Alert archive / Nebraska / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 87, NWS Omaha, NE

June 21, 2019Jefferson County, Saline County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 21, 2019, 6:16 AM CDT for Jefferson County, Saline County, Nebraska. It was in force for 29 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 21, 2019, 6:16 AM CDT (11:16 UTC)
Expired
Jun 21, 2019, 6:45 AM CDT
In force
29 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Jefferson County, NE, Saline County, NE

The radar

The Grand Island radar (KUEX), 110 km from the middle of the area, began a volume at 11:20 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 20, 9:44 PM CDTSevere Thunderstorm WatchSPC9 hr
Jun 21, 2:39 AM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 11.3 hours before the alert went out and 126 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, Omaha, NE at 00:00Z on 2019-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1440 joules per kilogram.LCLLFCEL10008507005003002001001 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, Omaha, NE at 00:00Z on 2019-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 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
1440 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1547 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
291 m²/s²
Significant tornado parameter
0.8
Supercell composite
13.1

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 21, 4:51 AM CDT, 1 hour 25 minutes earlier.

Area forecast discussion, Jun 21, 4:51 AM CDT, 1 hour 25 minutes before
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Hazardous weather outlook, Jun 21, 5:40 AM CDT, 36 minutes before
Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
540 AM CDT Fri Jun 21 2019

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-220045-
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-
540 AM CDT Fri Jun 21 2019

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

.DAY ONE...Today and Tonight

Isolated severe storms could still occur this morning for
southeast Nebraska and southwest Iowa, south of a line from David
City in Nebraska to Atlantic in Iowa. Wind gusts up to 60 mph and
hail up to quarter size will be possible. A severe thunderstorm
watch remains in effect until 10 am for these areas.

Otherwise, there is still a slight risk of severe storms this
evening in southeast Nebraska and southwest Iowa, and also in
northeast Nebraska. The severe threat seems lower along the
Interstate 80 corridor.

Flooding will continue along the Missouri River from Plattsmouth
downstream past Rulo through the coming week, and along the
Missouri River above Lewis and Clark Lake.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

A slight risk of severe storms will continue across southeast
Nebraska and southwest Iowa Saturday evening. Otherwise,
additional thunderstorms will be possible Saturday night with
locally heavy rain possible. Isolated thunderstorms could linger
into Sunday.

Flooding will continue along the Missouri River from Plattsmouth
downstream past Rulo through the coming week, and along the
Missouri River above Lewis and Clark Lake.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report any severe weather to the
National Weather Service.

In the hours before

Local storm report, Jun 21, 3:47 AM CDT, 2 hours 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
347 AM CDT FRI JUN 21 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0330 AM     HAIL             WHITING                 42.13N 96.15W
06/21/2019  E1.00 INCH       MONONA             IA   PUBLIC

&&
Special weather statement, Jun 21, 4:07 AM CDT, 2 hours 9 minutes before
Special Weather Statement
National Weather Service Omaha/Valley Nebraska
407 AM CDT Fri Jun 21 2019

IAZ079-090-NEZ067-068-210930-
Mills IA-Fremont IA-Cass NE-Otoe NE-
407 AM CDT Fri Jun 21 2019

...SIGNIFICANT WEATHER ADVISORY FOR FREMONT...MILLS...EASTERN OTOE
AND SOUTHEASTERN CASS COUNTIES UNTIL 430 AM CDT...

At 406 AM CDT, Doppler radar was tracking a strong thunderstorm near
Murray, or 27 miles south of Omaha, moving northeast at 50 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Nebraska City, Plattsmouth, Glenwood, Hamburg, Malvern, Sidney,
Weeping Water, Farragut, Pacific Junction, Murray, Riverton, Avoca,
Talmage, Union, Nehawka, Lorton, Tabor, Thurman, Dunbar and Randolph.

This includes Interstate 29 between mile markers 1 and 32.

