Alert archive / Utah / Areal Flood Warnings in 2012
Areal Flood Warning 42, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this areal flood warning at Sep 11, 2012, 12:20 PM MDT for Kane County, Utah. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 11, 2012, 12:20 PM MDT (18:20 UTC)
- Expired
- Sep 11, 2012, 4:15 PM MDT
- In force
- 4 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Kane County, UT
The radar
The Cedar City radar (KICX), 92 km from the middle of the area, began a volume at 18:20 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
Las Vegas, NV (KVEF), launched 12:00Z, 6.3 hours before the alert went out and 340 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
- 2 J/kg
- Mixed-layer CIN
- -171 J/kg
- Mixed-layer LCL
- 1725 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood warning 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 areal flood warning went out at Sep 11, 11:05 AM MDT, 1 hour 15 minutes earlier.
Area forecast discussion, Sep 11, 11:05 AM MDT, 1 hour 15 minutes before
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</html>Hazardous weather outlook, Sep 11, 3:00 AM MDT, 9 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SALT LAKE CITY UT 300 AM MDT TUE SEP 11 2012 UTZ001>016-019>021-517-518-WYZ021-121300- 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- 300 AM MDT TUE SEP 11 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF UTAH AND SOUTHWEST WYOMING. .DAY ONE...TODAY AND TONIGHT NUMEROUS SHOWERS AND THUNDERSTORMS WILL AFFECT CENTRAL AND SOUTHERN UTAH THROUGH THIS EVENING. SOME OF THESE STORMS WILL CONTAIN HEAVY RAINFALL WITH THE POTENTIAL TO CAUSE FLASH FLOODING. FLASH FLOOD PRONE AREAS INCLUDE SLOT CANYONS AND NORMALLY DRY WASHES OF SOUTHERN UTAH...AND RECENT BURN SCARS ACROSS THE STATE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY FLASH FLOODING CANNOT BE RULED OUT ACROSS SOUTHERN UTAH WEDNESDAY...THOUGH STORM COVERAGE WILL BE LESS THAN TODAY. DRIER AIR WILL FILTER INTO THE AREA FROM THE NORTH TONIGHT AND GRADUALLY SPREAD ACROSS THE REMAINDER OF UTAH BY THURSDAY MORNING ENDING THE FLASH FLOOD THREAT. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. ROGOWSKI FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE) FOR INFORMATION ON POTENTIAL TRAVEL IMPACTS VISIT... HTTP://WWW.UDOTTRAFFIC.UTAH.GOV/ROADWEATHERFORECAST.ASPX
In the hours before
Local storm report, Sep 11, 10:49 AM MDT, 1 hour 31 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 |
|---|---|---|---|---|
| Sep 10, 6:08 PM MDT | Special Weather Statement | SLC | Tooele | 22 min |
| Sep 11, 10:52 AM MDT | Areal Flood Warning | SLC | Washington | 8 hr |
| Sep 11, 12:27 PM MDT | Flash Flood Warning | SLC | Wayne | 4 hr |
| Sep 11, 1:45 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
| Sep 11, 4:20 PM MDT | Flash Flood Warning | SLC | Wayne | 3 hr |
Nearby
Areal Flood Warnings in Utah, 2012Every areal flood warning in 2012
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.