Alert archive / Nebraska / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 190, NWS North Platte, NE

August 7, 2012Chase County, Hayes County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 7, 2012, 5:00 PM MDT for Chase County, Hayes County, Nebraska. It was in force for 25 min. 2 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 7, 2012, 5:00 PM MDT (23:00 UTC)
Expired: Aug 7, 2012, 5:25 PM MDT
In force: 25 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Chase County, NE, Hayes County, NE

The radar

The Goodland radar (KGLD), 121 km from the middle of the area, began a volume at 23:03 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

Time	Report	Where	Remark
Aug 7, 5:00 PM MDT	TSTM WND DMG	Imperial, NE	POWER POLE BROKEN IN HALF IN IMPERIAL. POWER OUTAGE CONTINUES FOR THE CITY OF IMPERIAL. POWER WAS ALSO KNOCKED OUT AT THE AUTOMATED SURFACE OBSERVING STATION AT THE IMPERIAL AIRPORT.
Aug 7, 5:05 PM MDT	TSTM WND GST 60	Imperial, NE	ESTIMATED 50 TO 60 MPH WIND GUSTS AS THUNDERSTORM PASSED THROUGH IMPERIAL.

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, 11.0 hours before the alert went out and 109 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: 709 J/kg
Mixed-layer CIN: -394 J/kg
Mixed-layer LCL: 1831 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 37 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.

103 
WUUS53 KLBF 072300
SVRLBF
NEC029-085-080000-
/O.NEW.KLBF.SV.W.0190.120807T2300Z-120808T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
500 PM MDT TUE AUG 7 2012

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CHASE COUNTY IN SOUTHWEST NEBRASKA...
  SOUTHWESTERN HAYES COUNTY IN SOUTHWEST NEBRASKA...

* UNTIL 600 PM MDT/700 PM CDT/

* AT 455 PM MDT...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
  IMPERIAL...AND MOVING SOUTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ENDERS RESERVOIR STATE RECREATION AREA...ENDERS...WAUNETA AND
  HAMLET.

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.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY. LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

THIS WARNING REPLACES THE PREVIOUS SEVERE THUNDERSTORM WARNING FOR 
CHASE AND SOUTHWESTERN PERKINS COUNTY.

&&

LAT...LON 4048 10189 4065 10158 4037 10099 4034 10108
      4034 10175
TIME...MOT...LOC 2259Z 315DEG 30KT 4048 10161
WIND...HAIL 60MPH 1.00IN

$$

BUTTLER

1 follow-up statement

966 
WWUS53 KLBF 072325
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
625 PM CDT TUE AUG 7 2012

NEC029-085-072334-
/O.CAN.KLBF.SV.W.0190.000000T0000Z-120808T0000Z/
CHASE NE-HAYES NE-
525 PM MDT TUE AUG 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN HAYES AND
SOUTHEASTERN CHASE COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
 HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN NORTH PLATTE.

LAT...LON 4048 10189 4065 10158 4037 10099 4034 10108
      4034 10175
TIME...MOT...LOC 2324Z 315DEG 30KT 4033 10142

$$

BUTTLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 6:05 PM MDT	Severe Thunderstorm Warning	LBF	Rock	26 min
Aug 6, 7:39 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln, McPherson	51 min
Aug 6, 7:47 PM MDT	Severe Thunderstorm Warning	LBF	Loup, Rock	43 min
Aug 7, 4:19 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	56 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.