Alert archive / Nebraska / Tornado Warnings in 2011

Tornado Warning 45, NWS North Platte, NE

August 11, 2011Cherry County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 11, 2011, 7:21 PM MDT for Cherry County, Nebraska. It was in force for 39 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 11, 2011, 7:21 PM MDT (01:21 UTC)
Expired: Aug 11, 2011, 8:00 PM MDT
In force: 39 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon

County Cherry County, NE

The radar

The North Platte radar (KLNX), 57 km from the middle of the area, began a volume at 01:22 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 11, 7:32 PM MDT	HAIL 1.25	29 S Valentine, NE
Aug 11, 7:35 PM MDT	HAIL 2.75	29 S Valentine, NE
Aug 11, 8:10 PM MDT	HAIL 1	12 E Brownlee, 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 11, 3:38 PM MDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.4 hours before the alert went out and 148 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: 2513 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1288 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 281 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 19.6

Open this sounding in Storm Lab

The text

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

352 
WFUS53 KLBF 120121
TORLBF
NEC031-120200-
/O.NEW.KLBF.TO.W.0045.110812T0121Z-110812T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
821 PM CDT THU AUG 11 2011

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL CHERRY COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 900 PM CDT

* AT 821 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR VALENTINE NATIONAL WILDLIFE REFUGE...OR 24
  MILES SOUTH OF VALENTINE...AND MOVING SOUTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HIGHWAY 83 CROSSING GOOSE CREEK...BROWNLEE AND HIGHWAY 83 CROSSING
  THE NORTH LOUP RIVER.

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 4266 10046 4234 10016 4232 10016 4223 10062
      4254 10072
TIME...MOT...LOC 0121Z 308DEG 9KT 4252 10050

$$

SCHULTZ

2 follow-up statements

644 
WWUS53 KLBF 120134
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
834 PM CDT THU AUG 11 2011

NEC031-120200-
/O.CON.KLBF.TO.W.0045.000000T0000Z-110812T0200Z/
CHERRY NE-
834 PM CDT THU AUG 11 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL CHERRY COUNTY
UNTIL 900 PM CDT...

AT 834 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 6 MILES NORTHEAST OF HIGHWAY 83 CROSSING GOOSE
CREEK...OR 29 MILES SOUTH OF VALENTINE...MOVING SOUTHEAST AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
  BROWNLEE AND HIGHWAY 83 CROSSING THE NORTH LOUP RIVER.

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 4266 10046 4234 10016 4232 10016 4223 10062
      4254 10072
TIME...MOT...LOC 0134Z 308DEG 9KT 4246 10046

$$

SCHULTZ

918 
WWUS53 KLBF 120145
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
845 PM CDT THU AUG 11 2011

NEC031-120200-
/O.CON.KLBF.TO.W.0045.000000T0000Z-110812T0200Z/
CHERRY NE-
845 PM CDT THU AUG 11 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL CHERRY COUNTY
UNTIL 900 PM CDT...

AT 845 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR HIGHWAY 83 CROSSING GOOSE CREEK...OR 30 MILES
NORTH OF THEDFORD...MOVING SOUTHEAST AT 15 MPH.

AT 835 PM CDT...BASEBALL SIZE HAIL WAS REPORTED WITH THIS STORM 29
MILES SOUTH OF VALENTINE.

LOCATIONS IMPACTED INCLUDE...
  BROWNLEE AND HIGHWAY 83 CROSSING THE NORTH LOUP RIVER.

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 4234 10016 4232 10016 4223 10062 4253 10071
      4262 10042
TIME...MOT...LOC 0145Z 326DEG 13KT 4239 10051

$$

SCHULTZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 6:03 PM MDT	Severe Thunderstorm Warning	LBF	Boyd, Holt, Keya Paha, Rock	42 min
Aug 11, 6:46 PM MDT	Severe Thunderstorm Warning	LBF	Boyd, Holt, Keya Paha, Rock	44 min
Aug 11, 6:48 PM MDT	Tornado Warning	LBF	Brown, Cherry	27 min
Aug 11, 6:55 PM MDT	Severe Thunderstorm Warning	LBF	Brown, Keya Paha, Rock	50 min
Aug 11, 7:02 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	28 min
Aug 11, 7:07 PM MDT	Tornado Warning	LBF	Brown, Cherry	23 min
Aug 11, 7:30 PM MDT	Severe Thunderstorm Warning	LBF	Chase	45 min
Aug 11, 7:30 PM MDT	Tornado Warning	LBF	Brown, Cherry	30 min
Aug 11, 7:40 PM MDT	Severe Thunderstorm Warning	LBF	Brown, Holt, Keya Paha, Rock	51 min
Aug 11, 7:58 PM MDT	Tornado Warning	LBF	Brown	32 min
Aug 11, 7:59 PM MDT	Tornado Warning	LBF	Cherry	31 min
Aug 11, 8:30 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Brown, Cherry, Thomas	45 min
Aug 11, 8:50 PM MDT	Tornado Warning	LBF	Blaine, Cherry, Thomas	25 min
Aug 11, 9:14 PM MDT	Tornado Warning	LBF	Blaine, Thomas	31 min
Aug 11, 9:29 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Loup	46 min
Aug 11, 9:38 PM MDT	Severe Thunderstorm Warning	LBF	Brown, Cherry	52 min
Aug 11, 9:45 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Custer	45 min
Aug 11, 10:17 PM MDT	Severe Thunderstorm Warning	LBF	Custer, Garfield, Loup	43 min
Aug 11, 10:25 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Brown, Cherry, Thomas	65 min
Aug 11, 11:09 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Loup	51 min
Aug 12, 12:00 AM MDT	Severe Thunderstorm Warning	LBF	Custer, Loup	45 min
Aug 12, 12:24 AM MDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	66 min
Aug 12, 12:57 AM MDT	Severe Thunderstorm Warning	LBF	Cherry	27 min
Aug 12, 1:41 AM MDT	Severe Thunderstorm Warning	LBF	Cherry	49 min
Aug 12, 2:02 AM MDT	Severe Thunderstorm Warning	LBF	Cherry	32 min
Aug 12, 2:57 AM MDT	Areal Flood Advisory	LBF	Brown, Cherry, Rock	6 hr

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.