Alert archive / Wyoming / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 2, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at May 24, 1997, 1:31 PM MDT for Platte County, Wyoming. It was in force for 34 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 24, 1997, 1:31 PM MDT (19:31 UTC)
- Expired
- May 24, 1997, 2:05 PM MDT
- In force
- 34 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Platte County, WY
The radar
The Cheyenne radar (KCYS), 110 km from the middle of the area, began a volume at 19:34 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
Rapid City, SD (KUNR), launched 12:00Z, 7.5 hours before the alert went out and 274 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
- 534 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 64 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 241928 SVRCYS WYC031-242005- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 131 PM MDT SAT MAY 24 1997 * SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PLATTE COUNTY IN SOUTHEASTERN WYOMING * UNTIL 205 PM MDT * SOME AFFECTED LOCATIONS INCLUDE 3 MILES EAST OF WHEATLAND GUERNSEY * AT 125 PM A SEVERE THUNDERSTORM WAS LOCATED 3 MILES EAST OF WHEATLAND MOVING NORTHEAST AT 20 MPH. THIS STORM HAS PRODUCED DIME TO QUARTER SIZED HAIL. LARGE HAIL IS LIKELY WITH THIS STORM. SEEK SHELTER INSIDE A STURDY BUILDING AWAY FROM ALL WINDOWS UNTIL THE STORM PASSES. &
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, May 24, 9:56 AM MDT, 3 hours 35 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-250000- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1000 AM MDT SAT MAY 24 1997 SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA IS LOW TODAY. SPOTTER ACTIVATION WILL NOT BE REQUIRED. DISCUSSION...A MOIST AND UNSTABLE AIRMASS WILL BE OVER SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE AHEAD OF AN APPROACHING LOW PRESSURE SYSTEM. SHOWERS AND THUNDERSTORMS WILL DEVELOP THIS AFTERNOON INTO THE EVENING AND SOME STRONG STORMS ARE LIKELY WITH ONLY ISOLATED SEVERE STORMS POSSIBLE. WCJIN-WYSE-WYNE JMH
Special weather statement, May 24, 10:00 AM MDT, 3 hours 31 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-250000- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1000 AM MDT SAT MAY 24 1997 SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA IS LOW TODAY. SPOTTER ACTIVATION WILL NOT BE REQUIRED. DISCUSSION...A MOIST AND UNSTABLE AIRMASS WILL BE OVER SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE AHEAD OF AN APPROACHING LOW PRESSURE SYSTEM. SHOWERS AND THUNDERSTORMS WILL DEVELOP THIS AFTERNOON INTO THE EVENING AND SOME STRONG STORMS ARE LIKELY WITH ONLY ISOLATED SEVERE STORMS POSSIBLE. WCJIN-WYSE-WYNE JMH
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 2:36 PM MDT | Severe Thunderstorm Warning | CYS | Converse, Niobrara, Platte | 34 min |
| May 24, 3:27 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 33 min |
| May 24, 3:31 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 34 min |
| May 24, 4:03 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 32 min |
| May 24, 4:06 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 34 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.