Alert archive / Wyoming / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 29, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 10, 1999, 3:06 PM MDT for Carbon County, Wyoming. It was in force for 14 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 10, 1999, 3:06 PM MDT (21:06 UTC)
- Expired
- Jun 10, 1999, 3:20 PM MDT
- In force
- 14 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Carbon County, WY
The radar
The Cheyenne radar (KCYS), 187 km from the middle of the area, began a volume at 21:09 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 12:00Z, 9.1 hours before the alert went out and 372 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
- 125 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 690 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 69 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.
NWS Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 10, 2:57 AM MDT, 12 hours 9 minutes earlier.
Area forecast discussion, Jun 10, 2:57 AM MDT, 12 hours 9 minutes before
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</html>In the hours before
Special weather statement, Jun 10, 10:03 AM MDT, 5 hours 3 minutes before
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</html>Special weather statement, Jun 10, 2:26 PM MDT, 40 minutes before
WYZ066>070-110200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 226 PM MDT THU JUN 10 1999 ...SEVERE THUNDERSTORM WATCH FOR SOUTHEAST WYOMING AND PARTS OF THE WESTERN NEBRASKA PANHANDLE UNTIL 800 PM... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR SOUTHEAST WYOMING AND PARTS OF THE WESTERN NEBRASKA PANHANDLE UNTIL 900 PM... IN WYOMING...THIS WATCH AFFECTS PEOPLE IN PLATTE...GOSHEN... LARAMIE AND EASTERN ALBANY COUNTIES. THIS INCLUDES THE CITIES OF CHEYENNE...PINE BLUFF...TORRINGTON AND WHEATLAND. THE CITY OF LARAMIE IS NOT INCLUDED IN THE WATCH. IN THE NEBRASKA PANHANDLE...THE WATCH AFFECTS SCOTTS BLUFF... BANNER...KIMBALL...BOX BUTTE...CHEYENNE AND SOUTHERN SIOUX COUNTIES. THIS INCLUDES SCOTTSBLUFF...ALLIANCE...SIDNEY AND KIMBALL. A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR LARGE HAIL...DAMAGING WINDS AND DEADLY LIGHTNING IN AND CLOSE TO THE WATCH AREA. STAY TUNED TO YOUR FAVORITE SOURCE OF WEATHER INFORMATION STATEMENTS FOR LATER STATEMENTS AND POSSIBLE WARNINGS. WCJIN-WYSE- BANN
Special weather statement, Jun 10, 2:26 PM MDT, 40 minutes before
WYZ066>070-110200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 226 PM MDT THU JUN 10 1999 ...SEVERE THUNDERSTORM WATCH FOR SOUTHEAST WYOMING AND PARTS OF THE WESTERN NEBRASKA PANHANDLE UNTIL 800 PM... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR SOUTHEAST WYOMING AND PARTS OF THE WESTERN NEBRASKA PANHANDLE UNTIL 900 PM... IN WYOMING...THIS WATCH AFFECTS PEOPLE IN PLATTE...GOSHEN... LARAMIE AND EASTERN ALBANY COUNTIES. THIS INCLUDES THE CITIES OF CHEYENNE...PINE BLUFF...TORRINGTON AND WHEATLAND. THE CITY OF LARAMIE IS NOT INCLUDED IN THE WATCH. IN THE NEBRASKA PANHANDLE...THE WATCH AFFECTS SCOTTS BLUFF... BANNER...KIMBALL...BOX BUTTE...CHEYENNE AND SOUTHERN SIOUX COUNTIES. THIS INCLUDES SCOTTSBLUFF...ALLIANCE...SIDNEY AND KIMBALL. A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR LARGE HAIL...DAMAGING WINDS AND DEADLY LIGHTNING IN AND CLOSE TO THE WATCH AREA. STAY TUNED TO YOUR FAVORITE SOURCE OF WEATHER INFORMATION STATEMENTS FOR LATER STATEMENTS AND POSSIBLE WARNINGS. WCJIN-WYSE- BANN
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 3:58 PM MDT | Severe Thunderstorm Warning | CYS | Carbon | 32 min |
| Jun 10, 5:13 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 32 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 1999Every severe thunderstorm warning in 1999
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.