Alert archive / Iowa / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 19, NWS Omaha, NE

April 27, 20144 counties in Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Apr 27, 2014, 10:39 AM CDT for 4 counties in Iowa. It was in force for 36 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: Apr 27, 2014, 10:39 AM CDT (15:39 UTC)
Expired: Apr 27, 2014, 11:15 AM CDT
In force: 36 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA

The radar

The Omaha radar (KOAX), 95 km from the middle of the area, began a volume at 15:41 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.

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 Apr 27, 6:26 AM CDT, 4 hours 13 minutes earlier.

Area forecast discussion, Apr 27, 6:26 AM CDT, 4 hours 13 minutes before

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Hazardous weather outlook, Apr 27, 4:48 AM CDT, 5 hours 51 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
448 AM CDT SUN APR 27 2014

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-280000-
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 AM CDT SUN APR 27 2014

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

SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS ALL OF EASTERN NEBRASKA
AND SOUTHWEST IOWA TODAY. ALL MODES OF SEVERE ARE
POSSIBLE...INCLUDING LARGE HAIL...DAMAGING WINDS AND TORNADOES.

THUNDERSTORMS IN EASTERN KANSAS WILL SPREAD INTO SOUTHEAST
NEBRASKA EARLY IN THE DAY. HIGH INSTABILITY AND MODERATE SHEAR
WILL EXIST FOR THE POTENTIAL FOR LARGE HAIL THROUGH MID MORNING.

THIS AREA OF THUNDERSTORMS WILL EXPAND NORTH AND NORTHWEST THROUGH
THE MORNING...WITH INCREASING LEVELS OF INSTABILITY AND SHEAR.
LARGE HAIL AND DAMAGING WINDS WILL BE THE PRIMARY HAZARDS FROM MID
MORNING THROUGH THE EARLY AFTERNOON FOR AREAS GENERALLY SOUTH OF A
LINE FROM NELIGH TO NORFOLK...MISSOURI VALLEY AND HARLAN...WITH
LARGE HAIL THE PRIMARY THREAT TO THE NORTH.

BY MID AFTERNOON...THE INTERACTION OF A DRY LINE MOVING INTO
SOUTHEAST NEBRASKA AND A WARM FRONT FROM COLUMBUS TO OMAHA AND RED
OAK WILL BRING AN INCREASED THREAT OF ALL MODES OF SEVERE STORMS.
STRONG SHEAR WILL BE IN PLACE AHEAD OF A POTENT UPPER LEVEL STORM
SYSTEM. THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THE DRY LINE
IN SOUTH CENTRAL NEBRASKA AND NORTHEAST KANSAS...AND MOVE RAPIDLY
NORTHEAST. AS THESE STORMS INTERACT WITH THE WARM FRONT...AN
INCREASED POTENTIAL FOR TORNADOES WILL EXIST. AS THE WARM FRONT
LIFTS NORTHEAST DURING THE LATE AFTERNOON AND EVENING...THIS
TORNADIC POTENTIAL WILL ALSO LIFT INTO NORTHEAST NEBRASKA AND WEST
CENTRAL IOWA. WHILE THERE IS A POTENTIAL FOR TORNADOES ACROSS ALL
OF THE OUTLOOK AREA FROM MID AFTERNOON INTO THE EVENING WITH ANY
STORMS THAT DEVELOP DURING THAT TIME...THE HIGHEST POTENTIAL
SHOULD EXIST ALONG THE WARM FRONT FROM COLUMBUS TO OMAHA AND RED
OAK...THEN SPREADING NORTH ACROSS NORTHEAST NEBRASKA AND WEST
CENTRAL IOWA BY EARLY EVENING.

THE CHANCE FOR STORMS WILL END FROM SOUTHWEST TO NORTHEAST ACROSS
THE AREA THIS EVENING. MUCH OF SOUTHEAST NEBRASKA MAY SEE THE
THREAT END BY EARLY EVENING...WITH THE REST OF EASTERN NEBRASKA
AND SOUTHWEST IOWA SEEING STORMS ENDING AROUND OR SHORTLY AFTER
MIDNIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED TODAY AND THIS EVENING.

In the hours before

Special weather statement, Apr 27, 6:26 AM CDT, 4 hours 13 minutes before

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Special weather statement, Apr 27, 7:18 AM CDT, 3 hours 21 minutes before

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Special weather statement, Apr 27, 9:29 AM CDT, 1 hour 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
929 AM CDT SUN APR 27 2014

IAZ090-NEZ068-089>093-271500-
FREMONT IA-GAGE NE-JOHNSON NE-PAWNEE NE-OTOE NE-RICHARDSON NE-
NEMAHA NE-
929 AM CDT SUN APR 27 2014

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN FREMONT...JOHNSON...
SOUTHEASTERN GAGE...NEMAHA...SOUTHEASTERN OTOE...PAWNEE AND
RICHARDSON COUNTIES UNTIL 1000 AM CDT...

AT 928 AM CDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES NORTHWEST OF PAWNEE
CITY TO NEAR SABETHA...AND MOVING NORTHEAST AT 45 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
FALLS CITY...NEBRASKA CITY...AUBURN...TECUMSEH...HAMBURG...PAWNEE
CITY...HUMBOLDT...PERU...JOHNSON...COOK...TABLE ROCK...TALMAGE...
VERDON...STELLA...SHUBERT...LORTON...RULO...NEMAHA...DU BOIS AND
DAWSON.

LAT...LON 4000 9618 4021 9648 4058 9627 4075 9576
      4058 9559 4058 9578 4052 9575 4056 9568
      4055 9565 4047 9569 4046 9564 4034 9562
      4031 9566 4030 9557 4026 9555 4023 9547
      4018 9548 4012 9540 4004 9542 4000 9531
TIME...MOT...LOC 1428Z 209DEG 38KT 4022 9626 3986 9583

MAYES

Special weather statement, Apr 27, 9:57 AM CDT, 42 minutes before

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Local storm report, Apr 27, 9:59 AM CDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
959 AM CDT SUN APR 27 2014

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

0948 AM     HAIL             HUMBOLDT                40.17N 95.94W
04/27/2014  E0.88 INCH       RICHARDSON         NE   PUBLIC

&&

JB

Special weather statement, Apr 27, 10:16 AM CDT, 23 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
Apr 27, 5:51 AM CDT	Special Weather Statement	OAX	Johnson, Otoe	39 min
Apr 27, 6:12 AM CDT	Special Weather Statement	OAX	Gage	48 min
Apr 27, 6:26 AM CDT	Special Weather Statement	OAX	Gage	49 min
Apr 27, 7:18 AM CDT	Special Weather Statement	OAX	Lancaster	42 min
Apr 27, 9:29 AM CDT	Special Weather Statement	OAX	Johnson, Nemaha, Pawnee, Richardson	31 min
Apr 27, 9:57 AM CDT	Special Weather Statement	OAX	Nemaha	48 min
Apr 27, 4:11 PM CDT	Special Weather Statement	OAX	Saline	19 min
Apr 27, 5:40 PM CDT	Special Weather Statement	OAX	Platte	35 min
Apr 27, 6:20 PM CDT	Special Weather Statement	OAX	Madison	25 min
Apr 27, 6:31 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Platte	29 min
Apr 27, 6:56 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Pierce, Stanton, Wayne	49 min
Apr 27, 10:16 AM CDT	Special Weather Statement	OAX	Mills	29 min
Apr 27, 11:47 AM CDT	Special Weather Statement	OAX	Montgomery, Page	13 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2014 Every severe thunderstorm warning in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.