Alert archive / Wyoming / Special Weather Statements in 2012
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Jul 1, 2012, 4:33 PM MDT for Niobrara County, Wyoming. It was in force for 27 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
- Jul 1, 2012, 4:33 PM MDT (22:33 UTC)
- Expired
- Jul 1, 2012, 5:00 PM MDT
- In force
- 27 min
- Issued by
- NWS Cheyenne, WY
County Niobrara County, WY
The radar
The Rapid City radar (KUDX), 140 km from the middle of the area, began a volume at 22:35 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
Rapid City, SD (KUNR), launched 12:00Z, 10.6 hours before the alert went out and 133 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
- 979 J/kg
- Mixed-layer CIN
- -306 J/kg
- Mixed-layer LCL
- 1390 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -63 m²/s²
- 0-3 km storm-relative helicity
- -81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 Jul 1, 4:21 PM MDT, 12 minutes earlier.
Area forecast discussion, Jul 1, 4:21 PM MDT, 12 minutes before
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</html>Hazardous weather outlook, Jul 1, 1:40 PM MDT, 2 hours 53 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 140 PM MDT SUN JUL 1 2012 NEZ002-003-019>021-054-055-095-096-WYZ101-102-107-108-118-119- 021100- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX-CONVERSE COUNTY LOWER ELEVATIONS- NIOBRARA COUNTY-EAST PLATTE COUNTY-GOSHEN COUNTY- CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY- 140 PM MDT SUN JUL 1 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE...SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT ISOLATED THUNDERSTORMS ARE POSSIBLE ACROSS SOUTHEAST WYOMING THE WESTERN NEBRASKA PANHANDLE THIS AFTERNOON. A FEW THUNDERSTORMS MAY PRODUCE SMALL HAIL AND GUSTY WINDS. SEVERE THUNDERSTORMS ARE NOT EXPECTED. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY ISOLATED LATE DAY THUNDERSTORMS ARE POSSIBLE MONDAY AND TUESDAY. BETTER CHANCES FOR SHOWERS AND THUNDERSTORMS SHOULD ARRIVE FOR FRIDAY AND SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE WYZ103>106-109>117-021100- NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS- SHIRLEY BASIN-CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE 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- 140 PM MDT SUN JUL 1 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL WYOMING... SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT VERY WARM AND DRY AIR WILL COMBINE WITH DRY FUELS AND LOCALLY GUSTY WINDS TO PRODUCE POTENTIALLY RAPID FIRE SPREAD CONDITIONS THIS AFTERNOON AND EVENING. ISOLATED THUNDERSTORMS ARE POSSIBLE MAINLY THIS AFTERNOON AND EVENING. STRONG WIND GUSTS ARE POSSIBLE WITH A FEW THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY ISOLATED LATE DAY THUNDERSTORMS ARE POSSIBLE MONDAY. A BETTER CHANCE FOR SHOWERS AND THUNDERSTORMS IS EXPECTED BY LATE IN THE WEEK AS MONSOONAL MOISTURE INCREASES OVER THE REGION. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE LIEBL
In the hours before
Special weather statement, Jul 1, 3:26 PM MDT, 1 hour 7 minutes before
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</html>Local storm report, Jul 1, 4:16 PM MDT, 17 minutes before
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</html>Local storm report, Jul 1, 4:27 PM MDT, 6 minutes before
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</html>Special weather statement, Jul 1, 4:33 PM MDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
433 PM MDT SUN JUL 1 2012
WYZ102-012300-
NIOBRARA COUNTY WY-
433 PM MDT SUN JUL 1 2012
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN NIOBRARA COUNTY
UNTIL 500 PM MDT...
AT 429 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 7 MILES WEST OF REDBIRD...OR 30 MILES WEST OF
EDGEMONT...MOVING NORTHEAST AT 20 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.
LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
REDBIRD...
MULE CREEK JUNCTION...
TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.
&&
LAT...LON 4350 10404 4321 10404 4303 10444 4325 10462
4351 10422 4351 10406
TIME...MOT...LOC 2233Z 239DEG 18KT 4322 10438
FINCHThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 2:53 PM MDT | Red Flag Warning | CYS | 29 hr | |
| Jul 1, 5:00 PM MDT | Special Weather Statement | CYS | Niobrara | 30 min |
| Jul 1, 3:15 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 45 min |
| Jul 1, 3:45 PM MDT | Special Weather Statement | CYS | Banner | 45 min |
| Jul 1, 4:08 PM MDT | Special Weather Statement | CYS | Cheyenne | 52 min |
| Jul 1, 5:47 PM MDT | Special Weather Statement | CYS | Kimball | 43 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.