Alert archive / Iowa / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 83, NWS Omaha, NE

March 30, 2006Pottawattamie County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Mar 30, 2006, 4:26 PM CST for Pottawattamie County, Iowa. It was in force for 31 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: Mar 30, 2006, 4:26 PM CST (22:26 UTC)
Expired: Mar 30, 2006, 4:57 PM CST
In force: 31 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

County Pottawattamie County, IA

The radar

The Omaha radar (KOAX), 69 km from the middle of the area, began a volume at 22:29 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
Mar 30, 2:15 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.4 hours before the alert went out and 69 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: 34 J/kg
Mixed-layer CIN: -342 J/kg
Mixed-layer LCL: 611 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 322 m²/s²
0-3 km storm-relative helicity: 310 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Mar 30, 1:38 PM CST, 2 hours 48 minutes earlier.

Area forecast discussion, Mar 30, 1:38 PM CST, 2 hours 48 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
138 PM CST THU MAR 30 2006

.SHORT TERM...TONIGHT THROUGH SATURDAY.
IMMEDIATE CONCERNS WILL BE ONGOING CONVECTION.

CURRENTLY UNDER A MODERATE RISK WITH A TORNADO WATCH OUT FOR THE
SOUTHEAST PORTION OF THE FORECAST AREA.

LATEST SURFACE ANALYSIS HAS THE DOUBLE-BARRELED LOW PRESSURE
SYSTEM FM SD THRU NC KS. 50S TO LOWER 60S DEWPOINTS ARE STREAMING
NORTHWARD AND SHEAR/INSTABILITY PARAMETERS ARE BEING MAXIMIZED
OVER SOUTHEAST NEBRASKA. THIS AREA WILL BE THE FOCUS...SHIFTING
INTO SW IOWA AS THE SFC LOW LIFTS NORTHEAST INTO SOUTHERN
MINNESOTA OVERNIGHT. WILL CONTINUE TO MONITOR SHORT TERM SITUATION
FOR ADDITIONAL WATCHES AND WARNINGS INTO THIS EVENING WITH
NUMEROUS STORMS ON THE 88D. HEAVY RAIN ALSO A CONSIDERATION WITH THE
STORMS PUTTING DOWN GOOD RAINS. WRAPAROUND PRECIPITATION FOR THE
NORTHEAST PORTIONS OF THE FORECAST AREA OVERNIGHT AND FRIDAY
MORNING.

COOLER TEMPERATURES FOR FRIDAY WITH DECREASING WINDS AND SFC HIGH
PRES BUILDING IN. LOOK FOR GRADUAL CLEARING WITH THE SUBSIDENCE
AND DRYING. LOW PRESSURE DEVELOPS OVER SOUTHEAST COLORADO
SATURDAY. MAY SEE SOME ELEVATED SHOWERS OR SPRINKLES. CUT BACK ON
THE POPS A LITTLE.

.LONG TERM...SATURDAY NIGHT THROUGH THURSDAY.
DISCUSSION WILL BE SHORT IN ANTICIPATION OF SHORT TERM CONVECTION
THIS AFTN. ONLY MINOR TWEAKS MADE...IN PARTICULAR HAVE PULLED POPS
MONDAY NIGHT AND TUESDAY. DYNAMICS NOT ALL THAT FAVORABLE AND
MOISTURE RETURN NOT QUITE ESTABLISHED YET. OTHERWISE...HAVE KEPT
THUNDER CHANCES GOING DAYS 6 & 7. FAMILIAR SCENARIO SETTING UP
WITH MREF DEVELOPING WRN CONUS SYSTEM EJECTING EASTWARD INTO THE
PLAINS BY THURSDAY AND EVENTUALLY INDUCING SURFACE LOW OVER HIGH
PLAINS...AND ASSOCIATED BOUNDARIES CROSSING THROUGH THE CWA.
BOTTOM LINE IS THAT PCPN & STRONG STORMS LOOK FAVORABLE DAYS 6 AND
7.

