Alert archive / Utah / Flash Flood Warnings in 2007
Flash Flood Warning 13, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 30, 2007, 5:19 PM MDT for Washington County, Utah. It was in force for 4 hr. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 30, 2007, 5:19 PM MDT (23:19 UTC)
- Expired
- Jul 30, 2007, 9:15 PM MDT
- In force
- 4 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Washington County, UT
The radar
The Cedar City radar (KICX), 66 km from the middle of the area, began a volume at 23:19 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 30, 7:00 PM MDT | FLASH FLOOD | 2 Se St. George, UT | FORT PIERCE DRY WASH WENT FROM 0 TO 1357 CFS |
| Jul 30, 9:00 PM MDT | HEAVY RAIN 1.66 | 13 Sw Gunlock, UT | BAGDER SPRINGS RAWS IN SOUTHWEST UTAH. DRY WASHES RUNNING IN IVINS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Mercury/Desert R, NV (KDRA), launched 12:00Z, 11.3 hours before the alert went out and 234 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
- 3436 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS55 KSLC 302323
FFWSLC
UTC053-310315-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
519 PM MDT MON JUL 30 2007
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL WASHINGTON COUNTY IN UTAH...
* UNTIL 915 PM MDT
* AT 512 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A THUNDERSTORM OVER FORT PIERCE WASH LOCATED
ALONG THE UTAH/ARIZONA BORDER SOUTHEAST OF ST. GEORGE.
* RAINFALL ESTIMATES FROM THIS STORM INDICATE UP TO 2 INCHES OF
RAINFALL HAS FALLEN OVER THE FORT PIERCE WASH DRAINAGE. THIS FLASH
FLOOD IS EXPECTED TO REACH THE ST. GEORGE AREA AROUND 7 PM THIS
EVENING.
PERSONS LIVING OR VENTURING NEAR THE FORT PIERCE WASH AS IT ENTERS
THE ST. GEORGE AREA AND DESERT AREAS UPSTREAM SHOULD TAKE
PRECAUTIONS TO ENSURE THEIR SAFETY.
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 3701 11353 3700 11336 3701 11328 3705 11326
3703 11349 3708 11355 3708 11359
$$
MCINERNEY1 follow-up statement
000
WGUS75 KSLC 310140
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
737 PM MDT MON JUL 30 2007
UTC053-310315-
WASHINGTON UT-
737 PM MDT MON JUL 30 2007
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM MDT FOR SOUTH
CENTRAL WASHINGTON COUNTY...
AT 730 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORM ACTIVITY OVER THE FORT PIERCE WASH AREA. UP
TO 1.5 INCHES OF RAINFALL HAS FALLEN OVER THE DRAINAGE.
THE FORT PIERCE WASH IS HISTORICALLY A VERY FLASH FLOOD PRONE BASIN.
FLOOD WATERS ARE EXPECTED IN THE ST. GEORGE AREA THIS EVENING. AS OF
THIS WRITING...AN ABSENCE OF FLASH FLOODING HAS BEEN REPORTED.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
LAT...LON 3701 11353 3700 11336 3701 11328 3705 11326
3703 11349 3708 11355 3708 11359
$$
MCINERNEYThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 5:37 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
Nearby
Flash Flood Warnings in Utah, 2007Every flash flood warning in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.