Alert archive / Wyoming / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 65, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 14, 2004, 12:23 AM MDT for Goshen County, Wyoming; Sioux County, Nebraska. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 14, 2004, 12:23 AM MDT (06:23 UTC)
- Expired
- Jul 14, 2004, 1:00 AM MDT
- In force
- 37 min
- Issued by
- NWS Cheyenne, WY
- Area
- Counties, with a storm outline in the text
Counties Sioux County, NE, Goshen County, WY
The radar
The Cheyenne radar (KCYS), 156 km from the middle of the area, began a volume at 06:26 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 6.4 hours before the alert went out and 205 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
- 145 J/kg
- Mixed-layer CIN
- -391 J/kg
- Mixed-layer LCL
- 2292 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KCYS 140623 SVRCYS NEC165-WYC015-140700- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 1223 AM MDT WED JUL 14 2004 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WEST CENTRAL SIOUX COUNTY IN THE PANHANDLE OF NEBRASKA NORTHEASTERN GOSHEN COUNTY IN SOUTHEAST WYOMING * UNTIL 100 AM MDT * AT 1217 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 9 MILES SOUTH OF PRAIRIE CENTER...OR ABOUT 22 MILES NORTH OF TORRINGTON...AND MOVING NORTHEAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... RURAL WESTERN SIOUX COUNTY AT 1240 AM MDT RURAL NORTHEASTERN GOSHEN COUNTY AT 1240 AM MDT LAT...LON 4256 10432 4213 10427 4229 10372 4267 10377 $$ WEILAND
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.
NWS Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 13, 9:08 PM MDT, 3 hours 15 minutes earlier.
Area forecast discussion, Jul 13, 9:08 PM MDT, 3 hours 15 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 908 PM MDT TUE JUL 13 2004 .DISCUSSION...WILL UPDATE FORECAST MAINLY TO REMOVE SEVERE THUNDERSTORM WATCH. SEVERAL STRONG STORMS DEVELOPED THIS EVENING... BUT WE HAVE ONLY RECEIVED ONE REPORT OF SEVERE WEATHER SO FAR (NORTHEASTERN GOSHEN COUNTY). DESCENDING MOTION FROM UPPER HIGH CENTERED OVER NORTHEAST COLORADO COUNTERED A VERY UNSTABLE AIR MASS AND MAIN THREAT FROM STORMS WAS HEAVY RAIN. .CYS WATCHES/WARNINGS/ADVISORIES... WY...NONE. NE...NONE. POMEROY
Hazardous weather outlook, Jul 13, 9:26 AM MDT, 14 hours 57 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 926 AM MDT TUE JUL 13 2004 NEZ001>003-019>021-054-055-WYZ059>070-141145- BANNER-BOX BUTTE-CHEYENNE-CHEYENNE FOOTHILLS-CONVERSE-DAWES-GOSHEN- KIMBALL-LARAMIE RANGE-LARAMIE VALLEY-MORRILL-NIOBRARA-NORTH CARBON- NORTH LARAMIE RANGE-PINE BLUFFS-PLATTE-SCOTTS BLUFF-SIOUX- SNOWY RANGE-SOUTHWEST CARBON- INCLUDING THE CITIES OF...ALLIANCE...CHADRON...CHEYENNE...DOUGLAS... KIMBALL...LARAMIE...LUSK...RAWLINS...SCOTTSBLUFF...SIDNEY... TORRINGTON AND WHEATLAND 926 AM MDT TUE JUL 13 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEASTERN WYOMING AND THE WESTERN NEBRASKA PANHANDLE. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING EAST OF A LINE FROM DOUGLAS TO CHEYENNE. ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND CONTINUE THIS EVENING. A FEW THUNDERSTORMS MAY BECOME SEVERE ACROSS THE SLIGHT RISK AREA...PRODUCING LARGE HAIL OR DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY SCATTERED THUNDERSTORMS WILL OCCUR WEDNESDAY AFTERNOON AND EVENING. A FEW STORMS MAY BECOME SEVERE ALONG AND EAST OF THE WYOMING-NEBRASKA STATE LINE. ISOLATED TO SCATTERED THUNDERSTORMS ARE POSSIBLE IN MOST AREAS DURING THE AFTERNOONS AND EVENINGS FROM THURSDAY THROUGH MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED LATE THIS AFTERNOON AND EVENING EAST OF THE LARAMIE RANGE. KMD
In the hours before
Local storm report, Jul 13, 8:27 PM MDT, 3 hours 56 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
827 PM MDT TUE JUL 13 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0720 PM HAIL 10 SE PRAIRIE CENTER 42.51N 104.20W
07/13/2004 0.75 INCH GOSHEN WY PUBLIC
&&
JRSpecial weather statement, Jul 13, 9:05 PM MDT, 3 hours 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 905 PM MDT TUE JUL 13 2004 NEZ001>003-019>021-054-055-WYZ059-060-063>070-140330- BANNER-BOX BUTTE-CHEYENNE-CHEYENNE FOOTHILLS-CONVERSE-DAWES-GOSHEN- KIMBALL-LARAMIE RANGE-LARAMIE VALLEY-MORRILL-NIOBRARA- NORTH LARAMIE RANGE-PINE BLUFFS-PLATTE-SCOTTS BLUFF-SIOUX- SNOWY RANGE- INCLUDING THE CITIES OF...ALLIANCE...CHADRON...CHEYENNE...DOUGLAS... KIMBALL...LARAMIE...LUSK...SCOTTSBLUFF...SIDNEY... TORRINGTON AND WHEATLAND 905 PM MDT TUE JUL 13 2004 ...SEVERE THUNDERSTORM WATCH HAS EXPIRED... AT 900 PM MDT...THE THREAT OF SEVERE WEATHER HAD DIMINISHED ACROSS SOUTHEASTERN WYOMING...SOUTH CENTRAL WYOMING AND THE WESTERN PANHANDLE OF NEBRASKA. FOR THAT REASON...THE SEVERE THUNDERSTORM WATCH THAT HAD BEEN IN EFFECT HAS BEEN ALLOWED TO EXPIRE.
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 7:07 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 38 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2004Severe Thunderstorm Warnings in Nebraska, 2004Every severe thunderstorm warning in 2004
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.