Alert archive / Nebraska / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 220, NWS North Platte, NE

July 3, 20094 counties in Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 3, 2009, 5:07 PM MDT for 4 counties in Nebraska. It was in force for 23 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: Jul 3, 2009, 5:07 PM MDT (23:07 UTC)
Expired: Jul 3, 2009, 5:30 PM MDT
In force: 23 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon

Counties Hooker County, NE, Logan County, NE, McPherson County, NE, Thomas County, NE

The radar

The North Platte radar (KLNX), 31 km from the middle of the area, began a volume at 23:10 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
Jul 3, 2:48 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 3, 3:54 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.1 hours before the alert went out and 70 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: 208 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 796 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 North Platte, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 3, 4:01 PM MDT, 1 hour 6 minutes earlier.

Area forecast discussion, Jul 3, 4:01 PM MDT, 1 hour 6 minutes before

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Hazardous weather outlook, Jul 3, 2:04 PM MDT, 3 hours 3 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORTH PLATTE NE
304 PM CDT FRI JUL 3 2009

NEZ004>010-022>029-035>038-056>059-069>071-094-041000-
SHERIDAN-EASTERN CHERRY-KEYA PAHA-BOYD-BROWN-ROCK-HOLT-GARDEN-
GRANT-HOOKER-THOMAS-BLAINE-LOUP-GARFIELD-WHEELER-ARTHUR-MCPHERSON-
LOGAN-CUSTER-DEUEL-KEITH-PERKINS-LINCOLN-CHASE-HAYES-FRONTIER-
WESTERN CHERRY-
304 PM CDT FRI JUL 3 2009 /204 PM MDT FRI JUL 3 2009/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN AND
NORTH CENTRAL NEBRASKA.

.DAY ONE...TONIGHT.

THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS ACROSS SOUTHERN
NEBRASKA TONIGHT. ISOLATED STORMS COULD ALSO REACH SEVERE LIMITS
ACROSS THE WEST THIS EVENING AS A STRONG UPPER LEVEL DISTURBANCE
MOVES EAST. THE GREATEST RISK FOR SEVERE THUNDERSTORM DEVELOPMENT
WILL BE SOUTH OF A LINE FROM CHAPPELL IN DEUEL COUNTY TO ANSELMO
IN CUSTER COUNTY. THE PRIMARY SEVERE THREAT THIS EVENING WITH BE
DAMAGING WINDS ALTHOUGH ISOLATED LARGE HAIL IS STILL POSSIBLE.
DEEP MOISTURE IS IN PLACE WHERE SLOW MOVING THUNDERSTORMS COULD
ALSO PRODUCE HEAVY RAINFALL THIS EVENING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

AN ACTIVE WEATHER PATTERN WILL CONTINUE THROUGH MONDAY WITH
SCATTERED SHOWERS AND THUNDERSTORMS POSSIBLE EACH DAY. AFTER
MONDAY...HOTTER AND DRIER CONDITIONS WILL MOVE INTO WESTERN AND
NORTH CENTRAL NEBRASKA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING SOUTH
OF A LINE FROM BARTLETT IN WHEELER COUNTY...TO THEDFORD IN THOMAS
COUNTY...AND TO CHAPPELL IN DEUEL COUNTY.

&&

THIS PRODUCT IS NOW AVAILABLE...ALONG WITH OTHER WEATHER...
HYDROLOGICAL AND CLIMATOLOGICAL INFORMATION...AT
HTTP://WWW.WEATHER.GOV/NORTHPLATTE

KECK

In the hours before

Local storm report, Jul 3, 2:56 PM MDT, 2 hours 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
356 PM CDT FRI JUL 03 2009

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

0340 PM     HAIL             4 SE ANTIOCH            42.03N 102.56W
07/03/2009  E1.75 INCH       SHERIDAN           NE   PUBLIC

            HAIL UP TO THE SIZE OF GOLF BALLS LASTED FOR 10 OR MORE
            MINUTES. THE HAIL WAS ACCOMPANIED BY STRONG WINDS OF AN
            UNKNOWN MAGNITUDE.

&&

CJS

Local storm report, Jul 3, 3:26 PM MDT, 1 hour 41 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 6:30 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	30 min
Jul 3, 2:21 PM MDT	Severe Thunderstorm Warning	LBF	Garden, Sheridan	39 min
Jul 3, 2:57 PM MDT	Severe Thunderstorm Warning	LBF	Garden, Sheridan	48 min
Jul 3, 3:00 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Garden	45 min
Jul 3, 3:11 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Grant, Sheridan	33 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2009 Every severe thunderstorm warning in 2009

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.