Alert archive / Wyoming / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 167, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 25, 2008, 5:01 PM MDT for Goshen County, Wyoming; Scotts Bluff County, Nebraska. It was in force for 59 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
- Aug 25, 2008, 5:01 PM MDT (23:01 UTC)
- Expired
- Aug 25, 2008, 6:00 PM MDT
- In force
- 59 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
Counties Scotts Bluff County, NE, Goshen County, WY
The radar
The Cheyenne radar (KCYS), 111 km from the middle of the area, began a volume at 23:01 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
Denver, CO (KDNR), launched 12:00Z, 11.0 hours before the alert went out and 243 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
- 2782 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 25, 3:10 PM MDT, 1 hour 51 minutes earlier.
Area forecast discussion, Aug 25, 3:10 PM MDT, 1 hour 51 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
310 PM MDT MON AUG 25 2008
.SHORT TERM...TONIGHT THROUGH TUESDAY NIGHT...TSTMS HAVE BEEN
DEVELOPING OVER THE MOUNTAINS AND ARE NOW SPREADING EAST ONTO
THE PLAINS. THIS IS IN AN AREA OF 1000-2000 J/KG CAPE AND -5
LIFTED INDEX PLUS GOOD DIRECTIONAL SHEAR FROM SSE. SMALL HAIL
AND LOCALLY HEAVY RAIN CONTINUE TO BE MAIN THREATS IN MARGINALLY
SEVERE ENVIRONMENT...WILL KEEP 20-30 PERCENT POPS TILL 9 PM.
AREAS OF FOG WILL LIKELY DEVELOP AGAIN LATE TONIGHT IN PARTS OF
NEBRASKA PAHANDLE. FORECAST FOR TUE STILL ON TRACK...UPPER
RIDGING OVER CWA WILL GIVE WAY TO INCREASING WESTERLY FLOW
ALOFT AS AN UPPER TROUGH SWEEPS ACROSS NORTHERN ROCKIES. WHILE
THE UPPER DYNAMICS WILL STAY WELL NORTH OF US...THE ASSOCIATED
COLD FRONT WILL LIKELY AID IN SOME TSTMS TUE AFTERNOON/EVENING
OVER ROUGHLY THE SOUTHEAST HALF OF THE CWA. FRONT TIMES INTO
NORTHERN CWA LATE TUE MORNING AND FAR SOUTHERN CWA TUE EVENING.
MAX TEMPS TUE WILL STILL BE WARM AGAIN AHEAD OF THE FRONT.
.LONG TERM...WED THRU MON...A DRY NW OR WNW FLOW ALOFT SETS UP OVER
THE REGION THRU FRI NIGHT. A SERIES OF WEAK UPPER FEATURES RIPPLE
SEWD ACROSS MT INTO THE NRN PLAINS...WITH THE STRONGEST ONE THUR
NIGHT WHICH HELPS DRIVE A SECONDARY COOL FRONT THRU THE REGION. THE
COOLEST DAY LOOKS TO BE ON FRI. GOING INTO NEXT WEEKEND...A FLAT
UPPER RIDGE SHIFTS OVER THE AREA SAT WHICH SHOULD STILL KEEP US DRY
BUT WITH THE START OF A WARMING TREND. UPPER RIDGE SHIFTS E SUN
INTO MON WITH THE FLOW ALOFT BECOMING SW AHEAD OF A PAC COAST UPPER
TROF. THIS SHOULD START PULLING A DECENT SHOT OF MONSOON MSTR NEWD
INTO THE REGION...WITH LATE DAY TSTMS BECMG POSSIBLE BY SUN NIGHT
INTO MON. TEMPS ALSO REBOUND TO MORE SUMMERLIKE SUN AND MON. ECMWF
FROM 00Z RUN PRETTY MUCH SUPPORTS 12Z GFS WITH MOST FEATURES IN THE
LATER PERIODS.
&&
.AVIATION...A FEW OF THE TSTMS THROUGH EARLY THIS EVENING MAINLY
EAST OF MOUNTAINS MAY PRODUCE BRIEF MVFR CEILINGS AND VISIBILITIES.
AREAS OF IFR CEILINGS AND REDUCED VISIBILITIES ARE LIKELY AGAIN IN
PARTS OF THE PANHANDLE LATER TONIGHT INTO MID MORNING TUESDAY.
A COLD FRONT WILL MOVE ACROSS CWA TUESDAY AFTERNOON AND EVENING.
