Alert archive / Wyoming / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 33, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 14, 1997, 3:25 PM MDT for Converse County, Wyoming. It was in force for 45 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
- Jun 14, 1997, 3:25 PM MDT (21:25 UTC)
- Expired
- Jun 14, 1997, 4:10 PM MDT
- In force
- 45 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Converse County, WY
The radar
The Cheyenne radar (KCYS), 210 km from the middle of the area, began a volume at 21:29 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, 9.4 hours before the alert went out and 235 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
- 1028 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 142123 RRA SVRCYS WYC009-142210- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 325 PM MDT SAT JUN 14 1997 * SEVERE THUNDERSTORM WARNING FOR SOUTHERN CONVERSE COUNTY IN EAST CENTRAL WYOMING * UNTIL 410 PM MDT * SOME LOCATIONS AFFECTED DOUGLAS BY 342 PM MDT ORPHA BY 402 PM MDT * AT 321 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR 6 MILES SOUTH OF DOUGLAS MOVING NORTH AT 15 MPH. LARGE HAIL IS LIKELY WITH THIS STORM. SEEK SHELTER INSIDE A STURDY BUILDING AWAY FROM ALL WINDOWS UNTIL THE STORM PASSES. WCJIN-WYNE BAKER
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, Jun 14, 10:15 AM MDT, 5 hours 10 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-150000- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1015 AM MDT SAT JUN 14 1997 THE SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA IS MEDIUM TODAY...ESPECIALLY ALONG THE SOUTHEAST WYOMING BORDER AND OVER THE NEBRASKA PANHANDLE. SPOTTER ACTIVATION MAY BE REQUIRED. DISCUSSION...MOIST AND UNSTABLE AIR WILL REMAIN OVER THE AREA TODAY. INCREASING SOUTHERLY WINDS WILL BRING WARMER TEMPERATURES...ADDING TO THE INSTABILITY OF THE AIR. A TROUGH OF LOW PRESSURE WILL SET UP ALONG OR JUST INSIDE THE EASTERN WYOMING BORDER BY AFTERNOON. SCATTERED THUNDERSTORMS WILL DEVELOP OVER THE AREA THIS AFTERNOON. SOME OF THESE MAY BECOME SEVERE ALONG AND EAST OF THE LOW PRESSURE TROUGH...ESPECIALLY IN THE NEBRASKA PANHANDLE. < < WCJIN-WYSE-WYNE JLH
Special weather statement, Jun 14, 10:17 AM MDT, 5 hours 8 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-150000- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1015 AM MDT SAT JUN 14 1997 THE SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA IS MEDIUM TODAY...ESPECIALLY ALONG THE SOUTHEAST WYOMING BORDER AND OVER THE NEBRASKA PANHANDLE. SPOTTER ACTIVATION MAY BE REQUIRED. DISCUSSION...MOIST AND UNSTABLE AIR WILL REMAIN OVER THE AREA TODAY. INCREASING SOUTHERLY WINDS WILL BRING WARMER TEMPERATURES...ADDING TO THE INSTABILITY OF THE AIR. A TROUGH OF LOW PRESSURE WILL SET UP ALONG OR JUST INSIDE THE EASTERN WYOMING BORDER BY AFTERNOON. SCATTERED THUNDERSTORMS WILL DEVELOP OVER THE AREA THIS AFTERNOON. SOME OF THESE MAY BECOrME SEVERE ALONG AND EAST OF THE LOW PRESSURE TROUGH...ESPECIALLY IN THE NEBRASKA PANHANDLE. < < WCJIN-WYSE-WYNE JLH
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 5:27 PM MDT | Tornado Warning | CYS | Laramie | 33 min |
| Jun 14, 5:57 PM MDT | Tornado Warning | CYS | Laramie | 28 min |
| Jun 14, 5:59 PM MDT | Tornado Warning | CYS | Laramie | 26 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.