Alert archive / Wyoming / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 47, NWS Riverton, WY

June 26, 2014Natrona County, Wyoming

NWS Riverton, WY issued this severe thunderstorm warning at Jun 26, 2014, 6:33 PM MDT for Natrona County, Wyoming. It was in force for 18 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 26, 2014, 6:33 PM MDT (00:33 UTC)
Expired
Jun 26, 2014, 6:51 PM MDT
In force
18 min
Issued by
NWS Riverton, WY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Natrona County, WY

The radar

The Riverton/Lander radar (KRIW), 137 km from the middle of the area, began a volume at 00:35 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 00:00Z, 0.6 hours before the alert went out and 131 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 00:00Z on 2014-06-27Temperature 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 00:00Z on 2014-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -136 square meters per square second.193958Sfc1 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
1814 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
-136 m²/s²
0-3 km storm-relative helicity
-56 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

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 Riverton, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 26, 3:37 PM MDT, 2 hours 56 minutes earlier.

Area forecast discussion, Jun 26, 3:37 PM MDT, 2 hours 56 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
337 PM MDT THU JUN 26 2014

.SHORT TERM...TONIGHT THROUGH FRIDAY

WE SHOULD SEE THREE DISTINCT ROUNDS OF CONVECTION DURING THE NEXT 24
HOURS. THE FIRST ONE IS NOW OCCURRING WITH A LEAD SHORTWAVE TROUGH
AHEAD OF THE MAIN APPROACHING TROUGH WHICH IS NOW TRACKING EAST
ACROSS THE GREAT BASIN. THIS LEAD WAVE HAS PRODUCED MAINLY LIGHT
SHOWERS ACROSS MUCH OF WESTERN WYOMING THIS MORNING. NOW THAT THIS
WAVE HAS MOVED EAST AND ALLOWED THE ASSOCIATED MID LEVEL CLOUDS TO
CLEAR OUT...A FRESH ROUND OF CONVECTION HAS DEVELOPED AND IS
PRODUCING RAPIDLY DEVELOPING THUNDERSTORMS ACROSS MAINLY NORTHERN WY
ALONG WITH LESS COVERAGE TO THE SOUTH. A SEVERE THUNDERSTORM WATCH
IS NOW IN EFFECT FOR WASHAKIE...BIG HORN AND JOHNSON COUNTIES. DEW
POINTS ARE AS HIGH AS 60 AT BYG. BEST CAPES AND LIFTED INDICES
HAVE BEEN IN THESE AREAS. THE THIRD ROUND OF SHOWER ACTIVITY WILL
BE MORE DIRECTLY ASSOCIATED WITH THE MAIN TROUGH ITSELF TONIGHT
AND FRIDAY. DYNAMICS ASSOCIATED WITH THE MAIN WAVE APPROACHING
FROM THE WEST HAS INITIATED STRONG STORMS IN THE FAR WEST AS WELL. ANOTHER
WAVE OF SHOWERS ALONG WITH A FEW EMBEDDED THUNDERSTORMS ASCT WITH
THIS SAME WAVE SHOULD MOVE INTO FAR WESTERN WY LATE THIS EVENING
AND SPREAD ACROSS SOUTHERN AND CENTRAL WY AFTER 12Z FRIDAY AND
THEN WILL PRIMARILY AFFECT AREAS ALONG AND NORTH OF THE OWL CREEK
MTNS AND ALONG AND EAST OF THE CASPER ARCH AFTER 18Z FRIDAY AS
DYNAMICS TRUMP OROGRAPHICS AND DAY TIME HEATING IN MANY AREAS. THERE
IS A HINT THAT A MID LEVEL CIRCULATION WILL TRY TO ESTABLISH
ITSELF TONIGHT AROUND 06Z OVER NORTH CENTRAL WY. WRAP AROUND
PRECIP WILL LIKELY CONTINUE FRIDAY AROUND THE BACK SIDE OF THIS
LOW OVER THE AFOREMENTIONED AREAS. THERE APPEARS TO BE A STRONG
POTENTIAL FOR FLOODING ALONG THE VICINITY OF THE TRACK OF THIS
CIRCULATION FROM ALONG THE OWL CREEK MTNS NORTH....MAINLY EAST OF
THE DIVIDE...ESPECIALLY IN AREAS THAT HAVE RECEIVED LOCALLY
COPIOUS AMOUNTS OF RAINFALL DURING THE PAST FEW DAYS FROM OTHER
CONVECTIVE CELLS...NAMELY THE OWL CREEK AND BIG HORN MTNS AS WELL
AS THE LOWER ELEVATIONS OF JOHNSON COUNTY. WENT AHEAD AND ISSUED A
FLOOD WATCH FOR THESE AREAS VALID 09Z TONIGHT THROUGH 00Z SAT. THE
WRF IS ADVERTISING AS MUCH AS 3.75 INCHES OF RAINFALL ACROSS
PORTIONS OF HOT SPRINGS COUNTY DURING THE NEXT 24 HOURS. IF ONE
CUTS THIS AMOUNT IN HALF...WHICH SEEMS TO WORK WELL WITH THE
WRF...SOME AREAS COULD RECEIVE BETWEEN 1.75 AND 2 INCHES OF
RAINFALL BY THE END OF FRIDAY. TEMPERATURES WILL COOL
SIGNIFICANTLY FRIDAY DUE TO THE COOL AIR ADVECTION ALONG WITH THE
NUMEROUS SHOWERS AND CLOUDS. MANY LOCATIONS COULD SEE HIGH
TEMPERATURES AT LEAST 10 TO 15 DEGREES COOLER FRIDAY THAN TODAY.
THE SNOW LEVEL WILL LIKELY DROP TO 10K ACROSS MUCH OF THE MTNS
FRIDAY. FRIDAY WILL FEEL MORE LIKE SPRING THAN SUMMER.

