Alert archive / Nebraska / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 241, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Sep 4, 2013, 5:02 PM MDT for Box Butte County, Nebraska. It was in force for 28 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
- Sep 4, 2013, 5:02 PM MDT (23:02 UTC)
- Expired
- Sep 4, 2013, 5:30 PM MDT
- In force
- 28 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Box Butte County, NE
The radar
The Cheyenne radar (KCYS), 186 km from the middle of the area, began a volume at 23:02 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 (KRAP), launched 12:00Z, 11.0 hours before the alert went out and 206 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
- 506 J/kg
- Mixed-layer CIN
- -246 J/kg
- Mixed-layer LCL
- 1330 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
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 Sep 4, 4:24 PM MDT, 38 minutes earlier.
Area forecast discussion, Sep 4, 4:24 PM MDT, 38 minutes before
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</html>Hazardous weather outlook, Sep 4, 4:39 PM MDT, 23 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 439 PM MDT WED SEP 4 2013 WYZ101>119-052245- CONVERSE COUNTY LOWER ELEVATIONS-NIOBRARA COUNTY- NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS- SHIRLEY BASIN-CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- EAST PLATTE COUNTY-GOSHEN COUNTY-CENTRAL CARBON COUNTY- NORTH SNOWY RANGE FOOTHILLS-SOUTHWEST CARBON COUNTY- SIERRA MADRE RANGE-UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE- LARAMIE VALLEY-SOUTH LARAMIE RANGE-SOUTH LARAMIE RANGE FOOTHILLS- CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY- 439 PM MDT WED SEP 4 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL WYOMING... SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS PORTIONS OF SOUTHEAST WYOMING THROUGH THE EVENING. HEAVY RAINFALL WILL BE THE PRIMARY HAZARD AS THESE STORMS WILL NOT BE MOVING FAST. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY ISOLATED TO SCATTERED AFTERNOON AND EVENING THUNDERSTORMS WILL DEVELOP MOST DAYS. THE THUNDERSTORMS ARE NOT EXPECTED TO PRODUCE SEVERE WEATHER. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE REQUIRED THROUGH TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ002-003-019>021-054-055-095-096-052245- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX- 439 PM MDT WED SEP 4 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE. .DAY ONE...TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH THE EVENING OVER THE NEBRASKA PANHANDLE. WHILE WIDESPREAD SEVERE STORMS ARE NOT EXPECTED...THE STRONGEST STORMS COULD PRODUCE QUARTER SIZED HAIL AND GUSTY WINDS TO 50 MPH. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY ISOLATED AFTERNOON AND EVENING THUNDERSTORMS WILL DEVELOP MOST DAYS. THE THUNDERSTORMS ARE NOT EXPECTED TO PRODUCE SEVERE WEATHER. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE REQUIRED THROUGH TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE FINCH
In the hours before
Special weather statement, Sep 4, 3:12 PM MDT, 1 hour 50 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 312 PM MDT WED SEP 4 2013 NEZ002-003-095-096-042200- BOX BUTTE NE-DAWES NE-NORTH SIOUX NE-SOUTH SIOUX NE- 312 PM MDT WED SEP 4 2013 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SIOUX...EXTREME SOUTHWESTERN DAWES AND NORTHWESTERN BOX BUTTE COUNTIES UNTIL 400 PM MDT... AT 310 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM HARRISON TO 5 MILES NORTH OF WATSON RANCH...AND MOVING TO THE SOUTHEAST AT 10 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... WATSON RANCH... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. && LAT...LON 4230 10330 4213 10373 4262 10399 4279 10369 TIME...MOT...LOC 2112Z 329DEG 8KT 4265 10384 4229 10362 MSW
Local storm report, Sep 4, 3:33 PM MDT, 1 hour 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
