A powerful Pacific storm system brought as much as a foot of snow to the mountains of northern Utah, with as much as 2 inches of rain in central Utah.
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 SLC wrote it up.
A powerful Pacific storm system brought as much as a foot of snow to the mountains of northern Utah, with as much as 2 inches of rain in central Utah.
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 Salt Lake City, UT wrote its last area forecast discussion before the first event at May 3, 8:51 PM MST, 9 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 951 PM MDT THU MAY 3 2007 .SYNOPSIS...A LARGE COOL UPPER TROUGH OVER THE WESTERN STATES TONIGHT WILL BECOME A CLOSED LOW OVER SOUTHERN UTAH BY FRIDAY EVENING. THIS LOW WILL TRACK SLOWLY EAST INTO COLORADO THROUGH THE WEEKEND. && .DISCUSSION...A LARGE UPPER TROF REMAINS IN PLACE OVER THE WEST THIS EVENING. ONE STRONG VORT MAX IS MOVING INTO THE WESTERN PLAINS WHILE A STRONG SECOND MAX IS DROPPING SOUTH THROUGH CA. UT IS COMING UNDER A WEAK SHORT WAVE RIDGE BETWEEN THESE FEATURES AND ANY LINGERING CONVECTIVE PRECIP WILL BE MAINLY LIMITED TO THE NORTH AND SHOULD WIND DOWN BY MIDNIGHT. NO REAL ADDITIONAL ACCUMULATION IS EXPECTED IN THE MTNS SO WILL ALLOW SNOW ADVISORY END AT 04Z. THE SURFACE FRONT MADE IT ALMOST TO THE SRN UT BORDER EARLY TODAY THEN SHIFTED BACK NORTH A BIT IN THE AFTERNOON AS A WAVE FORMED ALONG IT OVER SRN NV AHEAD OF THE CA VORT MAX. THE AIRMASS SOUTH OF THIS BOUNDARY DRIED OUT AND WINDS INCREASED ENOUGH TO BRING FIRE WEATHER CONDITIONS TO NEAR CRITICAL LEVELS. THE WINDS HAVE NOW DROPPED OFF ALTHO THE AIRMASS REMAINS VERY DRY. WILL LET RED FLAG WARNING EXPIRE AS SCHEDULED. THIS NEXT WAVE IS FORECAST TO SPREAD ANOTHER ROUND OF PRECIP INTO THE FORECAST AREA BY TOMORROW MORNING CONTINUING THROUGH THE DAY AS IT CLOSES OFF INTO AN UPPER LOW OVER CENTRAL/SRN UT. THIS LOW THEN TRACK SEWD TO NEAR 4 CORNERS BY SAT MORNING THEN IT LIFTS SLOWLY NEWD ACROSS CO SAT. PRECIP FRI WILL BE PRIMARILY CONVECTIVE BUT LARGE SCALE FORCING COULD FOCUS ACTIVITY IN CENTRAL UT CLOSER TO THE DEVELOPING UPPER LOW. WRAPAROUND PRECIP IS FORECAST TO PERSIST OVER THE NORTH AND WEST FRI NIGHT INTO SAT THEN THE LOW MOVES FAR ENOUGH EAST AND WE START TO DRY OUT SUN. WARM RIDGING RETURNS TO THE AREA NEXT WEEK. FOR THE REST OF TONIGHT...THE THREAT OF ANY MORE PRECIP DOWN SOUTH IS PRETTY SMALL BUT WILL ALLOW LOW POPS TO RIDE AS IT MAY REDEVELOP BEFORE SUNRISE AHEAD OF THE CA SHORT WAVE. && .AVIATION...WINDS WILL CONTINUE TO TRANSITION FROM NORTH TO SOUTHEAST THROUGH 0430Z AT THE SLC TERMINAL. SOUTHEAST DRAINAGE WINDS WILL CONTINUE THROUGH ABOUT 16Z FRIDAY. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...NONE. WY...NONE. && WILENSKY/STRUTHWOLF FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 938 AM MDT THU MAY 3 2007 UTZ001>018-WYZ021-041200- CACHE VALLEY/UTAH PORTION-CASTLE COUNTRY- CENTRAL AND SOUTHWEST MOUNTAINS-GREAT SALT LAKE DESERT AND MOUNTAINS- HENRY MOUNTAINS-NORTHERN WASATCH FRONT-SALT LAKE AND TOOELE VALLEYS- SAN RAFAEL SWELL-SANPETE/SEVIER VALLEYS-SOUTHERN WASATCH FRONT- SOUTHWEST UTAH-SOUTHWEST WYOMING-WASATCH MOUNTAIN VALLEYS- WASATCH MOUNTAINS I-80 NORTH-WASATCH MOUNTAINS SOUTH OF I-80- WASATCH PLATEAU/BOOK CLIFFS-WEST CENTRAL UTAH-WESTERN UINTA BASIN- WESTERN UINTA MOUNTAINS- 938 AM MDT THU MAY 3 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MOST OF THE WESTERN AND NORTHERN TWO-THIRDS OF UTAH AND EXTREME SOUTHWEST WYOMING. .DAY ONE...TODAY NUMEROUS SHOWERS WILL OCCUR TODAY ALONG WITH A FEW THUNDERSTORMS. SNOW LEVELS WILL BE NEAR 6500 FEET. REFER TO WINTER WEATHER PRODUCTS FOR MORE DETAILS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY ANOTHER STORM SYSTEM WILL ARRIVE ON FRIDAY AND SPREAD PRECIPITATION ACROSS THE OUTLOOK AREA. THE PRECIPITATION WILL BE LOCALLY HEAVY THROUGH FRIDAY NIGHT AND THEN TAPER TO SHOWERS AND A FEW THUNDERSTORMS BY SATURDAY. SNOW LEVELS DURING THIS PERIOD WILL BE AS LOW AS 5000 FEET AT TIMES. THE MAIN UPPER LOW WILL MOVE OVER COLORADO ON SUNDAY WITH SHOWERS REDEVELOPING ACROSS THE MOUNTAINS OF UTAH AND ISOLATED SHOWERS IN THE VALLEYS. DRIER WEATHER WITH A WARMING TREND FOR EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. UTZ019>021-041200- GLEN CANYON RECREATION AREA/LAKE POWELL-SOUTH CENTRAL UTAH- UTAHS DIXIE AND ZION NATIONAL PARK- 938 AM MDT THU MAY 3 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR FAR SOUTHERN UTAH. .DAY ONE...TODAY LOW HUMIDITY AND BREEZY CONDITIONS WILL CREATE FIRE DANGER AGAIN TODAY. REFER TO FIRE WEATHER PRODUCTS FOR DETAILS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A LARGE STORM SYSTEM WILL INCREASE WIND ON FRIDAY BUT WILL BE ACCOMPANIED BY SCATTERED AFTERNOON AND EVENING SHOWERS. LOW HUMIDITY AND WIND WILL AGAIN PREVAIL NEAR THE ARIZONA BORDER WHICH COULD BRING ADDITIONAL FIRE DANGER. DRY WEATHER WITH A WARMING TREND FOR EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. TARDY
1 heavy snow. Local standard time, as filed.
Heavy snow fell within a 9-12 hour period. Thirteen inches of snow fell at Alta, with 11 inches at Snowbird. These locations also reported 1.0-1.5 inches of water equivalent.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2007Every state in 2007This day in weather historyWarnings in Utah, May 2007
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: 35578.