Alert archive / Nebraska / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 95, NWS Omaha, NE

June 6, 2015Antelope County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 6, 2015, 6:28 PM CDT for Antelope County, Nebraska. It was in force for 32 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: Jun 6, 2015, 6:28 PM CDT (23:28 UTC)
Expired: Jun 6, 2015, 7:00 PM CDT
In force: 32 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Antelope County, NE

The radar

The Omaha radar (KOAX), 170 km from the middle of the area, began a volume at 23:28 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
Jun 6, 3:40 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.5 hours before the alert went out and 170 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: 4 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 1210 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 87 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 Jun 6, 3:40 PM CDT, 2 hours 48 minutes earlier.

Area forecast discussion, Jun 6, 3:40 PM CDT, 2 hours 48 minutes before

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Hazardous weather outlook, Jun 6, 4:39 PM CDT, 1 hour 49 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
439 PM CDT SAT JUN 6 2015

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-071145-
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-
439 PM CDT SAT JUN 6 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

THERE IS A RISK FOR TORNADOES ACROSS NORTHEAST NEBRASKA EARLY THIS
EVENING...GENERALLY NORTH OF HIGHWAY 20. THERE IS ALSO A RISK OF
LARGE HAIL...DAMAGING WIND AND FLASH FLOODING ACROSS A GOOD
PORTION OF NORTHEAST NEBRASKA AND SOUTHWEST IOWA INTO THE EARLY
MORNING HOURS AS A LARGE COMPLEX OF THUNDERSTORMS SHIFTS
SOUTHEAST.

A TORNADO WATCH IS IN EFFECT FOR MUCH OF NORTHEAST NEBRASKA UNTIL
9 PM AND A FLASH FLOOD WATCH IS IN EFFECT FOR PORTIONS OF
NORTHEAST NEBRASKA AND WEST CENTRAL IOWA THROUGH THE EARLY MORNING
HOURS.

.DAYS TWO THROUGH SEVEN...SUNDAY NIGHT THROUGH SATURDAY

THERE IS A CHANCE OF THUNDERSTORMS SUNDAY ACROSS SOUTHEAST
NEBRASKA AND SOUTHWEST IOWA. STORM CHANCES RETURN TO THE AREA LATE
IN THE WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED ACROSS NORTHEAST NEBRASKA THIS
EVENING.

In the hours before

Special weather statement, Jun 6, 12:49 PM CDT, 5 hours 39 minutes before

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Special weather statement, Jun 6, 1:33 PM CDT, 4 hours 55 minutes before

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Local storm report, Jun 6, 1:50 PM CDT, 4 hours 38 minutes before

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Special weather statement, Jun 6, 5:40 PM CDT, 48 minutes before

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Special weather statement, Jun 6, 6:19 PM CDT, 9 minutes before

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Special weather statement, Jun 6, 6:23 PM CDT, 5 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
Jun 6, 12:33 AM CDT	Special Weather Statement	OAX	Jefferson	57 min
Jun 6, 3:21 AM CDT	Areal Flood Advisory	OAX	Gage, Jefferson, Pawnee	5 hr
Jun 6, 8:30 AM CDT	Special Weather Statement	OAX	Colfax	60 min
Jun 6, 8:51 AM CDT	Special Weather Statement	OAX	Platte	39 min
Jun 6, 9:40 AM CDT	Special Weather Statement	OAX	Madison	50 min
Jun 6, 10:48 AM CDT	Special Weather Statement	OAX	Cuming	42 min
Jun 6, 11:57 AM CDT	Special Weather Statement	OAX	Burt	48 min
Jun 6, 3:53 PM CDT	Flash Flood Watch	OAX	Burt, Cedar, Cuming, Stanton, Thurston, Wayne	10 hr
Jun 6, 5:40 PM CDT	Special Weather Statement	OAX	Knox	50 min
Jun 6, 5:53 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox	37 min
Jun 6, 6:19 PM CDT	Special Weather Statement	OAX	Antelope, Madison	26 min
Jun 6, 6:23 PM CDT	Special Weather Statement	OAX	Cedar	52 min
Jun 6, 6:30 PM CDT	Severe Thunderstorm Warning	OAX	Knox	30 min
Jun 6, 6:59 PM CDT	Severe Thunderstorm Warning	OAX	Knox	36 min
Jun 6, 12:49 PM CDT	Special Weather Statement	OAX	Monona	41 min
Jun 6, 1:33 PM CDT	Special Weather Statement	OAX	Monona	42 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2015 Every severe thunderstorm warning 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.