Heavy rain on the Corner Canyon burn scar caused two debris flows over a four day period.
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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.
Heavy rain on the Corner Canyon burn scar caused two debris flows over a four day period.
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 Jun 17, 2:50 PM MST, 6 hours 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SALT LAKE CITY UT 350 PM MDT WED JUN 17 2009 .SYNOPSIS...A SERIES OF DISTURBANCES WILL CONTINUE TO MOVE ACROSS UTAH THROUGH TONIGHT...KEEPING COOL AND UNSETTLED CONDITIONS ACROSS THE AREA. A DRIER AND WARMER AIRMASS WILL BRIEFLY SPREAD INTO THE AREA THURSDAY BEFORE ANOTHER SERIES OF STORMS IMPACT THE AREA FOR THE WEEKEND. && .DISCUSSION...AN UPPER LEVEL TROUGH REMAINS ACROSS THE GREAT BASIN THIS AFTERNOON WITH ANOTHER TROUGH APPROACHING FROM THE WEST. THIS FIRST TROUGH HAS A DISTURBANCE OVER NORTH CENTRAL ARIZONA WHICH WILL CONTINUE TO MOVE NORTHEAST ACROSS SOUTHERN AND EASTERN UTAH THIS AFTERNOON AND EVENING. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS HAVE DEVELOPED ALONG THE NORTHWEST EDGE OF THIS SYSTEM OVER THE SOUTHWEST MOUNTAINS. THIS SHORTWAVE WILL IMPACT SOUTHERN AND EASTERN UTAH THROUGH LATE THIS EVENING BEFORE WEAKENING AND MOVING INTO WESTERN COLORADO. THE COMBINATION OF ABUNDANT MOISTURE AND THE DYNAMICS OF THE APPROACHING TROUGH FROM THE WEST WILL PRODUCE SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE NORTH THROUGH THIS AFTERNOON. THE COVERAGE WILL BECOME WIDESPREAD TONIGHT AS THE AXIS OF THE TROUGH MOVES EAST ACROSS THE AREA. HAVE HIT THE POPS HARD TONIGHT AS SO MANY INGREDIENTS ARE COMING TOGETHER FOR A WIDESPREAD RAIN EVENT. THESE INCLUDE...HIGH PWS...300-500MB VORT ADVECTION AND DIV Q...FAVORABLE 300-500MB LAPSE RATE...500-700MB THETA-E AXIS...AND A WELL DEFINED 700MB TROUGH AXIS. THE NORTHWEST FLOW BEHIND THE TROUGH AXIS REMAINS MOIST THROUGH MID MORNING ALONG THE WASATCH FRONT SO HAVE KEPT POPS IN THE LIKELY RANGE THROUGH MID MORNING. STRONG MID LEVEL DRYING WILL DEVELOP BY MIDDAY ACROSS THE NORTH AND FARTHER SOUTH THE EAST THE DRYING WILL TAKE PLACE DURING THE AFTERNOON. A SHORTWAVE RIDGE WILL PREVAIL THURSDAY NIGHT THROUGH FRIDAY BUT AS ANOTHER TROUGH DEVELOPS RAPIDLY OVER CALIFORNIA FRIDAY AFTERNOON THE WINDS ALOFT WILL SHIFT TO SOUTHERLY IMPORTING MOISTURE WAS LINGERING OVER ARIZONA. COULD SEE SHOWERS AS EARLY AS FRIDAY EVENING ACROSS THE HIGHER TERRAIN OF EXTREME SOUTHERN UTAH. BY SATURDAY THE MOIST SOUTHERLY FLOW WILL COVER THE ENTIRE AREA. ALTHOUGH THE MOISTURE LOOKS PLENTIFUL ON THE GFS THE EC IS WEAKER WITH THE MOISTURE SURGE SO HAVE NOT GONE TOO WILD WITH POPS AT THIS TIME. FROM SUNDAY ON...THE 500MB HEIGHTS OF THE EC REMAIN ABOUT 60M HIGHER THAN THE GFS AND HAS LESS AMPLITUDE TO THE TROUGH OVER