Alert archive / Wyoming / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 12, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at May 24, 1990, 2:35 PM MDT for Goshen County, Laramie County, Platte County, Wyoming. It was in force for 55 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 24, 1990, 2:35 PM MDT (20:35 UTC)
- Expired
- May 24, 1990, 3:30 PM MDT
- In force
- 55 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
Counties Goshen County, WY, Laramie County, WY, Platte County, WY
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 24, 2:35 PM MDT | Hail 1 | Laramie, WY | |
| May 24, 3:10 PM MDT | Tornado F0 | Platte, WY |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 8.6 hours before the alert went out and 251 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
- 1956 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 9:17 AM MDT, 5 hours 18 minutes before
WYZALL-241700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 915 AM MDT THU MAY 24 1990 ...A MODERATE RISK OF SEVERE THUNDERSTORMS IS THE OUTLOOK FOR NORTHEAST WYOMING THIS THURSDAY AFTERNOON... AN AREA OF LOW PRESSURE AND AN ASSOCIATED COLD FRONT WILL ENGULF WESTERN WYOMING TODAY. SOME THUNDERSTORMS HAVE DEVELOPED IN FAR WESTERN WYOMING AND IDAHO THIS MORNING AND WILL BRING THE RISK FOR SEVERE THUNDERSTORM TO NORTHEAST WYOMING BY THIS AFTERNOON AND EARLY EVENING. UNSTABLE AIR BY THIS AFTERNOON COULD PRODUCE BRIEF HEAVY RAIN... HAIL AND STRONG WINDS FROM SHERIDAN IN NORTH CENTRAL WYOMING TO CHEYENNE IN THE SOUTHEAST CORNER OF THE STATE. ADDITIONALLY...STRONG WI NDS AHEAD OF THIS SYSTEM WILL OCCUR. SOUTH TO SOUTHWEST WINDS OF 20 TO 35 MILES AN HOUR ARE EXPECTED OVER MUCH OF WYOMING TODAY. SGS
Special weather statement, May 24, 12:14 PM MDT, 2 hours 21 minutes before
WYZALL-242000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1215 PM MDT THU MAY 24 1990 SEVERE THUNDERSTORMS ARE POSSIBLE IN NORTHEAST WYOMING AND EXTREME EASTERN WYOMING THIS THURSDAY AFTERNOON... AN AREA OF LOW PRESSURE AND AN ASSOCIATED COLD FRONT WILL MOVE INTO CENTRAL WYOMING THIS AFTERNOON. A FEW THUNDERSTORMS COULD CONTAIN BRIEF HEAVY RAIN...HAIL AND STRONG GUSTY WINDS AHEAD OF THIS COLD FRONT THIS AFTERNOON AND INTO THE EVENING. THE STRONGEST THUNDERSTORMS WILL BE EAST OF A LINE FROM SHERIDAN IN NORTH CENTRAL WYOMING TO CHEYENNE IN THE SOUTHEAST CORNER OF THE STATE. PERSONS ENGAGED IN OUTDOOR ACTIVITIES SHOULD STAY TUNED TO LOCAL RADIO AND TV OR USE THEIR NOAA WEATHER RADIO RECEIVERS TO KEEP UP TO DATE ON WATCHES AND WARNINGS WHICH WILL LIKELY BE NEEDED THIS AFTERNOON FOR NORTHEAST AND EXTREME EASTERN WYOMING. SGS
Special weather statement, May 24, 1:00 PM MDT, 1 hour 35 minutes before
WYZ006-012-242000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1255 PM MDT THU MAY 24 1990 A TORNADO WATCH AREA HAS BEEN POSTED FOR THE NORTHEAST PORTION OF WYOMING UNTIL 7PM MDT THIS THURSDAY EVENING. THE WATCH AREA INCLUDES THE CITIES OF GILLETTE...NEWCASTLE... DOUGLAS...LUSK...WHEATLAND AND TORRINGTON. THUNDERSTORMS WERE BEGINNING TO DEVELOP IN THE AREA NEAR THE NOON HOUR. PERSONS ENGAGED IN OUTDOOR ACTIVITIES SHQOULD STAY TUNED TO LOCAL RADIO AND TV OR USE THEIR NOAA WEATHER RADIO RECEIVERS TO KEEP UP TO DATE ON THIS TORNADO WATCH AREA THE REST OF THE AFTERNOON AND INTO THE EVENING HOURS. SGS
Special weather statement, May 24, 1:30 PM MDT, 1 hour 5 minutes before
WYZ012-242030-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
125 PM MDT THU MAY 24 1990
NEAR 120 PM WEATHER RADAR AND SATELLITE PHOTOS INDICATED A STRONG
THUNDERSTORM 5 MILES NORTHWEST OF WHEATLAND IN SOUTHEAST WYOMING.
