Alert archive / Utah / Flash Flood Warnings in 2011
Flash Flood Warning 45, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 28, 2011, 6:17 PM MDT for Washington County, Utah. It was in force for 2 hr. 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 28, 2011, 6:17 PM MDT (00:17 UTC)
- Expired
- Aug 28, 2011, 8:35 PM MDT
- In force
- 2 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Washington County, UT
The radar
The Cedar City radar (KICX), 39 km from the middle of the area, began a volume at 00:19 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 00:00Z, 0.3 hours before the alert went out and 238 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
- 44 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 3935 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
902
WGUS55 KSLC 290017
FFWSLC
UTC053-290315-
/O.NEW.KSLC.FF.W.0045.110829T0017Z-110829T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
617 PM MDT SUN AUG 28 2011
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL WASHINGTON COUNTY IN UTAH
* UNTIL 915 PM MDT
* AT 606 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN FROM SCATTERED THUNDERSTORMS OVER AN AREA EAST OF A LINE
FROM THE TOWNS OF PINTURA AND TOQUERVILLE ACROSS THE SOUTHERN HALF
OF ZION NATIONAL PARK. RADAR ESTIMATES OF 2 TO 3 INCHES HAS OCCURRED
IN PARTS OF THIS WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3741 11331 3747 11301 3738 11291 3724 11292
3722 11305 3719 11329 3727 11334
$$
STRUTHWOLF1 follow-up statement
205
WGUS75 KSLC 290235
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
835 PM MDT SUN AUG 28 2011
UTC053-290244-
/O.CAN.KSLC.FF.W.0045.000000T0000Z-110829T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-
835 PM MDT SUN AUG 28 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL
WASHINGTON COUNTY...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
LAT...LON 3741 11331 3747 11301 3738 11291 3724 11292
3722 11305 3719 11329 3727 11334
$$
STRUTHWOLFThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 6:59 PM MDT | Special Weather Statement | SLC | Tooele | 61 min |
| Aug 28, 8:35 PM MDT | Special Weather Statement | SLC | Davis, Salt Lake | 55 min |
| Aug 28, 10:41 PM MDT | Areal Flood Advisory | SLC | Salt Lake | 109 min |
| Aug 29, 3:09 PM MDT | Flash Flood Warning | SLC | Kane | 4 hr |
Nearby
Flash Flood Warnings in Utah, 2011Every flash flood warning in 2011
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.