Alert archive / Wyoming / Special Weather Statements in 2011
Special Weather Statement, NWS Riverton, WY
NWS Riverton, WY issued this special weather statement at Aug 8, 2011, 3:17 PM MDT. It was in force for 43 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
- Aug 8, 2011, 3:17 PM MDT (21:17 UTC)
- Expired
- Aug 8, 2011, 4:00 PM MDT
- In force
- 43 min
- Issued by
- NWS Riverton, WY
The radar
The Riverton/Lander radar (KRIW), 93 km from the middle of the area, began a volume at 21:18 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, 9.3 hours before the alert went out and 87 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2419 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>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 Aug 8, 2:36 AM MDT, 12 hours 41 minutes earlier.
Area forecast discussion, Aug 8, 2:36 AM MDT, 12 hours 41 minutes before
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</html>Hazardous weather outlook, Aug 8, 4:00 AM MDT, 11 hours 17 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 400 AM MDT MON AUG 8 2011 WYZ001>020-022>030-091200- 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- 400 AM MDT MON AUG 8 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED AFTERNOON AND EVENING THUNDERSTORMS ARE EXPECTED ACROSS NORTHERN AND CENTRAL WYOMING AND THE FAR WEST. LIGHTNING AND GUSTY WINDS WILL BE THE PRIMARY HAZARDS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE CHANCE OF THUNDERSTORMS REMAINS OVER THE NORTH AND CENTRAL TUESDAY AND WEDNESDAY. ON THURSDAY THUNDERSTORM ACTIVITY WILL OCCUR OVER THE NORTH ALONG AND AHEAD OF A COLD FRONT. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ASKED TO REPORT HAIL SIZE AND STRONG WIND GUSTS AS WELL AS ANY DAMAGE. THANK YOU. TEAM RIVERTON
In the hours before
Special weather statement, Aug 8, 1:11 PM MDT, 2 hours 6 minutes before
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</html>Special weather statement, Aug 8, 1:47 PM MDT, 1 hour 30 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 147 PM MDT MON AUG 8 2011 WYZ007-017-082030- OWL CREEK AND BRIDGER MOUNTAINS WY-WIND RIVER BASIN WY- 147 PM MDT MON AUG 8 2011 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN HOT SPRINGS AND NORTHERN FREMONT COUNTIES UNTIL 230 PM MDT... AT 142 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 15 MILES SOUTH OF HWY JCT 170 AND 174...OR 22 MILES SOUTHWEST OF THERMOPOLIS...MOVING EAST AT 30 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING. MOVE INDOORS IF THIS STORM APPROACHES YOUR LOCATION. THIS STORM WILL BE NEAR... U.S. HWY 20/789 MILE MARKER 120 AROUND 220 PM MDT. BOYSEN STATE PARK HEADQUARTERS AROUND 225 PM MDT. 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. REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN RIVERTON AT 1-800-211-1448. LAT...LON 4349 10813 4329 10813 4342 10875 4361 10866 TIME...MOT...LOC 1946Z 288DEG 28KT 4349 10857 LYNOTT
Special weather statement, Aug 8, 1:59 PM MDT, 1 hour 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 159 PM MDT MON AUG 8 2011 WYZ003>005-007-082030- CODY FOOTHILLS WY-NORTH BIG HORN BASIN WY-OWL CREEK AND BRIDGER MOUNTAINS WY-SOUTHWEST BIG HORN BASIN WY- 159 PM MDT MON AUG 8 2011 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN HOT SPRINGS AND SOUTHEASTERN PARK COUNTIES UNTIL 230 PM MDT... AT 155 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR STATE HWY 120 MILE MARKER 50...OR 5 MILES SOUTH OF MEETEETSE...MOVING EAST AT 25 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND DANGEROUS LIGHTNING. THIS STORM WILL BE NEAR... STATE HWY 120 MILE MARKER 40 AROUND 215 PM MDT. GOOSEBERRY CREEK AROUND 220 PM MDT. STATE HWY 431 MILE MARKER 30 AND HWY JCT 431 AND 120 AROUND 230 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 ALSO LIKELY. 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 4415 10856 4392 10856 4401 10900 4419 10894 TIME...MOT...LOC 1959Z 284DEG 22KT 4407 10884 WOLCOTT