SOUTH WINDS WILL GUST TO 30 KNOTS AHEAD OF THE FRONT...WITH WINDS
SHIFTING TO THE NORTHWEST AFTER ITS PASSAGE.
&&
.FIRE WEATHER...WILL KEEP THE RED FLAG WARNING FOR CARBON COUNTY
INTO EARLY THIS EVENING ALTHOUGH WINDS SOMEWHAT MARGINAL. HAVE
ALSO OPTED TO ISSUE A FIRE WEATHER WATCH FOR CARBON AND ALBANY
COUNTIES AND THE NORTHERN LARAMIE RANGE FOR TUE AFTERNOON AS
SURFACE PRESSURE GRADIENT WILL INCREASE AHEAD OF COLD FRONT...AND
IT WILL AGAIN BE VERY WARM AND DRY AND BREEZIER THAN TODAY.
&&
.CYS WATCHES/WARNINGS/ADVISORIES...
WY...RED FLAG WARNING LOWER ELEVATIONS OF CARBON COUNTY UNTIL 7 PM
THIS EVENING FOR FIRE WEATHER ZONE 293.
FIRE WEATHER WATCH FROM NOON TO 7 PM TUESDAY FOR FIRE WEATHER
ZONES 292...293...294.
NE...NONE.
&&Hazardous weather outlook, Aug 25, 10:55 AM MDT, 6 hours 6 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1055 AM MDT MON AUG 25 2008 NEZ001>003-019>021-054-055-WYZ060-063-065-066-068>070-261145- SIOUX-DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL- CHEYENNE-SNOWY RANGE-LARAMIE VALLEY-LARAMIE RANGE-NIOBRARA- GOSHEN-CHEYENNE FOOTHILLS-PINE BLUFFS- 1055 AM MDT MON AUG 25 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE AND SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT A SCATTERED COVERAGE OF THUNDERSTORMS WILL DEVELOP OVER THE LARAMIE RANGE AND SNOWY RANGE EARLY THIS AFTERNOON. THE STORMS WILL MOVE SLOWLY EAST SOUTHEAST ONTO THE LOWER ELEVATIONS OF SOUTHEAST WYOMING THROUGH THE AFTERNOON...AND THEN INTO MUCH OF THE WESTERN NEBRASKA PANHANDLE THROUGH EVENING. A FEW OF THE STORMS OVER EXTREME SOUTHEAST WYOMING AND IN THE PANHANDLE WILL BECOME STRONG PRODUCING SMALL HAIL...WIND GUSTS TO 50 MPH AND LOCALLY HEAVY RAIN. SOUTH WINDS OVER THE PANHANDLE WILL ALSO INCREASE THIS AFTERNOON AND TONIGHT WITH GUSTS TO 30 MPH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY GUSTY SOUTH WINDS WILL SHIFT TO THE NORTHWEST LATE TUESDAY AFTERNOON AND EVENING. A FEW NON-SEVERE THUNDERSTORMS WILL DEVELOP OVER THE REGION TUESDAY AFTERNOON AND EARLY EVENING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING MAINLY OVER THE WESTERN NEBRASKA PANHANDLE AS WELL AS FOR PARTS OF NIOBRARA...GOSHEN AND LARAMIE COUNTIES IN SOUTHEAST WYOMING. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE WYZ059-064-067-261145- CONVERSE-NORTH LARAMIE RANGE-PLATTE- 1055 AM MDT MON AUG 25 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY GUSTY SOUTH WINDS WILL SHIFT TO THE NORTHWEST TUESDAY AFTERNOON. ISOLATED NON-SEVERE THUNDERSTORMS WILL DEVELOP TUESDAY AFTERNOON AND EARLY EVENING. .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 WYZ061-062-261145- SOUTHWEST CARBON-NORTH CARBON- 1055 AM MDT MON AUG 25 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT A RED FLAG WARNING IS IN EFFECT FOR THE LOWER ELEVATIONS OF CARBON COUNTY THIS AFTERNOON AND EARLY EVENING. HIGH TEMPERATURES BETWEEN 85 AND 90 AND LOW RELATIVE HUMIDITIES FROM 10 TO 15 PERCENT WILL COMBINE WITH GUSTY SOUTHWEST WINDS OF 15 TO 25 MPH TO CAUSE INCREASED FIRE DANGER POTENTIAL. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY GUSTY SOUTHWEST WINDS WILL SHIFT TO THE WEST OR NORTHWEST TUESDAY AFTERNOON. CONDITIONS WILL STILL BE VERY WARM...DRY AND BREEZY OVER THE AREA TUESDAY AFTERNOON AND EARLY EVENING AND CRITICAL FIRE WEATHER CONDITIONS MAY BE REACHED AGAIN. .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
