Alert archive / Nebraska / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 11, NWS Omaha, NE

April 11, 2005Lancaster County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Apr 11, 2005, 1:47 PM CDT for Lancaster County, Nebraska. It was in force for 28 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: Apr 11, 2005, 1:47 PM CDT (18:47 UTC)
Expired: Apr 11, 2005, 2:15 PM CDT
In force: 28 min
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

County Lancaster County, NE

The radar

The Omaha radar (KOAX), 65 km from the middle of the area, began a volume at 18:50 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
Apr 11, 11:55 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 6.8 hours before the alert went out and 65 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: 1557 m above ground
0-6 km bulk shear: 82 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 51 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 Apr 11, 11:37 AM CDT, 2 hours 10 minutes earlier.

Area forecast discussion, Apr 11, 11:37 AM CDT, 2 hours 10 minutes before

NEZ001>012-015>094-112355-

NEBRASKA GRASSLAND FIRE DANGER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1137 AM CDT MON APR 11 2005

THE GRASSLAND FIRE DANGER INDEX IS EXPECTED TO REACH THE FOLLOWING
CATEGORIES ACROSS THE STATE...

    PANHANDLE         LOW
    NORTH CENTRAL     LOW
    NORTHEAST         LOW
    SOUTHWEST         LOW
    SOUTHEAST         LOW

    PART OF STATE    HIGH TEMP      MINIMUM RH     WIND
    PANHANDLE        MID 40S        50 PERCENT     15 TO 20 MPH
    NORTH CENTRAL    LOWER 40S      70 PERCENT     15 TO 20 MPH
    NORTHEAST        LOWER 50S      70 PERCENT     10 TO 15 MPH
    SOUTHWEST        MID 40S        60 PERCENT     15 TO 20 MPH
    SOUTHEAST        NEAR 70        60 PERCENT     10 TO 15 MPH

LOW FIRE DANGER MEANS...CONTROLLED BURNS CAN BE EXECUTED WITH
REASONABLE SAFETY.

REMEMBER THAT DRIVING THROUGH OR PARKING IN AREAS WITH TALL...DRY
GRASS COULD START A FIRE.  USE EXTRA CAUTION WITH THE DISPOSAL
OF SMOKING MATERIALS.

Hazardous weather outlook, Apr 11, 9:48 AM CDT, 3 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
948 AM CDT MON APR 11 2005

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-112330-
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-
948 AM CDT MON APR 11 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PARTS OF NORTHEAST NEBRASKA.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP LATE THIS MORNING
AND CONTINUE THROUGH THE AFTERNOON HOURS. SOME OF THESE THUNDERSTORMS
ARE LIKELY TO BE SEVERE...MAINLY SOUTHEAST OF A LINE FROM DAVID CITY
TO TEKAMAH. THE MAIN THREAT FROM THESE THUNDERSTORM ARE LARGE HAIL
AND STRONG WINDS. ISOLATED TORNADOES WILL ALSO BE POSSIBLE IN AN
AREA FROM NEAR FAIRBURY TO LINCOLN TO NEBRASKA CITY AND LOCATIONS
SOUTH. THE THUNDERSTORMS ARE EXPECTED TO WEAKEN THIS EVENING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY

THERE WILL BE A CHANCE OF THUNDERSTORMS FRIDAY NIGHT AND
SATURDAY.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION MAY BE NEEDED FROM LATE THIS MORNING
THROUGH THE AFTERNOON HOURS.

BOUSTEAD

In the hours before

Local storm report, Apr 11, 10:56 AM CDT, 2 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1056 AM CDT MON APR 11 2005

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

0135 AM     HAIL             VERDIGRE                42.60N 98.04W
04/10/2005  0.88 INCH        KNOX               NE   TRAINED SPOTTER

&&

CHERMOK

Special weather statement, Apr 11, 12:11 PM CDT, 1 hour 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1211 PM CDT MON APR 11 2005

IAZ043-055-056-069-079-080-090-091-NEZ034-044-045-051>053-066>068-
078-088>093-120100-
BURT-CASS-DODGE-DOUGLAS-FREMONT IA-GAGE-HARRISON IA-JEFFERSON-
JOHNSON-LANCASTER-MILLS IA-MONONA IA-MONTGOMERY IA-NEMAHA-OTOE-
PAGE IA-PAWNEE-POTTAWATTAMIE IA-RICHARDSON-SALINE-SARPY-SAUNDERS-
SHELBY IA-WASHINGTON-
INCLUDING THE CITIES OF...AUBURN...BEATRICE...BELLEVUE...BLAIR...
CLARINDA...COUNCIL BLUFFS...CRETE...FAIRBURY...FALLS CITY...
FREMONT...GLENWOOD...HARLAN...LINCOLN...LOGAN...LOUISVILLE...
NEBRASKA CITY...OMAHA...ONAWA...PAWNEE CITY...RED OAK...SIDNEY...
TECUMSEH...TEKAMAH...WAHOO
1211 PM CDT MON APR 11 2005

...TORNADO WATCH NUMBER 151 HAS BEEN ISSUED UNTIL 8 PM CDT FOR PARTS
OF EASTERN NEBRASKA AND SOUTHWEST IOWA...

COUNTIES INCLUDED IN THE TORNADO WATCH ARE AS FOLLOWS...

IN EASTERN NEBRASKA...

BURT...CASS...DODGE...DOUGLAS...GAGE...JEFFERSON...JOHNSON...
LANCASTER...NEMAHA...OTOE...PAWNEE...RICHARDSON...SALINE...
SARPY...SAUNDERS...WASHINGTON.

IN SOUTHWEST IOWA...

FREMONT...HARRISON...MILLS...MONONA...MONTGOMERY...PAGE...
POTTAWATTAMIE...SHELBY.

DERGAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 1:59 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson, Saline	46 min
Apr 11, 2:14 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster	46 min
Apr 11, 2:39 PM CDT	Tornado Warning	OAX	Saline, Seward	36 min
Apr 11, 2:46 PM CDT	Tornado Warning	OAX	Lancaster	44 min
Apr 11, 3:12 PM CDT	Severe Thunderstorm Warning	OAX	Saunders	48 min
Apr 11, 3:15 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Seward	45 min
Apr 11, 3:56 PM CDT	Severe Thunderstorm Warning	OAX	Douglas	49 min
Apr 11, 4:09 PM CDT	Severe Thunderstorm Warning	OAX	Sarpy	37 min
Apr 11, 4:11 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	49 min
Apr 11, 4:18 PM CDT	Severe Thunderstorm Warning	OAX	Gage	42 min
Apr 11, 4:41 PM CDT	Severe Thunderstorm Warning	OAX	Cass	34 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2005 Every severe thunderstorm warning in 2005

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.