Alert archive / Nebraska / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 251, NWS Omaha, NE

August 10, 2007Thurston County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Aug 10, 2007, 2:59 PM CDT for Thurston County, Nebraska. It was in force for 46 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
Aug 10, 2007, 2:59 PM CDT (19:59 UTC)
Expired
Aug 10, 2007, 3:45 PM CDT
In force
46 min
Issued by
NWS Omaha, NE
Area
Counties, with a storm outline in the text

County Thurston County, NE

The radar

The Omaha radar (KOAX), 94 km from the middle of the area, began a volume at 19:59 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 10, 12:28 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 8.0 hours before the alert went out and 94 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, Omaha, NE at 12:00Z on 2007-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 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, Omaha, NE at 12:00Z on 2007-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 square meters per square second.193958Sfc1 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
7 J/kg
Mixed-layer CIN
-572 J/kg
Mixed-layer LCL
2963 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 10, 2:54 PM CDT, 5 minutes earlier.

Area forecast discussion, Aug 10, 2:54 PM CDT, 5 minutes before
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Hazardous weather outlook, Aug 10, 11:47 AM CDT, 3 hours 12 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1147 AM CDT FRI AUG 10 2007

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-102300-
ANTELOPE-BOONE-BURT-BUTLER-CASS-CEDAR-COLFAX-CUMING-DODGE-DOUGLAS-
FREMONT IA-GAGE-HARRISON IA-JEFFERSON-JOHNSON-KNOX-LANCASTER-MADISON-
MILLS IA-MONONA IA-MONTGOMERY IA-NEMAHA-OTOE-PAGE IA-PAWNEE-PIERCE-
PLATTE-POTTAWATTAMIE IA-RICHARDSON-SALINE-SARPY-SAUNDERS-SEWARD-
SHELBY IA-STANTON-THURSTON-WASHINGTON-WAYNE-
1147 AM CDT FRI AUG 10 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN NEBRASKA AND SOUTHWEST
IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORMS WILL PUSH ACROSS PORTIONS OF NORTHEAST NEBRASKA THIS
AFTERNOON. THE ACTIVITY SHOULD GENERALLY BE NORTH OF A LINE FROM
ABOUT NELIGH TO WAYNE. SOME STORMS MAY BECOME SEVERE AND BE
ACCOMPANIED BY LARGE HAIL AND DAMAGING WIND GUST.

HOT AND HUMID WEATHER WILL CONTINUE TODAY WITH HIGH TEMPERATURES
REACHING THE MID TO UPPER 90S AND HEAT INDEX VALUES RANGING FROM 100
TO 108 THIS AFTERNOON. THUS...A HEAT ADVISORY WILL BE IN EFFECT
THROUGH SUNDAY FOR AREAS ALONG AND SOUTH OF A LINE FROM DAVID CITY
NEBRASKA TO OAKLAND IOWA.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

HOT AND HUMID WEATHER WILL PREVAIL ACROSS THE AREA THROUGH EARLY NEXT
WEEK. DURING THIS TIME...THE AFTERNOON HEAT INDEX MAY EXCEED 105 ON
SEVERAL DAYS.

THERE WILL ALSO BE A CHANCE OF THUNDERSTORMS...SOME OF WHICH MAY BE
SEVERE...SUNDAY AFTERNOON AND NIGHT ACROSS PORTIONS OF NORTHEAST
NEBRASKA AND WEST CENTRAL IOWA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION SHOULD NOT BE NEEDED THIS AFTERNOON OR TONIGHT.

DEE

In the hours before

Local storm report, Aug 10, 12:47 PM CDT, 2 hours 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1247 PM CDT FRI AUG 10 2007

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

1240 PM     HAIL             9 WSW NIOBRARA          42.70N 98.19W
08/10/2007  E0.88 INCH       KNOX               NE   LAW ENFORCEMENT

&&

JRB
Local storm report, Aug 10, 2:31 PM CDT, 28 minutes before
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The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 9, 8:23 PM CDTSevere Thunderstorm WarningOAXAntelope, Knox52 min
Aug 9, 9:15 PM CDTSevere Thunderstorm WarningOAXAntelope, Boone30 min
Aug 9, 9:37 PM CDTSevere Thunderstorm WarningOAXMadison, Pierce23 min
Aug 9, 9:44 PM CDTSevere Thunderstorm WarningOAXAntelope, Boone31 min
Aug 9, 9:51 PM CDTSevere Thunderstorm WarningOAXCedar, Knox39 min
Aug 9, 10:00 PM CDTSevere Thunderstorm WarningOAXMadison, Pierce30 min
Aug 9, 10:08 PM CDTSevere Thunderstorm WarningOAXPlatte52 min
Aug 9, 10:29 PM CDTSevere Thunderstorm WarningOAXMadison, Stanton46 min
Aug 9, 10:37 PM CDTSevere Thunderstorm WarningOAXWayne23 min
Aug 9, 10:48 PM CDTSevere Thunderstorm WarningOAXCuming, Thurston42 min
Aug 9, 10:52 PM CDTSevere Thunderstorm WarningOAXColfax, Platte38 min
Aug 9, 11:22 PM CDTSevere Thunderstorm WarningOAXButler, Dodge, Saunders38 min
Aug 9, 11:31 PM CDTSevere Thunderstorm WarningOAXBurt44 min
Aug 10, 1:16 AM CDTSevere Thunderstorm WarningOAXAntelope44 min
Aug 10, 1:53 AM CDTSevere Thunderstorm WarningOAXAntelope37 min
Aug 10, 2:02 AM CDTSevere Thunderstorm WarningOAXOtoe25 min
Aug 10, 2:28 AM CDTSevere Thunderstorm WarningOAXAntelope32 min
Aug 10, 4:16 AM CDTHeat AdvisoryOAXButler, Cass, Douglas, Gage, Jefferson, Johnson and 9 more63 hr
Aug 10, 12:22 PM CDTSevere Thunderstorm WarningOAXKnox38 min
Aug 10, 12:50 PM CDTSevere Thunderstorm WarningOAXKnox55 min
Aug 10, 12:57 PM CDTTornado WarningOAXKnox33 min
Aug 10, 1:17 PM CDTTornado WarningOAXPierce58 min
Aug 10, 2:05 PM CDTSevere Thunderstorm WarningOAXWayne55 min
Aug 9, 11:24 PM CDTSevere Thunderstorm WarningOAXMonona51 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2007Every severe thunderstorm warning in 2007

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.