In the hours before
Special weather statement, Aug 25, 2:44 PM MDT, 2 hours 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 244 PM MDT MON AUG 25 2008 WYZ063>067-069-252145- SNOWY RANGE-NORTH LARAMIE RANGE-LARAMIE VALLEY-LARAMIE RANGE- PLATTE-CHEYENNE FOOTHILLS- INCLUDING THE CITIES OF...CENTENNIAL...GARRETT...LARAMIE... BUFORD...HORSE CREEK...WHEATLAND...GUERNSEY...CHEYENNE 244 PM MDT MON AUG 25 2008 ...THUNDERSTORMS SPREADING OVER PARTS OF SOUTHEAST WYOMING... THUNDERSTORMS HAVE BEEN DEVELOPING SINCE EARLY THIS AFTERNOON OVER AND JUST EAST OF THE MOUNTAINS OF SOUTHEAST WYOMING. AS OF 235 PM MDT...THERE WAS A SCATTERED COVERAGE OF STORMS MAINLY IN AN AREA FROM DOUGLAS TO NEAR CHEYENNE AND THEN WEST TO CENTENNIAL...WITH THE STRONGEST STORMS ABOUT 12 MILES NORTHWEST OF CHEYENNE. THUNDERSTORMS WILL CONTINUE OVER SOUTHEAST WYOMING THROUGH THE AFTERNOON AND EARLY EVENING. GUSTY WINDS NEAR 50 MPH...SMALL HAIL AND LOCALLY HEAVY RAIN CAN BE EXPECTED WITH THE STRONGER STORMS AS THEY MOVE EAST OR EAST/SOUTHEAST AT 15 MPH. JLH
Local storm report, Aug 25, 2:55 PM MDT, 2 hours 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
255 PM MDT MON AUG 25 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0253 PM HAIL 12 N CHEYENNE 41.32N 104.79W
08/25/2008 E0.50 INCH LARAMIE WY TRAINED SPOTTER
&&
BCHAPMANSpecial weather statement, Aug 25, 3:41 PM MDT, 1 hour 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 341 PM MDT MON AUG 25 2008 WYZ069-070-252300- CHEYENNE FOOTHILLS-PINE BLUFFS- INCLUDING THE CITIES OF...CHEYENNE...PINE BLUFFS 341 PM MDT MON AUG 25 2008 ...STRONG THUNDERSTORM MOVING EAST THROUGH CENTRAL AND EASTERN LARAMIE COUNTY... A STRONG THUNDERSTORM LOCATED 15 MILES NORTHEAST OF CHEYENNE WILL CONTINUE TO MOVE EAST AT 20 MPH THROUGH 5 PM. THIS THUNDERSTORM WILL AFFECT RURAL AREAS NORTH OF INTERSTATE 80. DEADLY CLOUD TO GROUND LIGHTNING...HAIL UP TO THE SIZE OF DIMES...AND BRIEF WINDS GUSTS TO 40 MPH WILL BE POSSIBLE WITH THIS THUNDERSTORM. HAHN
Special weather statement, Aug 25, 4:42 PM MDT, 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 442 PM MDT MON AUG 25 2008 WYZ066-068>070-260000- LARAMIE RANGE-GOSHEN-CHEYENNE FOOTHILLS-PINE BLUFFS- INCLUDING THE CITIES OF...BUFORD...HORSE CREEK...TORRINGTON... CHEYENNE...PINE BLUFFS 442 PM MDT MON AUG 25 2008 ...SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP THROUGH EARLY EVENING... SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP AND MOVE EAST AT 20 MPH ACROSS SOUTHEAST WYOMING THROUGH 6 PM. AT 445 PM...THE STRONGEST THUNDERSTORMS WERE FORMING IN SOUTHERN GOSHEN COUNTY...MAINLY WEST OF HIGHWAY 85. DEADLY CLOUD TO GROUND LIGHTNING...HAIL UP TO THE SIZE OF DIMES...AND BRIEF WIND GUSTS TO 40 MPH WILL BE POSSIBLE WITHIN THESE THUNDERSTORMS. HAHN
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 4:56 AM MDT | Red Flag Warning | CYS | 14 hr | |
| Aug 24, 10:07 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes | 42 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2008Severe Thunderstorm Warnings in Nebraska, 2008Every severe thunderstorm warning in 2008
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.