Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 166, NWS North Platte, NE

August 1, 2012Garfield County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 1, 2012, 7:38 PM CDT for Garfield County, Nebraska. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 1, 2012, 7:38 PM CDT (00:38 UTC)
Expired: Aug 1, 2012, 8:30 PM CDT
In force: 52 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Garfield County, NE

The radar

The North Platte radar (KLNX), 135 km from the middle of the area, began a volume at 00:37 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 nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.6 hours before the alert went out and 165 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: 1154 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 2681 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

023 
WUUS53 KLBF 020038
SVRLBF
NEC071-020130-
/O.NEW.KLBF.SV.W.0166.120802T0038Z-120802T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
738 PM CDT WED AUG 1 2012

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GARFIELD COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 830 PM CDT

* AT 733 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM PONY LAKE TO HORSESHOE BEND LAKE...AND MOVING EAST AT 55 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  BURWELL AROUND 755 PM CDT.

OTHER LOCATIONS IMPACTED BY THESE SEVERE THUNDERSTORMS INCLUDE
HIGHWAY 11 MILE MARKER 110...HIGHWAY 11 MILE MARKER 100 AND HIGHWAY
91 MILE MARKER 70.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE. 
THIS IS A DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A STURDY 
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4208 9877 4175 9877 4175 9921 4208 9922
TIME...MOT...LOC 0037Z 279DEG 46KT 4233 9925 4193 9940
WIND...HAIL 60MPH <.75IN

$$

ROBERG

1 follow-up statement

644 
WWUS53 KLBF 020114
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
814 PM CDT WED AUG 1 2012

NEC071-020130-
/O.CON.KLBF.SV.W.0166.000000T0000Z-120802T0130Z/
GARFIELD NE-
814 PM CDT WED AUG 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GARFIELD
COUNTY UNTIL 830 PM CDT...

AT 809 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM 8 MILES SOUTHWEST OF CHAMBERS TO BURWELL...MOVING EAST AT 45
MPH.

SEVERE THUNDERSTORMS WILL AFFECT MAINLY RURAL AREAS OF GARFIELD
COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE. 
THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A 
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4208 9877 4175 9877 4175 9921 4208 9922
TIME...MOT...LOC 0114Z 278DEG 40KT 4210 9877 4173 9901
WIND...HAIL 60MPH <.75IN

$$

ROBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 7:06 PM CDT	Severe Thunderstorm Warning	LBF	Keith	23 min
Aug 1, 7:19 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Loup	56 min
Aug 1, 7:28 PM CDT	Severe Thunderstorm Warning	LBF	Holt, Rock	62 min
Aug 1, 8:18 PM CDT	Severe Thunderstorm Warning	LBF	Lincoln	42 min
Aug 1, 8:23 PM CDT	Severe Thunderstorm Warning	LBF	Holt, Wheeler	52 min
Aug 2, 5:11 PM CDT	Severe Thunderstorm Warning	LBF	Garden	44 min
Aug 2, 5:17 PM CDT	Severe Thunderstorm Warning	LBF	Garden	43 min
Aug 2, 5:23 PM CDT	Tornado Warning	LBF	Garden	37 min
Aug 2, 5:59 PM CDT	Tornado Warning	LBF	Deuel, Garden	31 min
Aug 2, 6:29 PM CDT	Tornado Warning	LBF	Deuel, Garden	31 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2012 Every severe thunderstorm warning in 2012

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.