Alert archive / Iowa / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 199, NWS Omaha, NE

July 18, 2007Monona County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Jul 18, 2007, 11:00 PM CDT for Monona County, Iowa. It was in force for 45 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: Jul 18, 2007, 11:00 PM CDT (04:00 UTC)
Expired: Jul 18, 2007, 11:45 PM CDT
In force: 45 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

County Monona County, IA

The radar

The Omaha radar (KOAX), 88 km from the middle of the area, began a volume at 04:02 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.

Issued	Product	Office	Lasted
Jul 18, 8:39 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

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 Jul 18, 2:10 PM CDT, 8 hours 50 minutes earlier.

Area forecast discussion, Jul 18, 2:10 PM CDT, 8 hours 50 minutes before

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Hazardous weather outlook, Jul 18, 5:30 PM CDT, 5 hours 30 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
530 PM CDT WED JUL 18 2007

IAZ043-055-056-NEZ011-012-015>018-030>034-042>045-191230-
MONONA-HARRISON-SHELBY-KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-
BOONE-MADISON-STANTON-CUMING-BURT-PLATTE-COLFAX-DODGE-WASHINGTON-
530 PM CDT WED JUL 18 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA AND NORTHEAST
NEBRASKA.

.DAY ONE...TONIGHT AND THURSDAY

SEVERE THUNDERSTORMS ARE LIKELY THIS EVENING AND TONIGHT NORTH OF
A LINE FROM COLUMBUS TO BLAIR TO HARLAN IOWA. LARGE HAIL AND
DAMAGING WINDS ARE THE MAIN HAZARDS...BUT AN ISOLATED TORNADO
CANNOT BE RULED OUT...ESPECIALLY ACROSS EXTREME NORTHEAST
NEBRASKA.

STORMS ARE EXPECTED TO DEVELOP ALONG A FRONTAL BOUNDARY OVER
NORTHEAST NEBRASKA EARLY THIS EVENING AND CONTINUE ALONG THE FRONT
AS IT MOVES SOUTH TONIGHT. ALSO...A THUNDERSTORM COMPLEX OVER
SOUTHWESTERN SOUTH DAKOTA IS EXPECTED TO ROLL SOUTHEAST TONIGHT
AND PROVIDE AN ADDITIONAL THREAT OF STRONG WINDS AND LARGE HAIL.

.DAYS TWO THROUGH SEVEN...THURSDAY NIGHT THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS EVENING...ESPECIALLY
ACROSS FAR NORTHEAST NEBRASKA.

IAZ069-079-080-090-091-NEZ050>053-065>068-090>093-191230-
POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-PAGE-BUTLER-SAUNDERS-
DOUGLAS-SARPY-SEWARD-LANCASTER-CASS-OTOE-JOHNSON-NEMAHA-PAWNEE-
RICHARDSON-
530 PM CDT WED JUL 18 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IOWA...EAST CENTRAL NEBRASKA AND SOUTHEAST NEBRASKA.

.DAY ONE...TONIGHT AND THURSDAY

SEVERE THUNDERSTORMS ARE POSSIBLE TONIGHT OVER EAST CENTRAL
NEBRASKA AND SOUTHWEST IOWA. STORMS ARE EXPECTED TO FORM NEAR THE
SOUTH DAKOTA BORDER THIS EVENING AND SPREAD SOUTH AND EAST
TONIGHT. LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN SEVERE
WEATHER THREATS THROUGH LATE TONIGHT.

THUNDERSTORM ACTIVITY MAY LINGER INTO EARLY AFTERNOON THURSDAY OVER
SOUTHEAST NEBRASKA.

.DAYS TWO THROUGH SEVEN...THURSDAY NIGHT THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TONIGHT.

NEZ078-088-089-191230-
SALINE-JEFFERSON-GAGE-
530 PM CDT WED JUL 18 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
NEBRASKA.

.DAY ONE...TONIGHT AND THURSDAY

THERE IS A SLIGHT CHANCE OF THUNDERSTORMS LATE TONIGHT ACROSS
GAGE...JEFFERSON AND SALINE COUNTIES. STORMS ARE NOT EXPECTED TO
BE SEVERE.

THUNDERSTORM ACTIVITY MAY LINGER INTO EARLY AFTERNOON THURSDAY.

.DAYS TWO THROUGH SEVEN...THURSDAY NIGHT THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT LIKELY BE NEEDED TONIGHT.

GRIFFIS

In the hours before

Local storm report, Jul 18, 10:58 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1058 PM CDT WED JUL 18 2007

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

1055 PM     TSTM WND GST     WAYNE                   42.24N 97.02W
07/18/2007  E60 MPH          WAYNE              NE   TRAINED SPOTTER

            TREE BRANCHES ALSO BLOWN DOWN.

&&

DEWALD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 8:53 PM CDT	Severe Thunderstorm Warning	OAX	Knox	52 min
Jul 18, 10:53 PM CDT	Severe Thunderstorm Warning	OAX	Wayne	37 min
Jul 18, 10:55 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Stanton	50 min
Jul 18, 10:57 PM CDT	Severe Thunderstorm Warning	OAX	Thurston	33 min
Jul 18, 11:02 PM CDT	Severe Thunderstorm Warning	OAX	Cuming	43 min
Jul 18, 11:05 PM CDT	Severe Thunderstorm Warning	OAX	Antelope	40 min
Jul 18, 11:26 PM CDT	Severe Thunderstorm Warning	OAX	Burt	49 min
Jul 18, 11:31 PM CDT	Severe Thunderstorm Warning	OAX	Thurston	38 min
Jul 18, 11:36 PM CDT	Severe Thunderstorm Warning	OAX	Dodge	39 min
Jul 18, 11:45 PM CDT	Severe Thunderstorm Warning	OAX	Washington	45 min
Jul 19, 12:03 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	42 min
Jul 19, 12:35 AM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie, Shelby	40 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2007 Every severe thunderstorm warning in 2007

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.