Alert archive / Wyoming / Special Weather Statements in 2015

Special Weather Statement, NWS Riverton, WY

June 15, 2015Sweetwater County, Wyoming

NWS Riverton, WY issued this special weather statement at Jun 15, 2015, 3:13 PM MDT for Sweetwater County, Wyoming. It was in force for 47 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 15, 2015, 3:13 PM MDT (21:13 UTC)
Expired
Jun 15, 2015, 4:00 PM MDT
In force
47 min
Issued by
NWS Riverton, WY

County Sweetwater County, WY

The radar

The Riverton/Lander radar (KRIW), 160 km from the middle of the area, began a volume at 21:14 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

Riverton, WY (KRIW), launched 12:00Z, 9.2 hours before the alert went out and 162 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, Riverton, WY at 12:00Z on 2015-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Riverton, WY at 12:00Z on 2015-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
889 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
345 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.

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What forecasters said that day

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

NWS Riverton, WY wrote its last area forecast discussion before this special weather statement went out at Jun 15, 12:38 PM MDT, 2 hours 35 minutes earlier.

Area forecast discussion, Jun 15, 12:38 PM MDT, 2 hours 35 minutes before
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Hazardous weather outlook, Jun 15, 2:35 PM MDT, 38 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
235 PM MDT MON JUN 15 2015

WYZ001>020-022>030-161200-
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-CODY FOOTHILLS-
NORTH BIG HORN BASIN-SOUTHWEST BIG HORN BASIN-
SOUTHEAST BIG HORN BASIN-OWL CREEK AND BRIDGER MOUNTAINS-
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY-
TETON AND GROS VENTRE MOUNTAINS-JACKSON HOLE-
WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-
UPPER WIND RIVER BASIN-WIND RIVER BASIN-LANDER FOOTHILLS-
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
NATRONA COUNTY LOWER ELEVATIONS-CASPER MOUNTAIN-STAR VALLEY-
SALT RIVER AND WYOMING RANGES-UPPER GREEN RIVER BASIN FOOTHILLS-
UPPER GREEN RIVER BASIN-SOUTH LINCOLN COUNTY-
ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY-
235 PM MDT MON JUN 15 2015

...SEVERE THUNDERSTORM WATCH UNTIL 11 PM MDT FOR MUCH OF CENTRAL
AND WESTERN WYOMING...

...FLASH FLOOD WATCH FOR NORTHERN AND CENTRAL WYOMING ALONG AND
EAST OF THE CONTINENTAL DIVIDE FROM 3 PM THIS AFTERNOON THROUGH
12 MIDNIGHT TUESDAY NIGHT...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WY...CENTRAL
WYOMING...NORTH CENTRAL WYOMING...NORTHWEST WYOMING...SOUTH
CENTRAL WYOMING AND WEST CENTRAL WYOMING.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED TO NUMEROUS THUNDERSTORMS. A FEW STRONG TO SEVERE
THUNDERSTORMS ALSO EXPECTED ALONG WITH POTENTIAL FLASH FLOOD
PRODUCING STORMS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

TUESDAY...ISOLATED TO SCATTERED THUNDERSTORMS ACROSS NORTHERN AND
CENTRAL WYOMING. A FEW STRONG TO SEVERE THUNDERSTORMS WILL AGAIN
BE POSSIBLE ALONG WITH SOME WITH VERY HEAVY RAIN WHICH WILL HAVE
THE POTENTIAL TO PRODUCE FLASH FLOODING.

WEDNESDAY AND THURSDAY...ISOLATED AFTERNOON AND EVENING
THUNDERSTORMS ACROSS NORTHERN WYOMING.

FRIDAY AND SATURDAY...ISOLATED TO SCATTERED THUNDERSTORMS MAINLY
ALONG AND EAST OF THE DIVIDE.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT ANY FLOODING...RIVERS OUT OF THEIR
BANKS...OR NORMALLY DRY WASHES RUNNING WITH WATER. SPOTTERS ARE ALSO
ENCOURAGED TO REPORT HEAVY RAIN...HAIL OF ANY SIZE...AND DAMAGING
WIND GUSTS. THANK YOU.

TEAM RIVERTON

In the hours before

Special weather statement, Jun 15, 1:35 PM MDT, 1 hour 38 minutes before
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Special weather statement, Jun 15, 2:39 PM MDT, 34 minutes before
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Special weather statement, Jun 15, 2:43 PM MDT, 30 minutes before
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Special weather statement, Jun 15, 2:58 PM MDT, 15 minutes before
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Special weather statement, Jun 15, 3:01 PM MDT, 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
301 PM MDT MON JUN 15 2015

WYZ012-013-152145-
JACKSON HOLE-TETON AND GROS VENTRE MOUNTAINS-
301 PM MDT MON JUN 15 2015

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL TETON COUNTY UNTIL 345 PM
MDT...

