Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 7, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 15, 2012, 2:57 PM MDT for Juab County, Sanpete County, Utah County, Utah. It was in force for 3 hr. 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 15, 2012, 2:57 PM MDT (20:57 UTC)
- Expired
- Jul 15, 2012, 6:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Juab County, UT, Sanpete County, UT, Utah County, UT
The radar
The Salt Lake City radar (KMTX), 190 km from the middle of the area, began a volume at 20:59 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, 9.0 hours before the alert went out and 124 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
- 114 J/kg
- Mixed-layer CIN
- -155 J/kg
- Mixed-layer LCL
- 1587 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
450
WGUS55 KSLC 152057
FFWSLC
UTC023-039-049-160000-
/O.NEW.KSLC.FF.W.0007.120715T2057Z-120716T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
257 PM MDT SUN JUL 15 2012
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL JUAB COUNTY IN UTAH
NORTH CENTRAL SANPETE COUNTY IN UTAH
SOUTH CENTRAL UTAH COUNTY IN UTAH
* UNTIL 600 PM MDT
* AT 249 PM MDT...DOPPLER RADAR INDICATED THAT HEAVY RAINFALL HAS
BEEN FALLING OVER THE WOOD HOLLOW BURN SCAR...WHICH IS LOCATED JUST
WEST OF HIGHWAY 89 BETWEEN BIRDSEYE AND MOUNT PLEASANT. RADAR
ESTIMATES INDICATE THAT UP TO 0.75 INCHES OF PRECIPITATION WILL
OCCUR OVER THE BURN SCAR OVER THE NEXT 30 MINUTES.
IT IS EXPECTED THAT THIS AMOUNT OF RAINFALL MAY RESULT IN A DEBRIS
FLOW AREAS NEAR THE BURN SCAR. PEOPLE LIVING IN AREAS ADJACENT TO
THE BURN SCAR SHOULD TAKE ACTION TO PROVIDE FOR THEIR SAFETY.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO INDIANOLA
AND ROUTE 89 FROM SOUTH OF BIRDSEYE THROUGH FAIRVIEW.
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 3963 11166 3986 11157 3987 11149 3961 11141
3956 11149
$$
KRUSE2 follow-up statements
369
WGUS75 KSLC 152134
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
334 PM MDT SUN JUL 15 2012
UTC023-039-049-160000-
/O.CON.KSLC.FF.W.0007.000000T0000Z-120716T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JUAB UT-SANPETE UT-UTAH UT-
334 PM MDT SUN JUL 15 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM MDT FOR SOUTH
CENTRAL UTAH...NORTH CENTRAL SANPETE AND EAST CENTRAL JUAB
COUNTIES...
AT 328 PM MDT...HEAVY RAINFALL HAS ENDED FOR THE TIME BEING ACROSS
THE WOODHOLLOW FIRE BURN SCAR. RADAR ESTIMATES OF UP TO 0.50 INCHES
OF PRECIPITATION HAVE OCCURRED OVER THE BURN SCAR. DEBRIS FLOWS ARE
LIKELY IN AREAS NEAR THIS BURN SCAR INCLUDING ROUTE 89 FROM BIRDSEYE
TO FAIRVIEW. THE HIGHEST THREAT AREA IS FROM 5 MILES SOUTH OF
INDIANOLA NORTH TO NEAR BIRDSEYE.
ADDITIONAL THUNDERSTORM DEVELOPMENT IS POSSIBLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF A DEBRIS FLOW HAS OCCURRED IT IS IMPORTANT REALIZE THAT THE RUNOUT
AREA REMAINS VERY DANGEROUS. ADDITIONAL DEBRIS FLOWS MAY OCCUR WITHIN
MINUTES OF THE ORIGINAL FLOW. PLEASE REMAIN VIGILANT AND BE PREPARED
TO TAKE SWIFT ACTION.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3963 11166 3986 11157 3987 11149 3961 11141
3956 11149
$$
KRUSE474
WGUS75 KSLC 152359
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
559 PM MDT SUN JUL 15 2012
UTC023-039-049-160006-
/O.EXP.KSLC.FF.W.0007.000000T0000Z-120716T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JUAB UT-SANPETE UT-UTAH UT-
559 PM MDT SUN JUL 15 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 600 PM MDT FOR SOUTH
CENTRAL UTAH...NORTH CENTRAL SANPETE AND EAST CENTRAL JUAB
COUNTIES...
PRECIPITATION HAS ENDED OVER THE WOOD HOLLOW BURN SCAR AND THE
THREAT OF DEBRIS FLOW HAS DIMINISHED. THEREFORE...THE FLASH FLOOD
WARNING HAS BEEN ALLOWED TO EXPIRE.
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 3963 11166 3986 11157 3987 11149 3961 11141
3956 11149
$$
LCThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 4:53 PM MDT | Areal Flood Advisory | SLC | Washington | 3 hr |
| Jul 15, 5:10 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 35 min |
| Jul 15, 5:24 PM MDT | Flash Flood Warning | SLC | Washington | 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.