Alert archive / Nebraska / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 321, NWS North Platte, NE

August 28, 2011Custer County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 28, 2011, 12:07 PM CDT for Custer County, Nebraska. It was in force for 38 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 28, 2011, 12:07 PM CDT (17:07 UTC)
Expired: Aug 28, 2011, 12:45 PM CDT
In force: 38 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Custer County, NE

The radar

The Grand Island radar (KUEX), 123 km from the middle of the area, began a volume at 17:07 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
Aug 28, 12:20 PM CDT	HAIL 1	Berwyn, NE
Aug 28, 12:38 PM CDT	TSTM WND GST 50	1 Wsw Mason City, NE
Aug 28, 12:38 PM CDT	HAIL 0.88	1 Wsw Mason City, 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, 5.1 hours before the alert went out and 103 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: 1843 J/kg
Mixed-layer CIN: -320 J/kg
Mixed-layer LCL: 1324 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

552 
WUUS53 KLBF 281707
SVRLBF
NEC041-281745-
/O.NEW.KLBF.SV.W.0321.110828T1707Z-110828T1745Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1207 PM CDT SUN AUG 28 2011

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CUSTER COUNTY IN CENTRAL NEBRASKA...

* UNTIL 1245 PM CDT

* AT 1206 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
  BERWYN...OR 5 MILES SOUTHEAST OF BROKEN BOW...AND MOVING SOUTHEAST
  AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BERWYN...WESTERVILLE...ANSLEY...MASON CITY...INTERSECTION OF
  HIGHWAY 183 AND CUMRO ROAD...HIGHWAY 92 MILE MARKER 300 AND HIGHWAY
  183 MILE MARKER 80.

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 4104 9922 4104 9955 4137 9972 4150 9947
      4123 9919 4105 9920
TIME...MOT...LOC 1706Z 315DEG 23KT 4137 9954
WIND...HAIL 60MPH 1.00IN

$$

SCHULTZ

3 follow-up statements

733 
WWUS53 KLBF 281718
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1218 PM CDT SUN AUG 28 2011

NEC041-281745-
/O.CON.KLBF.SV.W.0321.000000T0000Z-110828T1745Z/
CUSTER NE-
1218 PM CDT SUN AUG 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
CUSTER COUNTY UNTIL 1245 PM CDT...

AT 1218 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
BERWYN...OR 9 MILES SOUTHEAST OF BROKEN BOW...MOVING SOUTHEAST AT 25
MPH.

LOCATIONS IMPACTED INCLUDE...
  ANSLEY...MASON CITY...INTERSECTION OF HIGHWAY 183 AND CUMRO ROAD...
  HIGHWAY 92 MILE MARKER 300 AND HIGHWAY 183 MILE MARKER 80.

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 4104 9922 4104 9955 4137 9972 4150 9947
      4123 9919 4105 9920
TIME...MOT...LOC 1718Z 315DEG 23KT 4131 9947
WIND...HAIL 60MPH 1.00IN

$$

SCHULTZ

224 
WWUS53 KLBF 281730
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1230 PM CDT SUN AUG 28 2011

NEC041-281745-
/O.CON.KLBF.SV.W.0321.000000T0000Z-110828T1745Z/
CUSTER NE-
1230 PM CDT SUN AUG 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
CUSTER COUNTY UNTIL 1245 PM CDT...

AT 1230 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 5 MILES
SOUTH OF ANSLEY...OR 18 MILES SOUTHEAST OF BROKEN BOW...MOVING
SOUTHEAST AT 35 MPH.

THE PUBLIC REPORTED QUARTER SIZE HAIL IN BERWYN AT 1220 PM CDT.

LOCATIONS IMPACTED INCLUDE...
  MASON CITY...INTERSECTION OF HIGHWAY 183 AND CUMRO ROAD AND HIGHWAY
  183 MILE MARKER 80.

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 4104 9922 4104 9955 4128 9967 4138 9935
      4123 9919 4105 9920
TIME...MOT...LOC 1730Z 317DEG 32KT 4120 9939
WIND...HAIL 60MPH 1.00IN

$$

SCHULTZ

295 
WWUS53 KLBF 281752
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1252 PM CDT SUN AUG 28 2011

NEC041-281802-
/O.EXP.KLBF.SV.W.0321.000000T0000Z-110828T1745Z/
CUSTER NE-
1252 PM CDT SUN AUG 28 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CUSTER COUNTY HAS
EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA. HOWEVER...SMALL HAIL...GUSTY WINDS TO 50 MPH...AND VERY HEAVY 
RAINFALL REMAIN POSSIBLE SOUTH OF MASON CITY THROUGH 100 PM CDT.

LAT...LON 4104 9922 4104 9955 4128 9967 4138 9935
      4123 9919 4105 9920
TIME...MOT...LOC 1730Z 317DEG 32KT 4120 9939

$$

SCHULTZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 5:42 AM CDT	Severe Thunderstorm Warning	LBF	Keya Paha	48 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.