Drought conditions remained largely unchanged across eastern Utah throughout the month of February.
Every event with a place to put it; 7 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 episode as NWS GJT wrote it up.
Drought conditions remained largely unchanged across eastern Utah throughout the month of February.
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 Grand Junction, CO wrote its last area forecast discussion before the first event at Jan 31, 9:17 PM MST, 2 hours 43 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 917 PM MST SUN JAN 31 2010 .UPDATE...QUICK UPDATE FOR THE OVERNIGHT PERIOD TO INCREASE CLOUD COVER ACROSS EASTERN UTAH AND PORTIONS OF WESTERN COLORADO AS LOW STRATUS CONTINUES TO DEVELOP OVER THIS AREA. ALSO ADDED MENTION OF FOG FOR THE VALLEYS OF EASTERN UTAH AND WEST CENTRAL COLORADO WITH SEVERAL SURFACE REPORTING SITES ALREADY INDICATING REDUCED VISIBILITIES. NO OTHER CHANGES ATTM. && .PREV DISCUSSION.../ISSUED 311 PM MST SUN JAN 31 2010/ .SHORT TERM...TONIGHT THROUGH TUESDAY... WATER VAPOR IMAGERY HIGHLIGHTING CLOSED LOW CENTERED OVER NRN ID/SRN MT CONTINUING ITS NEWRD MOVEMENT THRU REMAINDER OF MT THIS AFTN. IR SATELLITE LOOP CLEARLY SHOWS ASSOCD UPPER LEVEL DISTURBANCE/TROF TRAILING FROM LOW PRESSURE HAS MOVED THRU MUCH OF CWA AND PRODUCED VERY SCATTERED SNOW SHOWERS WITH PASSAGE. TROF HAS VERY LITTLE DYNAMICS TO WORK WITH AND NOT MUCH MOISTURE SO ANY PRECIP WILL BE SHORT-LIVED AND NOT PRODUCE ANY APPRECIABLE AMTS. IN FACT...AREAS SOUTH OF I-70 WILL MAINLY SEE PARTLY SUNNY SKIES WITH CLOUDS BECOMING MORE PREVALENT THE FURTHER N ONE GOES. AS WIND BECOMES MORE NWLY TONIGHT...MODELS CONTINUE TO PICK UP ON OROGRAPHIC LIFT OVER NRN MTNS THRU MON AFTN. TOTAL SNOW AMOUNTS LOOK TO BE 2 TO 4 INCHES ATTM. UNFORTUNATELY...WEAK TROF WILL NOT HAVE ENOUGH ENERGY TO SCOUR OUT MOST VALLEYS. THIS MEANS FOG AND LOW STRATUS WILL CONTINUE FOR VALLEYS THROUGH REMAINDER OF SHORT-TERM. BY MONDAY...HIGH PRESSURE BUILDS IN THOUGH LOWER ELEVATIONS WILL STILL CONTEND WITH INVERSIONS AND TEMPS SEVERAL DEGREES BELOW NORMAL. HIGHER ELEVATIONS SHOULD SEE SUNNY SKIES AND TEMPS NEAR NORMAL. .LONG TERM...TUESDAY NIGHT THROUGH SUNDAY... AN ENHANCED SUBTROPICAL JET STREAM CONTINUES TO MAKE ITS PRESENCE FELT...EVEN INTO THE CENTRAL ROCKIES. THERE IS GOOD AGREEMENT BETWEEN GFS EC AND SREF...THOUGH THE 18Z NAM IS SLOWER WITH MOISTURE RETURN ON WEDNESDAY AND WEDNESDAY NIGHT. TUESDAY NIGHT-WEDNESDAY: RIDGE AXIS OVERHEAD DE-AMPLIFIES AS A SPLITTING NEGATIVELY-TILTED PACIFIC TROUGH WORKS ONSHORE. MOISTURE BEGINS TO SURGE UP FROM THE SW WITH BOTH THE NAM AND GFS INCREASING PRECIPITABLE WATER VALUES TO 0.5 INCH NEAR THE FOUR-CORNERS BY WEDNESDAY AFTERNOON. BUT THE NAM PRODUCES AN EAST WIND AT 700MB ACROSS THE SOUTH THAT WOULD SLOW THE MOISTURE ADVECTION NORTHWARD. WEDNESDAY NIGHT-THURSDAY NIGHT: SPLIT TROUGH PASSAGE IN THE AFTERNOON BRINGS COLD ADVECTION TO -27C AND DRIER AIR ABOVE 500MB. GFS AND EC CONTINUE TO PRODUCE SNOWFALL ACROSS NW-FACING SLOPES. FRIDAY-SATURDAY: DIRTY RIDGE AXIS BUILDS IN FROM THE WEST...THOUGH NW FLOW COULD STILL PRODUCE SOME LIGHT SNOWFALL ACROSS THE NORTH. SUNDAY: THE NEXT NEGATIVELY-TILTED SPLITTING PACIFIC TROUGH MAKES LANDFALL...AGAIN BRINGING INCREASING MOISTURE FROM THE SW. && .AVIATION... AFTER RATHER DULL AND GREY MORNING...ALL TAF SITES REPORTING VFR CONDITIONS EXCEPT KVEL WHICH CONTINUES TO REPORT LOW STRATUS CLOUDS CAUSING MVFR CIGS. UPPER LEVEL DISTURBANCE CURRENTLY MOVING THROUGH CWA HAS INCREASED CLOUD COVER FOR AREAS N OF I-70 THOUGH CIGS REMAIN VFR. THEREFORE...MAIN CONCERN WILL BE FOG FORMATION AND LOW STRATUS OVERNIGHT AND MONDAY MORNING AS SYSTEM MOVING THRU WILL NOT BE STRONG ENOUGH TO SCOUR OUT VALLEYS. MAIN AREAS OF CONCERN WILL BE KVEL AND KGJT AS LOW VIS AND CIGS MAY CAUSE IFR CONDITIONS. BY MID-MORNING...EXPECT KVEL AND KGJT TO BE MVFR...IF NOT VFR. && .GJT WATCHES/WARNINGS/ADVISORIES... CO...NONE. UT...NONE. && UPDATE.......JDC SHORT TERM...TGR LONG TERM....JOE AVIATION.....TGR
