Alert archive / Nebraska / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 115, NWS Omaha, NE

June 24, 2015Cass County, Sarpy County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 24, 2015, 5:23 AM CDT for Cass County, Sarpy County, Nebraska. It was in force for 21 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: Jun 24, 2015, 5:23 AM CDT (10:23 UTC)
Expired: Jun 24, 2015, 5:44 AM CDT
In force: 21 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cass County, NE, Sarpy County, NE

The radar

The Omaha radar (KOAX), 40 km from the middle of the area, began a volume at 10:24 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 00:00Z, 10.4 hours before the alert went out and 40 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1607 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -115 m²/s²
0-3 km storm-relative helicity: 232 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

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 Jun 23, 6:16 PM CDT, 11 hours 7 minutes earlier.

Area forecast discussion, Jun 23, 6:16 PM CDT, 11 hours 7 minutes before

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Hazardous weather outlook, Jun 23, 5:11 PM CDT, 12 hours 12 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
Jun 24, 1:25 AM CDT	Special Weather Statement	OAX	Nance	35 min
Jun 24, 2:13 AM CDT	Special Weather Statement	OAX	Colfax	32 min
Jun 24, 2:31 AM CDT	Special Weather Statement	OAX	Butler	29 min
Jun 24, 3:26 AM CDT	Special Weather Statement	OAX	Saunders	34 min
Jun 24, 4:01 AM CDT	Special Weather Statement	OAX	Saunders	29 min
Jun 24, 5:04 AM CDT	Special Weather Statement	OAX	Sarpy	26 min
Jun 24, 5:16 AM CDT	Areal Flood Advisory	OAX	Butler, Saunders	4 hr
Jun 24, 5:41 AM CDT	Special Weather Statement	OAX	Saunders	34 min
Jun 24, 5:59 AM CDT	Areal Flood Advisory	OAX	Cass, Douglas, Sarpy, Saunders	4 hr
Jun 24, 6:15 AM CDT	Special Weather Statement	OAX	Sarpy	30 min
Jun 24, 6:16 AM CDT	Special Weather Statement	OAX	Sarpy	29 min
Jun 24, 6:49 AM CDT	Special Weather Statement	OAX	Sarpy	26 min
Jun 24, 10:13 AM CDT	Special Weather Statement	OAX	Madison	47 min
Jun 24, 11:15 AM CDT	Areal Flood Advisory	OAX	Wayne	2 hr
Jun 24, 11:20 AM CDT	Special Weather Statement	OAX	Thurston	55 min
Jun 24, 12:48 AM CDT	Special Weather Statement	OAX	Monona	27 min
Jun 24, 2:44 AM CDT	Special Weather Statement	OAX	Monona	16 min
Jun 24, 6:19 AM CDT	Special Weather Statement	OAX	Page	41 min
Jun 24, 6:21 AM CDT	Special Weather Statement	OAX	Harrison	24 min
Jun 24, 7:31 AM CDT	Special Weather Statement	OAX	Fremont, Mills, Montgomery, Page	29 min
Jun 24, 6:27 PM CDT	Severe Thunderstorm Warning	OAX	Shelby	63 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2015 Every severe thunderstorm warning in 2015

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.