Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 2, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 7, 2012, 12:12 PM MDT for Carbon County, Emery County, Utah. It was in force for 108 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 7, 2012, 12:12 PM MDT (18:12 UTC)
- Expired
- Jul 7, 2012, 2:00 PM MDT
- In force
- 108 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Carbon County, UT, Emery County, UT
The radar
The Salt Lake City radar (KMTX), 216 km from the middle of the area, began a volume at 18:14 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
Salt Lake City I, UT (KSLC), launched 12:00Z, 6.2 hours before the alert went out and 147 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
- 88 J/kg
- Mixed-layer CIN
- -221 J/kg
- Mixed-layer LCL
- 2165 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
334
WGUS55 KSLC 071812
FFWSLC
UTC007-015-072000-
/O.NEW.KSLC.FF.W.0002.120707T1812Z-120707T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1212 PM MDT SAT JUL 7 2012
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN CARBON COUNTY IN UTAH
NORTHWESTERN EMERY COUNTY IN UTAH
* UNTIL 200 PM MDT
* AT 1205 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CLEAR
CREEK...GORDON CREEK...HUGHES CANYON AND HUNTINGTON CREEK.
THIS WARNING IS FOR THE SEELEY FIRE BURN SCAR. DEBRIS FLOWS ARE
LIKELY WITH THE AMOUNT OF RAIN THAT HAS ALREADY FALLEN AND SOME
ADDITIONAL HEAVY RAIN IS EXPECTED. DEBRIS FROM HUGHES CANYON MAY
CROSS STATE HIGHWAY 31.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF A DEBRIS FLOW HAS OCCURRED IT IS IMPORTANT REALIZE THAT THE RUNOUT
AREA REMAINS VERY DANGEROUS. ADDITIONAL DEBRIS FLOWS MAY OCCUR WITHIN
MINUTES OF THE ORIGINAL FLOW. PLEASE REMAIN VIGILANT AND BE PREPARED
TO TAKE SWIFT ACTION.
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 3967 11121 3970 11105 3959 11100 3949 11101
3949 11121
$$
PW2 follow-up statements
199
WGUS75 KSLC 071905
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
105 PM MDT SAT JUL 7 2012
UTC007-015-072000-
/O.CON.KSLC.FF.W.0002.000000T0000Z-120707T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARBON UT-EMERY UT-
105 PM MDT SAT JUL 7 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 PM MDT FOR
NORTHWESTERN EMERY AND SOUTHWESTERN CARBON COUNTIES...
AT 1257 PM MDT...THUNDERSTORMS PRODUCING HEAVY RAIN OVER THE SEELEY
FIRE BURN SCAR ARE WEAKENING BUT A COUPLE OF DEBRIS FLOWS AND FLASH
FLOODS HAVE BEEN REPORTED FROM THE RAIN EARLIER. ONE CROSSED STATE
HIGHWAY 31 AT ENGINEER CANYON AND CLOSED THAT ROAD. ANOTHER HAS MADE
THE ROAD IN MUD WATER CANYON IMPASSABLE.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CLEAR
CREEK...HUNTINGTON CANYON...STATE HIGHWAY 31 AND GORDON CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF A DEBRIS FLOW HAS OCCURRED IT IS IMPORTANT REALIZE THAT THE RUNOUT
AREA REMAINS VERY DANGEROUS. ADDITIONAL DEBRIS FLOWS MAY OCCUR WITHIN
MINUTES OF THE ORIGINAL FLOW. PLEASE REMAIN VIGILANT AND BE PREPARED
TO TAKE SWIFT ACTION.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3967 11121 3970 11105 3959 11100 3949 11101
3949 11121
$$
PW162
WGUS75 KSLC 071955
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
155 PM MDT SAT JUL 7 2012
UTC007-015-072002-
/O.EXP.KSLC.FF.W.0002.000000T0000Z-120707T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARBON UT-EMERY UT-
155 PM MDT SAT JUL 7 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 200 PM MDT FOR NORTHWESTERN
EMERY AND SOUTHWESTERN CARBON COUNTIES...
RAIN OVER THE SEELEY FIRE BURN SCAR IS ENDING AND THE THREAT OF
ADDITIONAL DEBRIS FLOWS AND FLASH FLOODING HAS DIMINISHED GREATLY.
THEREFORE...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE.
MONITOR NOAA WEATHER RADIO OR LOCAL TELEVISION OR RADIO FOR THE
LATEST WEATHER INFORMATION.
IF A DEBRIS FLOW HAS OCCURRED IT IS IMPORTANT REALIZE THAT THE RUNOUT
AREA REMAINS VERY DANGEROUS. ADDITIONAL DEBRIS FLOWS MAY OCCUR WITHIN
MINUTES OF THE ORIGINAL FLOW. PLEASE REMAIN VIGILANT AND BE PREPARED
TO TAKE SWIFT ACTION.
LAT...LON 3967 11121 3970 11105 3959 11100 3949 11101
3949 11121
$$
PWNearby
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.