Severe Thunderstorm Warning 152, NWS Omaha, NE

Area Forecast Discussion
National Weather Service Omaha/Valley NE
320 PM CDT Mon Jun 18 2018

.SHORT TERM...(Tonight through Thursday)
Issued at 320 PM CDT Mon Jun 18 2018

Convection already firing across parts of the forecast area at 20Z
in advance of a shortwave trough lifing out of western KS. In
addition, two surface boundaries were also in place. A warm front
stretched from northeast NE across northern IA, while a surface
trough was over western KS. These two boundaries will play a large
role in focusing additional rounds of convection over the area
through much of the short term period as a developing upper level
system moves into the region.

Abundant moisture across the region and the nearly stationary
boundaries will provide the potential of several periods of heavy
rain. A flash flood watch has been issued for parts of the area
for tonight into Tuesday morning due to this heavy rain potential.

Temperatures will be cooler compared to the past few days, but the
humid conditions will continue to make for uncomfortable
conditions.

.LONG TERM...(Thursday night through Monday)
Issued at 320 PM CDT Mon Jun 18 2018

Pattern looks to remain rather active into the weekend as the
upper system mentioned above works its way out of the area and
additional shortwave troughs move through by the weekend.

&&

.AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon)
Issued at 1226 PM CDT Mon Jun 18 2018

Rather variable conditions forecast to develop over the area
during the period as convection becomes widespread through 06Z
with several boundaries expected over the area to act as a focus.

&&

.OAX WATCHES/WARNINGS/ADVISORIES...
NE...Flash Flood Watch from 7 PM CDT this evening through Tuesday
     afternoon for NEZ015-032>034-043>045-050>053.

IA...Flash Flood Watch from 7 PM CDT this evening through Tuesday
     afternoon for IAZ043-055-056-069.

&&

SHORT TERM...Fobert
LONG TERM...Fobert
AVIATION...Fobert

Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
350 PM CDT Mon Jun 18 2018

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-191100-
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-
350 PM CDT Mon Jun 18 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 Tuesday

Scattered strong to severe storms are expected to continue over
portions of eastern Nebraska and southwest Iowa late this
afternoon into this evening, mainly north of I-80. The primary
hazards with these storms will be damaging winds, heavy rain, and
some hail to quarter size. A brief tornado is also possible,
especially west of a Wayne to Columbus line.

Heavy rain is also likely tonight across the area and may result
in local flooding. A Flash Flood Watch is in effect for east
central Nebraska into west central Iowa tonight into Tuesday
morning.

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

Thunderstorm chances will remain in the forecast through the week
and into next weekend. Periods of heavy rain are possible.

.SPOTTER INFORMATION STATEMENT...

Storm spotter activation may be required into this evening.

Fobert

Special Weather Statement
National Weather Service Omaha/Valley Nebraska
454 PM CDT MON JUN 18 2018

NEZ051-066-182230-
Saunders NE-Lancaster NE-
454 PM CDT MON JUN 18 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN LANCASTER AND
SOUTHWESTERN SAUNDERS COUNTIES UNTIL 530 PM CDT...

At 454 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles southeast of Valparaiso, or 9 miles north of Lincoln, moving
northeast at 35 mph.

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

Locations impacted include...
Northwestern Lincoln, Valparaiso, Ceresco, Malcolm, Raymond, Davey
and Branched Oak State Recreation Area.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
east central Nebraska.

LAT...LON 4093 9692 4100 9691 4117 9680 4102 9649
      4082 9669
TIME...MOT...LOC 2154Z 210DEG 44KT 4095 9675

MEAD

Special Weather Statement
National Weather Service Omaha/Valley Nebraska
507 PM CDT MON JUN 18 2018

IAZ069-079-182230-
Pottawattamie IA-Mills IA-
507 PM CDT MON JUN 18 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MILLS AND SOUTH CENTRAL
POTTAWATTAMIE COUNTIES UNTIL 530 PM CDT...

At 506 PM CDT, Doppler radar was tracking a strong thunderstorm over
Glenwood, or 21 miles southeast of Omaha, moving northeast at 15 mph.

Dime size hail and wind gusts up to 50 mph will be possible with
this storm. A few brief funnel clouds have also been reported with
this storm.

Locations impacted include...
Glenwood, Malvern, Treynor, Pacific Junction, Silver City and
Hastings.

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

LAT...LON 4093 9574 4108 9585 4129 9559 4107 9540
TIME...MOT...LOC 2206Z 237DEG 13KT 4103 9574

MILLER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
509 PM CDT MON JUN 18 2018

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

0500 PM     TORNADO          1 S PACIFIC JUNCTION    41.01N 95.80W
06/18/2018                   MILLS              IA   PUBLIC

            RECEIVED SEVERAL REPORTS OF BRIEF WEAK
            TORNADO TOUCHING DOWN THEN LIFTING SEVERAL
            TIMES.

&&

HD

Special Weather Statement
National Weather Service Omaha/Valley Nebraska
519 PM CDT MON JUN 18 2018

NEZ051-053-066-067-182245-
Saunders NE-Cass NE-Sarpy NE-Lancaster NE-
519 PM CDT MON JUN 18 2018

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL SARPY...NORTHEASTERN
LANCASTER...SAUNDERS AND NORTHWESTERN CASS COUNTIES UNTIL 545 PM
CDT...

At 518 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 3 miles southwest of Weston to 4 miles
northwest of Waverly. Movement was northeast at 25 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Wahoo, Gretna, Waverly, Ashland, Yutan, Cedar Bluffs, Mead,
Greenwood, Weston, Ceresco, Davey, Ithaca, Malmo, Memphis, Colon and
Memphis State Recreation Area.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
east central Nebraska.

LAT...LON 4085 9655 4114 9687 4143 9665 4143 9664
      4113 9625
TIME...MOT...LOC 2218Z 208DEG 21KT 4114 9678 4097 9658

MILLER

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Special Weather Statement
National Weather Service Omaha/Valley Nebraska
541 PM CDT MON JUN 18 2018

IAZ055-069-NEZ045-051-052-182315-
Pottawattamie IA-Harrison IA-Saunders NE-Washington NE-Douglas NE-
541 PM CDT MON JUN 18 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN POTTAWATTAMIE...
SOUTHWESTERN HARRISON...EASTERN WASHINGTON...DOUGLAS AND EAST CENTRAL
SAUNDERS COUNTIES UNTIL 615 PM CDT...

At 541 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 4 miles northeast of Blair to near Yutan.
Movement was northeast at 30 mph.

Winds in excess of 40 mph and very heavy rain will be possible with
these storms.

Locations impacted include...
Western Omaha, Blair, Missouri Valley, Valley, Yutan, Fort Calhoun,
Waterloo, Kennard, Modale, Elkhorn, Millard, Bennington, Boys Town,
Washington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
southwestern Iowa...and east central Nebraska.

LAT...LON 4161 9581 4120 9611 4120 9647 4166 9611
TIME...MOT...LOC 2241Z 228DEG 26KT 4157 9606 4122 9638

MILLER