Alert archive / Nebraska / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 124, NWS Hastings, NE

July 13, 2009Dawson County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Jul 13, 2009, 12:15 AM CDT for Dawson County, Nebraska. It was in force for 30 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 13, 2009, 12:15 AM CDT (05:15 UTC)
Expired
Jul 13, 2009, 12:45 AM CDT
In force
30 min
Issued by
NWS Hastings, NE
Area
Storm-based polygon

County Dawson County, NE

The radar

The Grand Island radar (KUEX), 131 km from the middle of the area, began a volume at 05:15 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, 5.3 hours before the alert went out and 72 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 2009-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1078 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 2009-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 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
1078 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
1835 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 11:57 PM CDTSpecial Weather StatementGIDDawson33 min
Jul 13, 12:06 AM CDTSpecial Weather StatementGIDHarlan24 min
Jul 13, 12:25 AM CDTAreal Flood AdvisoryGIDDawson3 hr
Jul 13, 12:36 AM CDTSpecial Weather StatementGIDFranklin, Kearney, Phelps24 min
Jul 13, 12:45 AM CDTSpecial Weather StatementGIDDawson30 min
Jul 13, 12:46 AM CDTSevere Thunderstorm WarningGIDFranklin, Harlan44 min
Jul 13, 1:29 AM CDTSpecial Weather StatementGIDFranklin31 min
Jul 13, 1:43 AM CDTSpecial Weather StatementGIDWebster32 min
Jul 13, 2:16 AM CDTSpecial Weather StatementGIDHall29 min
Jul 13, 2:58 AM CDTSpecial Weather StatementGIDNuckolls32 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2009Every severe thunderstorm warning in 2009

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.