333 PM MDT WED SEP 04 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0322 PM HAIL 13 SSE HARRISON 42.51N 103.78W
09/04/2013 M0.50 INCH SIOUX NE TRAINED SPOTTER
&&
MWEILANDSpecial weather statement, Sep 4, 3:35 PM MDT, 1 hour 27 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 335 PM MDT WED SEP 4 2013 WYZ106-115>117-042215- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY WY-LARAMIE VALLEY WY-SOUTH LARAMIE RANGE WY-SOUTH LARAMIE RANGE FOOTHILLS WY- 335 PM MDT WED SEP 4 2013 ...SIGNIFICANT WEATHER ADVISORY FOR EXTREME SOUTHWESTERN PLATTE... NORTHWESTERN LARAMIE AND EASTERN ALBANY COUNTIES UNTIL 415 PM MDT... AT 333 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 5 MILES NORTHEAST OF BALDY PEAK TO UNIVERSITY OF WYOMING WAR MEMORIAL STADIUM...AND MOVING EAST AT 10 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... TIE CITY CAMPGROUND... YELLOW PINE CAMPGROUND... IRON MOUNTAIN... HORSE CREEK... NORTH CROW CAMPGROUND... THIS INCLUDES INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 307 AND 323. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. && LAT...LON 4167 10510 4119 10523 4127 10570 4168 10553 TIME...MOT...LOC 2135Z 281DEG 7KT 4160 10542 4135 10556 MSW
Special weather statement, Sep 4, 4:00 PM MDT, 1 hour 2 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 400 PM MDT WED SEP 4 2013 NEZ002-003-021-095-096-042245- BOX BUTTE NE-DAWES NE-MORRILL NE-NORTH SIOUX NE-SOUTH SIOUX NE- 400 PM MDT WED SEP 4 2013 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL SIOUX...NORTHERN MORRILL...SOUTHWESTERN DAWES AND BOX BUTTE COUNTIES UNTIL 445 PM MDT... AT 355 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES SOUTHEAST OF HARRISON TO 7 MILES EAST OF KILPATRICK LAKE...AND MOVING SOUTHEAST AT 5 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... ALLIANCE... KILPATRICK LAKE... AGATE FOSSIL BEDS NATIONAL MONUMENT... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. && LAT...LON 4209 10280 4191 10319 4256 10402 4272 10353 TIME...MOT...LOC 2159Z 333DEG 4KT 4259 10375 4208 10314 MSW
Special weather statement, Sep 4, 4:34 PM MDT, 28 minutes before
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</html>Special weather statement, Sep 4, 4:57 PM MDT, 5 minutes before
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</html>The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 2:22 PM MDT | Special Weather Statement | CYS | Albany | 38 min |
| Sep 4, 3:35 PM MDT | Special Weather Statement | CYS | Albany | 40 min |
| Sep 4, 5:14 PM MDT | Special Weather Statement | CYS | Platte | 46 min |
| Sep 4, 2:44 PM MDT | Special Weather Statement | CYS | Sioux | 46 min |
| Sep 4, 3:12 PM MDT | Special Weather Statement | CYS | Sioux | 48 min |
| Sep 4, 4:00 PM MDT | Special Weather Statement | CYS | Box Butte, Sioux | 45 min |
| Sep 4, 4:04 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes, Sioux | 41 min |
| Sep 4, 4:34 PM MDT | Special Weather Statement | CYS | Box Butte | 41 min |
| Sep 4, 4:39 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte | 51 min |
| Sep 4, 4:57 PM MDT | Special Weather Statement | CYS | Banner | 48 min |
| Sep 4, 5:15 PM MDT | Special Weather Statement | CYS | Banner | 45 min |
| Sep 4, 5:17 PM MDT | Special Weather Statement | CYS | Morrill | 43 min |
| Sep 4, 5:20 PM MDT | Special Weather Statement | CYS | Box Butte | 40 min |
| Sep 4, 5:27 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill | 48 min |
| Sep 4, 5:30 PM MDT | Special Weather Statement | CYS | Cheyenne | 45 min |
| Sep 4, 5:47 PM MDT | Special Weather Statement | CYS | Morrill | 43 min |
| Sep 4, 5:57 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 48 min |
| Sep 4, 5:58 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 47 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2013Every severe thunderstorm warning in 2013
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.