1 high wind, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The local office's own words before the first event, 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 the first event at Dec 13, 3:40 PM MST, 3 hours 5 minutes earlier.
AREA FORECAST DISCUSSION 340 PM MST SAT DEC 13 2003 .TONIGHT THROUGH MONDAY NIGHT... SNOW IN THE WEST WITH WIND IN THE EAST. WINTER STORM WARNING CONTINUES IN THE WESTERN MOUNTAINS AND VALLEYS. WITH AROUND 3 INCHES IN JACKSON AND MODERATE TO HEAVY SNOW FALLING AND ANTICIPATED CONTINUATION AND LONG DURATION OF SNOWFALL HAVE UPGRADED JACKSON HOLE AND THE STAR VALLEY FROM AN ADVISORY TO A WARNING. WILL LEAVE SUBLETTE COUNTY LOWER ELEVATIONS IN AN ADVISORY WITH NOT MUCH HAPPENING THERE YET. WIND THROUGH GREEN MOUNTAINS MARGINAL HIGH WIND THIS AFTERNOON AND EXPECT WIND TO INCREASE THIS EVENING AND CONTINUE THROUGH SUNDAY AHEAD OF COLD FRONT. LOOKS GOOD FOR LIGHT SNOW EVENT EAST OF THE DIVIDE SUNDAY NIGHT INTO SUNDAY MORNING WITH MOST AREAS RECEIVING 1 TO 3 INCHES OF SNOW. STRONG NORTH WINDS ALSO EXPECTED IN JOHNSON COUNTY SUNDA6Y NIGHT WITH COLD FRONT. TEMPERATURES EAST OF THE DIVIDE WILL REMAIN MILD WITH CHINOOK WIND AND THEN TURNING MUCH COLDER SUNDAY NIGHT AS STRONG COLD FRONT COMES THROUGH. .TUESDAY THROUGH SATURDAY... RIDGE EXPECTED TO BEGIN BUILDING ACROSS ROCKIES TUESDAY INTO WEDNESDAY BEFORE FLOW FLATTENS AND BECOMES MORE ZONAL BY LATE IN THE WEEK. DRY FORECAST STILL ON TARGET FOR TUESDAY THROUGH THURSDAY TIME FRAME UNDER UPPER LEVEL RIDGING. WITH ZONAL FLOW LATE IN THE WEEK... UNCERTAINTY IN FORECAST INCREASES WITH TIMING OF INDIVIDUAL IMPULSES IN QUICK WESTERLY FLOW. HAVE MAINTAINED LOW POPS IN WEST FOR FRIDAY AND SATURDAY WITH INCREASING WESTERLY FLOW AND ASSOCIATED MOISTURE NOSING INTO THE MOUNTAINS. TEMPERATURES CONTINUE TO BE TRICKY WITH EXTENT OF WARM-UP UNDER RIDGING MID WEEK. SOME BASINS MAY HAVE TROUBLE BREAKING INVERSIONS...ESPECIALLY IF THERE IS ANY SNOW COVER FROM SUN/MON STORM. OVERALL...CURRENT GRIDS IN GOOD SHAPE AND ONLY MADE MINOR MODIFICATIONS. && .RIW...WATCHES/WARNINGS/ADVISORIES... WINTER STORM WARNING WESTERN WYOMING TONIGHT AND SUNDAY..ZONES 001-002-012>014-015-023-024. HIGH WIND WARNING GREEN MOUNTAINS TONIGHT AND SUNDAY..ZONE 19. WINTER WEATHER ADVISORY WESTERN VALLEY ZONES...025-026. && C.BAKER/FRIEDERS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 518 AM MST SAT DEC 13 2003 WYZ001>020-022>030-141300- 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- 518 AM MST SAT DEC 13 2003 ...WINTER STORM WARNING FOR THE WESTERN WYOMING MOUNTAINS TODAY THROUGH SUNDAY... ...WINTER WEATHER ADVISORY FOR MUCH OF THE WESTERN VALLEYS OF WYOMING TODAY THROUGH SUNDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING. A MOIST WESTERLY FLOW WILL PRODUCE 8 TO 10 INCHES OF SNOW ACROSS THE WESTERN WYOMING MOUNTAINS THROUGH TONIGHT. 2 TO 4 INCHES OF SNOW WILL FALL IN THE WESTERN WYOMING VALLEYS WHERE SOME OF THE SNOW WILL BE MIXED WITH RAIN. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH THURSDAY. SNOWFALL...POSSIBLY HEAVY AT TIMES...WILL CONTINUE SUNDAY AND INTO SUNDAY NIGHT OVER WESTERN WYOMING. TOTAL SNOW ACCUMULATIONS OF 12 TO 15 INCHES ARE EXPECTED OVER THE MOUNTAINS WITH A TOTAL OF 3 TO 6 INCHES IN THE VALLEYS BY LATE SUNDAY AFTERNOON. AN ADDITIONAL 4 TO 6 INCHES OF SNOW CAN BE EXPECTED ON SUNDAY EVENING IN THE WESTERN MOUNTAINS WITH ANOTHER 1 TO 2 INCHES EXPECTED IN THE WESTERN VALLEYS. A STRONG COLD FRONT WILL PUSH SOUTHEAST ACROSS WYOMING SUNDAY NIGHT ALONG WITH SOME OF THE SNOWFALL MAKING ITS WAY EAST OF THE DIVIDE. AT LEAST A COUPLE OF INCHES OF SNOW ARE EXPECTED IN NATRONA COUNTY INCLUDING THE VICINITY OF CASPER MONDAY MORNING. THE SNOW WILL DECREASE LATER MONDAY OVER ALL AREAS. TRAVELERS ACROSS WYOMING THIS WEEKEND SHOULD MONITOR ALL WEATHER STATEMENTS...INCLUDING ADVISORIES AND POSSIBLE WARNINGS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE REQUIRED TODAY AND TONIGHT. LIPSON
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2003Every state in 2003This day in weather historyWarnings in Wyoming, December 2003
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5332113.