.LONG TERM...FRIDAY NIGHT THROUGH THURSDAY

TAIL END OF OUR ACTIVE SHORT TERM SYSTEM WILL LINGER INTO FRIDAY
EVENING WITH A GOOD CHANCE OF SHOWERS EAST OF THE DIVIDE...MOST
NUMEROUS IN THE MOUNTAINS WITH HIGHER PEAK SNOW SHOWERS. SYSTEM
MOVES OFF TO THE NE LATER FRIDAY NIGHT WITH GRADUALLY DECREASING
SHOWERS. ON SATURDAY...A DISTURBANCE MOVES ACROSS MT AND BRUSHES FAR
NRN WYOMING. BEST SHOT OF SHOWERS AND THUNDERSTORMS WILL BE IN THE
FAR NORTH...ESPECIALLY IN THE MOUNTAINS. DRIER WNW FLOW ON SUNDAY AS
HEIGHTS BEGIN TO RISE AND MID LEVEL TEMPERATURES WARM. SOME MARGINAL
INSTABILITY STILL POSSIBLE IN THE NRN MOUNTAINS SO WILL KEEP IDEA OF
ISOLATED SHOWERS AND A SLGT CHANCE OF TSTMS. IN ADDITION...ANOTHER
SHORTWAVE MOVING ACROSS MT MAY BE JUST CLOSE ENOUGH TO THE FAR NRN
ZONES TO AID AT LEAST A LITTLE. RIDGE CONTINUES TO BUILD TO THE WEST
EARLY NEXT WEEK WHILE STRONG UPPER LOW DEVELOPS OVER THE NRN HIGH
PLAINS AND SRN CANADA NORTH OF ND AND MN. COOLER AND GENERALLY MORE
STABLE AIR IS USHERED IN BEHIND ANOTHER COLD FRONT TO KEEP
TEMPERATURES WELL BELOW NORTH EAST OF THE DIVIDE MONDAY WITH SOME
MODERATION BY TUESDAY. IT'S NOT UNTIL WEDNESDAY AND THURSDAY OF NEXT
WEEK THAT THE GUIDANCE IS SHOWING THE RIDGE MOVING EITHER OVER US OR
JUST TO OUR WEST WITH VERY WARM MID LEVEL TEMPERATURES LEADING TO
POTENTIALLY A COUPLE HOT DAYS. BUT UNTIL THEN...A FEW MORE COOL DAYS.

