Alert archive / Utah / Flash Flood Warnings in 2011
Flash Flood Warning 16, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 27, 2011, 4:52 PM MDT for Garfield County, Wayne County, Utah. It was in force for 3 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
- Jul 27, 2011, 4:52 PM MDT (22:52 UTC)
- Expired
- Jul 27, 2011, 7:45 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Garfield County, UT, Wayne County, UT
The radar
The Grand Junction radar (KGJX), 205 km from the middle of the area, began a volume at 22:55 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 |
|---|---|---|---|
| Jul 27, 5:02 PM MDT | FLASH FLOOD | 20 Se Hanksville, UT | ADDITIONAL FLASH FLOODING FROM HENRY MOUNTAINS DAMAGING MULTIPLE ROADWAYS IN THE AREA. |
| Jul 27, 5:09 PM MDT | FLASH FLOOD | 17 Sse Hanksville, UT | FLASH FLOOD ON POISON SPRING WASH. WATER RAN OVER HIGHWAY 95 WHICH MADE IT BRIEFLY IMPASSABLE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Grand Junction, CO (KGJT), launched 12:00Z, 10.9 hours before the alert went out and 189 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
- 1072 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
175
WGUS55 KSLC 272252
FFWSLC
UTC017-055-280145-
/O.NEW.KSLC.FF.W.0016.110727T2252Z-110728T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
452 PM MDT WED JUL 27 2011
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN GARFIELD COUNTY IN UTAH...
SOUTHEASTERN WAYNE COUNTY IN UTAH...
* UNTIL 745 PM MDT
* AT 444 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS CAPABLE OF PRODUCING FLASH FLOODING FROM A
THUNDERSTORM OVER THE WARNED AREA.
* FLASH FLOODING HAS BEEN REPORTED OVER IN WASH NEAR HOG SPRINGS.
ADDITIONAL FLASH FLOODING IS ALSO POSSIBLE WITH STORMS MOVING
ACROSS THE NORTHERN PORTIONS OF THE GLEN CANYON NATIONAL
RECREATION AREA IN EASTERN WAYNE COUNTY.
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 3812 10996 3808 11005 3800 11009 3801 11013
3795 11018 3788 11040 3769 11050 3774 11082
3816 11065 3832 11072 3845 11002 3839 11004
3837 10998 3818 10989
$$
LC2 follow-up statements
426
WGUS75 KSLC 280028
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
628 PM MDT WED JUL 27 2011
UTC017-055-280145-
/O.CON.KSLC.FF.W.0016.000000T0000Z-110728T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GARFIELD UT-WAYNE UT-
628 PM MDT WED JUL 27 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM MDT FOR
SOUTHEASTERN WAYNE AND NORTHEASTERN GARFIELD COUNTIES...
AT 615 PM MDT...RUNOFF FROM EARLIER HEAVY RAIN WILL CONTINUE TO
PRODUCE FLASH FLOODING IN SOUTHEASTERN WAYNE AND NORTHEASTERN
GARFIELD COUNTIES...INCLUDING THE GLEN CANYON RECREATION AREA MAINLY
NORTH OF HITE MARINA.
FLASH FLOODING WAS REPORTED ALONG NORTH WASH NEAR HOG SPRINGS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3812 10996 3808 11005 3800 11009 3801 11013
3795 11018 3788 11040 3769 11050 3774 11082
3816 11065 3832 11072 3845 11002 3839 11004
3837 10998 3818 10989
$$
LC422
WGUS75 KSLC 280140
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
740 PM MDT WED JUL 27 2011
UTC017-055-280146-
/O.EXP.KSLC.FF.W.0016.000000T0000Z-110728T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GARFIELD UT-WAYNE UT-
740 PM MDT WED JUL 27 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 745 PM MDT FOR SOUTHEASTERN
WAYNE AND NORTHEASTERN GARFIELD COUNTIES...
HEAVY RAIN HAS ENDED OVER THE AREA. FLASH FLOODING FROM THE HEAVY
RAIN EARLIER WILL DECREASE THROUGH THE EVENING.
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 3812 10996 3808 11005 3800 11009 3801 11013
3795 11018 3788 11040 3769 11050 3774 11082
3816 11065 3832 11072 3845 11002 3839 11004
3837 10998 3818 10989
$$
LCThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 8:11 PM MDT | Areal Flood Advisory | SLC | Juab, Millard | 3 hr |
| Jul 27, 3:13 PM MDT | Flash Flood Warning | SLC | Garfield, Wayne | 3 hr |
| Jul 27, 4:15 PM MDT | Severe Thunderstorm Warning | SLC | Utah | 30 min |
| Jul 27, 5:45 PM MDT | Severe Thunderstorm Warning | SLC | Carbon, Duchesne | 30 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.