Alert archive / Nebraska / Special Weather Statements in 2019

Special Weather Statement, NWS Omaha, NE

August 7, 2019Seward County, Nebraska

NWS Omaha, NE issued this special weather statement at Aug 7, 2019, 2:47 AM CDT for Seward County, Nebraska. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 7, 2019, 2:47 AM CDT (07:47 UTC)
Expired
Aug 7, 2019, 3:15 AM CDT
In force
28 min
Issued by
NWS Omaha, NE

County Seward County, NE

The radar

The Omaha radar (KOAX), 91 km from the middle of the area, began a volume at 07:49 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, 7.8 hours before the alert went out and 298 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 2019-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3098 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 2019-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.1939587897Sfc1 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
3098 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1486 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
145 m²/s²
Significant tornado parameter
0.4
Supercell composite
5.5

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 1:27 AM CDTSpecial Weather StatementOAXBoone, Butler, Colfax, Madison, Platte, Stanton33 min
Aug 7, 1:55 AM CDTSpecial Weather StatementOAXSeward50 min
Aug 7, 2:20 AM CDTSpecial Weather StatementOAXSaline, Seward25 min
Aug 7, 3:05 AM CDTSpecial Weather StatementOAXLancaster25 min
Aug 7, 3:08 AM CDTSpecial Weather StatementOAXJohnson52 min
Aug 7, 3:27 AM CDTSpecial Weather StatementOAXGage, Jefferson, Saline48 min
Aug 7, 3:49 AM CDTSpecial Weather StatementOAXCass, Nemaha, Otoe, Richardson56 min
Aug 7, 3:50 AM CDTSpecial Weather StatementOAXDouglas, Sarpy, Washington55 min
Aug 7, 4:02 AM CDTSpecial Weather StatementOAXJohnson, Pawnee58 min
Aug 7, 4:16 AM CDTSpecial Weather StatementOAXGage, Jefferson, Saline59 min

Nearby

Special Weather Statements in Nebraska, 2019Every special weather statement in 2019

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.