Alert archive / Nebraska / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 49, NWS Omaha, NE

May 19, 2013Lancaster County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at May 19, 2013, 4:05 PM CDT for Lancaster County, Nebraska. It was in force for 25 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: May 19, 2013, 4:05 PM CDT (21:05 UTC)
Expired: May 19, 2013, 4:30 PM CDT
In force: 25 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Lancaster County, NE

The radar

The Omaha radar (KOAX), 65 km from the middle of the area, began a volume at 21:06 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 19, 1:47 PM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 9.1 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: 1125 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 80 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 May 19, 3:42 PM CDT, 23 minutes earlier.

Area forecast discussion, May 19, 3:42 PM CDT, 23 minutes before

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Hazardous weather outlook, May 19, 3:11 PM CDT, 54 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
311 PM CDT SUN MAY 19 2013

NEZ011-012-015>018-030>034-042>045-050>053-200300-
KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-BOONE-MADISON-STANTON-
CUMING-BURT-PLATTE-COLFAX-DODGE-WASHINGTON-BUTLER-SAUNDERS-
DOUGLAS-SARPY-
311 PM CDT SUN MAY 19 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL
NEBRASKA AND NORTHEAST NEBRASKA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE MOVING ACROSS
THE OUTLOOK AREA THROUGH THIS EVENING. THUNDERSTORMS THOUGH SHOULD
BECOME ISOLATED IN NATURE AFTER MIDNIGHT

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

WITH THE UPPER LEVEL SYSTEM CLOSING OFF AND STALLING OVER THE
PLAINS...ISOLATED THUNDERSTORMS REMAIN POSSIBLE MONDAY THROUGH
WEDNESDAY...MAINLY WITH AFTERNOON HEATING.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT.

IAZ043-055-056-069-079-080-090-091-NEZ065>068-078-088>093-200300-
MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-
PAGE-SEWARD-LANCASTER-CASS-OTOE-SALINE-JEFFERSON-GAGE-JOHNSON-
NEMAHA-PAWNEE-RICHARDSON-
311 PM CDT SUN MAY 19 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

TORNADO WATCH IS IN EFFECT THROUGH THIS EVENING.

SEVERE THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WINDS ARE
POSSIBLE MAINLY ACROSS SOUTHEAST NEBRASKA AND SOUTHWEST IOWA
THROUGH THIS EVENING. SOME STORMS MAY PRODUCE ISOLATED TORNADOS
DURING THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

WITH THE UPPER LEVEL SYSTEM CLOSING OFF AND STALLING OVER THE
PLAINS...ISOLATED THUNDERSTORMS REMAIN POSSIBLE MONDAY THROUGH
WEDNESDAY...MAINLY WITH AFTERNOON HEATING.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTER ACTIVATION MAY BE REQUIRED LATE THIS AFTERNOON AND
EVENING.

In the hours before

Local storm report, May 19, 2:29 PM CDT, 1 hour 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
229 PM CDT SUN MAY 19 2013

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

0210 PM     HAIL             LIBERTY                 40.08N 96.48W
05/19/2013  M1.00 INCH       GAGE               NE   TRAINED SPOTTER

            MOSTLY NICKEL BUT A FEW QUARTER-SIZE.

&&

CHERMOK

Local storm report, May 19, 3:35 PM CDT, 30 minutes before

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Local storm report, May 19, 3:47 PM CDT, 18 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
May 18, 9:31 PM CDT	Special Weather Statement	OAX	Butler, Seward	29 min
May 18, 10:05 PM CDT	Special Weather Statement	OAX	Butler, Lancaster, Saunders, Seward	25 min
May 18, 10:08 PM CDT	Special Weather Statement	OAX	Antelope, Colfax, Madison, Pierce, Platte, Stanton and 1 more	37 min
May 18, 10:11 PM CDT	Special Weather Statement	OAX	Antelope	49 min
May 18, 10:38 PM CDT	Special Weather Statement	OAX	Knox, Pierce	52 min
May 18, 11:03 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	42 min
May 18, 11:38 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Lancaster, Saline	52 min
May 18, 11:42 PM CDT	Special Weather Statement	OAX	Gage, Johnson, Nemaha, Pawnee, Richardson	33 min
May 18, 11:50 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Nemaha, Pawnee, Richardson	25 min
May 19, 12:15 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Johnson, Lancaster, Nemaha, Otoe, Richardson	45 min
May 19, 12:24 AM CDT	Special Weather Statement	OAX	Douglas, Washington	36 min
May 19, 12:54 AM CDT	Special Weather Statement	OAX	Cass, Sarpy	51 min
May 19, 2:08 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Pawnee	37 min
May 19, 2:43 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Otoe, Pawnee	32 min
May 19, 3:14 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Sarpy	31 min
May 19, 3:17 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Nemaha, Otoe	28 min
May 19, 3:46 PM CDT	Severe Thunderstorm Warning	OAX	Sarpy	44 min
May 19, 3:48 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Pawnee, Richardson	27 min
May 19, 4:14 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Pawnee, Richardson	46 min
May 19, 5:06 PM CDT	Special Weather Statement	OAX	Antelope, Boone, Madison, Pierce, Platte	54 min
May 19, 5:21 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone	24 min
May 19, 5:23 PM CDT	Special Weather Statement	OAX	Johnson, Nemaha, Pawnee	67 min
May 19, 6:01 PM CDT	Special Weather Statement	OAX	Platte	44 min
May 19, 6:51 PM CDT	Severe Thunderstorm Warning	OAX	Platte	24 min
May 19, 6:53 PM CDT	Special Weather Statement	OAX	Knox, Madison, Pierce	37 min
May 19, 1:03 AM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Page, Pottawattamie, Shelby	27 min
May 19, 4:17 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona, Pottawattamie, Shelby	28 min
May 19, 4:25 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Page	50 min
May 19, 5:12 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Montgomery, Page	48 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2013 Every severe thunderstorm warning in 2013

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.