Alert archive / Nebraska / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 162, NWS Omaha, NE

July 25, 20135 counties in Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jul 25, 2013, 4:20 PM CDT for 5 counties in Nebraska. It was in force for 55 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 25, 2013, 4:20 PM CDT (21:20 UTC)
Expired: Jul 25, 2013, 5:15 PM CDT
In force: 55 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Antelope County, NE, Cedar County, NE, Knox County, NE, Pierce County, NE, Wayne County, NE

The radar

The Sioux Falls radar (KFSD), 152 km from the middle of the area, began a volume at 21:22 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

Omaha, NE (KOAX), launched 12:00Z, 9.3 hours before the alert went out and 155 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: 304 J/kg
Mixed-layer CIN: -131 J/kg
Mixed-layer LCL: 1305 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 166 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Jul 25, 3:10 PM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, Jul 25, 3:10 PM CDT, 1 hour 10 minutes before

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Hazardous weather outlook, Jul 25, 4:15 PM CDT, 5 minutes before

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In the hours before

Special weather statement, Jul 25, 12:21 PM CDT, 3 hours 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1221 PM CDT THU JUL 25 2013

NEZ012-251745-
CEDAR NE-
1221 PM CDT THU JUL 25 2013

...SIGNIFICANT WEATHER ADVISORY FOR CEDAR COUNTY UNTIL 1245 PM CDT...

AT 1217 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM NEAR HARTINGTON...OR 21 MILES SOUTH OF
YANKTON...MOVING EAST AT 35 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 45 MPH WILL BE
POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
HARTINGTON...COLERIDGE AND OBERT.

LAT...LON 4269 9701 4242 9702 4251 9739 4276 9734
TIME...MOT...LOC 1717Z 284DEG 29KT 4260 9727

MILLER

Local storm report, Jul 25, 3:20 PM CDT, 1 hour before

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Local storm report, Jul 25, 3:24 PM CDT, 56 minutes before

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Special weather statement, Jul 25, 3:59 PM CDT, 21 minutes before

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Special weather statement, Jul 25, 4:15 PM CDT, 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 12:21 PM CDT	Special Weather Statement	OAX	Cedar	24 min
Jul 25, 12:46 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Thurston	29 min
Jul 25, 3:59 PM CDT	Special Weather Statement	OAX	Knox	46 min
Jul 25, 4:15 PM CDT	Special Weather Statement	OAX	Boone	45 min
Jul 25, 4:50 PM CDT	Special Weather Statement	OAX	Cedar	55 min
Jul 25, 4:58 PM CDT	Special Weather Statement	OAX	Madison	47 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2013 Every 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.