Alert archive / Utah / Flash Flood Warnings in 2011
Flash Flood Warning 14, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 26, 2011, 4:05 PM MDT for Salt Lake 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 26, 2011, 4:05 PM MDT (22:05 UTC)
- Expired
- Jul 26, 2011, 7:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Salt Lake County, UT
The radar
The Salt Lake City radar (KMTX), 79 km from the middle of the area, began a volume at 22:08 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 26, 4:18 PM MDT | FLASH FLOOD | Kearns, UT | WATER MAKING ROADS IMPASSABLE AT INTERSECTIONS OF 4000 W/5400 S AND BANGERTER HIGHWAY/5400 S. WATER IS UP TO THE BOTTOMS OF CAR DOORS ON AT LEAST ONE INTERSECTIONS. |
| Jul 26, 4:18 PM MDT | FLASH FLOOD | Taylorsville, UT | AT LEAST HALF A DOZEN HOMES HAVE FLOODED BASEMENTS NEAR THE INTERSECTION OF 5400 S AND 3200 W. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 10.1 hours before the alert went out and 15 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
- 139 J/kg
- Mixed-layer CIN
- -206 J/kg
- Mixed-layer LCL
- 1809 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 179 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
511 WGUS55 KSLC 262205 FFWSLC UTC035-270100- /O.NEW.KSLC.FF.W.0014.110726T2205Z-110727T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 405 PM MDT TUE JUL 26 2011 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL SALT LAKE COUNTY IN UTAH... THIS INCLUDES THE CITIES OF...WEST VALLEY CITY...MURRAY... * UNTIL 700 PM MDT * AT 356 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING EXTREMELY HEAVY RAINFALL ACROSS CENTRAL SALT LAKE COUNTY. THESE THUNDERSTORMS WILL PRODUCE RAINFALL RATES OF UP TO TWO INCHES AN HOUR. THIS HEAVY RAIN WILL RESULT IN FLOODING OF ROADWAYS...LOW SPOTS....AND POOR DRAINAGE AREAS. WATER IS ALREADY FILLING SOME INTERSECTIONS IN KEARNS AND MAKING SOME ROADS IMPASSABLE. WATER IS AS HIGH AS CAR DOORS IN AT LEAST ONE INTERSECTION. THIS IS A DANGEROUS SITUATION! DO NOT DRIVE THROUGH FLOODED INTERSECTIONS! * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO KEARNS...WEST JORDAN...TAYLORSVILLE...AND MURRAY 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. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. && LAT...LON 4066 11212 4080 11176 4061 11172 4055 11209 $$ RG
3 follow-up statements
698 WGUS75 KSLC 262242 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 442 PM MDT TUE JUL 26 2011 UTC035-270100- /O.CON.KSLC.FF.W.0014.000000T0000Z-110727T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SALT LAKE UT- 442 PM MDT TUE JUL 26 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM MDT FOR CENTRAL SALT LAKE COUNTY... AT 436 PM MDT...THE THUNDERSTORMS THAT PRODUCED EXTREMELY HEAVY RAINFALL OVER PORTIONS OF CENTRAL SALT LAKE COUNTY HAVE MOVED EAST OF THE AREA. HOWEVER...RAPID RUNOFF OVER THE URBAN AREA CONTINUES. THIS HAS RESULTED IN FLOODED INTERSECTIONS...INCLUDING SEVERAL ON BANGERTER HIGHWAY...DISPLACED MANHOLE COVERS...AND FLOODED BASEMENTS. THIS RAPID RUNOFF WILL ALSO RESULT IN RAPID RISES ON AREAS CREEKS AND STREAMS. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO... KEARNS...WEST JORDAN...TAYLORSVILLE...AND MURRAY PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE THROUGH FLOWING WATER. NEARLY HALF OF ALL FLOOD FATALITIES ARE VEHICLE RELATED. AS LITTLE AS 6 INCHES OF WATER MAY CAUSE YOU TO LOSE CONTROL OF YOUR VEHICLE. TWO FEET OF RUSHING WATER CAN CARRY AWAY MOST VEHICLES INCLUDING SUV'S AND PICKUPS. && LAT...LON 4066 11212 4080 11176 4061 11172 4055 11209 $$ RG
