Alert archive / Utah / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 22, NWS Grand Junction, CO

June 10, 2015San Juan County, Utah

NWS Grand Junction, CO issued this severe thunderstorm warning at Jun 10, 2015, 11:40 PM MDT for San Juan County, Utah. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 10, 2015, 11:40 PM MDT (05:40 UTC)
Expired
Jun 11, 2015, 12:15 AM MDT
In force
35 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 Grand Junction radar (KGJX), 212 km from the middle of the area, began a volume at 05:42 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

Grand Junction, CO (KGJT), launched 00:00Z, 5.7 hours before the alert went out and 202 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, Grand Junction, CO at 00:00Z on 2015-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 130 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Grand Junction, CO at 00:00Z on 2015-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
130 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
1249 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
129 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Junction, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 10, 5:50 PM MDT, 5 hours 50 minutes earlier.

Area forecast discussion, Jun 10, 5:50 PM MDT, 5 hours 50 minutes before
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Hazardous weather outlook, Jun 10, 5:29 AM MDT, 18 hours 11 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
529 AM MDT WED JUN 10 2015

COZ001>014-017>023-UTZ022>025-027>029-111200-
LOWER YAMPA RIVER BASIN-CENTRAL YAMPA RIVER BASIN-
ROAN AND TAVAPUTS PLATEAUS-ELKHEAD AND PARK MOUNTAINS-
UPPER YAMPA RIVER BASIN-GRAND VALLEY-DEBEQUE TO SILT CORRIDOR-
CENTRAL COLORADO RIVER BASIN-GRAND AND BATTLEMENT MESAS-
GORE AND ELK MOUNTAINS/CENTRAL MOUNTAIN VALLEYS-
CENTRAL GUNNISON AND UNCOMPAHGRE RIVER BASIN-
WEST ELK AND SAWATCH MOUNTAINS-FLATTOPS-
UPPER GUNNISON RIVER VALLEY-UNCOMPAHGRE PLATEAU AND DALLAS DIVIDE-
NORTHWEST SAN JUAN MOUNTAINS-SOUTHWEST SAN JUAN MOUNTAINS-
PARADOX VALLEY/LOWER DOLORES RIVER-
FOUR CORNERS/UPPER DOLORES RIVER-ANIMAS RIVER BASIN-
SAN JUAN RIVER BASIN-SOUTHEAST UTAH-EASTERN UINTA MOUNTAINS-
EASTERN UINTA BASIN-TAVAPUTS PLATEAU-ARCHES/GRAND FLAT-
LA SAL AND ABAJO MOUNTAINS-CANYONLANDS/NATURAL BRIDGES-
529 AM MDT WED JUN 10 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN UTAH AND WESTERN
COLORADO.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND THUNDERSTORMS...SOME HEAVY...WILL MOVE ACROSS THE
FORECAST AREA TODAY AND CONTINUE THROUGH THIS EVENING. HEAVY
RAINFALL WILL INCREASE AS THE DAY PROGRESSES INCREASING FLASH
FLOOD POTENTIAL SO A FLASH FLOOD WATCH HAS BEEN ISSUED. SHOWERS
WILL CONTINUE OVERNIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

LITTLE CHANGE THROUGH TUESDAY AS MOISTURE REMAINS IN THE AREA
BRINGING AFTERNOON SHOWERS AND STORMS. FROM SUNDAY
ONWARDS...HIGHER TERRAIN WILL BE FAVORED FOR CONVECTION.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED TODAY OR TONIGHT...HOWEVER
SPOTTERS ARE ENCOURAGED TO RELAY RAINFALL AMOUNTS OR ANY OBSERVED
FLOODING TO THE GRAND JUNCTION FORECAST OFFICE.

In the hours before

Special weather statement, Jun 10, 8:17 PM MDT, 3 hours 23 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
817 PM MDT WED JUN 10 2015

COZ017-020-UTZ027-110300-
PARADOX VALLEY/LITTLE DOLORES RIVER CO-
UNCOMPAHGRE PLATEAU/DALLAS DIVIDE CO-ARCHES/GRAND FLAT UT-
817 PM MDT WED JUN 10 2015

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL MESA AND
SOUTHEASTERN GRAND COUNTIES UNTIL 900 PM MDT...

AT 816 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 11
MILES NORTH OF CASTLE VALLEY...MOVING EAST AT 20 MPH.