&&

.AVIATION.../00Z ISSUANCE/

WEST OF THE DIVIDE...KBPI/KJAC/KPNA/KRKS ROUTES

A STRONG UPPER LOW...ESPECIALLY FOR SUMMER...OVER THE PACIFIC
NORTHWEST TODAY...HAS PUSHED A COLD FRONT THROUGH THE AREA AROUND
MID DAY TODAY. SOME CONVECTION...EVEN SCATTERED TO LOCALLY
NUMEROUS SHOWERS/THUNDERSTORMS EXPECTED DURING THE REMAINDER OF
THIS AFTERNOON. ALTHOUGH CONVECTION WILL DECREASE IN INTENSITY IN
THE EVENING...DYNAMICS ASSOCIATED WITH THE UPPER LOW WILL KEEP
GOOD CHANCES OF CONVECTION...ISOLD THUNDER...ONGOING ACROSS
NORTHWEST WYOMING ALL NIGHT. MVFR/IFR CONDITIONS WILL BE POSSIBLE
TODAY..BUT MORE PERSISTENT MFVR CONDITIONS ARE
POSSIBLE...ESPECIALLY KJAC AFTER 00Z. MOUNTAINS WILL BE OBSCURED
AT TIMES TODAY...WITH NORTHWEST MOUNTAINS INCREASING BECOMING
OBSCURED DURING THE EARLY EVENING. THERE IS A LIKELIHOOD OF
WIDESPREAD NEAR MVFR CEILINGS DEVELOPING AFTER 12Z UNTIL 18Z ALONG
WITH LOCAL MVFR CONDITIONS/MTN OBSCURATIONS AND ISOLD IFR
CONDITIONS IN WAKE OF THE COLD FRONT.

EAST OF THE DIVIDE...KCOD/KCPR/KLND/KRIW/KWRL ROUTES

A COLD FRONT ASSOCIATED WITH A STRONG UPPER LOW BEGINS TO PUSH
INTO THE AREA. THE MAIN BRUNT OF THE COLD FRONT IS EXPECTED
THROUGH 03Z. ISOLATED TO SCATTERED CONVECTION IS EXPECTED DURING
THE REMAINDER OF THIS AFTERNOON...WITH THE BEST SHOT ACROSS THE
NORTH AND NORTHEAST SECTIONS OF THE AREA. THERE COULD BE A BRIEF
BREAK IN THE CONVECTION IN THE EARLY EVENING...BEFORE MORE SHOWERY
ACTIVITY DEVELOPS WITH THE APPROACH OF THE MID/UPPER LOW BY LATE
EVENING...WITH THE BEST CHANCE OVER THE BIG HORN BASIN. BRIEF
MVFR/IFR CONDITIONS ARE EXPECTED IN CONVECTION. THERE IS A
LIKELIHOOD OF WIDESPREAD MVFR CEILINGS DEVELOPING FROM 12Z TO 18Z
AT KLND AND KRIW AND AFTER 18Z AT KWRL/KCOD/KCPR ALONG WITH LOCAL
MVFR CONDITIONS/MTN OBSCURATIONS AND ISOLD IFR CONDITIONS IN WAKE
OF THE COLD FRONT.

&&

.FIRE WEATHER...

