Alert archive / Utah / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 21, NWS Grand Junction, CO

June 10, 2015San Juan County, Utah

NWS Grand Junction, CO issued this severe thunderstorm warning at Jun 10, 2015, 11:12 PM MDT for San Juan County, Utah. It was in force for 33 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
Jun 10, 2015, 11:12 PM MDT (05:12 UTC)
Expired
Jun 10, 2015, 11:45 PM MDT
In force
33 min
Issued by
NWS Grand Junction, CO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County San Juan County, UT

The radar

The Cedar City radar (KICX), 206 km from the middle of the area, began a volume at 05:14 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

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 5.2 hours before the alert went out and 259 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, Flgstf/Belemont, AZ at 00:00Z on 2015-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 234 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 00:00Z on 2015-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 square meters per square second.19395878Sfc1 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
234 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1012 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

996 
WUUS55 KGJT 110512 RRA
SVRGJT
UTC037-110545-
/O.NEW.KGJT.SV.W.0021.150611T0512Z-150611T0545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1112 PM MDT WED JUN 10 2015

THE NATIONAL WEATHER SERVICE IN GRAND JUNCTION  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN SAN JUAN COUNTY IN SOUTHEASTERN UTAH...

* UNTIL 1145 PM MDT

* AT 1110 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED 8 MILES
  SOUTHEAST OF HALLS CROSSING...OR 41 MILES WEST OF MEXICAN HAT...
  MOVING EAST AT 25 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. AT 1045 PM MDT 60 MPH WINDS WERE         
           REPORTED 1 MILE NORTH NORTHWEST OF BULLFROG. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING AND TREES. 

* THIS SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
  SOUTHWESTERN SAN JUAN COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

LARGE HAIL AND DAMAGING WINDS AND CONTINUOUS CLOUD TO GROUND
LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY.
LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...IF YOU CAN
HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3739 11069 3739 11062 3743 11062 3748 11030
      3732 11029 3732 11043 3730 11044 3729 11050
      3727 11051 3727 11056 3726 11056 3725 11058
      3726 11064 3730 11064 3730 11069
TIME...MOT...LOC 0510Z 266DEG 20KT 3734 11061 

HAIL...1.00IN
WIND...60MPH

$$

JDC
2 follow-up statements
961 
WWUS55 KGJT 110532
SVSGJT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1132 PM MDT WED JUN 10 2015

UTC037-110545-
/O.CON.KGJT.SV.W.0021.000000T0000Z-150611T0545Z/
SAN JUAN UT-
1132 PM MDT WED JUN 10 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM MDT
FOR SOUTHWESTERN SAN JUAN COUNTY...

AT 1131 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED 13 MILES SOUTHEAST
OF HALLS CROSSING...OR 33 MILES NORTHWEST OF MEXICAN HAT...MOVING
EAST AT 25 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING AND TREES. 

THIS SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
SOUTHWESTERN SAN JUAN COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

LARGE HAIL AND DAMAGING WINDS AND CONTINUOUS CLOUD TO GROUND
LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY.
LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...IF YOU CAN
HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3740 11045 3746 11043 3748 11030 3732 11029
      3732 11043 3730 11044 3729 11050 3727 11051
      3732 11056 3727 11056 3726 11058 3727 11057
      3730 11059 3735 11054
TIME...MOT...LOC 0531Z 266DEG 20KT 3735 11046 

HAIL...1.00IN
WIND...60MPH

$$

JDC
808 
WWUS55 KGJT 110536
SVSGJT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1136 PM MDT WED JUN 10 2015

UTC037-110546-
/O.EXP.KGJT.SV.W.0021.000000T0000Z-150611T0545Z/
SAN JUAN UT-
1136 PM MDT WED JUN 10 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SAN JUAN COUNTY
WILL EXPIRE AT 1145 PM MDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER GUSTY WINDS
ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 3740 11045 3746 11043 3748 11030 3732 11029
      3732 11043 3730 11044 3729 11050 3727 11051
      3732 11056 3727 11056 3726 11058 3727 11057
      3730 11059 3735 11054
TIME...MOT...LOC 0533Z 266DEG 20KT 3735 11046 

$$

JDC

The office that day

Everything else NWS Grand Junction, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 10, 8:17 PM MDTSpecial Weather StatementGJTGrand43 min
Jun 10, 10:57 PM MDTSpecial Weather StatementGJTSan Juan48 min
Jun 10, 11:07 PM MDTSpecial Weather StatementGJTSan Juan38 min
Jun 10, 11:12 PM MDTSevere Thunderstorm WarningGJTSan Juan33 min
Jun 10, 11:40 PM MDTSevere Thunderstorm WarningGJTSan Juan35 min
Jun 11, 12:57 AM MDTSevere Thunderstorm WarningGJTSan Juan33 min
Jun 11, 1:03 AM MDTFlash Flood WarningGJTSan Juan3 hr
Jun 11, 11:17 AM MDTAreal Flood AdvisoryGJTGrand6 hr
Jun 11, 12:01 PM MDTFlash Flood WarningGJTGrand3 hr
Jun 11, 12:19 PM MDTFlash Flood WarningGJTGrand3 hr
Jun 11, 1:07 PM MDTAreal Flood AdvisoryGJTSan Juan3 hr
Jun 11, 2:17 PM MDTFlash Flood WarningGJTSan Juan6 hr

Nearby

Severe Thunderstorm Warnings in Utah, 2015Every severe thunderstorm 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.