Alert archive / Nebraska / Special Weather Statements in 2016

Special Weather Statement, NWS Omaha, NE

August 19, 2016Cass County, Nebraska

NWS Omaha, NE issued this special weather statement at Aug 19, 2016, 2:25 PM CDT for Cass County, Nebraska. It was in force for 35 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 19, 2016, 2:25 PM CDT (19:25 UTC)
Expired: Aug 19, 2016, 3:00 PM CDT
In force: 35 min
Issued by: NWS Omaha, NE

County Cass County, NE

The radar

The Omaha radar (KOAX), 60 km from the middle of the area, began a volume at 19:29 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, 7.4 hours before the alert went out and 60 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: 865 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 1314 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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.

Issued	Product	Office	Counties	Lasted
Aug 19, 2:15 PM CDT	Special Weather Statement	OAX	Lancaster	30 min
Aug 19, 2:51 PM CDT	Special Weather Statement	OAX	Jefferson	24 min
Aug 19, 3:16 PM CDT	Special Weather Statement	OAX	Gage, Jefferson	29 min
Aug 19, 3:57 PM CDT	Areal Flood Advisory	OAX	Sarpy	3 hr
Aug 19, 4:17 PM CDT	Special Weather Statement	OAX	Gage, Jefferson, Johnson, Nemaha, Pawnee	43 min
Aug 19, 5:15 PM CDT	Areal Flood Advisory	OAX	Johnson	60 min

Nearby

Special Weather Statements in Nebraska, 2016 Every special weather statement in 2016

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.