Alert archive / Nebraska / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 245, NWS North Platte, NE

July 11, 2010Garden County, Sheridan County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 11, 2010, 2:33 PM MDT for Garden County, Sheridan County, Nebraska. It was in force for 42 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 11, 2010, 2:33 PM MDT (20:33 UTC)
Expired: Jul 11, 2010, 3:15 PM MDT
In force: 42 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Garden County, NE, Sheridan County, NE

The radar

The North Platte radar (KLNX), 149 km from the middle of the area, began a volume at 20:33 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 11, 1:33 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.6 hours before the alert went out and 180 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: 110 J/kg
Mixed-layer CIN: -252 J/kg
Mixed-layer LCL: 1543 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -17 m²/s²
0-3 km storm-relative helicity: 39 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 North Platte, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 11, 2:51 AM MDT, 11 hours 42 minutes earlier.

Area forecast discussion, Jul 11, 2:51 AM MDT, 11 hours 42 minutes before

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Hazardous weather outlook, Jul 11, 2:31 PM MDT, 2 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORTH PLATTE NE
331 PM CDT SUN JUL 11 2010

NEZ004>010-022>029-035>038-056>059-069>071-094-122045-
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-
331 PM CDT SUN JUL 11 2010 /231 PM MDT SUN JUL 11 2010/

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

.DAY ONE...TONIGHT.

STRONG TO SEVERE THUNDERSTORM DEVELOPMENT WILL BE POSSIBLE THROUGH
MID TO LATE EVENING ACROSS MUCH OF WESTERN NEBRASKA. ONE AREA OF
STORMS SHOULD MOVE OUT OF THE WESTERN PANHANDLE INTO WEST CENTRAL
NEBRASKA WHICH SHOULD CARRY A THREAT OF LARGE HAIL AND WIND GUSTS
OVER 60 MPH. A FRONT DRIVING SOUTH INTO NORTHERN NEBRASKA MAY ALSO
BE THE FOCUS FOR THUNDERSTORM DEVELOPMENT LATER IN THE
EVENING...WITH THESE STORMS DROPPING INTO PORTIONS OF THE
SANDHILLS. THE THREAT FROM THESE STORMS WILL BE LARGE HAIL AND
DAMAGING WINDS AS WELL AS HEAVY RAINFALL THROUGH THE EARLY MORNING
HOURS AS IT TRACKS INTO SOUTHERN NEBRASKA.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

AS THE FRONT MAKES ITS WAY BACK TO THE NORTH AND EAST...
THUNDERSTORMS ARE POSSIBLE THROUGH THE DAY MONDAY AND THE RISK OF
HEAVY RAIN WILL CONTINUE...ESPECIALLY IN CENTRAL NEBRASKA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THROUGH TONIGHT.

&&

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

13

In the hours before

Local storm report, Jul 11, 8:35 AM MDT, 5 hours 58 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 10, 6:09 PM MDT	Severe Thunderstorm Warning	LBF	Brown, Cherry	51 min
Jul 10, 6:10 PM MDT	Severe Thunderstorm Warning	LBF	Custer	38 min
Jul 10, 6:11 PM MDT	Severe Thunderstorm Warning	LBF	Blaine	49 min
Jul 10, 6:18 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Logan, Thomas	42 min
Jul 10, 6:57 PM MDT	Severe Thunderstorm Warning	LBF	Boyd, Holt, Keya Paha, Rock	48 min
Jul 10, 7:21 PM MDT	Severe Thunderstorm Warning	LBF	Garfield, Wheeler	39 min
Jul 10, 7:52 PM MDT	Severe Thunderstorm Warning	LBF	Perkins	38 min
Jul 10, 7:55 PM MDT	Severe Thunderstorm Warning	LBF	Holt, Wheeler	35 min
Jul 10, 8:41 PM MDT	Severe Thunderstorm Warning	LBF	Custer	34 min
Jul 10, 9:06 PM MDT	Severe Thunderstorm Warning	LBF	Custer	54 min
Jul 10, 10:45 PM MDT	Areal Flood Advisory	LBF	Custer	9 hr
Jul 10, 10:52 PM MDT	Areal Flood Advisory	LBF	Custer	12 hr
Jul 11, 3:12 PM MDT	Severe Thunderstorm Warning	LBF	Garden, Grant, Sheridan	48 min
Jul 11, 3:58 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Garden, Keith	47 min
Jul 11, 4:42 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Keith, McPherson	48 min
Jul 11, 5:00 PM MDT	Severe Thunderstorm Warning	LBF	Logan	45 min
Jul 11, 5:12 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln, Logan, McPherson	63 min
Jul 11, 5:15 PM MDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln, McPherson	45 min
Jul 11, 5:27 PM MDT	Severe Thunderstorm Warning	LBF	Holt, Rock	48 min
Jul 11, 5:42 PM MDT	Severe Thunderstorm Warning	LBF	Brown, Rock	48 min
Jul 11, 5:42 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Lincoln, Logan, Thomas	48 min
Jul 11, 5:47 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	43 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2010 Every severe thunderstorm warning in 2010

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.