Alert archive / Utah / Flash Flood Warnings in 2011
Flash Flood Warning 56, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Sep 16, 2011, 3:33 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 16, 2011, 3:33 PM MDT (21:33 UTC)
- Expired
- Sep 16, 2011, 6:30 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), 41 km from the middle of the area, began a volume at 21:36 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 16, 4:43 PM MDT | FLASH FLOOD | 2 N Springdale, UT | WIDESPREAD FLASH FLOODING ACROSS MULTIPLE DRAINAGES IN ZION NP. PINE CREEK FLASHED TO 6-7 FT. SPRY CANYON FLASHED IN ADDITION TO ROCKFALL ACROSS MANY ROADS...AND FLASH FLOODING ACROSS ALL NORTHERN ASPECTS OF ZION NP. |
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, 9.6 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
- 459 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 763 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
043
WGUS55 KSLC 162133
FFWSLC
UTC025-053-170030-
/O.NEW.KSLC.FF.W.0056.110916T2133Z-110917T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
333 PM MDT FRI SEP 16 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 630 PM MDT
* AT 324 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN FROM A THUNDERSTORM OVER THE EAST AND NORTH FORKS OF THE
VIRGIN RIVER IN ZION NATIONAL PARK. ADDITIONAL SMALL SLOT CANYONS IN
THE SOUTHERN END OF THE PARK WILL ALSO BE IMPACTED.
* 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 11301 3730 11287 3721 11287 3720 11296
3716 11299 3716 11301
$$
MCINERNEY2 follow-up statements
627
WGUS75 KSLC 162224
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
424 PM MDT FRI SEP 16 2011
UTC025-053-170030-
/O.CON.KSLC.FF.W.0056.000000T0000Z-110917T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
424 PM MDT FRI SEP 16 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MDT FOR WEST
CENTRAL KANE AND EAST CENTRAL WASHINGTON COUNTIES...
AT 414 PM MDT...AREAS IN THE SOUTHERN AND SOUTHEASTERN PARTS OF ZION
NATIONAL PARK ARE EXPERIENCING WIDESPREAD FLASH FLOODING. MANY SLOT
CANYONS AND SMALL TRIBUTARIES INCLUDING THE EAST FORK OF THE VIRGIN
RIVER ARE EXPERIENCING FLASH FLOODING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE TRAVELING ALONG SR9 MOVING WEST INTO ZION NATIONAL
PARK...PLEASE USE CAUTION WHEN VENTURING INTO THIS AREA.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3729 11301 3730 11287 3721 11287 3720 11296
3716 11299 3716 11301
$$
MCINERNEY345
WGUS75 KSLC 170025
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
625 PM MDT FRI SEP 16 2011
UTC025-053-170034-
/O.EXP.KSLC.FF.W.0056.000000T0000Z-110917T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-KANE UT-
625 PM MDT FRI SEP 16 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 630 PM MDT FOR WEST CENTRAL
KANE AND EAST CENTRAL WASHINGTON COUNTIES...
THUNDERSTORMS THAT RESULTED IN HEAVY RAIN OVER ZION NATIONAL PARK
HAVE MOVED EAST OF THE AREA. THE RUNOFF FROM THESE THUNDERSTORMS
RESULTED IN SIGNIFICANT FLASH FLOODING IN SOUTHERN PORTIONS OF THE
PARK THIS AFTERNOON. FLOODING HAS DIMINISHED ACROSS THE
AREA...THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE.
HOWEVER...FLOWS WILL REMAIN HIGH ON AREA STREAMS AND RUNOFF WILL
CONTINUE THROUGH AFFECTED SLOT CANYONS THROUGH THE EVENING.
LAT...LON 3729 11301 3730 11287 3721 11287 3720 11296
3716 11299 3716 11301
$$The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 16, 3:08 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
| Sep 16, 3:13 PM MDT | Severe Thunderstorm Warning | SLC | Garfield, Wayne | 62 min |
| Sep 16, 3:44 PM MDT | Severe Thunderstorm Warning | SLC | Emery, Wayne | 33 min |
| Sep 16, 3:53 PM MDT | Flash Flood Warning | SLC | Kane | 4 hr |
| Sep 16, 3:54 PM MDT | Flash Flood Warning | SLC | Emery | 3 hr |
| Sep 16, 4:21 PM MDT | Severe Thunderstorm Warning | SLC | Wayne | 38 min |
| Sep 16, 4:39 PM MDT | Severe Thunderstorm Warning | SLC | Garfield | 50 min |
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.