THE COLD FRONT THAT IS NOW OVER WESTERN WYOMING WILL MOVE ACROSS ALL
AREAS LATER TONIGHT...BUT BEFORE IT DOES THERE WILL BE SOME
ISOLATED TO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS AGAIN.
POTENTIALLY SEVERE THUNDERSTORMS WILL OCCUR ACROSS CASPER DISPATCH
WITH STRONG TO SEVERE STORMS ALSO POSSIBLE ACROSS CODY DISPATCH
THIS EVENING. WINDS WILL COME AROUND TO THE WEST/NORTHWEST FOR
MOST ZONES AS THE FRONT MEANDERS EASTWARD DURING THE REMAINDER OF
THIS AFTERNOON AND EVENING. STRONGER GUSTY WEST WINDS WILL LAY
ACROSS THE SOUTHERN ZONES 277 278 279 AND 289 WHERE IN COMBINATION
WITH SOME MIN RH VALUES IN THE 20S...WILL ENHANCE FIRE WEATHER
CONCERNS THROUGH EARLY THIS EVENING. MORE SHOWER AND THUNDERSTORM
ACTIVITY FOR FRIDAY...ALONG WITH MUCH COOLER TEMPERATURES AND MORE
CLOUD COVER ACROSS THE STATE AS WELL AS A GOOD CHANCE FOR WETTING
RAIN ACROSS THE STATE. THERE IS A POSSIBILITY OF FLOODING DUE TO
SUBSTANTIAL RAINFALL ACROSS ZONES 281...285 AND 287. THINGS WILL
CLEAR UP A BIT ON SATURDAY WITH A STEADY DRY AND WARM WESTERLY
FLOW DEVELOPING...ESPECIALLY ACROSS RAWLINS DISPATCH.

&&

.RIW WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...LIPSON
LONG TERM...SKRBAC
AVIATION...LIPSON
FIRE WEATHER...LIPSON
Hazardous weather outlook, Jun 26, 2:48 PM MDT, 3 hours 45 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
248 PM MDT THU JUN 26 2014

WYZ001>020-022>030-271100-
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-
248 PM MDT THU JUN 26 2014

...SEVERE THUNDERSTORM WATCH FOR WASHAKIE...BIG HORN AND JOHNSON
COUNTIES VALID THROUGH 9 PM THIS EVENING...

...FLOOD WATCH FOR PORTIONS OF CENTRAL AND NORTH CENTRAL WYOMING IN
EFFECT FROM 3 AM TONIGHT THROUGH 6 PM FRIDAY EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.

.DAY ONE...TODAY AND TONIGHT

ISOLATED TO SCATTERED THUNDERSTORMS...SOME COULD BE SEVERE ACROSS
BIG HORN...WASHAKIE AND JOHNSON COUNTIES THROUGH 9 PM THIS
EVENING WITH DAMAGING WIND AND HAIL. STORMS ACROSS WESTERN WYOMING
WILL HAVE GUSTY WIND AND PEA TO MARBLE SIZE HAIL...WITH A DRY
MICROBURST THREAT ACROSS SOUTHERN WYOMING LATER THIS AFTERNOON.

STORMS WILL CONTINUE INTO THE NIGHT WITH A FEW STRONGER STORMS STILL
POSSIBLE ACROSS NATRONA AND JOHNSON COUNTIES WITH HAIL AND GUSTY
WINDS STILL THE MAIN THREAT...ALONG WITH FREQUENT CLOUD TO GROUND
LIGHTNING AND TORRENTIAL DOWNPOURS.

FLOODING IS POSSIBLE AFTER 3 AM TONIGHT ACROSS PORTIONS OF CENTRAL
AND NORTH CENTRAL WYOMING. PLEASE SEE THE LATEST FLOOD WATCH FOR
MORE INFORMATION.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

FRIDAY...FLOODING IS POSSIBLE THROUGH 6 PM ACROSS PORTIONS OF CENTRAL
AND NORTH CENTRAL WYOMING. PLEASE SEE THE LATEST FLOOD WATCH FOR MORE
INFORMATION. SHOWERS AND THUNDERSTORMS ACROSS THE REST OF THE
REGION.

SATURDAY AND SUNDAY...ISOLATED THUNDERSTORMS ACROSS NORTHERN
WYOMING ON SATURDAY.  WINDY WITH ELEVATED FIRE DANGER ACROSS
THE SOUTHWEST AND SOUTH CENTRAL.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT ANY HAIL...WIND DAMAGE OR
FLOODING. THANK YOU.

