Alert archive / Wyoming / Tornado Warnings in 1993
Tornado Warning 23, NWS Cheyenne, WY
NWS Cheyenne, WY issued this tornado warning at Jul 20, 1993, 1:45 PM MDT for Big Horn County, Wyoming. It was in force for 15 min.
The area
The counties it named.
The facts
- Issued
- Jul 20, 1993, 1:45 PM MDT (19:45 UTC)
- Expired
- Jul 20, 1993, 2:00 PM MDT
- In force
- 15 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Big Horn County, WY
The nearest sounding before it
Lander/Hunt Fiel, WY (KLND), launched 12:00Z, 7.8 hours before the alert went out and 198 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2080 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 148 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 KSHR 201945 TORSHR WYC003-202015- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SHERIDAN WY 145 PM MDT TUE JUL 20 1993 THE NATIONAL WEATHER SERVICE IN SHERIDAN HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 215 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL WYOMING ...CENTRAL BIG HORN COUNTY ...THIS WARNING INCLUDES THE TOWN OF EMBLEM... THE BIG HORN COUNTY SHERIFFS DEPARTMENT REPORTED A TORNADO IN EMBLEM ...17 MILES WEST OF GREYBULL. THIS TORNADO HAD ALREADY DAMAGED A BUILDING IN EMBLEM AS IT MOVED NORTHEAST. PEOPLE IN THE PATH OF THIS TWISTER NEED TO ACT NOW! IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS... OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS. EVANS & NNNN
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 20, 12:30 PM MDT, 1 hour 15 minutes before
NEZ001-005-011-201815- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 1230 PM MDT TUE JUL 20 1993 ...A LONE THUNDERSTORM OVER SOUTHERN SHERIDAN/NORTHERN GARDEN COUNTIES OF THE NEBRASKA PANHANDLE... AT 1228 PM MDT...A LONE ISOLATED THUNDERSTORM WAS OVER EXTREME SOUTHERN SHERIDAN AND EXTREME NORTHERN GARDEN COUNTIES OF THE NEBRASKA PANHANDLE. THIS STORM WAS MOVING TO THE EAST AT 25 MPH. BRIEF HEAVY RAIN...SMALL HAIL AND DANGEROUS LIGHTNING WILL BE POSSIBLE WITH THIS STORM AS IT MOVES EAST ACROSS SHERIDAN & GARDEN COUNTIES UNTIL 115 PM MDT. KIRK
Special weather statement, Jul 20, 1:07 PM MDT, 38 minutes before
WYZ066>069-201915- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 110 PM MDT MON JUL 19 1993 ...THUNDERSTORMS HAVE DEVELOPED OVER THE LARAMIE MOUNTAINS SOUTHWEST OF WHEATLAND... AT 100 PM MDT...RADAR INDICATED STRONG THUNDERSTORMS HAD DEVELOPED OVER EASTERN ALBANY COUNTY. THEY WERE OVER THE SYBILLE CANYON AREA WHICH IS ROUTE 34 NORTHEAST OF BOSLER. THESE STORMS LIKELY ARE PRODUCING HALF INCH HAIL AND WIND GUSTS TO 45 MILES AN HOUR. ANOTHER THREAT IS LOCALLY HEAVY RAIN IN THE CANYON WHICH COULD PRODUCE SOME FLASH FLOODING OF SMALL STREAMS. THE STORMS WERE MOVING NORTHEAST AT 20 MILES AN HOUR. THIS SPEED WOULD PUT THE STORMS IN WESTERN PLATTE COUNTY...SOUTHWEST OF WHEATLAND BY 2 PM MDT. > PEOPLE TRAVELING THE SYBILLE CANYON AREA SHOULD BE PREPARED FOR REDUCED VISIBILITY AND HAIL AS THEY DRIVE THROUGH THE STORMS. IF YOU ENCOUNTER SUCH CONDITIONS...DO THE SAFE THING...AND FIND A SPOT TO PULL OVER UNTIL THE THREATz IS PAST. BE ON THE LOOKOUT FOR LOCALIZED FLASH FLOODING. WCJIN-WYSE CAS
Special weather statement, Jul 20, 1:30 PM MDT, 15 minutes before
