Alert archive / Wyoming / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 27, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at May 10, 1998, 9:26 PM MDT for Laramie 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 10, 1998, 9:26 PM MDT (03:26 UTC)
- Expired
- May 10, 1998, 10:00 PM MDT
- In force
- 34 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Laramie County, WY
The radar
The Cheyenne radar (KCYS), 20 km from the middle of the area, began a volume at 03:26 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
Denver, CO (KDNR), launched 00:00Z, 3.4 hours before the alert went out and 202 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
- 56 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 2948 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
378 WUUS1 KCYS 110328 RRA SVRCYS WYC021-110400- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 926 PM MDT SUN MAY 10 1998 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN LARAMIE COUNTY IN SOUTHEASTERN WYOMING * UNTIL 1000 PM MDT * AT 925 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7 MILES SOUTHWEST OF PINE BLUFFS... MOVING NORTHEAST AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... PINE BLUFFS AT 945 PM MDT DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS WCJIN-WYSE COX
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 10, 3:29 PM MDT, 5 hours 57 minutes before
WYZ059-060-067>070-NEZ001>003-019>021-054-055-110000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 329 PM MDT SUN MAY 10 1998 ...S SEVERE THUNDERSTORM WATCH FOR THE NEBRASKA PANHANDLE AND MUCH OF SOUTHEAST WYOMING IS IN EFFECT UNTIL 9 PM... THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR THE NEBRASKA PANHANDLE AND MUCH OF SOUTHEAST WYOMING UNTIL 9 PM. THIS WATCH INCLUDES THE CITIES OF LUSK...DOUGLAS...WHEATLAND...TORRINGTON... SCOTTS BLUFF...GERING...CHADRON...ALLIANCE...SIDNEY AND KIMBALL. AY 320 PM...SEVERE THUNDERSTORMS WERE LOCATED FROM 26 MILES SOUTH OF TORRINGTON TO 5 MILES NORTHEAST OF SCOTTSBLUFF. THESE STORMS WERE MOVING TO THE EAST AT 20 MPH. AT 2 PM...GOLF BALL SIZED HAIL FELL ABOUT 20 MILES NORTH OF CHEYENNE AS WELL AS 2 FUNNEL CLOUDS. IN ADDTION...ONE HALF INCH DIAMETER HAIL FELL AT 3 PM IN SOUTHWEST GOSHEN COUNTY. < LARGE HAIL...STRONG WINDS IN EXCESS OF 50 MPH AND VERY HEAVY RAINFALL WILL BE ASSOCIATED WITH THE STORMS IN THE WATCH AREA THROUGH THE EVENING. SO FAR THIS AFTERNOON...DOPPLER RADAR HAS INDICATED RAINFALL AMOUNTS OF UP TO AN INCH PER HOUR. THESE HEAVY RAIN MAY PRODUCE URBAN AND LOW LAND FLOODING. A WATCH MEANS THAT WEATHER CONDITIONS ARE FAVORABLE FOR THE FORMATION OF SEVERE THUNDERSTORMS IN AND NEAR THAT AREA. STEPS SHOULD BE TAKEN NOW TO FIND THE SAFEST AREA IN YOUR LOCATION. PEOPLE IN SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE SHOULD BE ALERT TO THE APPROACH OF ANY THUNDERSTORMS. IF A STORM APPROACHES MOVE TO YOUR SAFE SHELTER. WCJIN-WYSE-WYNE WEILAND
Special weather statement, May 10, 3:29 PM MDT, 5 hours 57 minutes before
WYZ059-060-067>070-NEZ001>003-019>021-054-055-110000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 329 PM MDT SUN MAY 10 1998 ...S SEVERE THUNDERSTORM WATCH FOR THE NEBRASKA PANHANDLE AND MUCH OF SOUTHEAST WYOMING IS IN EFFECT UNTIL 9 PM... THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR THE NEBRASKA PANHANDLE AND MUCH OF SOUTHEAST WYOMING UNTIL 9 PM. THIS WATCH INCLUDES THE CITIES OF LUSK...DOUGLAS...WHEATLAND...TORRINGTON... SCOTTS BLUFF...GERING...CHADRON...ALLIANCE...SIDNEY AND KIMBALL. AY 320 PM...SEVERE THUNDERSTORMS WERE LOCATED FROM 26 MILES SOUTH OF TORRINGTON TO 5 MILES NORTHEAST OF SCOTTSBLUFF. THESE STORMS WERE MOVING TO THE EAST AT 20 MPH. AT 2 PM...GOLF BALL SIZED HAIL FELL ABOUT 20 MILES NORTH OF CHEYENNE AS WELL AS 2 FUNNEL CLOUDS. IN ADDTION...ONE HALF INCH DIAMETER HAIL FELL AT 3 PM IN SOUTHWEST GOSHEN COUNTY. < LARGE HAIL...STRONG WINDS IN EXCESS OF 50 