Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 159, NWS Omaha, NE

June 19, 2018Boone County, Platte County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 19, 2018, 6:51 AM CDT for Boone County, Platte County, Nebraska. It was in force for 24 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 19, 2018, 6:51 AM CDT (11:51 UTC)
Expired: Jun 19, 2018, 7:15 AM CDT
In force: 24 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Boone County, NE, Platte County, NE

The radar

The Omaha radar (KOAX), 124 km from the middle of the area, began a volume at 11:55 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, 11.9 hours before the alert went out and 124 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: 992 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 896 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 301 m²/s²
0-3 km storm-relative helicity: 336 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.2

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 19, 6:46 AM CDT, 5 minutes earlier.

Area forecast discussion, Jun 19, 6:46 AM CDT, 5 minutes before

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Hazardous weather outlook, Jun 19, 4:29 AM CDT, 2 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
429 AM CDT Tue Jun 19 2018

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-192330-
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-
429 AM CDT Tue Jun 19 2018

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 to scattered strong to severe thunderstorms are expected
over portions of eastern Nebraska and southwest Iowa this morning
and again this afternoon and tonight. Locally heavy rain, damaging
winds, and lightning will be the primary hazards. An isolated
tornado and some hail cannot be ruled out though due to the very
unstable conditions developing this afternoon.

The storms this morning and this afternoon should mostly be over
southeast Nebraska and southwest iowa with additional storms
developing after 4pm and tonight over a larger area of eastern
nebraska and western Iowa.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Thunderstorm chances will remain in the forecast Wednesday and
Thursday. Periods of heavy rain are possible. Thunderstorm chances
return to part of the area Saturday and Saturday nigh and last
into early next week.

.SPOTTER INFORMATION STATEMENT...

Storm spotter activation may be needed for parts of the area on
in southeast Nebraska and possibly southwest Iowa this afternoon
and tonight.

Zapotocny

In the hours before

Special weather statement, Jun 19, 12:59 AM CDT, 5 hours 52 minutes before

Special Weather Statement
National Weather Service Omaha/Valley Nebraska
1259 AM CDT TUE JUN 19 2018

IAZ069-079-080-090-091-190645-
Pottawattamie IA-Mills IA-Page IA-Fremont IA-Montgomery IA-
1259 AM CDT TUE JUN 19 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN FREMONT...
MONTGOMERY...MILLS...SOUTHEASTERN POTTAWATTAMIE AND NORTHERN PAGE
COUNTIES UNTIL 145 AM CDT...

At 1259 AM CDT, Doppler radar was tracking a strong thunderstorm near
Malvern, or 26 miles southeast of Omaha, moving northeast at 35 mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

Locations impacted include...
Red Oak, Shenandoah, Oakland, Villisca, Malvern, Treynor, Carson,
Essex, Stanton, Farragut, Emerson, Elliott, Riverton, Macedonia,
Silver City, Henderson, Randolph, Hastings, Grant and Imogene.

LAT...LON 4069 9558 4119 9573 4139 9517 4135 9515
      4116 9516 4116 9493 4079 9493
TIME...MOT...LOC 0559Z 237DEG 29KT 4104 9559

KERN

Local storm report, Jun 19, 5:10 AM CDT, 1 hour 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
510 AM CDT TUE JUN 19 2018

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

0445 AM     HEAVY RAIN       3 NNE BOYS TOWN         41.31N 96.11W
06/19/2018  M2.49 INCH       DOUGLAS            NE   TRAINED SPOTTER

            127TH & FORT. - STORM TOTAL THROUGH 445AM.

&&

CZ

Local storm report, Jun 19, 5:13 AM CDT, 1 hour 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
513 AM CDT TUE JUN 19 2018

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

0100 AM     HEAVY RAIN       1 WNW VALLEY            41.32N 96.37W
06/19/2018  M2.88 INCH       DOUGLAS            NE   OFFICIAL NWS OBS

            NWS VALLEY/OMAHA OFFICE.

&&

CZ

Local storm report, Jun 19, 5:38 AM CDT, 1 hour 13 minutes before

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Special weather statement, Jun 19, 6:24 AM CDT, 27 minutes before

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Special weather statement, Jun 19, 6:29 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
Jun 18, 7:13 PM CDT	Severe Thunderstorm Warning	OAX	Thurston	32 min
Jun 18, 7:43 PM CDT	Special Weather Statement	OAX	Knox	32 min
Jun 18, 9:43 PM CDT	Special Weather Statement	OAX	Butler	32 min
Jun 18, 10:11 PM CDT	Special Weather Statement	OAX	Wayne	34 min
Jun 18, 10:20 PM CDT	Special Weather Statement	OAX	Saunders	40 min
Jun 18, 10:37 PM CDT	Special Weather Statement	OAX	Thurston	38 min
Jun 18, 11:59 PM CDT	Special Weather Statement	OAX	Douglas	31 min
Jun 19, 12:29 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Douglas, Sarpy	31 min
Jun 19, 6:24 AM CDT	Special Weather Statement	OAX	Colfax	36 min
Jun 19, 6:29 AM CDT	Special Weather Statement	OAX	Boone	31 min
Jun 19, 7:15 AM CDT	Areal Flood Advisory	OAX	Douglas, Sarpy	3 hr
Jun 19, 8:00 AM CDT	Areal Flood Advisory	OAX	Douglas, Sarpy	3 hr
Jun 19, 8:48 AM CDT	Areal Flood Warning	OAX	Douglas	3 hr
Jun 19, 9:44 AM CDT	River Flood Warning	OAX	Nemaha	43 days
Jun 19, 9:44 AM CDT	River Flood Warning	OAX	Richardson	36 days
Jun 19, 3:16 PM CDT	Flash Flood Watch	OAX	Cass, Dodge, Douglas, Gage, Jefferson, Lancaster and 6 more	16 hr
Jun 19, 3:55 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson, Saline	65 min
Jun 19, 4:51 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saline	54 min
Jun 19, 5:00 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson	30 min
Jun 19, 5:09 PM CDT	Special Weather Statement	OAX	Lancaster	36 min
Jun 19, 5:28 PM CDT	Special Weather Statement	OAX	Jefferson	47 min
Jun 19, 5:34 PM CDT	Areal Flood Advisory	OAX	Jefferson	3 hr
Jun 19, 5:42 PM CDT	Special Weather Statement	OAX	Lancaster	33 min
Jun 19, 6:07 PM CDT	Flash Flood Warning	OAX	Jefferson	3 hr
Jun 19, 6:13 PM CDT	Flash Flood Warning	OAX	Gage, Lancaster, Saline	3 hr
Jun 18, 7:29 PM CDT	Special Weather Statement	OAX	Shelby	31 min
Jun 18, 11:50 PM CDT	Areal Flood Advisory	OAX	Mills, Pottawattamie	3 hr
Jun 19, 12:48 AM CDT	Special Weather Statement	OAX	Mills	27 min
Jun 19, 12:59 AM CDT	Special Weather Statement	OAX	Mills, Montgomery	46 min
Jun 19, 1:23 AM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Page	41 min
Jun 19, 6:06 PM CDT	Special Weather Statement	OAX	Shelby	39 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.