Alert archive / Wyoming / Tornado Warnings in 1996
Tornado Warning 27, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jul 31, 1996, 2:40 PM MDT for Goshen County, Wyoming. It was in force for 50 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, 2:40 PM MDT (20:40 UTC)
- Expired
- Jul 31, 1996, 3:30 PM MDT
- In force
- 50 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Goshen County, WY
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 8.7 hours before the alert went out and 251 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 312040 TORCYS WYC015-312130- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 240 PM MDT WED JUL 31 1996 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 330 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST WYOMING ...SOUTHWESTERN GOSHEN COUNTY AT 235 PM DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH THE POTENTIAL TO PRODUCE A TORNADO. THE STORM WAS LOCATED 8 MILES NORTHEAST OF CHUGWATER OR 20 MILES SOUTHEAST OF WHEATLAND. THIS THUNDERSTORM WAS MOVING TO THE SOUTHEAST AT 25 MILES. THIS THUNDERSTORM COULD PRODUCE A TORNADO AT ANY MOMENT! REMEMBER THAT THE AREA IS UNDER A TORNADO WATCH UNTIL 900 PM. IF YOU ARE IN A CAR OR MOBILE HOME...ABANDON IT! GO IN A NEARBY STURDY BUILDING! AS A LAST RESORT LIE FLAT IN A DITCH AND COVER YOUR HEAD. WCJIN-WYSE LRE
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, 5 hours 21 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, 2 hours 23 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
Special weather statement, Jul 31, 2:23 PM MDT, 17 minutes before
NEZ001-019-020-054-312115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 216 PM MDT WED JUL 31 1996 A NUMBER OR SEVERE THUNDERSTORMS HAVE DEVELOPED OVER THE EAST WYOMING PLAINS THIS AFTERNOON. A TORNADO WARNING RMAINS IN EFFECT OF STORMS IN NIOBRARA COUNTY WYOMING. A SEVERE THUNDERSTORMS WARNING IS CURRENTLY IN EFFECT FOR A STORM IN SOUTHERN GOSHEN COUNTY WYOMING. STRONG STORMS WERE ALSO INDICATED IN EASTERN LARAMIE COUNTY. THESE STOTRMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR AND WILL ENTER SIOUX...SCOTTS BLUFF AND KIMBALL COUNTIES BETWEEN 230 TO 300 PM. A TORNADO WATCH REMAINS IN EFFECT FOR THE NEBRASKA PANHANDLE UNTIL 9 PM MDT. 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, 2:04 PM MDT | Tornado Warning | CYS | Niobrara | 56 min |
| Jul 31, 2:28 PM MDT | Tornado Warning | CYS | Converse | 32 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.