Alert archive / Nebraska / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 247, NWS Omaha, NE

September 16, 2017Cuming County, Stanton County, Wayne County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Sep 16, 2017, 1:08 AM CDT for Cuming County, Stanton County, Wayne County, Nebraska. It was in force for 16 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: Sep 16, 2017, 1:08 AM CDT (06:08 UTC)
Expired: Sep 16, 2017, 1:24 AM CDT
In force: 16 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cuming County, NE, Stanton County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 95 km from the middle of the area, began a volume at 06:11 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, 6.1 hours before the alert went out and 313 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: 136 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 2158 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 85 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 Sep 15, 11:56 PM CDT, 1 hour 12 minutes earlier.

Area forecast discussion, Sep 15, 11:56 PM CDT, 1 hour 12 minutes before

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Hazardous weather outlook, Sep 15, 3:44 PM CDT, 9 hours 24 minutes before

Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
344 PM CDT Fri Sep 15 2017

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-161045-
Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont-
Page-Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison-
Stanton-Cuming-Burt-Platte-Colfax-Dodge-Washington-Butler-
Saunders-Douglas-Sarpy-Seward-Lancaster-Cass-Otoe-Saline-
Jefferson-Gage-Johnson-Nemaha-Pawnee-Richardson-
344 PM CDT Fri Sep 15 2017

This Hazardous Weather Outlook is for portions of southwest
Iowa...west central Iowa...east central Nebraska...northeast
Nebraska and southeast Nebraska.

.DAY ONE...Tonight and Saturday

Isolated strong storms are possible mainly this evening across
portions of northeast Nebraska west of a Wayne to Columbus line.
Gusty winds and small hail will be the primary hazards.

Scattered, non-severe thunderstorms are possible across much of
northeast Nebraska overnight into early Saturday with more
isolated development possible across the remainder of the area.

Additional thunderstorms are expected to develop along and
immediately behind a cold front moving through the area on
Saturday afternoon. The greatest threat for a few strong to severe
storms will exist generally along and south of I-80 after 3 PM.
Hail and damaging wind gusts will be the primary hazards.

.DAYS TWO THROUGH SEVEN...Saturday night through Friday

Isolated strong storms remain possible into Saturday night, mainly
over southeast Nebraska and southwest Iowa.

There is a good chance for thunderstorms Sunday night into early
Monday, with potential for a few strong storms and locally heavy
rainfall.

There are a few additional chances for storms through the week.
Currently the best chance appears to be late Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is unlikely tonight and Saturday.

In the hours before

Local storm report, Sep 15, 9:09 PM CDT, 3 hours 59 minutes before

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Special weather statement, Sep 15, 9:15 PM CDT, 3 hours 53 minutes before

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Special weather statement, Sep 15, 9:53 PM CDT, 3 hours 15 minutes before

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Special weather statement, Sep 15, 11:04 PM CDT, 2 hours 4 minutes before

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Special weather statement, Sep 16, 12:20 AM CDT, 48 minutes before

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Special weather statement, Sep 16, 12:46 AM CDT, 22 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
Sep 15, 8:28 PM CDT	Special Weather Statement	OAX	Boone	47 min
Sep 15, 8:46 PM CDT	Severe Thunderstorm Warning	OAX	Boone	29 min
Sep 15, 9:15 PM CDT	Special Weather Statement	OAX	Boone	45 min
Sep 15, 9:53 PM CDT	Special Weather Statement	OAX	Madison	37 min
Sep 15, 11:04 PM CDT	Special Weather Statement	OAX	Knox	26 min
Sep 16, 12:20 AM CDT	Special Weather Statement	OAX	Madison, Stanton	25 min
Sep 16, 12:46 AM CDT	Special Weather Statement	OAX	Stanton	44 min
Sep 16, 1:32 AM CDT	Special Weather Statement	OAX	Colfax	28 min
Sep 16, 2:58 AM CDT	Special Weather Statement	OAX	Shelby	32 min
Sep 16, 3:41 AM CDT	Special Weather Statement	OAX	Shelby	34 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2017 Every severe thunderstorm warning in 2017

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.