Alert archive / Wyoming / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 79, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 10, 1997, 12:34 PM MDT for Platte County, Wyoming. It was in force for 46 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
- Jul 10, 1997, 12:34 PM MDT (18:34 UTC)
- Expired
- Jul 10, 1997, 1:20 PM MDT
- In force
- 46 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 18:34 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, 6.6 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
- 779 J/kg
- Mixed-layer CIN
- -487 J/kg
- Mixed-layer LCL
- 1898 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 147 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
535 WUUS1 KCYS 101833 RRA SVRCYS WYC031-101920- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 1234 PM MDT THU JUL 10 1997 * SEVERE THUNDERSTORM WARNING FOR CENTRAL PLATTE COUNTY IN SOUTHEASTERN WYOMING * UNTIL 120 PM MDT * SOME LOCATIONS AFFECTED I-25 AT BORDEAUX ROAD BY 1259 PM MDT INTERSECTION OF I-25 AND U.S.34 BY 103 PM MDT WHEATLAND BY 116 PM MDT * AT 1231 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER RADAR AND SPOTTER REPORTS 12 MILES SOUTHWEST OF WHEATLAND OR 10 MILES WEST OF INTERSECTION OF I-25 AND U.S.34 MOVING NORTHEAST AT 15 MPH. AIR FORCE PERSONNEL REPORTED A WIND GUST AROUND 80 MPH JUST SOUTHEAST OF WHEATLAND. STRONG WINDS WITH THIS STORM MAY CAUSE INJURY OR DAMAGE. TAKE SHELTER INSIDE A STURDY BUILDING AWAY FROM ALL DOORS AND WINDOWS. WCJIN-WYSE JMH
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, Jul 10, 9:59 AM MDT, 2 hours 35 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-110000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1000 AM MDT THU JUL 10 1997 THE SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA IS LOW THIS AFTERNOON AND EVENING. SPOTTER ACTIVATION WILL NOT BE REQUIRED TODAY. DISCUSSION....VERY WARM AIR WILL CONTINUE OVER THE AREA TODAY. THIS WILL SERVE TO CAP THUNDERSTORM DEVELOPMENT...WITH ONLY ISOLATED STORMS STORMS EXPECTED LAzTE THIS AFTERNOON AND EVENING. WCJIN-WYNE-WYSE JLH
Special weather statement, Jul 10, 10:00 AM MDT, 2 hours 34 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-110000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1000 AM MDT THU JUL 10 1997 THE SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA IS LOW THIS AFTERNOON AND EVENING. SPOTTER ACTIVATION WILL NOT BE REQUIRED TODAY. DISCUSSION....VERY WARM AIR WILL CONTINUE OVER THE AREA TODAY. THIS WILL SERVE TO CAP THUNDERSTORM DEVELOPMENT...WITH ONLY ISOLATED STORMS STORMS EXPECTED LATE THIS AFTERNOON AND EVENING. WCJIN-WYNE-WYSE JLH
Special weather statement, Jul 10, 11:30 AM MDT, 1 hour 4 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-110000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1130 AM MDT THU JUL 10 1997 THE SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA IS LOW THIS AFTERNOON AND EVENING. SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY. DISCUSSION....A WARM AND SLIGHTLY UNSTABLE AIR MASS WILL BE OVER THE AREA TODAY. A WEAK UPPER LEVEL WEATHER DISTURBANCE WILL TRIGGER WIDELY SCATTERED THUNDERSTORMS. WHILE NO SEVERE WEATHER IS EXPECTED... A FEW OF THESE THUNDERSTORMS WILL PRODUCE WIND GUSTS TO 40 MPH. WCJIN-WYNE-WYSE JLH
Special weather statement, Jul 10, 11:31 AM MDT, 1 hour 3 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-110000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1130 AM MDT THU JUL 10 1997 THE SEVERE WEATHER POTENTIAL IN THE CHEYENNE NWS COUNTY WARNING AREA IS LOW THIS AFTERNOON AND EVENING. SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY. DISCUSSION....A WARM AND SLIGHTLY UNSTABLE AIR MASS WILL BE OVER THE AREA TODAY. A WEAK UPPER LEVEL WEATHER DISTURBANCE WILL TRIGGER WIDELY SCATTERED THUNDERST0ORMS. WHILE NO SEVERE WEATHER IS EXPECTED... A FEW OF THESE THUNDERSTORMS WILL PRODUCE WIND GUSTS TO 40 MPH. WCJIN-WYNE-WYSE JLH
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.