A Severe Thunderstorm Watch remains in effect until 1000 AM CDT for
southwestern Iowa...and southeastern Nebraska.

LAT...LON 4059 9576 4058 9578 4056 9576 4054 9577
      4052 9596 4052 9604 4094 9616 4112 9553
      4061 9537 4058 9537
TIME...MOT...LOC 0906Z 240DEG 42KT 4088 9589

HB
Special weather statement, Jun 21, 5:01 AM CDT, 1 hour 15 minutes before
Special Weather Statement
National Weather Service Omaha/Valley Nebraska
501 AM CDT Fri Jun 21 2019

IAZ079-080-090-091-211030-
Mills IA-Page IA-Fremont IA-Montgomery IA-
501 AM CDT Fri Jun 21 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN FREMONT...
MONTGOMERY...EASTERN MILLS AND PAGE COUNTIES UNTIL 530 AM CDT...

At 500 AM CDT, Doppler radar was tracking a strong thunderstorm 5
miles southeast of Essex, or 26 miles north of Tarkio, moving
northeast at 35 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Red Oak, Clarinda, Shenandoah, Villisca, Essex, Stanton, Emerson,
Elliott, Coin, College Springs, Shambaugh, Henderson, Braddyville,
Grant, Yorktown, Imogene, Northboro, Coburg, Blanchard and Hepburn.

A Severe Thunderstorm Watch remains in effect until 1000 AM CDT for
southwestern Iowa.

LAT...LON 4058 9538 4116 9550 4116 9493 4073 9493
      4073 9491 4057 9492
TIME...MOT...LOC 1000Z 233DEG 30KT 4080 9521

HB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 2:00 AM CDTSevere Thunderstorm WarningOAXGage, Jefferson, Lancaster, Saline, Seward45 min
Jun 21, 2:25 AM CDTSevere Thunderstorm WarningOAXButler, Colfax, Platte, Saunders, Seward50 min
Jun 21, 2:37 AM CDTSevere Thunderstorm WarningOAXLancaster, Otoe, Saline, Saunders, Seward38 min
Jun 21, 2:40 AM CDTSevere Thunderstorm WarningOAXGage, Jefferson, Johnson, Lancaster, Otoe, Pawnee and 1 more50 min
Jun 21, 3:13 AM CDTSevere Thunderstorm WarningOAXCass, Lancaster, Otoe, Saline, Saunders, Seward22 min
Jun 21, 4:07 AM CDTSpecial Weather StatementOAXCass23 min
Jun 21, 6:43 AM CDTSevere Thunderstorm WarningOAXGage, Jefferson, Saline32 min
Jun 21, 6:57 AM CDTSevere Thunderstorm WarningOAXGage, Jefferson, Johnson, Lancaster, Otoe, Pawnee and 1 more33 min
Jun 21, 7:17 AM CDTSevere Thunderstorm WarningOAXCass, Otoe28 min
Jun 21, 7:20 AM CDTSevere Thunderstorm WarningOAXGage, Johnson, Nemaha, Otoe, Pawnee, Richardson25 min
Jun 21, 7:41 AM CDTSevere Thunderstorm WarningOAXJohnson, Nemaha, Otoe, Pawnee, Richardson34 min
Jun 21, 7:42 AM CDTSevere Thunderstorm WarningOAXOtoe33 min
Jun 21, 7:56 AM CDTAreal Flood AdvisoryOAXJohnson, Nemaha, Pawnee, Richardson2 hr
Jun 21, 8:10 AM CDTSevere Thunderstorm WarningOAXNemaha, Richardson23 min
Jun 20, 7:23 PM CDTSevere Thunderstorm WarningOAXMonona37 min
Jun 20, 7:51 PM CDTSevere Thunderstorm WarningOAXHarrison, Monona39 min
Jun 21, 5:01 AM CDTSpecial Weather StatementOAXMontgomery, Page29 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.