Alert archive / Wyoming / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 93, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 3, 1997, 3:32 PM MDT for Albany 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
- Aug 3, 1997, 3:32 PM MDT (21:32 UTC)
- Expired
- Aug 3, 1997, 4:15 PM MDT
- In force
- 43 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Albany County, WY
The radar
The Cheyenne radar (KCYS), 95 km from the middle of the area, began a volume at 21:34 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, 9.5 hours before the alert went out and 270 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
- 42 J/kg
- Mixed-layer CIN
- -384 J/kg
- Mixed-layer LCL
- 1960 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 032132 SVRCYS WYC001-032215- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 332 PM MDT SUN AUG 3 1997 * SEVERE THUNDERSTORM WARNING FOR CENTRAL ALBANY COUNTY IN SOUTHEASTERN WYOMING * UNTIL 415 PM MDT * SOME LOCATIONS AFFECTED ROCK RIVER 332 * AT 332 PM DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM JUST TO THE EAST OF ROCK RIVER. HAIL IN EXCESS OF 1 INCH IN POSSIBLE WITH THIS STORM. MOV:EMENT WAS SOUTHEAST AT 15 MPH. SEEK SHELTER INSIDE A STURDY BUILDING AND STAY AWAY FROM ALL WINDOWS UNTIL THE STORM PASSES. & WCJIN-WYSE DMM
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.
In the hours before
Special weather statement, Aug 3, 10:04 AM MDT, 5 hours 28 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-040000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1002 AM MDT SAT AUG 2 1997 THE SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA IS LOW TODAY. SPOTTER ACTIVATION WILL NOT BE NECESSARY. DISCUSSION...EVEN THOUGH THE AIR MASS IS GENERALLY DRIER THAN SATURDAY WIDELY SCATTERED THUNDERSTORMS WILL DEVELOP AFTER 200 PM OVER THE AREA. THE COVERAGE OF STORMS WILL BE LESS THAN OnN SATURDAY...BUT A FEW OF THEM COULD BECOME STRONG WITH HEAVY RAIN AND HAIL DUE TO A LOW LEVEL UPSLOPE WIND FLOW. ANY STORMS WILL MOVE SLWOLY SOUTHEAST THIS AFTERNOON. WCJIN-WYSE-WYNE WEILAND
Special weather statement, Aug 3, 10:20 AM MDT, 5 hours 12 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-040000- SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE CHEYENNE WY 1020 AM MDT SUN AUG 3 1997 THE SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA IS LOW TODAY. SPOTTER ACTIVATION WILL NOT BE NECESSARY. DISCUSSION...EVEN THOUGH THE AIR MASS IS GENERALLY DRIER THAN SATURDAY WIDELY SCATTERED THUNDERSTORMS WILL DEVELOP AFTER 200 PM OVER THE AREA. THE COVERAGE OF STORMS WILL BE LESS THAN ON SATURDAY...BUT A FEW OF THEM COULD BECOME STRONG WITH HEAVY RAIN AND HAIL DUE TO A LOW LEVEL UPSLOPE WIND FLOW. ANY STORMS WILL MOVE SLWOLY SOUTHEAST THIS AFTERNOON. WCJIN-WYSE-WYNE WEILAND
Special weather statement, Aug 3, 10:21 AM MDT, 5 hours 11 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-040000- SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE CHEYENNE WY 1020 AM MDT SUN AUG 3 1997 THE SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA IS LOW TODAY. SPOTTER ACTIVATION WILL NOT BE NECESSARY. DISCUSSION...EVEN THOUGH THE AIR MASS IS GENERALLY DRIER THAN SATURDAY WIDELY SCATTERED THUNDERSTORMS WILL DEVELOP AFTER 200 PM OVER THE AREA. THE COVERAGE OF STORMS WILL BE LESS THAN ON SATURDAY...BUT A FEW OF THEM COULD BECOME STRONG WITH HEAVY RAIN AND HAIL DUE TO A LOW LEVEL UPSLOPE WIND FLOW. ANY STORMS WILL MOVE SLWOLY SOUTHEAST THIS AFTERNOON. WCJIN-WYSE-WYNE WEILAND
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 7:57 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 33 min |
| Aug 3, 2:38 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 42 min |
| Aug 3, 3:24 PM MDT | Severe Thunderstorm Warning | CYS | Albany | 41 min |
| Aug 3, 4:00 PM MDT | Tornado Warning | CYS | Laramie | 45 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 1997Every severe thunderstorm warning in 1997
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.