Alert archive / Wyoming / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 12, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at May 7, 2008, 7:17 PM MDT for Goshen County, Wyoming. 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 counties it named.
The facts
- Issued
- May 7, 2008, 7:17 PM MDT (01:17 UTC)
- Expired
- May 7, 2008, 8:00 PM MDT
- In force
- 43 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
County Goshen County, WY
The radar
The Cheyenne radar (KCYS), 111 km from the middle of the area, began a volume at 01:18 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 7, 12:52 PM MST | Tornado Watch | SPC | 146 days |
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 1.3 hours before the alert went out and 264 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
- 373 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1767 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 May 7, 6:52 PM MDT, 25 minutes earlier.
Area forecast discussion, May 7, 6:52 PM MDT, 25 minutes before
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</html>Hazardous weather outlook, May 7, 3:30 PM MDT, 3 hours 47 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 330 PM MDT WED MAY 7 2008 NEZ001>003-019>021-054-055-WYZ059>070-081600- SIOUX-DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL- CHEYENNE-CONVERSE-NIOBRARA-SOUTHWEST CARBON-NORTH CARBON- SNOWY RANGE-NORTH LARAMIE RANGE-LARAMIE VALLEY-LARAMIE RANGE- PLATTE-GOSHEN-CHEYENNE FOOTHILLS-PINE BLUFFS- 330 PM MDT WED MAY 7 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE AND SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON...MOST NUMEROUS ALONG A LOW LEVEL CONVERGENCE AXIS FROM BAGGS WYOMING TO DOUGLAS WYOMING. THUNDERSTORMS WILL MOVE NORTHEAST AT 20 MPH. SCATTERED THUNDERSTORMS WILL CONTINUE TONIGHT...MOST NUMEROUS NEAR SURFACE LOW PRESSURE ACROSS CONVERSE AND NIOBRARA COUNTIES. ALTHOUGH THE MAJORITY OF THE STRONGEST THUNDERSTORMS WILL PRODUCE SMALL HAIL AND WIND GUSTS TO 50 MPH...A FEW SEVERE THUNDERSTORMS WILL BE POSSIBLE PRODUCING LARGE HAIL AND DAMAGING WINDS. RAINFALL AMOUNTS WILL RANGE FROM ONE QUARTER TO ONE HALF INCH WITH LOCALIZED AMOUNTS OF ONE HALF INCH TO ONE INCH FROM THE STRONGER THUNDERSTORMS. SCATTERED THUNDERSTORMS WILL CONTINUE AFTER MIDNIGHT TONIGHT ACROSS THE WESTERN NEBRASKA PANHANDLE. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY ISOLATED AFTERNOON AND EVENING THUNDERSTORMS WILL OCCUR ON THURSDAY. WITH SCATTERED LATE DAY THUNDERSTORMS ON FRIDAY. LESS THUNDERSTORM COVERAGE IS EXPECTED DURING THE AFTERNOONS AND EVENINGS ON SATURDAY AND SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. AS ALWAYS... YOUR NATIONAL WEATHER SERVICE APPRECIATES ANY WEATHER REPORTS YOU CAN PROVIDE. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE RUBIN
In the hours before
Local storm report, May 7, 3:48 PM MDT, 3 hours 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
348 PM MDT WED MAY 07 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0348 PM HAIL 10 W GLENROCK 42.86N 106.07W
05/07/2008 E0.75 INCH CONVERSE WY LAW ENFORCEMENT
I-25 MM 175
&&Local storm report, May 7, 3:50 PM MDT, 3 hours 27 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
350 PM MDT WED MAY 07 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0348 PM HAIL 11 W GLENROCK 42.86N 106.07W
05/07/2008 E0.75 INCH NATRONA WY LAW ENFORCEMENT
I-25 MM 175
&&Local storm report, May 7, 4:12 PM MDT, 3 hours 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
412 PM MDT WED MAY 07 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0358 PM FUNNEL CLOUD 5 N GLENROCK 42.93N 105.86W
05/07/2008 CONVERSE WY LAW ENFORCEMENT
REPORTED BY FIRE CHIEF
0402 PM HAIL 3 SE GLENROCK 42.83N 105.82W
05/07/2008 E1.00 INCH CONVERSE WY BROADCAST MEDIA
I-25 MM160 NICKEL TO QUARTER HAIL
&&
JHOUSELocal storm report, May 7, 4:36 PM MDT, 2 hours 41 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
436 PM MDT WED MAY 07 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0415 PM HAIL 10 SE GLENROCK 42.75N 105.72W
05/07/2008 E1.00 INCH CONVERSE WY FIRE DEPT/RESCUE
&&Special weather statement, May 7, 6:05 PM MDT, 1 hour 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 605 PM MDT WED MAY 7 2008 NEZ001-019-WYZ060-067-068-080115- SIOUX-SCOTTS BLUFF-NIOBRARA-PLATTE-GOSHEN- INCLUDING THE CITIES OF...HARRISON...SCOTTSBLUFF...GERING... LUSK...WHEATLAND...GUERNSEY...TORRINGTON 605 PM MDT WED MAY 7 2008 AREAS OF LIGHT RAIN AND ISOLATED THUNDERSTORMS WILL CONTINUE TO MOVE TO THE EAST NORTHEAST THROUGH 7PM. WINDS GUSTING TO AROUND 40 MPH AND SMALL HAIL CAN BE EXPECTED WITH THE STORMS. RAINFALL ACCUMULATIONS SHOULD BE AROUND A TENTH OF AN INCH. GRIFFITH
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 6:39 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 36 min |
| May 7, 7:55 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 50 min |
| May 7, 8:43 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 44 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 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.