Alert archive / Wyoming / Special Weather Statements in 2012

Special Weather Statement, NWS Riverton, WY

June 2, 2012

NWS Riverton, WY issued this special weather statement at Jun 2, 2012, 4:13 PM MDT. It was in force for 32 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 2, 2012, 4:13 PM MDT (22:13 UTC)
Expired
Jun 2, 2012, 4:45 PM MDT
In force
32 min
Issued by
NWS Riverton, WY

The radar

The Billings radar (KBLX), 199 km from the middle of the area, began a volume at 22:14 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

Great_falls, MT (KTFX), launched 12:00Z, 10.2 hours before the alert went out and 286 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, Great_falls, MT at 12:00Z on 2012-06-02Temperature 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 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Great_falls, MT at 12:00Z on 2012-06-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 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
1977 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
66 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 2, 3:22 PM MDT, 51 minutes earlier.

Area forecast discussion, Jun 2, 3:22 PM MDT, 51 minutes before
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Hazardous weather outlook, Jun 2, 5:00 AM MDT, 11 hours 13 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
500 AM MDT SAT JUN 2 2012

WYZ001>020-022>030-031200-
ABSAROKA MOUNTAINS-BIGHORN MOUNTAINS SOUTHEAST-
BIGHORN MOUNTAINS WEST-CASPER MOUNTAIN-CODY FOOTHILLS-
EAST SWEETWATER COUNTY-FLAMING GORGE-
GREEN MOUNTAINS AND RATTLESNAKE RANGE-JACKSON HOLE-LANDER FOOTHILLS-
NATRONA COUNTY LOWER ELEVATIONS-NORTH BIG HORN BASIN-
NORTHEAST JOHNSON COUNTY-OWL CREEK AND BRIDGER MOUNTAINS-
ROCK SPRINGS AND GREEN RIVER-SALT RIVER AND WYOMING RANGES-
SOUTH LINCOLN COUNTY-SOUTHEAST BIG HORN BASIN-
SOUTHEAST JOHNSON COUNTY-SOUTHWEST BIG HORN BASIN-STAR VALLEY-
TETON AND GROS VENTRE MOUNTAINS-UPPER GREEN RIVER BASIN-
UPPER GREEN RIVER BASIN FOOTHILLS-UPPER WIND RIVER BASIN-
WIND RIVER BASIN-WIND RIVER MOUNTAINS EAST-WIND RIVER MOUNTAINS WEST-
YELLOWSTONE NATIONAL PARK-
500 AM MDT SAT JUN 2 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.

.DAY ONE...TODAY AND TONIGHT

ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ARE ANTICIPATED
ACROSS MUCH OF THE AREA THIS AFTERNOON. SOME STORMS ACROSS WESTERN
WYOMING MAY BECOME STRONG TO SEVERE...WITH STRONG WIND...HAIL...AND
PERIODS OF FREQUENT LIGHTNING. THUNDERSTORMS ACROSS THE MUCH OF THE
REMAINDER OF THE AREA MAY REMAIN DRY...THOUGH MAY CONTAIN GUSTY
WIND.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

ENTIRE PERIOD...ISOLATED TO LOCALLY SCATTERED THUNDERSTORMS ARE
POSSIBLE...ESPECIALLY OVER THE NORTHWEST MOUNTAINS AND THE BIGHORN
MOUNTAINS.

MONDAY...STRONG STORMS POSSIBLE ACROSS THE NORTHWEST...NORTH AND
EASTERN SECTIONS OF THE AREA. EXTREME FIRE WEATHER BEHAVIOR IN A FEW
AREAS.

TUESDAY...WIDESPREAD EXTREME FIRE WEATHER BEHAVIOR POSSIBLE WHERE
FUELS ARE CRITICAL. STRONG THUNDERSTORMS POSSIBLE FAR WEST...LATE
AFTERNOON AND EVENING.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT WIND SPEEDS AND HAIL SIZE WITH ANY
THUNDERSTORM ACTIVITY TODAY. THANK YOU.

TEAM RIVERTON

In the hours before

Special weather statement, Jun 2, 3:22 PM MDT, 51 minutes before
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Special weather statement, Jun 2, 3:24 PM MDT, 49 minutes before
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Special weather statement, Jun 2, 3:54 PM MDT, 19 minutes before
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Special weather statement, Jun 2, 4:01 PM MDT, 12 minutes before
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Special weather statement, Jun 2, 4:02 PM MDT, 11 minutes before
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Special weather statement, Jun 2, 4:13 PM MDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 2, 9:41 AM MDTSpecial Weather StatementRIWTeton79 min
Jun 2, 9:49 AM MDTSpecial Weather StatementRIWTeton71 min
Jun 2, 9:55 AM MDTSpecial Weather StatementRIWTeton50 min
Jun 2, 10:07 AM MDTSpecial Weather StatementRIW38 min
Jun 2, 11:30 AM MDTSpecial Weather StatementRIWPark45 min
Jun 2, 12:07 PM MDTSpecial Weather StatementRIWSweetwater38 min
Jun 2, 12:20 PM MDTSpecial Weather StatementRIWBig Horn70 min
Jun 2, 12:47 PM MDTSpecial Weather StatementRIW58 min
Jun 2, 12:59 PM MDTSpecial Weather StatementRIWBig Horn31 min
Jun 2, 1:11 PM MDTSpecial Weather StatementRIWBig Horn, Washakie49 min
Jun 2, 1:26 PM MDTSpecial Weather StatementRIW49 min
Jun 2, 2:11 PM MDTSpecial Weather StatementRIWLincoln49 min
Jun 2, 2:37 PM MDTSpecial Weather StatementRIWNatrona53 min
Jun 2, 2:41 PM MDTSpecial Weather StatementRIWHot Springs49 min
Jun 2, 2:58 PM MDTSpecial Weather StatementRIW47 min
Jun 2, 3:24 PM MDTSpecial Weather StatementRIWNatrona51 min
Jun 2, 4:01 PM MDTSpecial Weather StatementRIWNatrona29 min
Jun 2, 4:02 PM MDTSpecial Weather StatementRIWNatrona28 min
Jun 2, 4:57 PM MDTSpecial Weather StatementRIW33 min

Nearby

Special Weather Statements in Wyoming, 2012Every special weather statement in 2012

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.