Alert archive / Iowa / Special Weather Statements in 2015

Special Weather Statement, NWS Omaha, NE

August 9, 2015Page County, Iowa

NWS Omaha, NE issued this special weather statement at Aug 9, 2015, 1:45 AM CDT for Page County, Iowa. It was in force for 30 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 9, 2015, 1:45 AM CDT (06:45 UTC)
Expired
Aug 9, 2015, 2:15 AM CDT
In force
30 min
Issued by
NWS Omaha, NE

County Page County, IA

The radar

The Omaha radar (KOAX), 134 km from the middle of the area, began a volume at 06:47 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, 6.8 hours before the alert went out and 134 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-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2015-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 430 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2015-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
430 J/kg
Mixed-layer CIN
-176 J/kg
Mixed-layer LCL
1221 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
277 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.2

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 9, 12:10 AM CDT, 1 hour 35 minutes earlier.

Area forecast discussion, Aug 9, 12:10 AM CDT, 1 hour 35 minutes before
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Hazardous weather outlook, Aug 8, 6:29 PM CDT, 7 hours 16 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
629 PM CDT SAT AUG 8 2015

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-091330-
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-
629 PM CDT SAT AUG 8 2015

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 SUNDAY

SCATTERED THUNDERSTORMS ARE LIKELY TO DEVELOP THIS
EVENING...MAINLY IN WEST CENTRAL TO SOUTHWEST IOWA INTO
SOUTHEAST NEBRASKA. THESE STORMS MAY BE STRONG TO SEVERE...WITH
HAIL AND GUSTY WINDS THE MAIN HAZARDS...AS WELL AS LOCALLY HEAVY
RAINFALL.

THUNDERSTORMS ARE POSSIBLE AGAIN ON SUNDAY AFTERNOON AND
EVENING...MAINLY IN NORTHEAST NEBRASKA. A FEW OF THESE STORMS
MAY BE STRONG TO SEVERE...WITH HAIL AND GUSTY WINDS THE MAIN
HAZARDS.

.DAYS TWO THROUGH SEVEN...SUNDAY NIGHT THROUGH FRIDAY

A CHANCE OF THUNDERSTORMS CONTINUES ON SUNDAY NIGHT INTO MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT OR SUNDAY.

MAYES

In the hours before

Special weather statement, Aug 9, 12:10 AM CDT, 1 hour 35 minutes before
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Special weather statement, Aug 9, 12:20 AM CDT, 1 hour 25 minutes before
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Special weather statement, Aug 9, 12:58 AM CDT, 47 minutes before
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Special weather statement, Aug 9, 1:40 AM CDT, 5 minutes before
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Special weather statement, Aug 9, 1:42 AM CDT, 3 minutes before
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Special weather statement, Aug 9, 1:45 AM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 8:01 PM CDTSpecial Weather StatementOAXNemaha44 min
Aug 8, 8:38 PM CDTSevere Thunderstorm WarningOAXNemaha52 min
Aug 8, 8:57 PM CDTTornado WarningOAXNemaha, Richardson33 min
Aug 8, 9:02 PM CDTSevere Thunderstorm WarningOAXNemaha28 min
Aug 8, 9:18 PM CDTSevere Thunderstorm WarningOAXJohnson, Nemaha27 min
Aug 8, 9:25 PM CDTTornado WarningOAXJohnson, Nemaha35 min
Aug 8, 9:31 PM CDTSevere Thunderstorm WarningOAXNemaha, Richardson29 min
Aug 8, 10:00 PM CDTSevere Thunderstorm WarningOAXNemaha, Richardson45 min
Aug 8, 10:13 PM CDTAreal Flood AdvisoryOAXJohnson, Nemaha, Pawnee, Richardson3 hr
Aug 8, 10:16 PM CDTSevere Thunderstorm WarningOAXRichardson29 min
Aug 8, 10:27 PM CDTSevere Thunderstorm WarningOAXRichardson18 min
Aug 8, 10:33 PM CDTTornado WarningOAXRichardson27 min
Aug 8, 10:45 PM CDTSevere Thunderstorm WarningOAXRichardson30 min
Aug 8, 11:24 PM CDTSpecial Weather StatementOAXCass51 min
Aug 9, 12:04 AM CDTAreal Flood AdvisoryOAXDouglas, Sarpy3 hr
Aug 9, 12:20 AM CDTSpecial Weather StatementOAXCass40 min
Aug 9, 12:58 AM CDTSpecial Weather StatementOAXCass47 min
Aug 9, 2:19 AM CDTAreal Flood AdvisoryOAXCass, Sarpy3 hr
Aug 9, 2:43 PM CDTSpecial Weather StatementOAXKnox47 min
Aug 9, 2:50 PM CDTSevere Thunderstorm WarningOAXAntelope, Knox40 min
Aug 9, 2:58 PM CDTSevere Thunderstorm WarningOAXKnox32 min
Aug 9, 3:31 PM CDTSpecial Weather StatementOAXAntelope44 min
Aug 9, 3:39 PM CDTSpecial Weather StatementOAXKnox36 min
Aug 9, 4:17 PM CDTSpecial Weather StatementOAXPierce43 min
Aug 9, 4:52 PM CDTSpecial Weather StatementOAXMadison38 min
Aug 9, 5:04 PM CDTSevere Thunderstorm WarningOAXAntelope, Madison, Pierce26 min
Aug 9, 5:36 PM CDTSpecial Weather StatementOAXMadison39 min
Aug 9, 5:59 PM CDTSpecial Weather StatementOAXBoone46 min
Aug 9, 6:07 PM CDTAreal Flood AdvisoryOAXAntelope, Madison3 hr
Aug 9, 6:12 PM CDTSpecial Weather StatementOAXMadison48 min
Aug 9, 6:25 PM CDTSpecial Weather StatementOAXKnox50 min
Aug 9, 6:30 PM CDTFlash Flood WarningOAXAntelope, Madison3 hr
Aug 9, 6:41 PM CDTSpecial Weather StatementOAXBoone49 min
Aug 8, 8:29 PM CDTSpecial Weather StatementOAXFremont46 min
Aug 8, 9:21 PM CDTSevere Thunderstorm WarningOAXMontgomery, Page39 min
Aug 8, 9:45 PM CDTSevere Thunderstorm WarningOAXMontgomery33 min
Aug 8, 9:50 PM CDTSpecial Weather StatementOAXMills40 min
Aug 9, 12:10 AM CDTSpecial Weather StatementOAXFremont, Page50 min
Aug 9, 12:32 AM CDTAreal Flood AdvisoryOAXFremont3 hr
Aug 9, 1:21 AM CDTSevere Thunderstorm WarningOAXFremont, Page24 min
Aug 9, 1:40 AM CDTSpecial Weather StatementOAXFremont50 min
Aug 9, 1:42 AM CDTSpecial Weather StatementOAXMills48 min
Aug 9, 3:42 AM CDTAreal Flood AdvisoryOAXFremont, Page3 hr
Aug 9, 10:08 AM CDTRiver Flood WarningOAXFremont7 days
Aug 9, 10:59 AM CDTRiver Flood WarningOAXFremont36 hr

Nearby

Special Weather Statements in Iowa, 2015Every special weather statement in 2015

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.