Alert archive / Nebraska / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 117, NWS Cheyenne, WY

June 25, 2015Box Butte County, Dawes County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 25, 2015, 12:22 PM MDT for Box Butte County, Dawes County, Nebraska. It was in force for 38 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: Jun 25, 2015, 12:22 PM MDT (18:22 UTC)
Expired: Jun 25, 2015, 1:00 PM MDT
In force: 38 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Box Butte County, NE, Dawes County, NE

The radar

The Rapid City radar (KUDX), 185 km from the middle of the area, began a volume at 18:23 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, 6.4 hours before the alert went out and 179 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 404 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

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 Jun 25, 12:09 PM MDT, 13 minutes earlier.

Area forecast discussion, Jun 25, 12:09 PM MDT, 13 minutes before

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Hazardous weather outlook, Jun 25, 6:38 AM MDT, 5 hours 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
638 AM MDT THU JUN 25 2015

NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-116>119-
261030-
DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE-
NORTH SIOUX-SOUTH SIOUX-CONVERSE COUNTY LOWER ELEVATIONS-
NIOBRARA COUNTY-NORTH LARAMIE RANGE-
CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY-
EAST PLATTE COUNTY-GOSHEN COUNTY-SOUTH LARAMIE RANGE-
SOUTH LARAMIE RANGE FOOTHILLS-CENTRAL LARAMIE COUNTY-
EAST LARAMIE COUNTY-
638 AM MDT THU JUN 25 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN
NEBRASKA...EAST CENTRAL WYOMING AND SOUTHEAST WYOMING.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED TO FORM THIS AFTERNOON AND
PROGRESS GENERALLY EAST OR SOUTHEAST THROUGH THIS EVENING. SOME
STORMS MAY BE COME SEVERE WITH LARGE HAIL AND DAMAGING WINDS BEING
THE MAIN THREATS ESPECIALLY IN THE SOUTHERN PANHANDLE. LOCALLY HEAVY
RAIN IS ALSO POSSIBLE.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

ISOLATED MAINLY LATE DAY THUNDERSTORMS ARE POSSIBLE MAINLY FRIDAY
AND AGAIN ON TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

WYZ105-110-114-115-261030-
SHIRLEY BASIN-NORTH SNOWY RANGE FOOTHILLS-SNOWY RANGE-
LARAMIE VALLEY-
638 AM MDT THU JUN 25 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
WYOMING AND SOUTHEAST WYOMING.

.DAY ONE...TODAY AND TONIGHT

ISOLATED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON INTO THIS
EVENING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

ISOLATED MAINLY LATE DAY THUNDERSTORMS ARE POSSIBLE MAINLY FRIDAY
AND TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

WYZ104-109-111>113-261030-
FERRIS/SEMINOE/SHIRLEY MOUNTAINS-CENTRAL CARBON COUNTY-
SOUTHWEST CARBON COUNTY-SIERRA MADRE RANGE-
UPPER NORTH PLATTE RIVER BASIN-
638 AM MDT THU JUN 25 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
WYOMING.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

In the hours before

Local storm report, Jun 25, 9:19 AM MDT, 3 hours 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
919 AM MDT THU JUN 25 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0918 AM     HAIL             17 NE DOUGLAS           42.93N 105.16W
06/25/2015  E1.00 INCH       CONVERSE           WY   TRAINED SPOTTER

&&

RCOX

Local storm report, Jun 25, 10:52 AM MDT, 1 hour 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1052 AM MDT THU JUN 25 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1052 AM     HAIL             11 N CRAWFORD           42.84N 103.41W
06/25/2015  E0.50 INCH       DAWES              NE   TRAINED SPOTTER

&&

RCOX

Special weather statement, Jun 25, 11:58 AM MDT, 24 minutes before

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Special weather statement, Jun 25, 12:00 PM MDT, 22 minutes before

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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 24, 6:32 PM MDT	Special Weather Statement	CYS	Converse	43 min
Jun 24, 7:11 PM MDT	Special Weather Statement	CYS	Converse	34 min
Jun 24, 8:14 PM MDT	Special Weather Statement	CYS	Platte	46 min
Jun 24, 10:06 PM MDT	Special Weather Statement	CYS	Goshen	24 min
Jun 24, 10:13 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Platte	27 min
Jun 25, 1:27 AM MDT	Special Weather Statement	CYS	Converse	63 min
Jun 25, 2:12 AM MDT	Special Weather Statement	CYS	Converse	48 min
Jun 25, 2:27 AM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara	63 min
Jun 25, 2:47 AM MDT	Special Weather Statement	CYS	Converse	43 min
Jun 25, 3:35 AM MDT	Special Weather Statement	CYS	Niobrara	40 min
Jun 25, 7:42 AM MDT	Severe Thunderstorm Warning	CYS	Converse	33 min
Jun 25, 8:08 AM MDT	Severe Thunderstorm Warning	CYS	Converse	52 min
Jun 25, 8:46 AM MDT	Severe Thunderstorm Warning	CYS	Converse	44 min
Jun 25, 9:23 AM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara	37 min
Jun 25, 9:58 AM MDT	Severe Thunderstorm Warning	CYS	Goshen, Niobrara, Platte	47 min
Jun 25, 10:36 AM MDT	Tornado Warning	CYS	Goshen, Niobrara	24 min
Jun 25, 2:02 PM MDT	Special Weather Statement	CYS	Laramie	28 min
Jun 25, 2:31 PM MDT	Special Weather Statement	CYS	Laramie	29 min
Jun 25, 2:33 PM MDT	Special Weather Statement	CYS	Laramie	27 min
Jun 25, 2:57 PM MDT	Special Weather Statement	CYS	Laramie	33 min
Jun 25, 3:01 PM MDT	Special Weather Statement	CYS	Niobrara	44 min
Jun 25, 3:29 PM MDT	Special Weather Statement	CYS	Platte	46 min
Jun 25, 4:07 PM MDT	Severe Thunderstorm Warning	CYS	Platte	38 min
Jun 25, 4:23 PM MDT	Special Weather Statement	CYS	Goshen	52 min
Jun 25, 4:46 PM MDT	Special Weather Statement	CYS	Platte	44 min
Jun 25, 4:51 PM MDT	Severe Thunderstorm Warning	CYS	Goshen, Laramie	24 min
Jun 25, 10:33 AM MDT	Severe Thunderstorm Warning	CYS	Dawes	42 min
Jun 25, 11:18 AM MDT	Areal Flood Advisory	CYS	Dawes, Sioux	117 min
Jun 25, 11:58 AM MDT	Special Weather Statement	CYS	Dawes	47 min
Jun 25, 12:00 PM MDT	Special Weather Statement	CYS	Dawes	45 min
Jun 25, 1:00 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	30 min
Jun 25, 3:34 PM MDT	Special Weather Statement	CYS	Banner	26 min
Jun 25, 4:06 PM MDT	Special Weather Statement	CYS	Dawes	39 min
Jun 25, 4:09 PM MDT	Special Weather Statement	CYS	Banner	51 min
Jun 25, 4:35 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Sioux	40 min
Jun 25, 4:37 PM MDT	Flash Flood Warning	CYS	Dawes	3 hr
Jun 25, 4:58 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill, Scotts Bluff	47 min
Jun 25, 5:05 PM MDT	Tornado Warning	CYS	Morrill, Scotts Bluff	40 min
Jun 25, 5:13 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Dawes, Morrill	49 min
Jun 25, 5:44 PM MDT	Tornado Warning	CYS	Morrill	22 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2015 Every severe thunderstorm warning in 2015

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.