Alert archive / Nebraska / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 164, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 20, 1993, 2:49 AM MDT for Scotts Bluff County, Sioux County, Nebraska. It was in force for 56 min.
The area
The counties it named.
The facts
- Issued
- Aug 20, 1993, 2:49 AM MDT (08:49 UTC)
- Expired
- Aug 20, 1993, 3:45 AM MDT
- In force
- 56 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
Counties Scotts Bluff County, NE, Sioux County, NE
The nearest sounding before it
Rapid City, SD (KRAP), launched 00:00Z, 8.8 hours before the alert went out and 222 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
- 774 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 1714 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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, Aug 20, 12:27 AM MDT, 2 hours 22 minutes before
WYZ068-069-070-200830- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1227 AM MDT FRI AUG 20 1993 ...STRONG THUNDERSTORMS WERE NEAR WHEATLAND IN SOUTHEAST WYOMING... AT 1215 AM MDT...RADAR INDICATED THAT STRONG THUNDERSTORMS HAD REDEVELOPED ABOUT 10 MILES SOUTHEAST OF WHEATLAND. ANOTHER STORM WAS 8 MILES NORTHEAST OF SLATER. THIS AREA IS RIGHT ALONG THE PLATTE AND GOSHEN COUNTY LINE. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 15 MILES AN HOUR. NO REPORTS HAD BEEN RECEIVED FROM OBSERVERS IN THE AREAS. SMALL HAIL IS ALSO LIKELY. STORMS IN THIS AREA EARLIER IN THE EVENING PRODUCED HEAVY RAIN. MORE RAIN OVER THE WET GROUND COULD CAUSE RAPID RUNOFF AND LOCALIZED FLASH FLOODING IN SOME AREAS. PEOPLE TRAVELING IN PLATTE AND GOSHEN COUNTIES SHOULD PAY CLOSE ATTENTION AND WATCH FOR FLOODING IN LOW LYING AREAS. DO NOT ATTEMPT TO DRIVE OR WADE THROUGH FLOODED AREAS. THE CURRENT COULD BE STRONGER THAN EXPECTED AND OTHER HAZARDS COULD BE HIDDEN BENEATH THE WATER. WCJIN-WYSE CAS
Special weather statement, Aug 20, 12:31 AM MDT, 2 hours 18 minutes before
WYZ068-069-070-200830- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1227 AM MDT FRI AUG 20 1993 ...STRONG THUNDERSTORMS WERE NEAR WHEATLAND IN SOUTHEAST WYOMING... AT 1215 AM MDT...RADAR INDICATED THAT STRONG THUNDERSTORMS HAD REDEVELOPED ABOUT 10 MILES SOUTHEAST OF WHEATLAND. ANOTHER STORM WAS 8 MILES NORTHEAST OF SLATER. THIS AREA IS RIGHT ALONG THE PLATTE AND GOSHEN COUNTY LINE. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 15 MILES AN HOUR. NO REPORTS HAD BEEN RECEIVED FROM OBSERVERS IN THE AREAS. SMALL HAIL IS ALSO LIKELY. STORMS IN THIS AREA EARLIER IN THE EVENING PRODUCED HEAVY RAIN. MORE RAIN OVER THE WET GROUND COULD CAUSE RAPID RUNOFF AND LOCALIZED FLASH FLOODING IN SOME AREAS. PEOPLE TRAVELING IN PLATTE AND GOSHEN COUNTIES SHOULD PAY CLOSE ATTENTION AND WATCH FOR FLOODING IN LOW LYING AREAS. DO NOT ATTEMPT TO DRIVE OR WADE THROUGH FLOODED AREAS. THE CURRENT COULD BE STRONGER THAN EXPECTED AND OTHER HAZARDS COULD BE HIDDEN BENEATH THE WATER. WCJIN-WYSE CAS
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 3:47 AM MDT | Severe Thunderstorm Warning | CYS | Scotts Bluff | 28 min |
| Aug 19, 6:19 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 56 min |
| Aug 20, 1:21 AM MDT | Flash Flood Warning | CYS | Goshen | 2 hr |
| Aug 20, 2:22 AM MDT | Severe Thunderstorm Warning | CYS | Goshen | 34 min |
| Aug 20, 3:34 AM MDT | Flash Flood Warning | CYS | Goshen | 86 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 1993Every severe thunderstorm warning in 1993
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.