Alert archive / Nebraska / Special Weather Statements in 2012

Special Weather Statement, NWS Omaha, NE

April 15, 20125 counties in Nebraska; Fremont County, Page County, Iowa

NWS Omaha, NE issued this special weather statement at Apr 15, 2012, 2:05 AM CDT for 5 counties in Nebraska; Fremont County, Page County, Iowa. It was in force for 85 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: Apr 15, 2012, 2:05 AM CDT (07:05 UTC)
Expired: Apr 15, 2012, 3:30 AM CDT
In force: 85 min
Issued by: NWS Omaha, NE

Counties Fremont County, IA, Page County, IA, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Omaha radar (KOAX), 108 km from the middle of the area, began a volume at 07:06 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, 7.1 hours before the alert went out and 108 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 871 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 276 m²/s²
0-3 km storm-relative helicity: 483 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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 Apr 15, 12:51 AM CDT, 1 hour 14 minutes earlier.

Area forecast discussion, Apr 15, 12:51 AM CDT, 1 hour 14 minutes before

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Hazardous weather outlook, Apr 14, 11:17 PM CDT, 2 hours 48 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1117 PM CDT SAT APR 14 2012

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-151830-
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-
1117 PM CDT SAT APR 14 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 SUNDAY

STRONG THUNDERSTORMS ARE STILL POSSIBLE ACROSS THE OUTLOOK AREA
OVERNIGHT. A TORNADO WATCH REMAINS IN EFFECT FOR PORTIONS OF
SOUTHEAST NEBRASKA AS A WARM FRONT CONTINUES TO LIFT THROUGH THE
REGION. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE
REMAINDER OF NORTHEAST NEBRASKA AND WESTERN IOWA. IF THUNDERSTORMS
DEVELOP ALONG THE WARM FRONT...ALL MODES OF SEVERE WEATHER WITH
TORNADOES...LARGE HAIL AND DAMAGING WINDS WOULD BE POSSIBLE IN
THIS AREA. ACROSS NORTHEAST AND EAST CENTRAL NEBRASKA AND WESTERN
IOWA...LARGE HAIL AND DAMAGING WINDS WOULD BE THE PRIMARY
HAZARDS.

AHEAD OF A VERY STRONG AREA OF LOW PRESSURE ON SUNDAY...SOUTH TO
SOUTHWEST WINDS WILL INCREASE TO 30 TO 40 MPH WITH GUSTS IN EXCESS
OF 50 MPH POSSIBLE. A WIND ADVISORY HAS BEEN ISSUED FOR MOST OF
EASTERN NEBRASKA AND WESTERN IOWA FOR LATE SUNDAY MORNING THROUGH
SUNDAY EVENING.

IN ADDITION...THUNDERSTORMS MAY DEVELOP ALONG THE WARM FRONT NEAR
THE NEBRASKA AND SOUTH DAKOTA BORDER REGION SUNDAY AFTERNOON.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

AS THE SURFACE LOW PRESSURE MOVES THROUGH THE REGION...STRONG
NORTHWEST WINDS OF 25 TO 35 MPH WITH HIGHER GUSTS WILL BE POSSIBLE
IN NORTHEAST NEBRASKA SUNDAY EVENING.

A FEW THUNDERSTORMS MAY OCCUR ON MONDAY INTO TUESDAY NIGHT THEN
AGAIN FROM THURSDAY INTO FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY STILL BE BE NEEDED IN SOUTHEAST NEBRASKA
THROUGH EARLY SUNDAY MORNING.

In the hours before

Local storm report, Apr 15, 12:08 AM CDT, 1 hour 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1208 AM CDT SUN APR 15 2012

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

1208 AM     HAIL             4 SW WAVERLY            40.88N 96.58W
04/15/2012  M0.75 INCH       LANCASTER          NE   STORM CHASER

&&

VDEWALD

Special weather statement, Apr 15, 12:09 AM CDT, 1 hour 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1209 AM CDT SUN APR 15 2012

IAZ090-091-NEZ068-091>093-150545-
FREMONT IA-PAGE IA-RICHARDSON NE-NEMAHA NE-OTOE NE-PAWNEE NE-
1209 AM CDT SUN APR 15 2012

...SIGNIFICANT WEATHER ADVISORY FOR FREMONT...PAGE...RICHARDSON...
NEMAHA...SOUTHEASTERN OTOE AND PAWNEE COUNTIES...

STRONG WINDS...NOT ASSOCIATED WITH THUNDERSTORMS...ARE EXPECTED
ACROSS PARTS OF SOUTHEAST NEBRASKA AND SOUTHWEST IOWA THROUGH ABOUT
130 AM. THE STRONG WINDS WILL GUST FROM THE SOUTH AT 20 TO 35 MPH
WITH GUSTS TO 60 MPH. THIS CAN BLOW AROUND SMALL UNSECURE OBJECTS
OVER THE NEXT HOUR OR SO.

LOCATIONS IMPACTED INCLUDE...
FALLS CITY...CLARINDA...SHENANDOAH...AUBURN...SIDNEY...HAMBURG...
PAWNEE CITY...HUMBOLDT...ESSEX...PERU...FARRAGUT...RIVERTON...
TABLE ROCK...SHUBERT...COIN...VERDON...STELLA...COLLEGE SPRINGS...
RULO AND DAWSON.

