Alert archive / Nebraska / Flash Flood Warnings in 1996
Flash Flood Warning 4, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Aug 3, 1996, 3:41 PM MDT for Sioux County, Nebraska. It was in force for 19 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
- Aug 3, 1996, 3:41 PM MDT (21:41 UTC)
- Expired
- Aug 3, 1996, 4:00 PM MDT
- In force
- 19 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Sioux County, NE
The radar
The Cheyenne radar (KCYS), 172 km from the middle of the area, began a volume at 21:43 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, 9.7 hours before the alert went out and 190 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
- 3 J/kg
- Mixed-layer CIN
- -408 J/kg
- Mixed-layer LCL
- 3714 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -55 m²/s²
- 0-3 km storm-relative helicity
- 127 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 flash flood 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 3, 10:09 AM MDT, 5 hours 32 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-032300-
SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
1008 AM MDT SAT AUG 3 1996
THE SEVERE WEATHER POTENTIAL IN THE COUNTY WARNING AREA OF THE CHEYENNE
NATIONAL WEATHER SERVICE OFFICE IS LOW THIS AFTERNOON AND EVENING IN
SOUTHEAST WYOMING AND THE WESTERN NEBRASKA PANHANDLE. IT IS MEDIUM
IN THE CENTRAL AND EASTERN PARTS OF THE NEBRASKA PANHANDLE.
SPOTTER ACTIVATION MAY BE NECESSARY IN PARTS OF THE NEBRASKA PANHANDLE.
DISCUSSION...AN UNSTABLE AIR MASS WILL REMAIN OVER THE OUTLOOK AREA
TODAY. HOWEVER...LOWER LEVELS OF THE ATMOSPHERE WILL BE DRYING SOME
THIS AFTERNOON...LEAVING THE BEST MOISTURE OVER THE EAST HALF OF THE
NEBRASKA PANHANDLE. WIDELY SCATTERED THUNDERSTORMS ARE EXPECTED TO
DEVELOP OVER THE AREA...WITH SOME CAUSING GUSTY WINDS AND SMALL HAIL.
<
THIS OUTLOOK IS FOR THE FOLLOWING COUNTIES IN SOUTHEAST WYOMING AND
THE NEBRASKA PANHANDLE:
WY...ALBANY CARBON CONVERSE GOSHEN LARAMIE NIOBRARA PLATTE
NE...BANNER BOX BUTTE CHEYENNE DAWES KIMBALL MORRILL SIOUX
SCOTTS BLUFF
WCJIN-WYSE-WYNE
JLHSpecial weather statement, Aug 3, 10:18 AM MDT, 5 hours 23 minutes before
NEZ001>003-019>021-054-055-031745- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1018 AM MDT SAT AUG 3 1996 CHEYENNE DOPPLER WEATHER RADAR SHOWED THAT THE LINE OF SHOWERS AND WEAK THUNDERSTORMS WEAKENED EVEN MORE MOVING INTO WESTERN NEBRASKA. INDEED AS OF 1000 AM MDT...THERE WERE ONLY LIGHT SHOWERS LEFT IN THIS BAND AS ALL OF THE EARLIER WEAK THUNDERSTORMS HAD DISSIPATED. THE BAND OF LIGHT SHOWERS WILL CONTINUE EAST AND EXIT THE PANHANDLE ABOUT NOON. JLH
Special weather statement, Aug 3, 2:21 PM MDT, 1 hour 20 minutes before
WYZ059>062-064-065-067-068-032105- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 220 PM MDT SAT AUG 3 1996 ...THUNDERSTORMS WERE RUMBLING OVER PARTS OF SOUTHEAST WYOMING... SCATTERED THUNDERSTORMS HAD DEVELOPED OVER SOUTHEAST WYOMING NORTH OF INTERSTATE 80 EARLY THIS AFTERNOON. MOST OF THE STORMS WERE ALONG AND NORTH OF A LINE FROM RAWLINS TO TORRINGTON. THE THUNDERSTORMS WERE MOVING NORTHEAST AROUND 30 MPH. AT 215 PM MDT...THE STRONGEST THUNDERSTORMS WERE LOCATED 15 MILES NORTH OF WHEATLAND AND 30 MILES NORTHEAST OF DOUGLAS. OTHER STRONG STORMS WERE 25 MILES NORTHEAST AND 20 MILES NORTHWEST OF RAWLINS. THESE STRONGER THUNDERSTORMS WERE LIKELY PRODUCING WIND GUSTS BETWEEN 40 AND 50 MPH...DEADLY LIGHTNING AND POSSIBLY SOME SMALL HAIL. THUNDERSTORMS WILL CONTINUE OVER SOUTHEAST WYOMING WELL INTO THE EVENING HOURS. PEOPLE IN SOUTHEAST WYOMING SHOULD BE ALERT FOR THUNDERSTORM DEVELOPMENT. BE READY TO SEEK SHE0LTER IF A STORM APPROACHES YOUR LOCATION. WCJIN-WYSE-WYNE JLH
Special weather statement, Aug 3, 3:23 PM MDT, 18 minutes before
NEZ001-002-003-019-020-021-032230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 322 PM MDT SAT AUG 3 1996 ...THUNDERSTORMS WERE RUMBLING OVER PARTS OF THE NEBRASKA PANHANDLE... SCATTERED THUNDERSTORMS HAD DEVELOPED OVER WESTERN NEBRASKA THIS AFTERNOON. MOST OF THE STORMS WERE ALONG AND NORTH OF A LINE FROM SCOTTSBLUFF TO ALLIANCE. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MPH. AT 320 PM MDT...THE STRONGEST THUNDERSTORMS WERE LOCATED 35 MILES NORTH OF SCOTTSBLUFF AND 55 MILES NORTH OF SCOTTSBLUFF. THESE STRONGER THUNDERSTORMS WERE LIKELY PRODUCING WIND GUSTS BETWEEN 40 AND 50 MPH...DEADLY LIGHTNING AND POSSIBLY SOME SMALL HAIL. THUNDERSTORMS WILL CONTINUE OVER THE NEBRASKA PANHANDLE WELL INTO THE EVENING HOURS. PEOPLE IN WESTERN NEBRASKA SHOULD BE ALERT FOR THUNDERSTORM DEVELOPMENT. BE READY TO SEEK SHELTER IF A STORM APPROACHES YOUR LOCATION. ROBINSON
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 7:56 PM MDT | Tornado Warning | CYS | Box Butte | 34 min |
| Aug 2, 8:02 PM MDT | Tornado Warning | CYS | Box Butte | 28 min |
| Aug 2, 8:13 PM MDT | Severe Thunderstorm Warning | CYS | Morrill | 32 min |
| Aug 2, 8:30 PM MDT | Tornado Warning | CYS | Box Butte | 15 min |
| Aug 2, 8:30 PM MDT | Tornado Warning | CYS | Morrill | 30 min |
| Aug 2, 8:45 PM MDT | Tornado Warning | CYS | Box Butte | 15 min |
| Aug 3, 3:41 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 19 min |
| Aug 3, 4:05 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte | 25 min |
| Aug 3, 4:29 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte | 31 min |
| Aug 3, 5:15 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte | 45 min |
Nearby
Flash Flood Warnings in Nebraska, 1996Every flash flood warning in 1996
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.