Special weather statement, Aug 8, 2:31 PM MDT, 46 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 231 PM MDT MON AUG 8 2011 WYZ007-008-017-020-082115- BIGHORN MOUNTAINS WEST WY-NATRONA COUNTY LOWER ELEVATIONS WY-OWL CREEK AND BRIDGER MOUNTAINS WY-WIND RIVER BASIN WY- 231 PM MDT MON AUG 8 2011 ...SIGNIFICANT WEATHER ADVISORY FOR EXTREME SOUTHERN WASHAKIE... SOUTHEASTERN HOT SPRINGS...NORTHWESTERN NATRONA AND EASTERN FREMONT COUNTIES UNTIL 315 PM MDT... AT 227 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 10 MILES NORTHEAST OF U.S. HWY 20/789 MILE MARKER 110...OR 16 MILES NORTHEAST OF SHOSHONI...MOVING EAST AT 35 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING. BRIEF HEAVY RAIN CAN ALSO BE EXPECTED NEAR THE OWL CREEK MOUNTAINS. THIS STORM WILL BE NEAR... KIRBY CREEK RD AROUND 240 PM MDT. LOST CABIN AROUND 255 PM MDT. LOST CABIN GAS PLANT AROUND 300 PM MDT. REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN RIVERTON AT 1-800-211-1448. LAT...LON 4350 10745 4322 10742 4337 10808 4354 10800 TIME...MOT...LOC 2030Z 288DEG 33KT 4343 10792 LYNOTT
Special weather statement, Aug 8, 2:36 PM MDT, 41 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RIVERTON WY 236 PM MDT MON AUG 8 2011 WYZ011-082100- SOUTHEAST JOHNSON COUNTY WY- 236 PM MDT MON AUG 8 2011 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN JOHNSON COUNTY UNTIL 300 PM MDT... AT 232 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR SUSSEX...OR 14 MILES EAST OF KAYCEE...MOVING SOUTHEAST AT 30 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING BEFORE IT EXITS SOUTHERN JOHNSON COUNTY. THIS STORM WILL BE NEAR... LINCH AND STATE HWY 192 MILE MARKER 30 AROUND 250 PM MDT. BRIEF HEAVY RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. 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 4379 10603 4350 10603 4359 10651 4379 10640 TIME...MOT...LOC 2036Z 297DEG 29KT 4366 10633 LYNOTT
Special weather statement, Aug 8, 3:17 PM MDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
317 PM MDT MON AUG 8 2011
WYZ007>009-017-020-082200-
BIGHORN MOUNTAINS SOUTHEAST WY-BIGHORN MOUNTAINS WEST WY-NATRONA
COUNTY LOWER ELEVATIONS WY-OWL CREEK AND BRIDGER MOUNTAINS WY-WIND
RIVER BASIN WY-
317 PM MDT MON AUG 8 2011
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN NATRONA AND EXTREME
EASTERN FREMONT COUNTIES UNTIL 400 PM MDT...
AT 314 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 6 MILES SOUTHWEST OF COTTONWOOD PASS...OR 26
MILES NORTHEAST OF SHOSHONI...MOVING EAST AT 25 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.
THIS STORM WILL BE NEAR...
RURAL NORTHWESTERN NATRONA COUNTY THROUGH 400 PM MDT
RURAL EASTERN FREMONT COUNTY THROUGH 400 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 ALSO LIKELY. 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 4346 10742 4346 10715 4318 10714 4333 10770
4345 10772
TIME...MOT...LOC 2117Z 284DEG 22KT 4339 10762
WOLCOTTThe office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 6:07 PM MDT | Special Weather Statement | RIW | 38 min | |
| Aug 7, 6:16 PM MDT | Special Weather Statement | RIW | Teton | 44 min |
| Aug 8, 1:07 PM MDT | Special Weather Statement | RIW | 38 min | |
| Aug 8, 1:47 PM MDT | Special Weather Statement | RIW | Hot Springs | 43 min |
| Aug 8, 1:59 PM MDT | Special Weather Statement | RIW | Hot Springs | 31 min |
| Aug 8, 2:31 PM MDT | Special Weather Statement | RIW | 44 min | |
| Aug 8, 2:36 PM MDT | Special Weather Statement | RIW | Johnson | 24 min |
| Aug 8, 3:08 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 22 min |
| Aug 8, 3:27 PM MDT | Special Weather Statement | RIW | Hot Springs | 33 min |
| Aug 8, 3:37 PM MDT | Special Weather Statement | RIW | Big Horn | 38 min |
| Aug 8, 4:01 PM MDT | Special Weather Statement | RIW | Hot Springs | 44 min |
| Aug 8, 4:22 PM MDT | Special Weather Statement | RIW | Big Horn | 38 min |
| Aug 8, 4:51 PM MDT | Special Weather Statement | RIW | Washakie | 24 min |
| Aug 8, 5:56 PM MDT | Special Weather Statement | RIW | Natrona | 49 min |
Nearby
Special Weather Statements in Wyoming, 2011Every special weather statement in 2011
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.