Alert archive / Nebraska / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 29, NWS Omaha, NE

May 6, 2019Jefferson County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at May 6, 2019, 2:25 PM CDT for Jefferson County, Nebraska. It was in force for 20 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
May 6, 2019, 2:25 PM CDT (19:25 UTC)
Expired
May 6, 2019, 2:45 PM CDT
In force
20 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Jefferson County, NE

The radar

The Grand Island radar (KUEX), 111 km from the middle of the area, began a volume at 19:24 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

Topeka, KS (KFOE), launched 12:00Z, 7.4 hours before the alert went out and 184 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, Topeka, KS at 12:00Z on 2019-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Topeka, KS at 12:00Z on 2019-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1527 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
72 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

Hazardous weather outlook, May 5, 5:07 PM CDT, 21 hours 18 minutes before
Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
507 PM CDT Sun May 5 2019

IAZ043-NEZ011-012-015>018-030>034-042>044-061215-
Monona-Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison-
Stanton-Cuming-Burt-Platte-Colfax-Dodge-
507 PM CDT Sun May 5 2019

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

.DAY ONE...Tonight and Monday

There is a chance of thunderstorms across northeast Nebraska and
northwest Iowa tonight and Monday, but severe storms are not
expected.

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

Several periods of showers and thunderstorms are expected across
the region through the middle of next week. Locally heavy rain
will be possible Tuesday night through Wednesday night.

.SPOTTER INFORMATION STATEMENT...

Widespread spotter activation is not expected at this time.

IAZ080-091-NEZ091>093-061215-
Montgomery-Page-Nemaha-Pawnee-Richardson-
507 PM CDT Sun May 5 2019

This Hazardous Weather Outlook is for portions of southwest Iowa
and southeast Nebraska.

.DAY ONE...Tonight and Monday

Minor flooding will continue on the Missouri River. There will
also be a chance of thunderstorms tonight. Some of the storms
could have small hail and gusty winds.

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

Several periods of showers and thunderstorms are expected across
the region through the middle of next week. Locally heavy rain
will be possible Tuesday night through Wednesday night. \

.SPOTTER INFORMATION STATEMENT...

Widespread spotter activation is not expected at this time.

IAZ055-056-069-079-090-NEZ045-050>053-065>068-078-088>090-061215-
Harrison-Shelby-Pottawattamie-Mills-Fremont-Washington-Butler-
Saunders-Douglas-Sarpy-Seward-Lancaster-Cass-Otoe-Saline-
Jefferson-Gage-Johnson-
507 PM CDT Sun May 5 2019

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

.DAY ONE...Tonight and Monday

A severe thunderstorm watch remains in effect until 10 pm. Storms
could contain hail up to golf ball size, along with damaging
winds, especially in southeast Nebraska.

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

Several periods of showers and thunderstorms are expected across
the region through the middle of next week. Locally heavy rain
will be possible Tuesday night through Wednesday night.

.SPOTTER INFORMATION STATEMENT...

Spotters will be needed, especially in southeast Nebraska where
ongoing severe storms are occurring. Please report severe weather
to your local law enforcement agency or to the National Weather
Service.

DeWald

The office that day

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

IssuedProductOfficeCountiesLasted
May 5, 7:28 PM CDTSpecial Weather StatementOAXPawnee, Richardson32 min
May 6, 1:12 PM CDTSpecial Weather StatementOAXSeward48 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2019Every severe thunderstorm warning 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.