Alert archive / Nebraska / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 175, NWS Cheyenne, WY

July 23, 20134 counties in Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 23, 2013, 9:14 PM MDT for 4 counties in Nebraska. It was in force for 61 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 23, 2013, 9:14 PM MDT (03:14 UTC)
Expired
Jul 23, 2013, 10:15 PM MDT
In force
61 min
Issued by
NWS Cheyenne, WY
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Banner County, NE, Cheyenne County, NE, Kimball County, NE, Morrill County, NE

The radar

The Cheyenne radar (KCYS), 125 km from the middle of the area, began a volume at 03:16 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.2 hours before the alert went out and 233 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2013-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 289 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2013-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
289 J/kg
Mixed-layer CIN
-170 J/kg
Mixed-layer LCL
1992 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

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 Jul 23, 6:08 PM MDT, 3 hours 6 minutes earlier.

Area forecast discussion, Jul 23, 6:08 PM MDT, 3 hours 6 minutes before
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Hazardous weather outlook, Jul 23, 12:11 PM MDT, 9 hours 3 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
1211 PM MDT TUE JUL 23 2013

WYZ101>119-241815-
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-
1211 PM MDT TUE JUL 23 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A FEW WEAK THUNDERSTORMS ARE POSSIBLE LATE TONIGHT OVER CARBON
COUNTY.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

WIDELY SCATTERED AFTERNOON AND NIGHTTIME THUNDERSTORMS WILL BE
POSSIBLE MOST DAYS DURING THIS PERIOD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED THIS AFTERNOON AND TONIGHT.

&&

THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND
CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT...
HTTP://WEATHER.GOV/CHEYENNE

NEZ002-003-019>021-054-055-095-096-241815-
DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE-
NORTH SIOUX-SOUTH SIOUX-
1211 PM MDT TUE JUL 23 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA
PANHANDLE.

.DAY ONE...THIS AFTERNOON AND TONIGHT

ISOLATED THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING
ESPECIALLY BETWEEN CHADRON AND SIDNEY. A COUPLE OF THE STORMS COULD
BECOME STRONG CONTAINING HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

WIDELY SCATTERED AFTERNOON AND NIGHTTIME THUNDERSTORMS WILL BE
POSSIBLE MOST DAYS DURING THIS PERIOD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED BETWEEN CHADRON AND SIDNEY LATE
TODAY.

&&

THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND
CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT...
HTTP://WEATHER.GOV/CHEYENNE

In the hours before

Special weather statement, Jul 23, 5:40 PM MDT, 3 hours 34 minutes before
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Local storm report, Jul 23, 6:12 PM MDT, 3 hours 2 minutes before
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Special weather statement, Jul 23, 8:01 PM MDT, 1 hour 13 minutes before
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Special weather statement, Jul 23, 8:19 PM MDT, 55 minutes before
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Special weather statement, Jul 23, 8:33 PM MDT, 41 minutes before
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Special weather statement, Jul 23, 9:00 PM MDT, 14 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 8:01 PM MDTSpecial Weather StatementCYSLaramie44 min
Jul 24, 12:20 PM MDTSpecial Weather StatementCYSGoshen40 min
Jul 24, 12:34 PM MDTSevere Thunderstorm WarningCYSGoshen41 min
Jul 24, 1:09 PM MDTSevere Thunderstorm WarningCYSGoshen51 min
Jul 24, 1:33 PM MDTSevere Thunderstorm WarningCYSConverse, Niobrara, Platte42 min
Jul 24, 1:35 PM MDTAreal Flood AdvisoryCYSGoshen3 hr
Jul 24, 2:20 PM MDTSpecial Weather StatementCYSPlatte55 min
Jul 24, 2:30 PM MDTSpecial Weather StatementCYSNiobrara60 min
Jul 24, 2:36 PM MDTSpecial Weather StatementCYS54 min
Jul 24, 3:00 PM MDTSpecial Weather StatementCYSPlatte60 min
Jul 24, 3:06 PM MDTSpecial Weather StatementCYSGoshen54 min
Jul 24, 3:08 PM MDTSpecial Weather StatementCYSConverse67 min
Jul 24, 3:19 PM MDTSpecial Weather StatementCYSPlatte56 min
Jul 24, 3:24 PM MDTSevere Thunderstorm WarningCYSLaramie, Platte66 min
Jul 24, 3:28 PM MDTSpecial Weather StatementCYS62 min
Jul 24, 4:05 PM MDTSpecial Weather StatementCYSAlbany55 min
Jul 24, 4:10 PM MDTSpecial Weather StatementCYS65 min
Jul 24, 4:20 PM MDTAreal Flood AdvisoryCYSLaramie, Platte3 hr
Jul 24, 4:33 PM MDTSpecial Weather StatementCYSLaramie57 min
Jul 24, 4:37 PM MDTSevere Thunderstorm WarningCYSLaramie, Platte53 min
Jul 24, 4:57 PM MDTSevere Thunderstorm WarningCYSAlbany48 min
Jul 24, 5:05 PM MDTSpecial Weather StatementCYSLaramie55 min
Jul 24, 5:13 PM MDTSpecial Weather StatementCYSGoshen62 min
Jul 24, 5:19 PM MDTFlash Flood WarningCYSLaramie, Platte3 hr
Jul 24, 5:24 PM MDTSevere Thunderstorm WarningCYSLaramie66 min
Jul 24, 5:37 PM MDTFlash Flood WarningCYSAlbany6 hr
Jul 24, 5:58 PM MDTSpecial Weather StatementCYSLaramie62 min
Jul 23, 8:19 PM MDTSpecial Weather StatementCYSCheyenne56 min
Jul 23, 8:33 PM MDTSpecial Weather StatementCYSKimball57 min
Jul 23, 9:00 PM MDTSpecial Weather StatementCYSKimball60 min
Jul 23, 9:48 PM MDTSpecial Weather StatementCYSCheyenne57 min
Jul 23, 10:06 PM MDTSevere Thunderstorm WarningCYSCheyenne54 min
Jul 24, 1:20 PM MDTSpecial Weather StatementCYSBox Butte40 min
Jul 24, 1:36 PM MDTSevere Thunderstorm WarningCYSBox Butte39 min
Jul 24, 2:16 PM MDTSevere Thunderstorm WarningCYSBox Butte, Morrill44 min
Jul 24, 2:23 PM MDTSevere Thunderstorm WarningCYSSioux52 min
Jul 24, 2:31 PM MDTSpecial Weather StatementCYSBanner59 min
Jul 24, 3:01 PM MDTSevere Thunderstorm WarningCYSMorrill44 min
Jul 24, 3:18 PM MDTSpecial Weather StatementCYSDawes42 min
Jul 24, 3:44 PM MDTSevere Thunderstorm WarningCYSMorrill46 min
Jul 24, 5:37 PM MDTSpecial Weather StatementCYSCheyenne68 min
Jul 24, 5:39 PM MDTSpecial Weather StatementCYSCheyenne66 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.