Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 59, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 23, 2012, 2:52 PM MDT for Kane County, San Juan County, Utah. It was in force for 6 hr. 2 reports 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 23, 2012, 2:52 PM MDT (20:52 UTC)
- Expired
- Aug 23, 2012, 8:45 PM MDT
- In force
- 6 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Kane County, UT, San Juan County, UT
The radar
The Cedar City radar (KICX), 100 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 23, 5:48 PM MDT | FLASH FLOOD | 24 Wnw Big Water, UT | LARGE FLASH FLOOD IN THE BUCKSKIN GULCH AREA NEAR SR89. |
| Aug 23, 5:48 PM MDT | FLASH FLOOD | 2 W Big Water, UT | MAJOR FLASH FLOODING IN COYOTE CREEK, TRIBUTARY OF WAWHEAP DRAINAGE NEAR BIGWATER. LARGE TREES AND DEBRIS ON FRONT OF WAVE. |
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 224 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
- 1056 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- -12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
238
WGUS55 KSLC 232052
FFWSLC
UTC025-037-240245-
/O.NEW.KSLC.FF.W.0059.120823T2052Z-120824T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
252 PM MDT THU AUG 23 2012
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL KANE COUNTY IN UTAH
SOUTHWESTERN SAN JUAN COUNTY IN SOUTHEAST UTAH
* UNTIL 845 PM MDT
* AT 236 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN FROM A LINE OF THUNDERSTORMS ACROSS MULTIPLE DRAINAGES
IN NORTHERN KANE COUNTY. THE FLASH FLOOD WARNING COVERS THE
BUCKSKIN...PARIA...WAHWEAP...WARM CREEK...AND LAST CHANCE
DRAINAGES.
* RAINFALL AMOUNTS OF 1 TO 1.25 INCHES HAS FALLEN OVER THE HEADWATER
REGIONS OF THESE DRAINAGES. IT IS INFERRED THAT WITH THIS
WIDESPREAD AMOUNT OF RAINFALL FALLING...FLASH FLOODING IS
ANTICIPATED THROUGH THE EVENING HOURS.
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 3721 11222 3732 11232 3743 11232 3753 11206
3753 11176 3751 11157 3737 11139 3701 11117
3702 11127 3701 11156 3701 11172 3700 11203
$$
MCINERNEY2 follow-up statements
926
WGUS75 KSLC 240125
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
725 PM MDT THU AUG 23 2012
UTC025-037-240245-
/O.CON.KSLC.FF.W.0059.000000T0000Z-120824T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN JUAN UT-KANE UT-
725 PM MDT THU AUG 23 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MDT FOR
CENTRAL KANE AND SOUTHWESTERN SAN JUAN COUNTIES...
TRAINED WEATHER SPOTTERS REPORTED FLASH FLOODING WAS OCCURRING IN
THE WAHWEAP CREEK AND COYOTE CREEK DRAINAGES IN EASTERN KANE COUNTY
AS WELL AS IN THE BUCKSKIN GULCH IN CENTRAL KANE COUNTY.
HEAVY RAINFALL HAS PRETTY MUCH ENDED IN THE WARNED AREA BUT FLOOD
FLOWS ARE EXPECTED TO PERSIST ON THE MAIN WASHES FOR SEVERAL MORE
HOURS. IN ADDITION...FLOOD FLOWS ARE LIKELY MOVING DOWN THE PARIA
RIVER DRAINAGE IN CENTRAL KANE COUNTY AND WILL PERSIST FOR SEVERAL
MORE HOURS AS WELL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. TURN AROUND AND DONT DROWN. MOVE TO HIGHER GROUND.
&&
LAT...LON 3721 11222 3732 11232 3743 11232 3753 11206
3753 11176 3751 11157 3737 11139 3701 11117
3702 11127 3701 11156 3701 11172 3700 11203
$$
PW436
WGUS75 KSLC 240241
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
841 PM MDT THU AUG 23 2012
UTC025-037-240248-
/O.EXP.KSLC.FF.W.0059.000000T0000Z-120824T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN JUAN UT-KANE UT-
841 PM MDT THU AUG 23 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 845 PM MDT FOR CENTRAL KANE
AND SOUTHWESTERN SAN JUAN COUNTIES...
FLOOD FLOWS ALONG THE MAIN WASHES IN KANE COUNTY WILL GRADUALLY
DECLINE OVER THE NEXT SEVERAL HOURS AND ADDITIONAL HEAVY RAIN IS NOT
EXPECTED. THEREFORE... THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO
EXPIRE. 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 3721 11222 3732 11232 3743 11232 3753 11206
3753 11176 3751 11157 3737 11139 3701 11117
3702 11127 3701 11156 3701 11172 3700 11203
$$
PWThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 11:59 AM MDT | Flash Flood Warning | SLC | Sevier, Wayne | 3 hr |
| Aug 23, 12:45 PM MDT | Flash Flood Warning | SLC | Garfield, Wayne | 3 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.