Alert archive / Wyoming / Special Weather Statements in 2012
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Aug 11, 2012, 3:46 PM MDT for Laramie County, Wyoming. It was in force for 29 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 11, 2012, 3:46 PM MDT (21:46 UTC)
- Expired
- Aug 11, 2012, 4:15 PM MDT
- In force
- 29 min
- Issued by
- NWS Cheyenne, WY
County Laramie County, WY
The radar
The Cheyenne radar (KCYS), 48 km from the middle of the area, began a volume at 21:48 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, 9.8 hours before the alert went out and 321 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
- 90 J/kg
- Mixed-layer CIN
- -235 J/kg
- Mixed-layer LCL
- 1679 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 86 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 Cheyenne, WY wrote its last area forecast discussion before this special weather statement went out at Aug 11, 3:38 PM MDT, 8 minutes earlier.
Area forecast discussion, Aug 11, 3:38 PM MDT, 8 minutes before
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</html>Hazardous weather outlook, Aug 11, 1:15 PM MDT, 2 hours 31 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE CHEYENNE WY 115 PM MDT SAT AUG 11 2012 WYZ101>119-121730- CONVERSE COUNTY LOWER ELEVATIONS-NIOBRARA COUNTY- NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS- SHIRLEY BASIN-CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- EAST PLATTE COUNTY-GOSHEN COUNTY-CENTRAL CARBON COUNTY- NORTH SNOWY RANGE FOOTHILLS-SOUTHWEST CARBON COUNTY- SIERRA MADRE RANGE-UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE- LARAMIE VALLEY-SOUTH LARAMIE RANGE-SOUTH LARAMIE RANGE FOOTHILLS- CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY- 1127 AM MDT SAT AUG 11 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL WYOMING... SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP AND MOVE WEST TO EAST THIS AFTERNOON AS A COLD FRONT AND UPPER LEVEL WEATHER DISTURBANCE PASS THROUGH THE REGION. NONE OF THE THUNDERSTORMS ARE EXPECTED TO PRODUCE SEVERE WEATHER. GUSTY NORTHWEST WINDS OF 25 TO 35 MPH WILL OCCUR IN THE WAKE OF THE FRONTAL PASSAGE...WITH GUSTS OF 40 TO 50 MPH IN AND NEAR SOME OF THE SHOWERS AND THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY WIDELY SCATTERED MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS WILL DEVELOP MONDAY AND TUESDAY. A COLD FRONT DROPPING SOUTH THROUGH THE AREA ON WEDNESDAY WILL BRING SCATTERED SHOWERS AND THUNDERSTORMS WEDNESDAY AND THURSDAY. NONE OF THE THUNDERSTORMS ARE EXPECTED TO PRODUCE SEVERE WEATHER BUT GUSTY WINDS AT TIMES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THIS AFTERNOON AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ002-003-019>021-054-055-095-096-121730- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX- 115 PM MDT SAT AUG 11 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP DURING THE AFTERNOON AND LINGER INTO THE EARLY EVENING HOURS AS A COLD FRONT AND UPPER LEVEL WEATHER DISTURBANCE MOVE THROUGH THE REGION. GUSTY NORTHWEST WINDS OF 25 TO 35 MPH WILL OCCUR IN THE WAKE OF THE FRONTAL PASSAGE. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY WIDELY SCATTERED MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS WILL DEVELOP WEDNESDAY AND THURSDAY. NONE OF THE STORMS ARE EXPECTED TO PRODUCE SEVERE WEATHER BUT GUSTY WINDS AT TIMES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THIS AFTERNOON AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE JAMSKI
In the hours before
Special weather statement, Aug 11, 1:35 PM MDT, 2 hours 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 135 PM MDT SAT AUG 11 2012 WYZ104-109-110-112015- CENTRAL CARBON COUNTY WY-FERRIS/SEMINOE/SHIRLEY MOUNTAINS WY-NORTH SNOWY RANGE FOOTHILLS WY- 135 PM MDT SAT AUG 11 2012 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CARBON COUNTY UNTIL 215 PM MDT... AT 124 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 6 MILES NORTH OF SEPARATION LAKE...OR 20 MILES NORTH OF RAWLINS...MOVING EAST-SOUTHEAST AT 30 MPH. PEA SIZE HAIL AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. THIS STORM WILL BE NEAR... RURAL CENTRAL CARBON COUNTY THROUGH 215 PM MDT IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. && LAT...LON 4208 10659 4177 10677 4200 10730 4218 10721 TIME...MOT...LOC 1935Z 292DEG 25KT 4204 10714 JAMSKI
Special weather statement, Aug 11, 2:06 PM MDT, 1 hour 40 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 206 PM MDT SAT AUG 11 2012 WYZ101-103-112100- CONVERSE COUNTY LOWER ELEVATIONS WY-NORTH LARAMIE RANGE WY- 206 PM MDT SAT AUG 11 2012 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CONVERSE COUNTY UNTIL 300 PM MDT... AT 204 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 8 MILES SOUTHWEST OF GLENROCK...OR 17 MILES SOUTHEAST OF EVANSVILLE...MOVING EAST AT 30 MPH. HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... DOUGLAS... ROLLING HILLS ESTATES... GLENROCK... DEER CREEK... BOXELDER... LAPRELE RESERVOIR... THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 133 AND 172. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. && LAT...LON 4283 10526 4239 10542 4269 10605 4293 10601 TIME...MOT...LOC 2006Z 291DEG 28KT 4277 10593 CLAYCOMB
Special weather statement, Aug 11, 3:16 PM MDT, 30 minutes before
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</html>Special weather statement, Aug 11, 3:33 PM MDT, 13 minutes before
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</html>Local storm report, Aug 11, 3:36 PM MDT, 10 minutes before
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</html>Special weather statement, Aug 11, 3:46 PM MDT, 0 minutes before
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</html>The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 1:35 PM MDT | Special Weather Statement | CYS | Carbon | 40 min |
| Aug 11, 2:06 PM MDT | Special Weather Statement | CYS | Converse | 54 min |
| Aug 11, 3:16 PM MDT | Special Weather Statement | CYS | Platte | 59 min |
| Aug 11, 3:33 PM MDT | Special Weather Statement | CYS | Laramie | 57 min |
| Aug 11, 4:12 PM MDT | Special Weather Statement | CYS | Laramie | 33 min |
| Aug 11, 4:13 PM MDT | Special Weather Statement | CYS | Laramie | 1 min |
| Aug 11, 4:27 PM MDT | Special Weather Statement | CYS | Albany | 33 min |
| Aug 11, 4:49 PM MDT | Special Weather Statement | CYS | Goshen | 41 min |
| Aug 11, 5:04 PM MDT | Special Weather Statement | CYS | Cheyenne, Kimball | 41 min |
| Aug 11, 5:22 PM MDT | Special Weather Statement | CYS | Morrill | 38 min |
| Aug 11, 5:52 PM MDT | Special Weather Statement | CYS | Morrill | 23 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.