Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 36, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 1, 2012, 2:51 PM MDT for Garfield County, Utah. It was in force for 4 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 1, 2012, 2:51 PM MDT (20:51 UTC)
- Expired
- Aug 1, 2012, 6:45 PM MDT
- In force
- 4 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Garfield County, UT
The radar
The Cedar City radar (KICX), 110 km from the middle of the area, began a volume at 20:54 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 |
|---|---|---|---|
| Aug 1, 3:05 PM MDT | FLASH FLOOD | 3 W Escalante, UT | WATER FROM THE ESCALANTE RIVER FLOWING OVER HIGHWAY 12. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 8.9 hours before the alert went out and 281 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
- 259 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 863 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
784
WGUS55 KSLC 012051
FFWSLC
UTC017-020045-
/O.NEW.KSLC.FF.W.0036.120801T2051Z-120802T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
251 PM MDT WED AUG 1 2012
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL GARFIELD COUNTY IN UTAH
* UNTIL 645 PM MDT
* AT 242 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN FROM A THUNDERSTORM OVER THE ESCALANTE RIVER DRAINAGE
INCLUDING ALVEY AND WIDE HOLLOW DRAINAGES. AS A RESULT...FLASH
FLOODING IN THESE AREAS ARE EXPECTED.
* RADAR RAINFALL ESTIMATES IN THESE AREAS INCLUDE AMOUNTS OF 1.75
INCHES IN AN HOURS TIME.
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 3785 11189 3795 11178 3783 11143 3770 11122
3763 11127 3757 11167 3767 11187
$$
MCINERNEY2 follow-up statements
178
WGUS75 KSLC 012343
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
543 PM MDT WED AUG 1 2012
UTC017-020045-
/O.CON.KSLC.FF.W.0036.000000T0000Z-120802T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GARFIELD UT-
543 PM MDT WED AUG 1 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM MDT FOR
CENTRAL GARFIELD COUNTY...
AT 530 PM MDT...SR 12 ALONG THE ESCALANTE RIVER EXPERIENCED FLASH
FLOODING DUE TO THE HEAVY RAINFALL EXPERIENCED EARLIER.
ADDITIONALLY IT IS INFERRED THAT ALVEY AND HARRIS WASHES...BOTH
TRIBUTARIES TO THE ESCALANTE RIVER...ARE FLASH FLOODING.
RAINFALL IN THE AREA HAS DIMINISHED...HOWEVER...TRAVEL TIME FOR THE
FLOOD WATERS TO TERMINATE IS EXPECTED TO THE EVENING HOURS. IF YOU
ARE TRAVELING IN THIS AREA PLEASE USE GOOD JUDGEMENT TO ENSURE FOR
YOUR SAFETY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3785 11189 3795 11178 3783 11143 3770 11122
3763 11127 3757 11167 3767 11187
$$
MCINERNEY349
WGUS75 KSLC 020041
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
641 PM MDT WED AUG 1 2012
UTC017-020046-
/O.EXP.KSLC.FF.W.0036.000000T0000Z-120802T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GARFIELD UT-
641 PM MDT WED AUG 1 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 645 PM MDT FOR CENTRAL
GARFIELD COUNTY...
PRECIPITATION HAS DIMINISHED OVER THE ESCALANTE RIVER DRAINAGE
INCLUDING ALVEY AND HARRIS WASHES WHERE FLASH FLOODING HAD BEEN
REPORTED EARLIER. ALTHOUGH STREAM LEVELS MAY STILL BE RUNNING HIGH
IN SOME AREAS...THE WATER WILL GRADUALLY RECEDE THROUGH THE EVENING
HOURS. MONITOR NOAA WEATHER RADIO OR LOCAL TELEVISION OR RADIO FOR
THE LATEST WEATHER INFORMATION.
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 3785 11189 3795 11178 3783 11143 3770 11122
3763 11127 3757 11167 3767 11187
$$
LCThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 6:30 PM MDT | Flash Flood Warning | SLC | Iron | 4 hr |
| Jul 31, 6:30 PM MDT | Special Weather Statement | SLC | Kane | 30 min |
| Jul 31, 10:51 PM MDT | Flash Flood Warning | SLC | Washington | 4 hr |
| Aug 1, 2:30 AM MDT | Flash Flood Watch | SLC | 20 hr | |
| Aug 1, 3:09 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 6 hr |
| Aug 1, 4:05 PM MDT | Flash Flood Warning | SLC | Kane | 4 hr |
| Aug 1, 5:17 PM MDT | Flash Flood Warning | SLC | Washington | 4 hr |
| Aug 1, 5:23 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 4 hr |
| Aug 1, 5:27 PM MDT | Flash Flood Warning | SLC | Carbon, Emery | 4 hr |
Nearby
Flash Flood Warnings in Utah, 2012Every flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.