LAT...LON 4024 9613 4026 9607 4033 9606 4089 9555
      4089 9493 4058 9492 4058 9578 4052 9574
      4056 9569 4055 9565 4047 9569 4046 9564
      4031 9566 4023 9547 4018 9548 4012 9539
      4005 9542 4000 9531 4000 9531 4000 9635
TIME...MOT...LOC 0507Z 224DEG 49KT 4037 9583

BOUSTEAD

Special weather statement, Apr 15, 12:12 AM CDT, 1 hour 53 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1212 AM CDT SUN APR 15 2012

IAZ069-NEZ045-052-150545-
POTTAWATTAMIE IA-DOUGLAS NE-WASHINGTON NE-
1212 AM CDT SUN APR 15 2012

...SIGNIFICANT WEATHER ADVISORY FOR POTTAWATTAMIE...DOUGLAS AND
SOUTHEASTERN WASHINGTON COUNTIES UNTIL 1245 AM CDT...

AT 1207 AM CDT...NWS METEOROLOGISTS REPORTED A STRONG THUNDERSTORM
NEAR VALLEY...OR 15 MILES WEST OF OMAHA...MOVING EAST AT 45 MPH.

HAIL UP TO THE SIZE OF PEAS AND WIND GUSTS UP TO 45 MPH WILL BE
POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
OMAHA...COUNCIL BLUFFS...MILLARD...RALSTON...ELKHORN...VALLEY...
FORT CALHOUN...UNDERWOOD...WATERLOO...CARTER LAKE...BENNINGTON...
BOYS TOWN...CRESCENT...MCCLELLAND AND WASHINGTON.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 275 NEAR MILE MARKER 167.
 HIGHWAY 92 BETWEEN MILE MARKERS 463 AND 466.
 INTERSTATE 29 BETWEEN MILE MARKERS 47 AND 71.
 INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 1 AND 17.
 INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 446 AND 454.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT SUNDAY MORNING
FOR SOUTHWESTERN IOWA AND EASTERN NEBRASKA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 AM CDT
SUNDAY MORNING FOR SOUTHWESTERN IOWA AND EASTERN NEBRASKA.

LAT...LON 4118 9571 4119 9633 4121 9636 4123 9637
      4127 9635 4131 9641 4136 9642 4137 9644
      4150 9599 4150 9562
TIME...MOT...LOC 0507Z 251DEG 40KT 4130 9632

MAYES

Local storm report, Apr 15, 12:26 AM CDT, 1 hour 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1226 AM CDT SUN APR 15 2012

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

1159 PM     HEAVY RAIN       4 W NORFOLK             42.03N 97.50W
04/14/2012  M4.08 INCH       MADISON            NE   CO-OP OBSERVER

            TOTAL RAINFALL FROM 6 AM TO 1159 PM

&&

KLISH

Local storm report, Apr 15, 12:36 AM CDT, 1 hour 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1236 AM CDT SUN APR 15 2012

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

1225 AM     TSTM WND GST     S SOUTH BEND            41.00N 96.25W
04/15/2012  E70 MPH          CASS               NE   EMERGENCY MNGR

&&

VDEWALD

Special weather statement, Apr 15, 2:05 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
Apr 14, 7:02 PM CDT	Areal Flood Advisory	OAX	Douglas, Sarpy	58 min
Apr 14, 9:17 PM CDT	Wind Advisory	OAX	Antelope, Boone, Burt, Butler, Cass, Cedar and 24 more	31 hr
Apr 14, 9:25 PM CDT	Special Weather Statement	OAX	Platte	35 min
Apr 14, 9:49 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce, Wayne	26 min
Apr 14, 10:51 PM CDT	Special Weather Statement	OAX	Cedar, Pierce	24 min
Apr 14, 11:01 PM CDT	Severe Thunderstorm Warning	OAX	Saline, Seward	29 min
Apr 14, 11:26 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Seward	34 min
Apr 14, 11:31 PM CDT	Tornado Warning	OAX	Lancaster, Seward	29 min
Apr 14, 11:52 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Lancaster, Sarpy, Saunders	38 min
Apr 15, 12:09 AM CDT	Special Weather Statement	OAX	Nemaha, Richardson	36 min
Apr 15, 12:12 AM CDT	Special Weather Statement	OAX	Douglas	33 min
Apr 15, 12:28 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Douglas, Sarpy	21 min
Apr 15, 12:41 AM CDT	Severe Thunderstorm Warning	OAX	Douglas, Sarpy	34 min
Apr 15, 10:23 AM CDT	River Flood Warning	OAX	Nemaha	11 hr
Apr 15, 10:23 AM CDT	River Flood Warning	OAX	Richardson	21 hr
Apr 15, 1:53 PM CDT	Special Weather Statement	OAX	Knox	67 min
Apr 15, 2:06 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox	54 min
Apr 15, 2:11 PM CDT	Tornado Warning	OAX	Knox	49 min
Apr 15, 2:30 PM CDT	Tornado Warning	OAX	Knox	39 min
Apr 14, 11:23 PM CDT	River Flood Warning	OAX	Page	16 hr
Apr 15, 12:57 AM CDT	Tornado Warning	OAX	Pottawattamie	15 min
Apr 15, 6:12 AM CDT	River Flood Warning	OAX	Fremont	16 hr
Apr 15, 2:14 AM CDT	Special Weather Statement	OAX	Holt	31 min

Nearby

Special Weather Statements in Nebraska, 2012 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.