Alert archive / Nebraska / Tornado Warnings in 2007

Tornado Warning 91, NWS North Platte, NE

August 21, 2007Holt County, Wheeler County, Nebraska

NWS North Platte, NE issued this tornado warning at Aug 21, 2007, 6:28 PM CDT for Holt County, Wheeler County, Nebraska. It was in force for 32 min. 1 report 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 21, 2007, 6:28 PM CDT (23:28 UTC)
Expired: Aug 21, 2007, 7:00 PM CDT
In force: 32 min
Issued by: NWS North Platte, NE
Area: Counties, with a storm outline in the text

Counties Holt County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 183 km from the middle of the area, began a volume at 23:27 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 21, 6:40 PM CDT	HAIL 1	11 E Chambers, 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 21, 3:45 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.5 hours before the alert went out and 195 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: 174 J/kg
Mixed-layer CIN: -479 J/kg
Mixed-layer LCL: 1438 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 61 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.

000 
WFUS53 KLBF 212330
TORLBF
NEC089-183-220000-
/O.NEW.KLBF.TO.W.0091.070821T2328Z-070822T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
628 PM CDT TUE AUG 21 2007

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN HOLT COUNTY IN NORTH CENTRAL NEBRASKA...
  NORTHEASTERN WHEELER COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 700 PM CDT

* AT 627 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD   
  NEAR 9 NORTHWEST OF EWING AT THE JUNCTION OF HIGHWAY 20 AND        
  275...MOVING SOUTHEAST AT 30 MPH.

* THE TORNADO WILL BE NEAR...
  8 MILES NORTHEAST OF FOUR CORNERS BY 640 PM CDT...
  6 MILES SOUTHWEST OF KNIEVELS CORNER BY 645 PM CDT...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT TUESDAY EVENING
FOR NORTH CENTRAL NEBRASKA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS
IN EFFECT UNTIL 1000 PM CDT TUESDAY EVENING FOR SOUTHWEST NEBRASKA.

LAT...LON 4187 9836 4218 9887 4248 9853 4246 9829
      4244 9828 4228 9829 4227 9827 4210 9827
TIME...MOT...LOC 2328Z 311DEG 28KT 4214 9855

$$

POWER

1 follow-up statement

000 
WWUS53 KLBF 212345
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
645 PM CDT TUE AUG 21 2007

NEC089-183-220000-
/O.CON.KLBF.TO.W.0091.000000T0000Z-070822T0000Z/
WHEELER NE-HOLT NE-
645 PM CDT TUE AUG 21 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
SOUTHEASTERN HOLT AND NORTHEASTERN WHEELER COUNTIES...

AT 642 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED 6 MILES SOUTHWEST OF
KNIEVELS CORNER...OR ABOUT 29 MILES SOUTH OF ONEILL...MOVING
SOUTHEAST AT 30 MPH.

THE TORNADO WILL BE NEAR...
  RURAL EASTERN WHEELER COUNTY AT 700 PM CDT

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT TUESDAY EVENING
FOR NORTH CENTRAL NEBRASKA.

A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM CDT
TUESDAY EVENING FOR SOUTHWEST NEBRASKA.

LAT...LON 4187 9836 4218 9887 4248 9853 4246 9829
      4244 9828 4228 9829 4227 9827 4210 9827
TIME...MOT...LOC 2345Z 311DEG 28KT 4205 9842

$$

POWER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 4:40 AM CDT	Red Flag Warning	LBF	Arthur, Chase, Cherry, Deuel, Garden, Grant and 5 more	16 hr
Aug 21, 4:48 AM CDT	Dense Fog Advisory	LBF	Keith, Lincoln	4 hr
Aug 21, 5:21 PM CDT	Severe Thunderstorm Warning	LBF	Holt	24 min
Aug 21, 5:44 PM CDT	Severe Thunderstorm Warning	LBF	Holt	46 min
Aug 21, 5:47 PM CDT	Severe Thunderstorm Warning	LBF	Frontier	43 min
Aug 21, 6:03 PM CDT	Tornado Warning	LBF	Holt	27 min
Aug 21, 6:29 PM CDT	Severe Thunderstorm Warning	LBF	Frontier	46 min
Aug 21, 6:43 PM CDT	Severe Thunderstorm Warning	LBF	Garfield	47 min
Aug 21, 6:58 PM CDT	Severe Thunderstorm Warning	LBF	Holt, Wheeler	62 min

Nearby

Tornado Warnings in Nebraska, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.