Alert archive / Iowa / Special Weather Statements in 2012

Special Weather Statement, NWS Omaha, NE

August 8, 2012Page County, Iowa

NWS Omaha, NE issued this special weather statement at Aug 8, 2012, 3:22 AM CDT for Page County, Iowa. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 8, 2012, 3:22 AM CDT (08:22 UTC)
Expired: Aug 8, 2012, 4:00 AM CDT
In force: 38 min
Issued by: NWS Omaha, NE

County Page County, IA

The radar

The Omaha radar (KOAX), 127 km from the middle of the area, began a volume at 08:25 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, 8.4 hours before the alert went out and 127 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: 2389 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 2263 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 8, 3:10 AM CDT, 12 minutes earlier.

Area forecast discussion, Aug 8, 3:10 AM CDT, 12 minutes before

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Hazardous weather outlook, Aug 7, 5:57 PM CDT, 9 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
557 PM CDT TUE AUG 7 2012

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-081300-
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-
557 PM CDT TUE AUG 7 2012

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 WEDNESDAY

ISOLATED THUNDERSTORMS ARE POSSIBLE THIS EVENING...MAINLY SOUTH OF
HIGHWAY 30. A SPOTTY FEW OF THESE STORMS COULD CONTAIN LARGE HAIL
AND DAMAGING WIND. THE CHANCE FOR STORMS CONTINUES OVERNIGHT AS
STORMS MOVE OUT OF WESTERN NEBRASKA...WITH THE BETTER CHANCE
REMAINING SOUTH OF INTERSTATE 80 AND A SLIGHT CHANCE ELSEWHERE.

ISOLATED STORMS ARE POSSIBLE ON WEDNESDAY...MAINLY IN WESTERN
IOWA AND EXTREME NORTHEAST NEBRASKA.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THERE IS A SLIGHT CHANCE FOR STORMS ON SATURDAY...MAINLY IN
NORTHEAST NEBRASKA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT OR WEDNESDAY.

In the hours before

Special weather statement, Aug 7, 9:39 PM CDT, 5 hours 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
939 PM CDT TUE AUG 7 2012

IAZ043-055-056-NEZ034-080315-
MONONA IA-SHELBY IA-HARRISON IA-BURT NE-
939 PM CDT TUE AUG 7 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MONONA...WESTERN
SHELBY...HARRISON AND SOUTHEASTERN BURT COUNTIES UNTIL 1015 PM CDT...

AT 938 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
TRACKING A LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING
FROM TEKAMAH TO MONDAMIN TO 7 MILES SOUTHEAST OF MISSOURI VALLEY...
OR ALONG A LINE EXTENDING FROM 46 MILES SOUTH OF SIOUX CITY TO 49
MILES SOUTHWEST OF IDA GROVE TO 21 MILES NORTHEAST OF OMAHA...AND
MOVING NORTHEAST AT 20 MPH.

HAIL UP TO THE SIZE OF DIMES AND WIND GUSTS UP TO 40 MPH WILL BE
POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
TEKAMAH...LOGAN...MONDAMIN...PERSIA...PISGAH...MOORHEAD...WOODBINE...
DUNLAP...BLENCOE...PORTSMOUTH...LITTLE SIOUX...PANAMA AND
MAGNOLIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL DOWNPOURS WILL ALSO BE POSSIBLE WITH THE STORMS.

&&

LAT...LON 4150 9575 4151 9581 4165 9597 4180 9639
      4199 9615 4197 9567 4187 9567 4186 9553
      4165 9536
TIME...MOT...LOC 0238Z 220DEG 25KT 4183 9624 4171 9592 4152 9576

DEWALD

Special weather statement, Aug 8, 3:22 AM CDT, 0 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
Aug 7, 7:09 PM CDT	Special Weather Statement	OAX	Sarpy	36 min
Aug 7, 7:19 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Sarpy	41 min
Aug 7, 7:22 PM CDT	Special Weather Statement	OAX	Platte	23 min
Aug 7, 7:28 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Platte	47 min
Aug 7, 7:47 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Sarpy	43 min
Aug 7, 8:01 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Sarpy	29 min
Aug 7, 9:12 PM CDT	Special Weather Statement	OAX	Douglas	33 min
Aug 7, 9:17 PM CDT	Severe Thunderstorm Warning	OAX	Douglas, Washington	24 min
Aug 8, 11:57 AM CDT	Special Weather Statement	OAX	Burt, Cuming, Dodge, Washington	48 min
Aug 8, 4:09 PM CDT	Special Weather Statement	OAX	Otoe	36 min
Aug 8, 4:17 PM CDT	Special Weather Statement	OAX	Dodge	28 min
Aug 8, 4:34 PM CDT	Special Weather Statement	OAX	Otoe	26 min
Aug 8, 4:38 PM CDT	Tornado Warning	OAX	Dodge, Saunders	37 min
Aug 8, 4:43 PM CDT	Special Weather Statement	OAX	Cass	32 min
Aug 8, 4:46 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Otoe	44 min
Aug 8, 4:52 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Lancaster	38 min
Aug 8, 5:01 PM CDT	Tornado Warning	OAX	Dodge, Saunders	29 min
Aug 8, 5:31 PM CDT	Special Weather Statement	OAX	Richardson	29 min
Aug 8, 5:42 PM CDT	Special Weather Statement	OAX	Cass, Sarpy	33 min
Aug 8, 5:46 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Sarpy	29 min
Aug 8, 6:14 PM CDT	Severe Thunderstorm Warning	OAX	Cass	31 min
Aug 8, 6:25 PM CDT	Severe Thunderstorm Warning	OAX	Sarpy	35 min
Aug 8, 6:46 PM CDT	Severe Thunderstorm Warning	OAX	Douglas	29 min
Aug 7, 9:39 PM CDT	Special Weather Statement	OAX	Harrison	36 min
Aug 8, 12:13 PM CDT	Special Weather Statement	OAX	Monona	32 min
Aug 8, 12:46 PM CDT	Special Weather Statement	OAX	Monona	29 min
Aug 8, 1:06 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie	26 min
Aug 8, 1:51 PM CDT	Special Weather Statement	OAX	Pottawattamie	54 min
Aug 8, 6:09 PM CDT	Special Weather Statement	OAX	Mills	36 min
Aug 8, 6:32 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	28 min
Aug 8, 6:56 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Page	34 min

Nearby

Special Weather Statements in Iowa, 2012 Every special weather statement in 2012

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.