Alert archive / Nebraska / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 271, NWS North Platte, NE

August 9, 2011Chase County, Hayes County, Perkins County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 9, 2011, 5:24 PM MDT for Chase County, Hayes County, Perkins County, Nebraska. It was in force for 51 min. 4 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 9, 2011, 5:24 PM MDT (23:24 UTC)
Expired: Aug 9, 2011, 6:15 PM MDT
In force: 51 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Chase County, NE, Hayes County, NE, Perkins County, NE

The radar

The North Platte radar (KLNX), 152 km from the middle of the area, began a volume at 23:25 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 9, 5:41 PM MDT	HAIL 1	7 Se Madrid, NE	PUBLIC REPORTED QUARTER SIZED HAIL 7 MILES SOUTHEAST OF MADRID.
Aug 9, 5:45 PM MDT	HAIL 1	6 S Elsie, NE
Aug 9, 6:00 PM MDT	HAIL 1.75	10 Sse Grant, NE	COVERED THE GROUND.
Aug 9, 6:16 PM MDT	HAIL 1.25	10 N Imperial, NE	PUBLIC REPORTED HALF-DOLLAR SIZED HAIL 10 MILES NORTH OF IMPERIAL.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 9, 1:51 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.4 hours before the alert went out and 88 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: 98 J/kg
Mixed-layer CIN: -357 J/kg
Mixed-layer LCL: 1507 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 68 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.

443 
WUUS53 KLBF 092324
SVRLBF
NEC029-085-135-100015-
/O.NEW.KLBF.SV.W.0271.110809T2324Z-110810T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
524 PM MDT TUE AUG 9 2011

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN CHASE COUNTY IN SOUTHWEST NEBRASKA...
  NORTHWESTERN HAYES COUNTY IN SOUTHWEST NEBRASKA...
  PERKINS COUNTY IN SOUTHWEST NEBRASKA...

* UNTIL 615 PM MDT/715 PM CDT/

* AT 521 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR MADRID...OR 10 MILES EAST OF GRANT...AND
  MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ELSIE AROUND 535 PM MDT.
  GRAINTON AROUND 545 PM MDT.

LAT...LON 4089 10126 4061 10125 4060 10151 4078 10201
      4090 10202 4095 10155
TIME...MOT...LOC 2324Z 281DEG 29KT 4083 10151
WIND...HAIL <50MPH 1.00IN

$$

ROBERG

3 follow-up statements

424 
WWUS53 KLBF 092338
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
538 PM MDT TUE AUG 9 2011

NEC029-085-135-100015-
/O.CON.KLBF.SV.W.0271.000000T0000Z-110810T0015Z/
CHASE NE-HAYES NE-PERKINS NE-
538 PM MDT TUE AUG 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR PERKINS...
NORTHWESTERN HAYES AND NORTHEASTERN CHASE COUNTIES UNTIL 615 PM
MDT/715 PM CDT/...

AT 535 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED 7 MILES SOUTHWEST OF ELSIE...OR 15 MILES SOUTHEAST
OF GRANT...MOVING SOUTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
NORTHEASTERN CHASE...NORTHWESTERN HAYES AND PERKINS COUNTIES.

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 4089 10126 4061 10125 4060 10151 4078 10201
      4090 10198 4095 10155
TIME...MOT...LOC 2338Z 295DEG 26KT 4075 10144
WIND...HAIL <50MPH 1.00IN

$$

ROBERG

866 
WWUS53 KLBF 092351
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
551 PM MDT TUE AUG 9 2011

NEC029-085-135-100015-
/O.CON.KLBF.SV.W.0271.000000T0000Z-110810T0015Z/
CHASE NE-HAYES NE-PERKINS NE-
551 PM MDT TUE AUG 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
PERKINS...NORTHWESTERN HAYES AND NORTHEASTERN CHASE COUNTIES UNTIL
615 PM MDT/715 PM CDT/...

AT 548 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL.  THIS
STORM WAS LOCATED 7 MILES SOUTH OF GRANT...MOVING EAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
NORTHEASTERN CHASE...NORTHWESTERN HAYES AND SOUTHEASTERN PERKINS
COUNTIES...INCLUDING THE FOLLOWING LOCATIONS HIGHWAY 61 MILE MARKER
50.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4088 10177 4095 10155 4089 10126 4061 10125
      4060 10151 4074 10190
TIME...MOT...LOC 2351Z 292DEG 32KT 4074 10174
WIND...HAIL <50MPH 1.75IN

$$

ROBERG

989 
WWUS53 KLBF 092356
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
556 PM MDT TUE AUG 9 2011

NEC029-085-135-100015-
/O.CON.KLBF.SV.W.0271.000000T0000Z-110810T0015Z/
CHASE NE-HAYES NE-PERKINS NE-
556 PM MDT TUE AUG 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
PERKINS...NORTHWESTERN HAYES AND NORTHEASTERN CHASE COUNTIES UNTIL
615 PM MDT/715 PM CDT/...

AT 553 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DESTRUCTIVE HAIL UP TO
TENNIS BALL SIZE.  THIS STORM WAS LOCATED 8 MILES SOUTH OF GRANT...
MOVING EAST AT 35 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
NORTHEASTERN CHASE...NORTHWESTERN HAYES AND SOUTHEASTERN PERKINS
COUNTIES...INCLUDING THE FOLLOWING LOCATIONS HIGHWAY 61 MILE MARKER
50.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4088 10177 4095 10155 4089 10126 4061 10125
      4060 10151 4074 10190
TIME...MOT...LOC 2356Z 292DEG 32KT 4072 10169
WIND...HAIL <50MPH 2.50IN

$$

ROBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 12:44 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Keith	46 min
Aug 9, 1:14 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Keith, Lincoln	46 min
Aug 9, 1:32 PM MDT	Tornado Warning	LBF	Keith, Lincoln	28 min
Aug 9, 2:01 PM MDT	Severe Thunderstorm Warning	LBF	Hayes, Lincoln, Perkins	44 min
Aug 9, 2:14 PM MDT	Tornado Warning	LBF	Hayes, Lincoln	31 min
Aug 9, 2:43 PM MDT	Severe Thunderstorm Warning	LBF	Deuel	47 min
Aug 9, 2:44 PM MDT	Tornado Warning	LBF	Frontier, Hayes	31 min
Aug 9, 3:16 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes	29 min
Aug 9, 3:30 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	45 min
Aug 9, 3:56 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	49 min
Aug 9, 4:36 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Hayes	28 min
Aug 9, 4:50 PM MDT	Severe Thunderstorm Warning	LBF	Perkins	55 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2011 Every severe thunderstorm warning in 2011

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.