WYZALL-202030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 130 PM MDT TUE JUL 20 1993 ...A TORNADO WATCH HAS BEEN ISSUED FOR NORTH-CENTRAL AND EASTERN WYOMING... A TORNADO WATCH HAS BEEN ISSUED FOR NORTH-CENTRAL AND EASTERN WYOMING UNTIL 800PM THIS TUESDAY EVENING. THE COUNTIES INCLUDED IN THE WATCH ARE...EASTERN BIG HORN... JOHNSON...SHERIDAN...EASTERN WASHAKIE...CAMPBELL...CROOK...WESTON ...NATRONA...CONVERSE...NIOBRARA...ALBANY...GOSHEN...PLATTE AND LARAMIE COUNTIES. SOME CITIES INCLUDED IN THE WATCH ARE...BASIN...BUFFALO...CASPER ...CHEYENNE...DOUGLAS...GILLETTE...LARAMIE...LUSK...NEWCASTLE... SHERIDAN...SUNDANCE...TORRINGTON...WHEATLAND AND WORLAND. < AS OF 130PM THERE HAVE BEEN NO REPORTS OF SEVERE WEATHER IN THE WATCH AREA. SEVERAL STRONG THUNDERSTORM CONTINUED IN EXTREME EASTERN ALBANY COUNTY. ONE STORM WAS 30 MILES NORTHEAST OF LARAMIE...THE SECOND 40 MILES NORTHEAST OF LARAMIE AND A THIRD 55 MILES NORTHEAST OF LARAMIE. THE STORMS WERE MOVING TO THE NORTHEAST AT 20 MILES AN HOUR AND WILL BE IN WESTERN PLATTE COUNTY BY 200PM. BRIEF HEAVY RAIN...STRONG GUSTY WINDS...HAIL AND DEADLY LIGHTNING SHOULD BE EXPECTED WITH THESE STORMS. BE PREPARED TO MOVE TO SAFETY QUICKLY IF THE NEED ARISES. LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. WCJIN-WYNW-WYNE-WYSE COX
Special weather statement, Jul 20, 1:30 PM MDT, 15 minutes before
NEZ001-005-011-202030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 130 PM MDT TUE JUL 20 1993 ...TORNADO WATCH UNTIL 8 PM MDT FOR SIOUX...SCOTTS BLUFF...BANNER... KIMBALL AND CHEYENNE COUNTIES OF THE NEBRASKA PANHANDLE... ...A LONE THUNDERSTORM WAS OVER THE SHERIDAN/GARDEN COUNTY LINE... AT 128 PM MDT...A LONE THUNDERSTORM WAS OVER EXTREME SOUTHERN SHERIDAN AND EXTREME NORTHERN GARDEN COUNTIES OF THE NEBRASKA PANHANDLE. THIS STORM WAS 20 MILES SOUTHEAST OF ALLIANCE NEBRASKA AND WAS MOVING TO THE NORTHEAST AT 20 MPH. WITH THE NORTHEAST MOVMENT...THE STORM WILL BE OUT OF GARDEN COUNTY BY 145 PM MDT. BRIEF HEAVY RAIN...SMALL HAIL AND DANGEROUS LIGHTNING WILL BE POSSIBLE WITH THIS STORM AS IT MOVES NORTHEAST ACROSS SOUTHERN SHERIDAN COUNTY UNTIL 230 PM MDT. KIRK
Special weather statement, Jul 20, 1:33 PM MDT, 12 minutes before
WYZALL-202030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 130 PM MDT TUE JUL 20 1993 ...A TORNADO WATCH HAS BEEN ISSUED FOR NORTH-CENTRAL AND EASTERN WYOMING... A TORNADO WATCH HAS BEEN ISSUED FOR NORTH-CENTRAL AND EASTERN WYOMING UNTIL 800PM THIS TUESDAY EVENING. THE COUNTIES INCLUDED IN THE WATCH ARE...EASTERN BIG HORN... JOHNSON...SHERIDAN...EASTERN WASHAKIE...CAMPBELL...CROOK...WESTON ...NATRONA...CONVERSE...NIOBRARA...ALBANY...GOSHEN...PLATTE AND LARAMIE COUNTIES. SOME CITIES INCLUDED IN THE WATCH ARE...BASIN...BUFFALO...CASPER ...CHEYENNE...DOUGLAS...GILLETTE...LARAMIE...LUSK...NEWCASTLE... SHERIDAN...SUNDANCE...TORRINGTON...WHEATLAND AND WORLAND. < AS OF 130PM THERE HAVE BEEN NO REPORTS OF SEVERE WEATHER IN THE WATCH AREA. SEVERAL STRONG THUNDERSTORM CONTINUED IN EXTREME EASTERN ALBANY COUNTY. ONE STORM WAS 30 MILES NORTHEAST OF LARAMIE...THE SECOND 40 MILES NORTHEAST OF LARAMIE AND A THIRD 55 MILES NORTHEAST OF LARAMIE. THE STORMS WERE MOVING TO THE NORTHEAST AT 20 MILES AN HOUR AND WILL BE IN WESTERN PLATTE COUNTY BY 200PM. BRIEF HEAVY RAIN...STRONG GUSTY WINDS...HAIL AND DEADLY LIGHTNING SHOULD BE EXPECTED WITH THESE STORMS. BE PREPARED TO MOVE TO SAFETY QUICKLY IF THE NEED ARISES. LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. WCJIN-WYNW-WYNE-WYSE COX
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 6:11 PM MDT | Tornado Warning | CYS | Johnson | 34 min |
| Jul 19, 6:21 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 25 min |
| Jul 19, 6:52 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 38 min |
| Jul 19, 7:12 PM MDT | Severe Thunderstorm Warning | CYS | Sheridan | 31 min |
| Jul 19, 7:45 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 45 min |
| Jul 19, 8:22 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 53 min |
| Jul 19, 9:15 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 30 min |
Nearby
Tornado Warnings in Wyoming, 1993Every tornado warning in 1993Tornadoes 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.