Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 176, NWS North Platte, NE

August 3, 2012Brown County, Rock County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 3, 2012, 6:40 PM CDT for Brown County, Rock County, Nebraska. It was in force for 65 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 3, 2012, 6:40 PM CDT (23:40 UTC)
Expired
Aug 3, 2012, 7:45 PM CDT
In force
65 min
Issued by
NWS North Platte, NE
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Brown County, NE, Rock County, NE

The radar

The North Platte radar (KLNX), 113 km from the middle of the area, began a volume at 23:41 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.

What was reported inside it

TimeReportWhereRemark
Aug 3, 7:40 PM CDTHAIL 1.75Long Pine, NESOME WINDOWS CRACKED FROM THE HAIL.
Aug 3, 7:50 PM CDTHAIL 0.7510 S Ainsworth, NEALSO RECORDED 1.30 INCHES OF RAINFALL
Aug 3, 7:55 PM CDTHAIL 16 Se Long Pine, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.7 hours before the alert went out and 192 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 12:00Z on 2012-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 783 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 12:00Z on 2012-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
783 J/kg
Mixed-layer CIN
-289 J/kg
Mixed-layer LCL
1209 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
-10 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

522 
WUUS53 KLBF 032340
SVRLBF
NEC017-149-040045-
/O.NEW.KLBF.SV.W.0176.120803T2340Z-120804T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
640 PM CDT FRI AUG 3 2012

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BROWN COUNTY IN NORTH CENTRAL NEBRASKA...
  NORTHERN ROCK COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 745 PM CDT

* AT 637 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  KELLER PARK STATE RECREATION AREA...OR 8 MILES NORTH OF
  AINSWORTH...AND MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  KELLER PARK STATE RECREATION AREA AROUND 645 PM CDT.
  BASSETT AROUND 715 PM CDT.
  NEWPORT AROUND 740 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4278 9924 4246 9925 4237 10016 4259 10019
      4272 10017 4277 9986 4275 9986 4274 9978
      4273 9964 4272 9954 4278 9938 4278 9934
      4280 9926
TIME...MOT...LOC 2340Z 274DEG 22KT 4267 9982
WIND...HAIL 60MPH 1.00IN

$$

ROBERG
1 follow-up statement
802 
WWUS53 KLBF 040010
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
710 PM CDT FRI AUG 3 2012

NEC017-149-040045-
/O.CON.KLBF.SV.W.0176.000000T0000Z-120804T0045Z/
BROWN NE-ROCK NE-
710 PM CDT FRI AUG 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN ROCK
AND NORTHERN BROWN COUNTIES UNTIL 745 PM CDT...

AT 704 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 12 MILES SOUTHEAST OF MILLS TO
AINSWORTH...MOVING EAST AT 20 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  LONG PINE AROUND 725 PM CDT.
  BASSETT AROUND 740 PM CDT.
  NEWPORT AROUND 745 PM CDT.

OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS INCLUDE HIGHWAY 137
MILE MARKER 10.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4278 9924 4246 9925 4237 10016 4259 10019
      4272 10017 4277 9986 4275 9986 4274 9978
      4273 9964 4272 9954 4278 9938 4278 9934
      4280 9926
TIME...MOT...LOC 0010Z 277DEG 17KT 4278 9927 4258 9978
WIND...HAIL 60MPH 1.00IN

$$

ROBERG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 7:00 PM CDTTornado WarningLBFDeuel30 min
Aug 2, 7:27 PM CDTSevere Thunderstorm WarningLBFDeuel, Keith, Perkins30 min
Aug 2, 7:40 PM CDTTornado WarningLBFDeuel, Perkins25 min
Aug 2, 7:55 PM CDTSevere Thunderstorm WarningLBFPerkins49 min
Aug 2, 8:04 PM CDTTornado WarningLBFPerkins26 min
Aug 2, 8:30 PM CDTSevere Thunderstorm WarningLBFChase, Perkins45 min
Aug 3, 1:19 AM CDTSevere Thunderstorm WarningLBFBoyd, Brown, Holt, Keya Paha, Rock56 min
Aug 3, 5:53 PM CDTSevere Thunderstorm WarningLBFBoyd, Keya Paha67 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2012Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.