Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 40, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 1, 2012, 5:23 PM MDT for Kane County, Washington 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 outline as issued.
The facts
- Issued
- Aug 1, 2012, 5:23 PM MDT (23:23 UTC)
- Expired
- Aug 1, 2012, 9:15 PM MDT
- In force
- 4 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kane County, UT, Washington County, UT
The radar
The Cedar City radar (KICX), 38 km from the middle of the area, began a volume at 23:25 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 11.4 hours before the alert went out and 246 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.
438
WGUS55 KSLC 012323
FFWSLC
UTC025-053-020315-
/O.NEW.KSLC.FF.W.0040.120801T2323Z-120802T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
523 PM MDT WED AUG 1 2012
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
WEST CENTRAL KANE COUNTY IN UTAH
EAST CENTRAL WASHINGTON COUNTY IN UTAH
* UNTIL 915 PM MDT
* AT 512 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN FROM A THUNDERSTORM OVER THE SOUTHEASTERN SECTION OF ZION
NATIONAL PARK. THIS AREA IS VERY FLASH FLOOD PRONE AND HAS RECEIVED
RAINFALL AMOUNTS OF 1.30 INCHES IN THE PAST SEVERAL HOURS.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ZION
NATIONAL PARK
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 3729 11298 3735 11292 3734 11284 3733 11281
3732 11280 3723 11280 3721 11281 3715 11284
3715 11297 3716 11306 3717 11308
$$
MCINERNEY2 follow-up statements
224
WGUS75 KSLC 020115
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
715 PM MDT WED AUG 1 2012
UTC025-053-020315-
/O.CON.KSLC.FF.W.0040.000000T0000Z-120802T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
715 PM MDT WED AUG 1 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM MDT FOR WEST
CENTRAL KANE AND EAST CENTRAL WASHINGTON COUNTIES...
AT 707 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE FLASH FLOODING OVER AND ADJACENT TO EASTERN PORTIONS OF
ZION NATIONAL PARK. RAINFALL FROM EARLIER THUNDERSTORMS WILL
CONTINUE TO CHANNEL THROUGH NARROW SLOT CANYONS AND INTO LARGER
RIVER STEMS THROUGH 915 PM MDT.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ZION NATIONAL
PARK
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3729 11298 3735 11292 3734 11284 3733 11281
3732 11280 3723 11280 3721 11281 3715 11284
3715 11297 3716 11306 3717 11308
$$
MERRILL814
WGUS75 KSLC 020314
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
914 PM MDT WED AUG 1 2012
UTC025-053-020321-
/O.EXP.KSLC.FF.W.0040.000000T0000Z-120802T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
914 PM MDT WED AUG 1 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 915 PM MDT FOR WEST CENTRAL
KANE AND EAST CENTRAL WASHINGTON COUNTIES...
PRECIPITATION HAS TAPERED OFF OVER THE EASTERN PORTIONS OF ZION
NATIONAL PARK. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN ALLOWED
TO EXPIRE. ALTHOUGH WATER LEVELS MAY REMAIN HIGH IN SOME AREAS IN
THE EASTERN PORTIONS OF ZION NATIONAL PARK...THEY WILL GRADUALLY
RECEDE THROUGH THE REST OF THIS EVENING. MONITOR NOAA WEATHER RADIO
OR LOCAL TELEVISION OR RADIO FOR THE LATEST WEATHER INFORMATION.
LAT...LON 3729 11298 3735 11292 3734 11284 3733 11281
3732 11280 3723 11280 3721 11281 3715 11284
3715 11297 3716 11306 3717 11308
$$
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, 2:51 PM MDT | Flash Flood Warning | SLC | Garfield | 4 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, 5:27 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.