MPH AND VERY HEAVY RAINFALL WILL BE ASSOCIATED WITH THE STORMS IN THE WATCH AREA THROUGH THE EVENING. SO FAR THIS AFTERNOON...DOPPLER RADAR HAS INDICATED RAINFALL AMOUNTS OF UP TO AN INCH PER HOUR. THESE HEAVY RAIN MAY PRODUCE URBAN AND LOW LAND FLOODING. A WATCH MEANS THAT WEATHER CONDITIONS ARE FAVORABLE FOR THE FORMATION OF SEVERE THUNDERSTORMS IN AND NEAR THAT AREA. STEPS SHOULD BE TAKEN NOW TO FIND THE SAFEST AREA IN YOUR LOCATION. PEOPLE IN SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE SHOULD BE ALERT TO THE APPROACH OF ANY THUNDERSTORMS. IF A STORM APPROACHES MOVE TO YOUR SAFE SHELTER. WCJIN-WYSE-WYNE WEILAND
Special weather statement, May 10, 5:32 PM MDT, 3 hours 54 minutes before
NEZ019-110000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 532 PM MDT SUN MAY 10 1998 ...A SEVERE THUNDERSTORM WATCH REMAINS POSTED FOR ALL OF THE NEBRASKA PANHANDLE UNTIL 9 PM... AT 530 PM...A THUNDERSTORM WITH HEAVY RAIN AND SMALL HAIL WAS LOCATED JUST SOUTH OF GERING. THIS STORM WAS MOVING NORTH NORTHEAST AT 15 MPH AND WILL IMPACT GERING THROUGH 550 PM. THIS STORM WILL MOVE VERY CLOSE TO SCOTTSBLUFF BY 545 PM. IF YOU ARE IN THE PATH OF THIS STORM...TAKE SHELTER AND STAY AWAY FROM WINDOWS. DMM
Special weather statement, May 10, 5:32 PM MDT, 3 hours 54 minutes before
NEZ019-110000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 532 PM MDT SUN MAY 10 1998 ...A SEVERE THUNDERSTORM WATCH REMAINS POSTED FOR ALL OF THE NEBRASKA PANHANDLE UNTIL 9 PM... AT 530 PM...A THUNDERSTORM WITH HEAVY RAIN AND SMALL HAIL WAS LOCATED JUST SOUTH OF GERING. THIS STORM WAS MOVING NORTH NORTHEAST AT 15 MPH AND WILL IMPACT GERING THROUGH 550 PM. THIS STORM WILL MOVE VERY CLOSE TO SCOTTSBLUFF BY 545 PM. IF YOU ARE IN THE PATH OF THIS STORM...TAKE SHELTER AND STAY AWAY FROM WINDOWS. DMM
Special weather statement, May 10, 8:30 PM MDT, 56 minutes before
WYZ059-060-067>070-110330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 830 PM MDT SUN MAY 10 1998 ...SEVERE THUNDERSTORM WATCH 328 FOR PARTS OF SOUTHEAST WYOMING HAS BEEN DROPPED... THE SEVERE THUNDERSTORM WATCH...WHICH INCLUDED SOUTHEAST CONVERSE... SOUTHERN NIOBRARA...PLATTE...GOSHEN AND NORTHERN LARAMIE COUNTIES... HAS BEEN DROPPED AS OF 825PM MDT. THE SEVERE THUNDERSTORMS HAVE MOVED EAST OF WYOMING AND NO SEVERE THUNDERSTORM DEVELOPMENT IS EXPECTED IN WYOMING. A SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT FOR EXTREME NORTHEAST LARAMIE AND EXTREME SOUTHEAST GOSHEN COUNTIES UNTIL 11PM DUE TO ACCUMULATED HAIL AND RAINFALL OVER THE HORSE CREEK DRAINAGE. WCJIN-BWYSE COX
Special weather statement, May 10, 8:30 PM MDT, 56 minutes before
WYZ059-060-067>070-110330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 830 PM MDT SUN MAY 10 1998 ...SEVERE THUNDERSTORM WATCH 328 FOR PARTS OF SOUTHEAST WYOMING HAS BEEN DROPPED... THE SEVERE THUNDERSTORM WATCH...WHICH INCLUDED SOUTHEAST CONVERSE... SOUTHERN NIOBRARA...PLATTE...GOSHEN AND NORTHERN LARAMIE COUNTIES... HAS BEEN DROPPED AS OF 825PM MDT. THE SEVERE THUNDERSTORMS HAVE MOVED EAST OF WYOMING AND NO SEVERE THUNDERSTORM DEVELOPMENT IS EXPECTED IN WYOMING. A SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT FOR EXTREME NORTHEAST LARAMIE AND EXTREME SOUTHEAST GOSHEN COUNTIES UNTIL 11PM DUE TO ACCUMULATED HAIL AND RAINFALL OVER THE HORSE CREEK DRAINAGE. WCJIN-BWYSE COX
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 6:06 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 39 min |
| May 10, 6:40 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 60 min |
| May 10, 6:44 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 61 min |
| May 10, 9:57 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 48 min |
| May 11, 5:18 AM MDT | Severe Thunderstorm Warning | CYS | Albany | 32 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 1998Every severe thunderstorm warning in 1998
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.