Alert archive / Nebraska / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 98, NWS North Platte, NE

June 19, 2011Boyd County, Holt County, Rock County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 19, 2011, 6:22 PM CDT for Boyd County, Holt County, Rock 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: Jun 19, 2011, 6:22 PM CDT (23:22 UTC)
Expired: Jun 19, 2011, 7:00 PM CDT
In force: 38 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 2.5 in
Wind: 60.0 mph

Counties Boyd County, NE, Holt County, NE, Rock County, NE

The radar

The North Platte radar (KLNX), 151 km from the middle of the area, began a volume at 23:23 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
Jun 19, 6:36 PM CDT	HAIL 1.75	5 Nne Stuart, NE
Jun 19, 6:38 PM CDT	HAIL 1.75	6 N Stuart, NE
Jun 19, 7:06 PM CDT	HAIL 1	12 N Atkinson, NE	PUBLIC REPORTED A FEW HAIL STONES THE SIZE OF A QUARTER...BUT MOST WERE THE SIZE OF A LARGE MARBLE.

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
Jun 19, 6:10 PM CDT	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 221 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: 324 J/kg
Mixed-layer CIN: -277 J/kg
Mixed-layer LCL: 1660 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: -18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

317 
WUUS53 KLBF 192322
SVRLBF
NEC015-089-149-200000-
/O.NEW.KLBF.SV.W.0098.110619T2322Z-110620T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
622 PM CDT SUN JUN 19 2011

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL BOYD COUNTY IN NORTH CENTRAL NEBRASKA...
  NORTHWESTERN HOLT COUNTY IN NORTH CENTRAL NEBRASKA...
  NORTHEASTERN ROCK COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 700 PM CDT

* AT 619 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DESTRUCTIVE HAIL UP
  TO TENNIS BALL SIZE...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS
  STORM WAS LOCATED NEAR STUART...OR 19 MILES EAST OF                
  BASSETT...AND   MOVING NORTHEAST AT 15 MPH.  THIS WARNING REPLACES 
  THE PREVIOUS SEVERE THUNDERSTORM WARNING FOR THE SAME AREA.

* LOCATIONS IMPACTED INCLUDE...
  HIGHWAY 11 MILE MARKER 160 AND HIGHWAY 11 MILE MARKER 170.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR LARGE DESTRUCTIVE HAIL CAPABLE OF PRODUCING
SIGNIFICANT DAMAGE. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

&&

LAT...LON 4276 9867 4257 9910 4265 9933 4280 9929
      4280 9926 4289 9926 4297 9924
TIME...MOT...LOC 2321Z 216DEG 14KT 4266 9917
WIND...HAIL 60MPH 2.50IN

$$

JACOBS

1 follow-up statement

217 
WWUS53 KLBF 192343
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
643 PM CDT SUN JUN 19 2011

NEC015-089-149-200000-
/O.CON.KLBF.SV.W.0098.000000T0000Z-110620T0000Z/
BOYD NE-HOLT NE-ROCK NE-
643 PM CDT SUN JUN 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
ROCK...NORTHWESTERN HOLT AND WEST CENTRAL BOYD COUNTIES UNTIL 700 PM
CDT...

AT 642 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES
NORTH OF STUART...OR 23 MILES SOUTHWEST OF SPENCER...MOVING NORTHEAST
AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  HIGHWAY 11 MILE MARKER 170.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR LARGE DESTRUCTIVE HAIL CAPABLE OF PRODUCING
SIGNIFICANT DAMAGE. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

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

&&

LAT...LON 4276 9867 4257 9910 4265 9933 4280 9929
      4280 9926 4289 9926 4297 9924
TIME...MOT...LOC 2343Z 216DEG 14KT 4273 9910
WIND...HAIL 60MPH 1.75IN

$$

JACOBS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 5:22 PM CDT	Severe Thunderstorm Warning	LBF	Holt, Keya Paha, Rock	38 min
Jun 19, 5:57 PM CDT	Severe Thunderstorm Warning	LBF	Boyd, Holt, Keya Paha, Rock	33 min
Jun 19, 6:15 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Lincoln, Logan	45 min
Jun 19, 6:31 PM CDT	Tornado Warning	LBF	Lincoln, Logan	29 min
Jun 19, 6:34 PM CDT	Severe Thunderstorm Warning	LBF	Hayes	41 min
Jun 19, 6:54 PM CDT	Severe Thunderstorm Warning	LBF	Boyd, Holt	26 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.