Alert archive / Wyoming / Tornado Warnings in 1996
Tornado Warning 25, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jul 31, 1996, 2:04 PM MDT for Niobrara County, Wyoming. It was in force for 56 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
- Jul 31, 1996, 2:04 PM MDT (20:04 UTC)
- Expired
- Jul 31, 1996, 3:00 PM MDT
- In force
- 56 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Niobrara County, WY
The radar
The Rapid City radar (KUDX), 178 km from the middle of the area, began a volume at 20:07 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, 8.1 hours before the alert went out and 171 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
- 30 J/kg
- Mixed-layer CIN
- -101 J/kg
- Mixed-layer LCL
- 669 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 312007 TORCYS WYC027-312100- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 204 PM MDT WED JUL 31 1996 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 300 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN EAST CENTRAL WYOMING ...NIOBRARA COUNTY AT 2 PM MDT...DOPPLER RADAR INDICATED SEVERAL SEVERE THUNDERSTORMS OVER NORTHERN NIOBRARA. ONE OVER NORTHWEST AND ANOTHER OVER NORTHEAST NIOBRARA COUNTIES. SEVERAL FUNNEL CLOUDS WERE REPORTED FROM THE NORTHEAST NIOBRARA STORM. A THIRD THUNDERSTORM INDICATED SEVERE OVER WEST CENTRAL NIOBRARA COUNTY 11 WEST SOUTHWEST OF LANCE CREEK. ROTATION WAS DETECTED IN THE STORMS. THE STORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR. DOPPLER RADAR DETECTED STRONG ROTATION IN THESE STORM. ANY ONE OF THE STORMS HAS THE POTENTIAL TO PRODUCE A TORNADO AT ANY MOMENT! GO TO SAFE SHELTER WHEN THREATENING WEATHER APPROACHE"S. WCJIN-WYNE PAL
What forecasters said that day
The local office's own words before this tornado 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, Jul 31, 9:19 AM MDT, 4 hours 45 minutes before
WYZ059>070-NEZ001>003-019>021-054-055-312300-
SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
920 AM MDT WED JUL 31 1996
THE SEVERE WEATHER POTENTIAL IN THE COUNTY WARNING AREA OF THE CHEYENNE
NATIONAL WEATHER SERVICE OFFICE IS MEDIUM THIS AFTERNOON AND
EVENING...MAINLY IN THE NEBRASKA PANHANDLE.
SPOTTER ACTIVATION MAY BE NECESSARY FOR THE NEBRASKA PANHANDLE.
DISCUSSION...THE AIRMASS OVER SOUTHEAST WYOMING IS EXPECTED TO DRY OUT
SOME DURING THE DAY AS A SURFACE LOWS PRESSURE TROUGH MOVES E OF THE
STATE WITH DOWNSLOPE WESTERLY FLOW DEVELOPING AT THE SURFACE DURING THE
AFTERNOON. THE AIRMASS OVER THE NEBRASKA WILL REMAIN MOIST TODAY AS
SOUTHEAST UPSLOPE WINDS KEEP DEW POINTS IN THE UPPER 50S. BETTER
INSTABILITIES AND CONVECTIVE POTENTIAL ENERGY ARE PROGED OVER THE
NEBRASKA PANHANDLE THIS AFTERNOON AND EVENING. THE WIND PROFILE WILL
ALSO REMAIN FAVORABLE FOR THE FORMATION OF SOME SUPER CELLS OVER THE
NEBRASKA PANHANDLE.
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
STCOTTS BLUFF
WCJIN-WYSE-WYNE
PALSpecial weather statement, Jul 31, 12:17 PM MDT, 1 hour 47 minutes before
WYZ059-064-066-067-069-070-311900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1210 PM MDT WED JUL 31 1996 AT 1205 PM MDT...DOPPLER RADAR INDICATED THUNDERSTORMS DEVELOPING OVER EAST CENTRAL AND SOUTHEAST WYOMING. ONE STORM THAT DEVELOPED OVER EASTERN NATRONA COUNTY WAS MOVING INTO THE WEST END OF CONVERSE COUNTY AND WAS LOCATED 15 MILES WEST OF GLENROCK OR 35 MILES WEST NORTHWEST OF DOUGLAS. A SECOND STRONG THUNDERSTORM WAS LOCATED 25 MILES NORTHWEST OF WHEATLAND IN PLATTE COUNTY. A THIRD STORM WAS LOCATED OVER NORTH CHEYENNE. THIS STORM WAS PRODUCING SMALL HAIL...1/2 INCH IN DIAMETER. STORMS WERE MOVING TO THE SOUTHEAST AT 20 MILES AN HOUR. SMALL HAIL...XBRIEF HEAVY RAIN...DANGEROUS LIGHTNING AND GUSTY WINDS TO 45 MILES AN HOUR CAN BE EXPECTED WITH THESE STORMS UNTIL 115 PM. WCJIN-WYSE-WYNE PAL
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 6:44 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 31 min |
| Jul 30, 7:04 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 26 min |
| Jul 31, 1:43 PM MDT | Severe Thunderstorm Warning | CYS | Converse | 62 min |
| Jul 31, 2:00 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 60 min |
| Jul 31, 2:28 PM MDT | Tornado Warning | CYS | Converse | 32 min |
| Jul 31, 2:40 PM MDT | Tornado Warning | CYS | Goshen | 50 min |
| Jul 31, 2:52 PM MDT | Tornado Warning | CYS | Laramie | 38 min |
| Jul 31, 3:07 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Niobrara | 68 min |
| Jul 31, 3:28 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 47 min |
| Jul 31, 3:35 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 40 min |
Nearby
Tornado Warnings in Wyoming, 1996Every tornado warning in 1996Tornadoes 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.