861 WGUS75 KSLC 270028 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 628 PM MDT TUE JUL 26 2011 UTC035-270100- /O.CON.KSLC.FF.W.0014.000000T0000Z-110727T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SALT LAKE UT- 628 PM MDT TUE JUL 26 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM MDT FOR CENTRAL SALT LAKE COUNTY... AT 620 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT ADDITIONAL THUNDERSTORMS WERE MOVING THROUGH CENTRAL SALT LAKE COUNTY. THESE STORMS ARE MOVING OVER SOME OF THE SAME AREAS THAT RECEIVED EXTREMELY HEAVY RAIN EARLIER THIS AFTERNOON. WHILE NOT AS STRONG AS THE EARLIER STORMS...RAINFALL RATES OF AN INCH AN HOUR WILL BE POSSIBLE. THIS ADDITIONAL RAINFALL WILL ADD ADDITIONAL RUNOFF TO IMPACTED AREAS IN KEARNS...WEST VALLEY CITY AND MURRAY. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO KEARNS...WEST VALLEY CITY...TAYLORSVILLE...AND MURRAY PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE THROUGH FLOWING WATER. NEARLY HALF OF ALL FLOOD FATALITIES ARE VEHICLE RELATED. AS LITTLE AS 6 INCHES OF WATER MAY CAUSE YOU TO LOSE CONTROL OF YOUR VEHICLE. TWO FEET OF RUSHING WATER CAN CARRY AWAY MOST VEHICLES INCLUDING SUV'S AND PICKUPS. && LAT...LON 4066 11212 4080 11176 4061 11172 4055 11209 $$ RG
699 WGUS75 KSLC 270108 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 708 PM MDT TUE JUL 26 2011 UTC035-270112- /O.EXP.KSLC.FF.W.0014.000000T0000Z-110727T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SALT LAKE UT- 708 PM MDT TUE JUL 26 2011 ...THE FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL SALT LAKE COUNTY... RUNOFF FROM EARLIER PRECIPITATION HAS DIMINISHED AND PONDING IN LOW SPOTS...DRAINAGE DITCHES...AND ON AREA ROADWAYS HAS BEEN GREATLY REDUCED. CREEK AND STREAM LEVELS ARE ALSO LOWERING QUICKLY. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. KEEP IN MIND THAT THERE WILL STILL BE SOME PONDING ON AREA ROADS AND DRIVERS SHOULD USE EXTRA CAUTION IN THE KEARNS...MURRAY AND TAYLORSVILLE AREAS. MONITOR NOAA WEATHER RADIO OR LOCAL TELEVISION OR RADIO FOR THE LATEST WEATHER INFORMATION. LAT...LON 4066 11212 4080 11176 4061 11172 4055 11209 $$ RG
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 6:54 PM MDT | Flash Flood Warning | SLC | Washington | 6 hr |
| Jul 26, 3:36 AM MDT | Flash Flood Watch | SLC | 18 hr | |
| Jul 26, 1:05 PM MDT | Areal Flood Advisory | SLC | Washington | 115 min |
| Jul 26, 2:34 PM MDT | Areal Flood Advisory | SLC | Kane | 3 hr |
| Jul 26, 2:50 PM MDT | Flash Flood Warning | SLC | Kane | 5 hr |
| Jul 26, 3:26 PM MDT | Severe Thunderstorm Warning | SLC | Salt Lake, Utah | 31 min |
| Jul 26, 3:37 PM MDT | Areal Flood Advisory | SLC | Salt Lake | 3 hr |
| Jul 26, 4:40 PM MDT | Areal Flood Advisory | SLC | Salt Lake, Utah | 110 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.