&&

.OAX WATCHES/WARNINGS/ADVISORIES...
NE...NONE.
IA...NONE.
&&

ZAPOTOCNY/EASTLACK

Hazardous weather outlook, Mar 30, 10:29 AM CST, 5 hours 57 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1029 AM CST THU MAR 30 2006

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-310000-
ANTELOPE-BOONE-BURT-BUTLER-CASS-CEDAR-COLFAX-CUMING-DODGE-DOUGLAS-
FREMONT IA-GAGE-HARRISON IA-JEFFERSON-JOHNSON-KNOX-LANCASTER-MADISON-
MILLS IA-MONONA IA-MONTGOMERY IA-NEMAHA-OTOE-PAGE IA-PAWNEE-PIERCE-
PLATTE-POTTAWATTAMIE IA-RICHARDSON-SALINE-SARPY-SAUNDERS-SEWARD-
SHELBY IA-STANTON-THURSTON-WASHINGTON-WAYNE-
1029 AM CST THU MAR 30 2006

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

SEVERE THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND THIS EVENING
OVER PARTS OF EASTERN NEBRASKA AND SOUTHWEST IOWA.  ALL OF THESE
STORMS WILL HAVE THE POTENTIAL TO PRODUCE LARGE HAIL AND DAMAGING
WINDS.  THUNDERSTORMS THAT ARE SOUTH OF INTERSTATE 80 WILL HAVE THE
HIGHEST POTENTIAL FOR ISOLATED TORNADOES...AND THESE STORMS ARE
MORE LIKELY DURING THE EARLY AND MID AFTERNOON HOURS.

THE STORMS WILL MOVE TO THE NORTHEAST AT 40 TO 50 MPH AND SHOULD
HAVE FAIRLY LOW CLOUD BASES.  SPOTTER GROUPS SHOULD BE PREPARED TO
ACT QUICKLY.

THE SEVERE WEATHER IS THE RESULT OF INTENSE LOW PRESSURE
TRACKING FROM SOUTH CENTRAL NEBRASKA INTO NORTHWEST IOWA.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THUNDERSTORMS WILL BE POSSIBLE AGAIN ON SUNDAY FOR PARTS OF SOUTHEAST
NEBRASKA AND SOUTHWEST IOWA. INTENSE LOW PRESSURE WILL TRACK FROM
SOUTHEAST NEBRASKA INTO SOUTHERN IOWA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED THIS AFTERNOON AND THIS
EVENING. A CONFERENCE CALL WILL TAKE PLACE AT 11 AM CST.

NIETFELD

In the hours before

Local storm report, Mar 30, 4:05 PM CST, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
405 PM CST THU MAR 30 2006

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

0401 PM     HAIL             BELLEVUE                41.16N 95.92W
03/30/2006  E0.88 INCH       SARPY              NE   TRAINED SPOTTER

&&

DEWALD

Local storm report, Mar 30, 4:07 PM CST, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
407 PM CST THU MAR 30 2006

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

0230 PM     TSTM WND DMG     HARBINE                 40.19N 96.97W
03/30/2006                   JEFFERSON          NE   EMERGENCY MNGR

            EMPTY SEMI-TRAILER BLOWN OFF THE ROAD.

0255 PM     TSTM WND DMG     4 N PILGER              42.07N 97.05W
03/30/2006                   STANTON            NE   EMERGENCY MNGR

            SEMI-TRAILER OVERTURNED.

0255 PM     TSTM WND DMG     7 NW HOWELLS            41.79N 97.10W
03/30/2006                   STANTON            NE   EMERGENCY MNGR

            SEMI-TRAILER OVERTURNED- HWY 15.

&&

CZAPOTOC

Local storm report, Mar 30, 4:15 PM CST, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
415 PM CST THU MAR 30 2006

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

0405 PM     TSTM WND DMG     OMAHA                   41.26N 96.01W
03/30/2006                   DOUGLAS            NE   BROADCAST MEDIA

            SEMI BLOWN OFF ROADWAY AT THE I80 AND I480 SPLIT.

&&

DEWALD

Local storm report, Mar 30, 4:20 PM CST, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
420 PM CST THU MAR 30 2006

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

0410 PM     TSTM WND DMG     OMAHA                   41.26N 96.01W
03/30/2006                   DOUGLAS            NE   PUBLIC

            STRUCTURAL DAMAGE REPORTED AT 44TH AND I STREET TO A
            BUILDING.

