Alert archive / Utah / Flash Flood Warnings in 2011

Flash Flood Warning 10, NWS Salt Lake City, UT

July 19, 2011Carbon County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Jul 19, 2011, 1:46 PM MDT for Carbon 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 19, 2011, 1:46 PM MDT (19:46 UTC)
Expired
Jul 19, 2011, 4:45 PM MDT
In force
3 hr
Issued by
NWS Salt Lake City, UT
Area
Storm-based polygon
Flood severity
None

County Carbon County, UT

The radar

The Salt Lake City radar (KMTX), 218 km from the middle of the area, began a volume at 19:49 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, 7.8 hours before the alert went out and 148 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.

Skew-T log-pSkew-T log-p diagram, Salt Lake City I, UT at 12:00Z on 2011-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 12:00Z on 2011-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 215 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
10 J/kg
Mixed-layer CIN
-221 J/kg
Mixed-layer LCL
2686 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
215 m²/s²
0-3 km storm-relative helicity
195 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

982 
WGUS55 KSLC 191946
FFWSLC
UTC007-192245-
/O.NEW.KSLC.FF.W.0010.110719T1946Z-110719T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
146 PM MDT TUE JUL 19 2011

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WEST CENTRAL CARBON COUNTY IN UTAH...

* UNTIL 445 PM MDT

* AT 141 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  VERY HEAVY RAINFALL ACROSS GORDON CREEK AND OTHER TRIBUTARIES IN 
  THE WASATCH PLATEAU WEST OF PRICE. RAINFALL TOTALS OF 3 TO 4 
  INCHES HAVE ALREADY FALLEN...WITH ADDITIONAL THUNDERSTORMS 
  EXPECTED TO CONTINUE MOVING THROUGH THE AREA THROUGH MID 
  AFTERNOON.  

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GORDON 
  CREEK AND GARLEY CANYON WEST OF THE CITY OF PRICE. 

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 3976 11089 3961 11083 3954 11105 3963 11112

$$

SEAMAN
2 follow-up statements
960 
WGUS75 KSLC 192035
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
235 PM MDT TUE JUL 19 2011

UTC007-192245-
/O.CON.KSLC.FF.W.0010.000000T0000Z-110719T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARBON UT-
235 PM MDT TUE JUL 19 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM MDT FOR WEST
CENTRAL CARBON COUNTY...

AT 220 PM MDT...A STORM SPOTTER REPORTED WATER FLOWING ACROSS ROADS 
AND INTO YARDS 5 MILES WEST OF PRICE ALONG GORDON CREEK. NATIONAL 
WEATHER SERVICE DOPPLER RADAR ESTIMATES 3 TO 4 INCHES OF RAIN FELL 
ACROSS THIS AREA SINCE NOON.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GORDON   
CREEK AND GARLEY CANYON WEST OF THE CITY OF PRICE. 

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 3976 11089 3961 11083 3954 11105 3963 11112

$$

SEAMAN
558 
WGUS75 KSLC 192240
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
440 PM MDT TUE JUL 19 2011

UTC007-192250-
/O.EXP.KSLC.FF.W.0010.000000T0000Z-110719T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CARBON UT-
440 PM MDT TUE JUL 19 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 445 PM MDT FOR WEST CENTRAL
CARBON COUNTY...

RUNOFF FROM EARLIER PRECIPITATION HAS DIMINISHED GREATLY AND RIVER 
AND STREAM LEVELS HAVE LIKELY DECREASED. THEREFORE...THE FLASH FLOOD 
WARNING WILL BE ALLOWED TO EXPIRE. MONITOR NOAA WEATHER RADIO OR 
LOCAL TELEVISION OR RADIO FOR THE LATEST WEATHER INFORMATION.

LAT...LON 3976 11089 3961 11083 3954 11105 3963 11112

$$

SEAMAN

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 18, 6:27 PM MDTSpecial Weather StatementSLCKane48 min
Jul 19, 2:27 AM MDTRed Flag WarningSLC20 hr
Jul 19, 2:45 AM MDTWind AdvisorySLC18 hr
Jul 19, 12:33 PM MDTFlash Flood WarningSLCWayne3 hr
Jul 19, 3:17 PM MDTSpecial Weather StatementSLCSalt Lake43 min
Jul 19, 3:31 PM MDTAreal Flood AdvisorySLCSalt Lake59 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.