Alert archive / Utah / Flash Flood Warnings in 2011
Flash Flood Warning 52, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Sep 14, 2011, 2:40 PM MDT for Kane County, Washington County, Utah. It was in force for 3 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
- Sep 14, 2011, 2:40 PM MDT (20:40 UTC)
- Expired
- Sep 14, 2011, 5:45 PM MDT
- In force
- 3 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), 43 km from the middle of the area, began a volume at 20:40 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 |
|---|---|---|---|
| Sep 14, 3:35 PM MDT | FLASH FLOOD | 4 E Zion Np, UT | PARK RANGERS REPORTED FLASH FLOODING ALONG PINE CREEK 7 TO 8 FEET DEEP...AND ALONG THE EAST FORK OF THE VIRGIN RIVER 3 TO 4 FEET DEEP. ADDITIONALLY NUMEROUS WATERFALLS HAVE FORMED THROUGHOUT ZION CANYON. |
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, 8.7 hours before the alert went out and 243 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
- 224 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 729 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
797
WGUS55 KSLC 142040
FFWSLC
UTC025-053-142345-
/O.NEW.KSLC.FF.W.0052.110914T2040Z-110914T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
240 PM MDT WED SEP 14 2011
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 545 PM MDT
* AT 500 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS CAPABLE OF PRODUCING VERY HEAVY RAIN OVER THE WARNED
AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ZION
NATIONAL PARK AND STATE ROUTE 9.
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 3725 11306 3733 11291 3724 11283 3727 11276
3723 11269 3717 11276 3712 11287 3710 11300
3712 11308 3721 11312 3723 11311
$$
ROGOWSKI2 follow-up statements
742
WGUS75 KSLC 142147
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
347 PM MDT WED SEP 14 2011
UTC025-053-142345-
/O.CON.KSLC.FF.W.0052.000000T0000Z-110914T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
347 PM MDT WED SEP 14 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM MDT FOR WEST
CENTRAL KANE AND EAST CENTRAL WASHINGTON COUNTIES...
AT 335 PM MDT...PARK RANGERS REPORTED FLASH FLOODING ALONG PINE
CREEK 7 TO 8 FEET DEEP...AND ALONG THE EAST FORK OF THE VIRGIN
RIVER 3 TO 4 FEET DEEP. ADDITIONALLY NUMEROUS WATERFALLS
HAVE FORMED THROUGHOUT ZION CANYON.
THE THUNDERSTORMS WHICH CAUSED THE FLASH FLOODING HAVE MOVED TO THE
NORTH...BUT PERIODS OF RAINFALL AND THE FLASH FLOOD THREAT WILL
CONTINUE INTO THE EARLY EVENING HOURS.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ZION NATIONAL
PARK AND STATE ROUTE 9.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 3725 11306 3733 11291 3724 11283 3727 11276
3723 11269 3717 11276 3712 11287 3710 11300
3712 11308 3721 11312 3723 11311
$$
ROGOWSKI442
WGUS75 KSLC 142343
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
543 PM MDT WED SEP 14 2011
UTC025-053-142348-
/O.EXP.KSLC.FF.W.0052.000000T0000Z-110914T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
543 PM MDT WED SEP 14 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 545 PM MDT FOR WEST CENTRAL
KANE AND EAST CENTRAL WASHINGTON COUNTIES...
THE FLASH FLOOD WARNING WHICH WAS IN EFFECT FOR WEST CENTRAL KANE
AND EAST CENTRAL WASHINGTON COUNTIES INCLUDING ZION NATIONAL PARK
WILL BE ALLOWED TO EXPIRE AT 545 PM. FLASH FLOODING FROM EARLIER
THUNDERSTORMS HAS WORKED ITS WAY INTO THE MAIN STEM OF THE VIRGIN
RIVER.
LAT...LON 3725 11306 3733 11291 3724 11283 3727 11276
3723 11269 3717 11276 3712 11287 3710 11300
3712 11308 3721 11312 3723 11311
$$
ROGOWSKIThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 2:23 PM MDT | Flash Flood Warning | SLC | Washington | 6 hr |
| Sep 14, 3:30 PM MDT | Flash Flood Warning | SLC | Kane | 4 hr |
| Sep 14, 3:32 PM MDT | Special Weather Statement | SLC | 43 min | |
| Sep 14, 5:09 PM MDT | Flash Flood Warning | SLC | Kane | 3 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.