&&

DEWALD

Local storm report, Mar 30, 4:24 PM CST, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
424 PM CST THU MAR 30 2006

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

0400 PM     TSTM WND DMG     PAPILLION               41.16N 96.04W
03/30/2006                   SARPY              NE   BROADCAST MEDIA

            SIGNIFICANT DAMAGE REPORTED IN THE PAPIILLION AREA.
            SEVERAL TREES DOWN. POWER LINES DOWN. FENCE LINE BLOWN
            DOWN NEAR 72ND AND CENTENNIAL STREETS.

&&

DEWALD

Local storm report, Mar 30, 4:25 PM CST, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
425 PM CST THU MAR 30 2006

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

0345 PM     TSTM WND DMG     PLATTSMOUTH             41.01N 95.89W
03/30/2006                   CASS               NE   PUBLIC

            HWY 50 AND 34 TRAFFIC LIGHTS DOWN. TRUCK LIFTED OFF THE
            GROUND.

0355 PM     TSTM WND GST     RALSTON                 41.20N 96.04W
03/30/2006  E60 MPH          DOUGLAS            NE   PUBLIC

            84TH AND L.

0410 PM     TSTM WND DMG     1 E THURMAN             40.82N 95.73W
03/30/2006                   FREMONT            IA   PUBLIC

            GRAIN BINS AND POWER LINES BLOWN OVER.