DIME SIZE HAIL WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
GATEWAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3895 10896 3868 10893 3869 10906 3873 10906
      3874 10907 3874 10913 3871 10915 3869 10919
      3870 10945 3888 10947
TIME...MOT...LOC 0216Z 265DEG 18KT 3880 10937

JDC
Local storm report, Jun 10, 10:48 PM MDT, 52 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1048 PM MDT WED JUN 10 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0600 PM     HEAVY RAIN       3 W BAYFIELD            37.23N 107.65W
06/10/2015  M1.50 INCH       LA PLATA           CO   PUBLIC

            24 HOUR REPORT ENDING AT 6 PM MDT

&&

EVENT NUMBER GJT1500808

JDC
Local storm report, Jun 10, 10:53 PM MDT, 47 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1053 PM MDT WED JUN 10 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1100 AM     HEAVY RAIN       DURANGO                 37.29N 107.87W
06/10/2015  M0.70 INCH       LA PLATA           CO   PUBLIC

            7 HOUR TOTAL ENDING AT 11 AM THIS MORNING.

&&

EVENT NUMBER GJT1500809

JDC
Special weather statement, Jun 10, 10:57 PM MDT, 43 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1057 PM MDT WED JUN 10 2015

UTZ022-029-110545-
CANYONLANDS/NATURAL BRIDGES UT-SOUTHEAST UTAH UT-
1057 PM MDT WED JUN 10 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN SAN JUAN COUNTY
UNTIL 1145 PM MDT...

AT 1057 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7
MILES SOUTHEAST OF HALLS CROSSING...OR 41 MILES WEST OF MEXICAN
HAT...MOVING EAST AT 30 MPH.

DIME SIZE HAIL WILL BE POSSIBLE WITH THIS STORM ALONG WITH FREQUENT
LIGHTNING AND TORRENTIAL RAINFALL.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3739 11069 3739 11062 3745 11062 3745 11053
      3750 11053 3757 10993 3724 10987 3724 11006
      3727 11004 3733 11010 3733 11018 3724 11007
      3724 11027 3731 11027 3732 11043 3723 11065
      3730 11064 3730 11069
TIME...MOT...LOC 0457Z 260DEG 39KT 3735 11062

TGR
Special weather statement, Jun 10, 11:07 PM MDT, 33 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1107 PM MDT WED JUN 10 2015

UTZ029-110545-
CANYONLANDS/NATURAL BRIDGES UT-
1107 PM MDT WED JUN 10 2015

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL SAN JUAN COUNTY
UNTIL 1145 PM MDT...

AT 1106 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 12
MILES EAST OF TICABOO...OR 46 MILES NORTHWEST OF MEXICAN HAT...MOVING
EAST AT 25 MPH.

HALF INCH HAIL AND WIND GUSTS OF 50 TO 55 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
FRY CANYON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3762 11046 3764 11046 3764 11044 3766 11044
      3767 11038 3768 11038 3769 11037 3775 11037
      3779 11002 3752 11001 3754 11053 3762 11053
TIME...MOT...LOC 0506Z 267DEG 21KT 3765 11047

JDC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 9:28 PM MDTAreal Flood AdvisoryGJTMesa2 hr
Jun 10, 9:30 PM MDTAreal Flood AdvisoryGJTMesa3 hr
Jun 11, 9:27 AM MDTAreal Flood WarningGJTLa Plata60 hr
Jun 11, 9:41 AM MDTAreal Flood AdvisoryGJTArchuleta24 hr
Jun 11, 11:17 AM MDTAreal Flood AdvisoryGJTGarfield, Mesa6 hr
Jun 11, 11:23 AM MDTAreal Flood AdvisoryGJTLa Plata, San Juan60 hr
Jun 11, 12:39 PM MDTFlash Flood WarningGJTLa Plata3 hr
Jun 11, 1:37 PM MDTSpecial Weather StatementGJTArchuleta38 min
Jun 11, 2:42 PM MDTFlash Flood WarningGJTMontrose, Ouray3 hr
Jun 11, 2:58 PM MDTFlash Flood WarningGJTSan Miguel3 hr
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, 11:12 PM MDTSevere Thunderstorm WarningGJTSan Juan33 min
Jun 11, 12:57 AM MDTSevere Thunderstorm WarningGJTSan Juan33 min
Jun 11, 1:03 AM MDTFlash Flood WarningGJTSan Juan3 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.