AT 300 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
ALTA...MOVING NORTHEAST AT 25 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THIS STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  MOUNT MORAN AROUND 330 PM MDT.
  MORAN BAY AROUND 335 PM MDT.

OTHER LOCATIONS IMPACTED BY THIS STORM INCLUDE TETON CAMPGROUND...
SIGNAL MOUNTAIN CAMPGROUND...JACKSON LAKE LODGE...GRAND TARGHEE
RESORT...LEEKS LODGE...TARGHEE VILLAGE GOLF COURSE...LIZARD CREEK
CAMPGROUND...JENNY LAKE CAMPGROUND...SIGNAL MOUNTAIN LODGE AND JENNY
LAKE LODGE.

#

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.

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM MDT FOR
NORTHWESTERN WYOMING.

LAT...LON 4409 11104 4408 11016 4357 11096 4359 11105
TIME...MOT...LOC 2100Z 208DEG 23KT 4371 11101

BRANHAM
Special weather statement, Jun 15, 3:13 PM MDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
313 PM MDT MON JUN 15 2015

WYZ028-030-152200-
ROCK SPRINGS AND GREEN RIVER-EAST SWEETWATER COUNTY-
313 PM MDT MON JUN 15 2015

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SWEETWATER COUNTY UNTIL
400 PM MDT...

AT 312 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
ROCK SPRINGS...MOVING EAST AT 30 MPH.

DIME SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  SWEETWATER COUNTY AIRPORT AROUND 320 PM MDT.
  SUPERIOR AROUND 335 PM MDT.

#

THIS INCLUDES INTERSTATE 80 BETWEEN MILE MARKERS 103 AND 142.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

VERY HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO LOCALIZED 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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
OFFICE IN RIVERTON.

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM MDT FOR
SOUTH CENTRAL WYOMING.

LAT...LON 4156 10925 4178 10929 4197 10862 4152 10854
TIME...MOT...LOC 2112Z 263DEG 27KT 4167 10917

13

The office that day

Everything else NWS Riverton, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 14, 7:03 PM MDTSpecial Weather StatementRIWFremont42 min
Jun 14, 7:05 PM MDTSpecial Weather StatementRIW40 min
Jun 14, 7:14 PM MDTSevere Thunderstorm WarningRIWFremont18 min
Jun 14, 7:30 PM MDTSevere Thunderstorm WarningRIWFremont29 min
Jun 14, 7:39 PM MDTSevere Thunderstorm WarningRIWFremont51 min
Jun 14, 8:10 PM MDTSevere Thunderstorm WarningRIWFremont34 min
Jun 14, 8:54 PM MDTSpecial Weather StatementRIW36 min
Jun 14, 9:30 PM MDTSpecial Weather StatementRIWNatrona45 min
Jun 15, 11:56 AM MDTSpecial Weather StatementRIW49 min
Jun 15, 12:42 PM MDTSpecial Weather StatementRIW33 min
Jun 15, 1:35 PM MDTSpecial Weather StatementRIW10 min
Jun 15, 2:39 PM MDTSpecial Weather StatementRIWTeton36 min
Jun 15, 2:43 PM MDTSpecial Weather StatementRIWSweetwater47 min
Jun 15, 2:58 PM MDTSpecial Weather StatementRIWSweetwater47 min
Jun 15, 3:01 PM MDTSpecial Weather StatementRIWTeton44 min
Jun 15, 3:45 PM MDTSpecial Weather StatementRIWSweetwater45 min
Jun 15, 3:48 PM MDTSpecial Weather StatementRIW42 min
Jun 15, 4:16 PM MDTSpecial Weather StatementRIWTeton44 min
Jun 15, 4:31 PM MDTSpecial Weather StatementRIW44 min
Jun 15, 4:57 PM MDTTornado WarningRIWLincoln33 min
Jun 15, 5:04 PM MDTSpecial Weather StatementRIW26 min
Jun 15, 5:14 PM MDTSpecial Weather StatementRIWTeton31 min
Jun 15, 5:31 PM MDTSpecial Weather StatementRIW29 min
Jun 15, 5:38 PM MDTSevere Thunderstorm WarningRIWTeton37 min

Nearby

Special Weather Statements in Wyoming, 2015Every special weather statement 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.