Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 170, NWS Omaha, NE

June 23, 2018Colfax County, Cuming County, Dodge County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 23, 2018, 7:28 PM CDT for Colfax County, Cuming County, Dodge County, Nebraska. It was in force for 47 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 23, 2018, 7:28 PM CDT (00:28 UTC)
Expired: Jun 23, 2018, 8:15 PM CDT
In force: 47 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.5 in
Wind: 50.0 mph

Counties Colfax County, NE, Cuming County, NE, Dodge County, NE

The radar

The Omaha radar (KOAX), 57 km from the middle of the area, began a volume at 00:30 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, 0.5 hours before the alert went out and 319 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: 858 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 2367 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 71 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 Jun 23, 6:48 PM CDT, 40 minutes earlier.

Area forecast discussion, Jun 23, 6:48 PM CDT, 40 minutes before

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Hazardous weather outlook, Jun 23, 4:48 PM CDT, 2 hours 40 minutes before

Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
448 PM CDT Sat Jun 23 2018

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-241200-
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-
448 PM CDT Sat Jun 23 2018

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 Sunday

Isolated thunderstorms will be possible into this evening, the
chance of severe weather is low.

Minor river flooding will continue along the Missouri River from
Brownville downstream to Rulo.

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

Scattered thunderstorms may occur Sunday morning.

Thunderstorm chances will increase across area Sunday afternoon
and linger into Monday. Some severe storms are possible Sunday
afternoon and evening. Some heavy rain is possible in the storms,
particularly across southeast Nebraska.

Additional thunderstorms are possible Monday into Tuesday, and
again later in the week.

Minor river flooding is forecast to continue along the
Missouri River from Brownville to Rulo through the period.
Flooding may develop farther north by mid week, from around
Plattsmouth to Nebraska City.

.SPOTTER INFORMATION STATEMENT...

Storm spotter activation should not be needed tonight, but may be
needed on Sunday afternoon.

In the hours before

Local storm report, Jun 23, 5:56 PM CDT, 1 hour 32 minutes before

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Local storm report, Jun 23, 6:00 PM CDT, 1 hour 28 minutes before

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Local storm report, Jun 23, 6:06 PM CDT, 1 hour 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
Jun 23, 10:10 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Madison, Platte, Stanton	35 min
Jun 24, 1:27 AM CDT	Special Weather Statement	OAX	Lancaster	33 min
Jun 24, 2:56 PM CDT	Special Weather Statement	OAX	Colfax	34 min
Jun 24, 3:04 PM CDT	Severe Thunderstorm Warning	OAX	Colfax	26 min
Jun 24, 4:45 PM CDT	Special Weather Statement	OAX	Madison	30 min
Jun 24, 4:48 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Pierce, Stanton, Wayne	27 min
Jun 24, 6:03 PM CDT	Special Weather Statement	OAX	Sarpy	27 min
Jun 24, 6:56 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Dodge	34 min
Jun 24, 12:34 AM CDT	Special Weather Statement	OAX	Monona	26 min
Jun 24, 4:52 PM CDT	Special Weather Statement	OAX	Page	38 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2018 Every severe thunderstorm warning in 2018

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.