&&

CZAPOTOC

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 5:18 AM CST	Severe Thunderstorm Warning	OAX	Lancaster, Saunders	27 min
Mar 30, 6:56 AM CST	Severe Thunderstorm Warning	OAX	Jefferson, Saline	34 min
Mar 30, 7:01 AM CST	Severe Thunderstorm Warning	OAX	Douglas	28 min
Mar 30, 8:16 AM CST	Severe Thunderstorm Warning	OAX	Lancaster, Seward	29 min
Mar 30, 8:51 AM CST	Severe Thunderstorm Warning	OAX	Saunders	24 min
Mar 30, 10:29 AM CST	Severe Thunderstorm Warning	OAX	Boone	46 min
Mar 30, 10:45 AM CST	Severe Thunderstorm Warning	OAX	Dodge	28 min
Mar 30, 11:12 AM CST	Severe Thunderstorm Warning	OAX	Antelope, Madison	33 min
Mar 30, 11:23 AM CST	Severe Thunderstorm Warning	OAX	Pierce	52 min
Mar 30, 11:36 AM CST	Severe Thunderstorm Warning	OAX	Knox	39 min
Mar 30, 11:40 AM CST	Severe Thunderstorm Warning	OAX	Wayne	37 min
Mar 30, 11:46 AM CST	Severe Thunderstorm Warning	OAX	Madison	33 min
Mar 30, 11:54 AM CST	Severe Thunderstorm Warning	OAX	Boone	51 min
Mar 30, 12:04 PM CST	Severe Thunderstorm Warning	OAX	Gage, Jefferson	26 min
Mar 30, 12:12 PM CST	Severe Thunderstorm Warning	OAX	Cedar	48 min
Mar 30, 12:14 PM CST	Severe Thunderstorm Warning	OAX	Pierce	46 min
Mar 30, 12:23 PM CST	Severe Thunderstorm Warning	OAX	Lancaster, Saline	37 min
Mar 30, 12:29 PM CST	Severe Thunderstorm Warning	OAX	Antelope	46 min
Mar 30, 12:29 PM CST	Severe Thunderstorm Warning	OAX	Gage, Jefferson	31 min
Mar 30, 12:36 PM CST	Severe Thunderstorm Warning	OAX	Dodge	39 min
Mar 30, 12:44 PM CST	Severe Thunderstorm Warning	OAX	Boone	46 min
Mar 30, 12:58 PM CST	Severe Thunderstorm Warning	OAX	Gage, Lancaster	47 min
Mar 30, 1:00 PM CST	Severe Thunderstorm Warning	OAX	Cedar	45 min
Mar 30, 1:06 PM CST	Severe Thunderstorm Warning	OAX	Pierce	39 min
Mar 30, 1:18 PM CST	Severe Thunderstorm Warning	OAX	Johnson, Pawnee	29 min
Mar 30, 1:22 PM CST	Severe Thunderstorm Warning	OAX	Madison	23 min
Mar 30, 1:30 PM CST	Severe Thunderstorm Warning	OAX	Boone	45 min
Mar 30, 1:31 PM CST	Severe Thunderstorm Warning	OAX	Saunders	44 min
Mar 30, 1:34 PM CST	Severe Thunderstorm Warning	OAX	Platte	41 min
Mar 30, 1:43 PM CST	Severe Thunderstorm Warning	OAX	Lancaster	16 min
Mar 30, 1:43 PM CST	Tornado Warning	OAX	Pierce	47 min
Mar 30, 1:45 PM CST	Severe Thunderstorm Warning	OAX	Cedar	45 min
Mar 30, 1:47 PM CST	Tornado Warning	OAX	Platte	43 min
Mar 30, 1:50 PM CST	Severe Thunderstorm Warning	OAX	Cass, Otoe	25 min
Mar 30, 1:52 PM CST	Severe Thunderstorm Warning	OAX	Madison	38 min
Mar 30, 1:52 PM CST	Severe Thunderstorm Warning	OAX	Douglas, Washington	23 min
Mar 30, 2:03 PM CST	Tornado Warning	OAX	Platte	42 min
Mar 30, 2:11 PM CST	Severe Thunderstorm Warning	OAX	Gage, Jefferson	34 min
Mar 30, 2:14 PM CST	Tornado Warning	OAX	Pierce	31 min
Mar 30, 2:22 PM CST	Severe Thunderstorm Warning	OAX	Douglas, Sarpy	17 min
Mar 30, 2:31 PM CST	Severe Thunderstorm Warning	OAX	Lancaster, Seward	29 min
Mar 30, 2:32 PM CST	Severe Thunderstorm Warning	OAX	Cedar, Wayne	58 min
Mar 30, 2:33 PM CST	Severe Thunderstorm Warning	OAX	Butler	42 min
Mar 30, 2:38 PM CST	Severe Thunderstorm Warning	OAX	Colfax	41 min
Mar 30, 2:40 PM CST	Severe Thunderstorm Warning	OAX	Stanton	27 min
Mar 30, 2:44 PM CST	Severe Thunderstorm Warning	OAX	Gage	31 min
Mar 30, 2:46 PM CST	Severe Thunderstorm Warning	OAX	Cuming	51 min
Mar 30, 2:56 PM CST	Severe Thunderstorm Warning	OAX	Johnson	34 min
Mar 30, 3:08 PM CST	Severe Thunderstorm Warning	OAX	Lancaster	25 min
Mar 30, 3:11 PM CST	Tornado Warning	OAX	Thurston	34 min
Mar 30, 3:15 PM CST	Severe Thunderstorm Warning	OAX	Dodge, Saunders	33 min
Mar 30, 3:18 PM CST	Severe Thunderstorm Warning	OAX	Pawnee	27 min
Mar 30, 3:19 PM CST	Severe Thunderstorm Warning	OAX	Cass, Otoe	41 min
Mar 30, 3:22 PM CST	Severe Thunderstorm Warning	OAX	Burt	38 min
Mar 30, 3:27 PM CST	Severe Thunderstorm Warning	OAX	Washington	33 min
Mar 30, 3:30 PM CST	Tornado Warning	OAX	Douglas, Saunders	30 min
Mar 30, 3:46 PM CST	Severe Thunderstorm Warning	OAX	Sarpy	29 min
Mar 30, 3:52 PM CST	Tornado Warning	OAX	Douglas, Sarpy	23 min
Mar 30, 3:59 PM CST	Severe Thunderstorm Warning	OAX	Washington	16 min
Mar 30, 3:01 PM CST	Severe Thunderstorm Warning	OAX	Harrison	18 min
Mar 30, 3:45 PM CST	Severe Thunderstorm Warning	OAX	Harrison, Monona	60 min
Mar 30, 4:02 PM CST	Severe Thunderstorm Warning	OAX	Fremont, Mills	37 min
Mar 30, 4:05 PM CST	Tornado Warning	OAX	Pottawattamie	25 min
Mar 30, 4:08 PM CST	Tornado Warning	OAX	Harrison	37 min
Mar 30, 4:23 PM CST	Severe Thunderstorm Warning	OAX	Monona	37 min
Mar 30, 4:26 PM CST	Severe Thunderstorm Warning	OAX	Montgomery, Page	49 min
Mar 30, 4:34 PM CST	Tornado Warning	OAX	Shelby	20 min
Mar 30, 4:53 PM CST	Tornado Warning	OAX	Montgomery	17 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2006 Every severe thunderstorm warning in 2006

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.