THE PACIFIC NORTHWEST. HAVE LEANED TOWARD THE EC BUT KEPT A LOW POP IN SOME NORTHERN AREAS JUST IN CASE THE GFS IS CORRECT. && .AVIATION...VFR CONDITIONS ARE EXPECTED TO PREVAIL AT THE SLC TERMINAL...THOUGH CEILINGS WILL GENERALLY REMAIN BELOW 6000 FT AGL. THERE IS A 20 PERCENT CHANCE THAT HEAVIER SHOWERS WILL TEMPORARILY REDUCE CONDITIONS TO MVFR. WINDS SHOULD BE OUT OF THE NORTHWEST UNTIL THEY SHIFT TO THE SOUTHEAST BETWEEN 03Z AND 04Z...BUT NEARBY THUNDERSTORMS WILL RESULT IN SOME PERIODS OF GUSTY AND ERRATIC WINDS. THERE IS A 30 PERCENT CHANCE THAT A THUNDERSTORMS WILL DIRECTLY IMPACT THE TERMINAL BEFORE 03Z. && .SLC WATCHES/WARNINGS/ADVISORIES... UT...NONE. WY...NONE. && PUBLIC...STRUTHWOLF AVIATION...TRAPHAGAN 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 540 AM MDT WED JUN 17 2009 UTZ001>016-019>021-517-518-WYZ021-181200- CACHE VALLEY/UTAH PORTION-NORTHERN WASATCH FRONT- SALT LAKE AND TOOELE VALLEYS-SOUTHERN WASATCH FRONT- GREAT SALT LAKE DESERT AND MOUNTAINS-WASATCH MOUNTAIN VALLEYS- WASATCH MOUNTAINS I-80 NORTH-WASATCH MOUNTAINS SOUTH OF I-80- WESTERN UINTA MOUNTAINS-WASATCH PLATEAU/BOOK CLIFFS- WESTERN UINTA BASIN-CASTLE COUNTRY-SAN RAFAEL SWELL- SANPETE/SEVIER VALLEYS-WEST CENTRAL UTAH-SOUTHWEST UTAH- UTAHS DIXIE AND ZION NATIONAL PARK-SOUTH CENTRAL UTAH- GLEN CANYON RECREATION AREA/LAKE POWELL-CENTRAL MOUNTAINS- SOUTHERN MOUNTAINS-SOUTHWEST WYOMING- 540 AM MDT WED JUN 17 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF UTAH AND SOUTHWEST WYOMING. .DAY ONE...TODAY AND TONIGHT SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY AND TONIGHT...PRIMARILY ACROSS NORTHERN AND CENTRAL UTAH. SOME OF THESE STORMS MAY BECOME STRONG...CAPABLE OF PRODUCING LOCALLY HEAVY RAINFALL IN ADDITION TO SMALL HAIL AND FREQUENT CLOUD TO GROUND LIGHTNING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY HIGH PRESSURE IS EXPECTED TO BUILD ACROSS THE OUTLOOK AREA LATE THURSDAY INTO FRIDAY...BRINGING A BRIEF DRYING AND WARMING TREND. ANOTHER SERIES OF WEATHER DISTURBANCES ARE EXPECTED TO IMPACT THE AREA DURING THE UPCOMING WEEKEND. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
The Salt Lake City radar (KMTX), 99 km away, was scanning. The volume nearest the first event began at 04:08 UTC.
2 flash flood. Local standard time, as filed.
Heavy rain caused a debris flow at the Corner Canyon burn scar. Three homes were damaged, including flooding and debris in two basements, a garage, and a pool.
Additional heavy rain at the Corner Canyon burn scar caused another debris flow. This one was channeled down a street and property damage was averted.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Utah in 2009Every state in 2009This day in weather historyWarnings in Utah, June 2009
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: 185277, 185272.