Alert archive / Nebraska / Tornado Warnings in 2011

Tornado Warning 53, NWS North Platte, NE

August 17, 2011Cherry County, Hooker County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 17, 2011, 6:07 PM MDT for Cherry County, Hooker County, Nebraska. It was in force for 38 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 17, 2011, 6:07 PM MDT (00:07 UTC)
Expired: Aug 17, 2011, 6:45 PM MDT
In force: 38 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon

Counties Cherry County, NE, Hooker County, NE

The radar

The North Platte radar (KLNX), 51 km from the middle of the area, began a volume at 00:07 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	Remark
Aug 17, 6:15 PM MDT	FUNNEL CLOUD	15 Wnw Mullen, NE
Aug 17, 6:39 PM MDT	HAIL 1.75	5 W Mullen, NE

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 17, 2:37 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.1 hours before the alert went out and 119 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: 1270 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 1399 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

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

130 
WFUS53 KLBF 180007
TORLBF
NEC031-091-180045-
/O.NEW.KLBF.TO.W.0053.110818T0007Z-110818T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
607 PM MDT WED AUG 17 2011

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL CHERRY COUNTY IN NORTH CENTRAL NEBRASKA...
  NORTHERN HOOKER COUNTY IN WEST CENTRAL NEBRASKA...

* UNTIL 645 PM MDT

* AT 602 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 8 MILES EAST OF WHITMAN ROAD CROSSING THE NORTH
  BRANCH OF THE MIDDLE LOUP RIVER...OR 19 MILES NORTHWEST OF
  MULLEN...AND MOVING SOUTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MULLEN AND HIGHWAY 2 MILE MARKER 170.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4208 10085 4193 10129 4219 10152 4232 10127
TIME...MOT...LOC 0008Z 320DEG 23KT 4216 10133

$$

SPRINGER

1 follow-up statement

805 
WWUS53 KLBF 180030
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
630 PM MDT WED AUG 17 2011

NEC031-091-180045-
/O.CON.KLBF.TO.W.0053.000000T0000Z-110818T0045Z/
HOOKER NE-CHERRY NE-
630 PM MDT WED AUG 17 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL CHERRY AND
NORTHERN HOOKER COUNTIES UNTIL 645 PM MDT...

AT 625 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 10 MILES NORTHEAST OF CARR LAKE...OR 13 MILES WEST
OF MULLEN...MOVING SOUTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  MULLEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4208 10085 4193 10129 4219 10152 4232 10127
TIME...MOT...LOC 0030Z 334DEG 22KT 4205 10128

$$

SPRINGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 6:36 PM MDT	Severe Thunderstorm Warning	LBF	Chase	39 min
Aug 17, 6:44 PM MDT	Tornado Warning	LBF	Hooker	46 min
Aug 17, 7:13 PM MDT	Severe Thunderstorm Warning	LBF	Hooker, McPherson	62 min
Aug 17, 8:10 PM MDT	Tornado Warning	LBF	Brown, Cherry, Keya Paha	35 min
Aug 17, 8:44 PM MDT	Tornado Warning	LBF	Brown, Keya Paha, Rock	31 min
Aug 17, 9:09 PM MDT	Severe Thunderstorm Warning	LBF	Boyd, Brown, Holt, Keya Paha, Rock	51 min
Aug 18, 3:22 PM MDT	Severe Thunderstorm Warning	LBF	Boyd	53 min
Aug 18, 3:43 PM MDT	Severe Thunderstorm Warning	LBF	Holt	47 min
Aug 18, 3:54 PM MDT	Severe Thunderstorm Warning	LBF	Boyd, Holt	66 min
Aug 18, 4:19 PM MDT	Tornado Warning	LBF	Holt	26 min
Aug 18, 4:25 PM MDT	Severe Thunderstorm Warning	LBF	Holt	50 min
Aug 18, 4:53 PM MDT	Tornado Warning	LBF	Holt	37 min
Aug 18, 5:39 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	66 min

Nearby

Tornado Warnings in Nebraska, 2011 Every tornado warning in 2011 Tornadoes 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.