Alert archive / Utah / Special Weather Statements in 2009
Special Weather Statement, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this special weather statement at Aug 6, 2009, 2:42 PM MDT for Duchesne County, Utah. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 6, 2009, 2:42 PM MDT (20:42 UTC)
- Expired
- Aug 6, 2009, 3:30 PM MDT
- In force
- 48 min
- Issued by
- NWS Salt Lake City, UT
County Duchesne County, UT
The radar
The Salt Lake City radar (KMTX), 199 km from the middle of the area, began a volume at 20:43 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.
The nearest sounding before it
Grand Junction, CO (KGJT), launched 12:00Z, 8.7 hours before the alert went out and 212 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
- 2876 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, 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 this special weather statement went out at Aug 6, 10:44 AM MDT, 3 hours 58 minutes earlier.
Area forecast discussion, Aug 6, 10:44 AM MDT, 3 hours 58 minutes before
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</html>Hazardous weather outlook, Aug 6, 7:07 AM MDT, 7 hours 35 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 707 AM MDT THU AUG 6 2009 UTZ001>016-019>021-517-518-WYZ021-071300- 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- 707 AM MDT THU AUG 6 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF UTAH AND SOUTHWEST WYOMING. .DAY ONE...TODAY AND TONIGHT AN UNUSUALLY STRONG COLD FRONT WILL SWEEP ACROSS NEVADA TODAY. THIS FRONT WILL GENERATE STRONG SOUTHERLY WINDS THIS AFTERNOON THROUGH THIS EVENING...WITH THE STRONGEST WINDS ACROSS THE WESTERN VALLEYS OF UTAH. A WIND ADVISORY WILL BE IN EFFECT FOR THE WESTERN VALLEY OF UTAH LATE THIS MORNING THROUGH EVENING. VERY LOW RELATIVE HUMIDITIES ALONG WITH THE STRONG WINDS WILL LEAD TO HAZARDOUS FIRE WEATHER CONDITIONS ACROSS MOST VALLEYS OF UTAH THROUGH TONIGHT. SCATTERED THUNDERSTORMS ACROSS NORTHERN UTAH EARLY THIS MORNING WILL MOVE NORTH OF THE STATE DURING THE MORNING HOURS. ADDITIONAL THUNDERSTORMS ARE POSSIBLE LATER TODAY AHEAD OF THE COLD FRONT...MAINLY OVER FAR NORTHERN. THUNDERSTORMS ACROSS SOUTHERN UTAH WILL SHIFT INTO EASTERN UTAH AND INCREASE IN AREAL COVERAGE THROUGHOUT THE DAY. THE COLD FRONT WILL MOVE ACROSS NORTHERN AND WESTERN UTAH TONIGHT. SIGNIFICANTLY COOLER AIR WILL FOLLOW THE FRONT INTO NORTHWEST UTAH LATE TONIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE COLD FRONT THAT CROSSES THE STATE TONIGHT WILL LEAVE MUCH COOLER AIR OVER THE AREA THROUGH SATURDAY. WIDESPREAD PRECIPITATION WILL DEVELOP ACROSS NORTHERN UTAH LATE FRIDAY THROUGH EARLY SATURDAY AS THE CORE OF THE STORM SYSTEM MOVES THROUGH NORTHERN UTAH. A SECOND WEAK WEATHER DISTURBANCE WILL FOLLOW FOR SATURDAY NIGHT THROUGH SUNDAY...BRINGING ADDITIONAL LIGHT PRECIPITATION TO FAR NORTHERN UTAH. SOUTHERN UTAH WILL REMAIN ON THE DRY BUT COOLER SIDE THIS WEEKEND. BREEZY CONDITIONS ARE LIKELY ACROSS EXTREME SOUTHERN AND SOUTHEAST UTAH THIS WEEKEND. HIGH PRESSURE ALOFT WILL REBOUND ACROSS THE AREA BEGINNING LATE SUNDAY. A WARMING TREND WILL BEGIN EARLY NEXT WEEK...AND CONTINUE INTO MIDWEEK. .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)
In the hours before
Special weather statement, Aug 6, 2:42 PM MDT, 0 minutes before
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</html>The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 6:06 PM MDT | Special Weather Statement | SLC | Summit | 39 min |
| Aug 5, 6:14 PM MDT | Special Weather Statement | SLC | Davis | 46 min |
| Aug 6, 1:10 PM MDT | High Wind Warning | SLC | 10 hr | |
| Aug 6, 3:34 PM MDT | Special Weather Statement | SLC | Duchesne | 41 min |
Nearby
Special Weather Statements in Utah, 2009Every special weather statement in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.