 PM SNOW 14.3 E THAYNE 42.87N 110.71W
01/18/2011 E2.00 INCHES LINCOLN WY PARK/FOREST SRVC
BOX Y RANCH
1123 PM SNOW 23 NW DUBOIS 43.73N 110.01W
01/18/2011 E3.00 INCHES FREMONT WY PARK/FOREST SRVC
BROOKS LAKE LODGE
1123 PM HEAVY SNOW 9.9 NNW JACKSON 43.60N 110.85W
01/18/2011 M7.00 INCHES TETON WY PARK/FOREST SRVC
JACKSON HOLE-RAYMER
1123 PM HEAVY SNOW JACKSON HOLE-RENDEZVOUS 43.59N 110.87W
01/18/2011 M8.00 INCHES TETON WY PARK/FOREST SRVC
1127 PM HEAVY SNOW 1 S JACKSON 43.46N 110.76W
01/18/2011 M6.00 INCHES TETON WY PUBLIC
SNOW KING SKI AREA
&&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.