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND JUNCTION CO 600 AM MST SUN JAN 31 2010 COZ001>014-017>023-UTZ022>025-027>029-011300- ANIMAS RIVER BASIN-ARCHES/GRAND FLAT-CANYONLANDS/NATURAL BRIDGES- CENTRAL COLORADO RIVER BASIN- CENTRAL GUNNISON AND UNCOMPAHGRE RIVER BASIN- CENTRAL YAMPA RIVER BASIN-DEBEQUE TO SILT CORRIDOR- EASTERN UINTA BASIN-EASTERN UINTA MOUNTAINS- ELKHEAD AND PARK MOUNTAINS-FLAT TOPS- FOUR CORNERS/UPPER DOLORES RIVER- GORE AND ELK MOUNTAINS/CENTRAL MOUNTAINS-GRAND AND BATTLEMENT MESAS- GRAND VALLEY-LA SAL AND ABAJO MOUNTAINS-LOWER YAMPA RIVER BASIN- NORTHWEST SAN JUAN MOUNTAINS-PARADOX VALLEY/LOWER DOLORES RIVER- ROAN AND TAVAPUTS PLATEAUS-SAN JUAN RIVER BASIN-SOUTHEAST UTAH- SOUTHWEST SAN JUAN MOUNTAINS-TAVAPUTS PLATEAU- UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE-UPPER GUNNISON RIVER VALLEY- UPPER YAMPA RIVER BASIN-WEST ELK AND SAWATCH MOUNTAINS- 600 AM MST SUN JAN 31 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN COLORADO. .DAY ONE...TODAY AND TONIGHT SNOW WILL DEVELOP FROM WEST TO EAST TODAY AS THE NEXT STORM APPROACHES. SNOW WILL BECOME WIDESPREAD OVER THE NORTHERN AND CENTRAL COLORADO MOUNTAINS...ESPECIALLY ALONG THE CONTINENTAL DIVIDE BY THIS EVENING...WITH A CHANCE OF SNOW ELSEWHERE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY SNOW WILL CONTINUE OVER THE FAVORED NORTHERN MOUNTAINS THROUGH MONDAY...DIMINISHING FROM THE WEST. BY LATE MONDAY AFTERNOON... MODERATE SNOW AMOUNTS WILL BE POSSIBLE...ESPECIALLY OVER THE PARK AND GORE RANGES THAT INCLUDE VAIL AND RABBIT EARS PASS. WEDNESDAY NIGHT AND THURSDAY...THERE WILL BE A CHANCE OF SNOW OVER THE SOUTHERN MOUNTAINS...BUT DECREASE THURSDAY NIGHT AND FRIDAY. THE WEATHER SYSTEM IS EXPECTED TO BE WEAK AND POTENTIAL SNOWFALL WILL BE LIGHT. .SPOTTER INFORMATION STATEMENT SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT. TGJT
The national radar mosaic for the moment the first event began.
7 drought. Local standard time, as filed.
Abnormally dry conditions persisted across the area, except for the northeast corner of Daggett County where moderate drought conditions had developed by the end of the month.
Abnormally dry conditions persisted across the area.
Abnormally dry conditions persisted across the area.
Abnormally dry conditions persisted across the area.
Abnormally dry conditions persisted across the area.
Drought conditions across the area remained unchanged throughout the month, with moderate drought across the south and abnormally dry conditions across northern portions of the area.
Drought conditions across the area remained unchanged throughout the month, with moderate drought across the south and abnormally dry conditions across northern portions of the area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2010Every state in 2010This day in weather historyWarnings in Utah, February 2010
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: 220936, 220937, 220938, 220939, 220940, 220941, 220942.