TEAM RIVERTON

In the hours before

Local storm report, Jun 26, 4:45 PM MDT, 1 hour 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
445 PM MDT THU JUN 26 2014

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

0430 PM     HAIL             3 W RIVERTON            43.04N 108.47W
06/26/2014  M0.75 INCH       FREMONT            WY   NWS EMPLOYEE

0412 PM     HAIL             HUDSON                  42.90N 108.58W
06/26/2014  M0.88 INCH       FREMONT            WY   CO-OP OBSERVER

&&

CJONES
Special weather statement, Jun 26, 5:19 PM MDT, 1 hour 14 minutes before
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Special weather statement, Jun 26, 5:51 PM MDT, 42 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
551 PM MDT THU JUN 26 2014

WYZ024-026-027-270100-
SALT RIVER AND WYOMING RANGES WY-SOUTH LINCOLN COUNTY WY-UPPER GREEN
RIVER BASIN WY-
551 PM MDT THU JUN 26 2014

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LINCOLN COUNTY UNTIL
700 PM MDT...

AT 542 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 9 MILES NORTH OF LYMAN...OR 26 MILES SOUTHEAST OF
KEMMERER...MOVING NORTH AT 20 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

THIS STORM WILL BE NEAR...
OPAL AND KEMMERER AROUND 640 PM MDT.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

BRIEF HEAVY RAIN...WHICH MAY FLOOD LOW LYING OR POOR DRAINAGE AREAS.
DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY.

REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
RIVERTON AT 1-800-211-1448.

LAT...LON 4196 11071 4196 11006 4157 11007 4157 11070
TIME...MOT...LOC 2349Z 180DEG 19KT 4149 11030

MURRELL
Special weather statement, Jun 26, 6:09 PM MDT, 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
609 PM MDT THU JUN 26 2014

WYZ004-006-270100-
NORTH BIG HORN BASIN-SOUTHEAST BIG HORN BASIN-
609 PM MDT THU JUN 26 2014

A BAND OF THUNDERSTORMS WILL CONTINUE TO MOVE NORTHEAST INTO THE
EASTERN PORTION OF THE BIG HORN BASIN. THE STRONGEST THUNDERSTORM
CELL WILL LIKELY REACH THE VICINITY OF BASIN BY 645 PM. THIS LINE OF
STORMS WILL BE PACKING WIND WIND GUSTS OF 45 TO 55 MPH ALONG WITH
LOCALLY HEAVY RAINFALL AND FREQUENT DANGEROUS CLOUD TO GROUND
LIGHTNING. THE STRONGER STORM CELLS WILL LIKELY PRODUCE PEA SIZE
HAIL.

LIPSON
Special weather statement, Jun 26, 6:21 PM MDT, 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
621 PM MDT THU JUN 26 2014

WYZ005>009-011-017-270100-
BIGHORN MOUNTAINS SOUTHEAST WY-BIGHORN MOUNTAINS WEST WY-OWL CREEK
AND BRIDGER MOUNTAINS WY-SOUTHEAST BIG HORN BASIN WY-SOUTHEAST
JOHNSON COUNTY WY-SOUTHWEST BIG HORN BASIN WY-WIND RIVER BASIN WY-
621 PM MDT THU JUN 26 2014

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN JOHNSON...
SOUTHEASTERN WASHAKIE...EXTREME SOUTHEASTERN HOT SPRINGS...
NORTHWESTERN NATRONA AND NORTHEASTERN FREMONT COUNTIES UNTIL 700 PM
MDT...

AT 617 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR COTTONWOOD PASS...OR 34 MILES NORTHEAST OF
SHOSHONI...MOVING NORTHEAST AT 35 MPH.

WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH
HALF INCH DIAMETER HAIL...HEAVY RAIN AND FREQUENT DANGEROUS
LIGHTNING.

THIS STORM WILL BE NEAR...
BIG TRAILS AND STATE HWY 434 MILE MARKER 20 AROUND 655 PM MDT.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

BRIEF HEAVY RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES
AND UNDERPASSES...IS POSSIBLE. DO NOT DRIVE YOUR VEHICLE ON A
FLOODED ROADWAY.