THE THUNDERSTORM WAS MOVING TO THE NORTHEAST AT 15 TO 20 MILES
AN HOUR AND WILL PASS TO THE NORTH OF WHEATLAND IN PLATTE COUNTY.
OTHER THUNDERSTORMS WERE DEVELOPING OVER SOUTHEAST WYOMING EARLY
THIS AFTERNO{ON. THESE THUNDERSTORMS WERE ALSO MOVING TO THE
NORTHEAST.
A TORNADO WATCH CONTINUES IN EFFECT FOR PLATTE AND GOSHEN COUNTIES
ALONG WITH NORTHEAST WYOMING UNTIL 7 PM MDT.
IF THREATENING WEATHER APPROACHES...TAKE COVER IMMEDIATELY.
SGSSpecial weather statement, May 24, 2:24 PM MDT, 11 minutes before
NEZ001-005-242230 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 225 PM MDT THU MAY 24 1990 ...TORNADO WATCH UNTIL 700 PM MDT FOR PARTS OF THE CENTRAL AND NORTH NEBRASKA PANHANDLE... AT 225 PM MDT...ONLY A FEW ISOLATED RAINSHOWERS WERE OCCURRING OVER THE NORTHEAST NEBRASKA PANHANDLE SOUTHEAST OF GORDON NEBRASKA. THERE HAVE BEEN NO REPORTS OF SEVERE WEATHER IN THE NEBRASKA PANHANDLE UP UNTIL 225 PM MDT. STRONG THUNDERSTORMS WERE HOWEVER OVER SOUTHEAST WYOMING...NEAR WHEATLAND AND 30 MILES NORTH OF CHEYENNE WYOMING. THESE STORMS DO NOT POSE A THREAT TO THE PANHANDLE OF NEBRASKA AT THIS TIME. A TORNADO WATCH DOES REMAIN IN EFFECT OVER PARTS OF THE NEBRASKA PANHANDL4E UNTIL 700 PM MDT...AND YOU SHOULD CONTINUE TO MONITOR RADIO AND TELEVISION FOR LATER STATEMENTS OR WARNINGS. WIRTH
Special weather statement, May 24, 2:31 PM MDT, 4 minutes before
NEZ002-242130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE VALENTINE NE ISSUED BY SCOTTSBLUFF NE 230 PM MDT WED MAY 24 1990 ...STRONG THUNDERSTORM BUILDING OVER NORTHCENTRAL NEBRASKA... AT 225 PM MDT...AN ISOLATED STRONG THUNDERSTORM HAD DEVELOPED OVER SOUTHWEST CHERRY COUNTY IN NORTHCENTRAL NEBRASKA. THE STORM WAS LOCATED 55 MILES NORTHEAST OF ALLIANCE NEBRASKA...OR 70 MILES SOUTHWEST OF VALENTINE NEBRASKA. THE STORM WAS MOVING NORTHEAAST AT 30 MILES AN HOUR. BRIEF HEAVY RAIN AND SMALL HAIL CAN BE EXPECTED WITH THIS STORM UNTIL 330 PM MDT. WIRTH
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 6:22 PM MDT | Severe Thunderstorm Warning | CYS | Sheridan | 60 min |
| May 24, 2:00 PM MDT | Tornado Warning | CYS | Platte | 45 min |
| May 24, 2:50 PM MDT | Tornado Warning | CYS | Laramie | 25 min |
| May 24, 3:18 PM MDT | Tornado Warning | CYS | Goshen, Laramie | 42 min |
| May 24, 4:13 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 62 min |
| May 24, 4:49 PM MDT | Tornado Warning | CYS | Laramie | 56 min |
| May 24, 5:46 PM MDT | Tornado Warning | CYS | Goshen, Laramie | 59 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 1990Every severe thunderstorm warning in 1990
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.