Alert archive / Utah / Flash Flood Warnings in 2015

Flash Flood Warning 9, NWS Salt Lake City, UT

June 3, 2015Tooele County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Jun 3, 2015, 7:30 PM MDT for Tooele 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
Jun 3, 2015, 7:30 PM MDT (01:30 UTC)
Expired
Jun 3, 2015, 10:30 PM MDT
In force
3 hr
Issued by
NWS Salt Lake City, UT
Area
Storm-based polygon
Flood severity
None

County Tooele County, UT

The radar

The Salt Lake City radar (KMTX), 106 km from the middle of the area, began a volume at 01:32 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 00:00Z, 1.5 hours before the alert went out and 80 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 00:00Z on 2015-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 36 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 00:00Z on 2015-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.1939Sfc1 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
36 J/kg
Mixed-layer CIN
-161 J/kg
Mixed-layer LCL
3107 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
80 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.

240 
WGUS55 KSLC 040130
FFWSLC
UTC045-040430-
/O.NEW.KSLC.FF.W.0009.150604T0130Z-150604T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
730 PM MDT WED JUN 3 2015

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL TOOELE COUNTY IN UTAH...

* UNTIL 1030 PM MDT
    
* AT 726 PM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN OVER THE SOUTHERN PORTIONS OF THE PATCH SPRINGS BURN 
  SCAR. RADAR ESTIMATES INDICATE THAT UP TO ONE INCH OF RAIN HAS 
  ALREADY FALLEN. EXCESSIVE RAINFALL OVER THE BURN SCAR WILL RESULT 
  IN DEBRIS FLOW MOVING OVER THE JOHNSON PASS AREA AND ALONG HIGHWAY 
  199 TOWARDS THE TOWN OF TERRA. THE DEBRIS FLOW CAN CONSIST OF 
  ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 4036 11258 4033 11258 4026 11268 4028 11269
      4032 11268 4036 11265

$$

LC
2 follow-up statements
352 
WGUS75 KSLC 040253
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
853 PM MDT WED JUN 3 2015

UTC045-040430-
/O.CON.KSLC.FF.W.0009.000000T0000Z-150604T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TOOELE UT-
853 PM MDT WED JUN 3 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM MDT FOR
EAST CENTRAL TOOELE COUNTY...

AT 851 PM MDT...DOPPLER RADAR INDICATED UP TO TWO INCHES OF RAIN 
HAVE ALREADY FALLEN OVER THE PATCH SPRINGS BURN SCAR.

EXCESSIVE RAINFALL OVER THE BURN SCAR WILL RESULT IN DEBRIS FLOW 
MOVING OVER THE JOHNSON PASS AREA AND ALONG HIGHWAY 199 TOWARDS THE 
TOWN OF TERRA. THE DEBRIS FLOW CAN CONSIST OF 
ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 4036 11258 4033 11258 4026 11268 4028 11269
      4032 11268 4036 11265

$$

LC
847 
WGUS75 KSLC 040425
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1025 PM MDT WED JUN 3 2015

UTC045-040430-
/O.EXP.KSLC.FF.W.0009.000000T0000Z-150604T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TOOELE UT-
1025 PM MDT WED JUN 3 2015

...THE FLASH FLOOD WARNING FOR EAST CENTRAL TOOELE COUNTY WILL EXPIRE
AT 1030 PM MDT...

RUNOFF FROM EARLIER PRECIPITATION OVER THE PATCH SPRINGS BURN SCAR 
HAS DIMINISHED. REPORTS INDICATE THAT A DEBRIS FLOW OCCURRED EARLIER 
THAT IMPACTED A PORTION OF HIGHWAY 199 NEAR JOHNSON PASS. 
HOWEVER...THE THREAT OF ADDITIONAL DEBRIS FLOWS HAS DIMINISHED. 
THEREFORE...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. 
MONITOR NOAA WEATHER RADIO OR LOCAL TELEVISION OR RADIO FOR THE 
LATEST WEATHER INFORMATION.

LAT...LON 4036 11258 4033 11258 4026 11268 4028 11269
      4032 11268 4036 11265

$$

LC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 3, 6:39 PM MDTSpecial Weather StatementSLCDavis, Salt Lake51 min
Jun 3, 7:11 PM MDTSevere Thunderstorm WarningSLCBox Elder34 min
Jun 3, 7:16 PM MDTSevere Thunderstorm WarningSLCBox Elder, Cache29 min
Jun 3, 7:41 PM MDTSevere Thunderstorm WarningSLCCache34 min
Jun 3, 7:43 PM MDTSevere Thunderstorm WarningSLCBox Elder32 min
Jun 3, 8:11 PM MDTSevere Thunderstorm WarningSLCBox Elder34 min
Jun 3, 8:27 PM MDTSpecial Weather StatementSLCSalt Lake48 min
Jun 3, 8:33 PM MDTSpecial Weather StatementSLCCache42 min
Jun 3, 8:38 PM MDTSevere Thunderstorm WarningSLCDavis, Salt Lake36 min
Jun 3, 8:47 PM MDTSevere Thunderstorm WarningSLCBox Elder, Cache43 min
Jun 3, 9:12 PM MDTSevere Thunderstorm WarningSLCCache, Rich33 min

Nearby

Flash Flood Warnings in Utah, 2015Every flash flood warning in 2015

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.