THIS THUNDERSTORM HAS A GOOD CHANCE OF BECOMING SEVERE. STAY TUNED
FOR POSSIBLE SEVERE THUNDERSTORM WARNINGS FOR THIS STORM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT
THURSDAY EVENING FOR NORTH CENTRAL WYOMING.

REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
RIVERTON AT 1-800-211-1448.

LAT...LON 4396 10721 4352 10681 4332 10752 4346 10781
TIME...MOT...LOC 0019Z 222DEG 31KT 4349 10750

LIPSON
Special weather statement, Jun 26, 6:26 PM MDT, 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
626 PM MDT THU JUN 26 2014

WYZ026>029-270115-
FLAMING GORGE WY-ROCK SPRINGS AND GREEN RIVER WY-SOUTH LINCOLN COUNTY
WY-UPPER GREEN RIVER BASIN WY-
626 PM MDT THU JUN 26 2014

...SIGNIFICANT WEATHER ADVISORY FOR EXTREME SOUTHEASTERN LINCOLN AND
WESTERN SWEETWATER COUNTIES UNTIL 715 PM MDT...

AT 625 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR STATE HWY 372 MILE MARKER 10...OR 18 MILES
NORTHWEST OF GREEN RIVER...MOVING NORTH-NORTHEAST AT 25 MPH.

WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH
FREQUENT DANGEROUS LIGHTNING. BRIEF HEAVY RAIN IS ALSO POSSIBLE.

THIS STORM WILL IMPACT AREAS ALONG AND NEAR STATE HIGHWAY 372
BETWEEN GREEN RIVER AND THE INTERSECTION WITH STATE HIGHWAY 28.
OTHER STORMS WILL IMPACT US HIGHWAY 30 FROM GRANGER TO NEAR OPAL.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
RIVERTON AT 1-800-211-1448.

LAT...LON 4146 11005 4204 11004 4205 10946 4145 10957
TIME...MOT...LOC 0023Z 189DEG 21KT 4171 10973

JONES

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 26, 6:21 PM MDTSpecial Weather StatementRIWWashakie39 min
Jun 26, 6:26 PM MDTSpecial Weather StatementRIW49 min
Jun 26, 6:48 PM MDTFlash Flood WarningRIWWashakie102 min
Jun 26, 6:56 PM MDTSpecial Weather StatementRIWJohnson49 min
Jun 26, 7:08 PM MDTSpecial Weather StatementRIWSweetwater52 min
Jun 26, 7:19 PM MDTSpecial Weather StatementRIWJohnson56 min
Jun 26, 7:24 PM MDTSpecial Weather StatementRIWNatrona51 min
Jun 26, 7:45 PM MDTSevere Thunderstorm WarningRIWJohnson40 min
Jun 26, 7:56 PM MDTSpecial Weather StatementRIWSublette49 min
Jun 26, 8:13 PM MDTSpecial Weather StatementRIW47 min
Jun 26, 8:32 PM MDTSpecial Weather StatementRIWJohnson28 min
Jun 26, 9:38 PM MDTSpecial Weather StatementRIWFremont52 min
Jun 27, 12:28 PM MDTSpecial Weather StatementRIWFremont47 min
Jun 27, 12:53 PM MDTSpecial Weather StatementRIWJohnson52 min
Jun 27, 12:55 PM MDTSpecial Weather StatementRIWJohnson50 min
Jun 27, 1:28 PM MDTSpecial Weather StatementRIWJohnson47 min
Jun 27, 2:51 PM MDTSpecial Weather StatementRIWFremont39 min
Jun 27, 3:30 PM MDTSpecial Weather StatementRIWFremont45 min
Jun 27, 4:14 PM MDTSpecial Weather StatementRIWHot Springs46 min
Jun 27, 4:16 PM MDTSpecial Weather StatementRIWFremont44 min
Jun 27, 4:59 PM MDTSpecial Weather StatementRIWFremont46 min
Jun 27, 5:11 PM MDTSpecial Weather StatementRIW49 min
Jun 27, 5:32 PM MDTSpecial Weather StatementRIW43 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2014Every severe thunderstorm warning in 2014

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.