Alert archive / Nebraska / Tornado Warnings in 2009

Tornado Warning 40, NWS North Platte, NE

June 17, 2009Boyd County, Holt County, Keya Paha County, Nebraska

NWS North Platte, NE issued this tornado warning at Jun 17, 2009, 6:15 PM CDT for Boyd County, Holt County, Keya Paha County, Nebraska. It was in force for 30 min. 4 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 17, 2009, 6:15 PM CDT (23:15 UTC)
Expired: Jun 17, 2009, 6:45 PM CDT
In force: 30 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon

Counties Boyd County, NE, Holt County, NE, Keya Paha County, NE

The radar

The North Platte radar (KLNX), 161 km from the middle of the area, began a volume at 23:15 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 17, 6:20 PM CDT	HAIL 1	2 Sw Naper, NE	MARBLE TO QUARTER SIZE HAIL BEGAN AT 620 PM CDT AND CONTINUED THROUGH 630 PM CDT.
Jun 17, 6:37 PM CDT	HAIL 1	Naper, NE
Jun 17, 6:43 PM CDT	HAIL 1.25	Naper, NE
Jun 17, 6:53 PM CDT	HAIL 0.75	Butte, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.3 hours before the alert went out and 230 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: 368 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 831 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KLBF 172315
TORLBF
NEC015-089-103-172345-
/O.NEW.KLBF.TO.W.0040.090617T2315Z-090617T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
615 PM CDT WED JUN 17 2009

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN BOYD COUNTY IN NORTH CENTRAL NEBRASKA...
  NORTHWESTERN HOLT COUNTY IN NORTH CENTRAL NEBRASKA...
  NORTHEASTERN KEYA PAHA COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 645 PM CDT

* AT 613 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 9 MILES WEST OF
  NAPER...OR 25 MILES EAST OF SPRINGVIEW...MOVING EAST AT 30 MPH.

* THE TORNADO WILL BE NEAR...
  6 MILES SOUTH OF NAPER BY 625 PM CDT...
  HULL LAKE STATE WILDLIFE MANAGEMENT AREA...6 MILES WEST OF PARSHALL
  BRIDGE STATE WILDLIFE MANAGEMENT AREA AND 8 MILES SOUTHWEST OF
  BUTTE BY 645 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
BASEBALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

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 1100 PM CDT WEDNESDAY EVENING
FOR SOUTHWESTERN NEBRASKA.

&&

LAT...LON 4290 9879 4269 9890 4287 9943 4300 9936
      4300 9920
TIME...MOT...LOC 2314Z 292DEG 27KT 4291 9926

$$

DDB

1 follow-up statement

000 
WWUS53 KLBF 172325
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
625 PM CDT WED JUN 17 2009

NEC015-089-103-172345-
/O.CON.KLBF.TO.W.0040.000000T0000Z-090617T2345Z/
HOLT NE-BOYD NE-KEYA PAHA NE-
625 PM CDT WED JUN 17 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
NORTHEASTERN KEYA PAHA...WESTERN BOYD AND NORTHWESTERN HOLT
COUNTIES...

AT 622 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR HIGHWAY 12 MILE
MARKER 90...OR 24 MILES WEST OF SPENCER...MOVING EAST AT 20 MPH.

THE TORNADO WILL BE NEAR...
  NAPER BY 630 PM CDT...
  8 MILES NORTHWEST OF HULL LAKE STATE WILDLIFE MANAGEMENT AREA AND 9
  MILES WEST OF BUTTE BY 645 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING
BASEBALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

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 1100 PM CDT WEDNESDAY EVENING
FOR SOUTHWESTERN NEBRASKA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS
IN EFFECT UNTIL 100 AM CDT THURSDAY MORNING FOR NORTH CENTRAL
NEBRASKA.

&&

LAT...LON 4290 9879 4269 9890 4287 9943 4300 9936
      4300 9920
TIME...MOT...LOC 2325Z 281DEG 16KT 4295 9914

$$

DDB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 5:37 PM CDT	Tornado Warning	LBF	Boyd, Holt, Keya Paha	38 min
Jun 17, 5:50 PM CDT	Severe Thunderstorm Warning	LBF	Garden, Sheridan	55 min
Jun 17, 6:32 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	58 min
Jun 17, 6:36 PM CDT	Severe Thunderstorm Warning	LBF	Custer	54 min
Jun 17, 6:41 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	64 min
Jun 17, 6:47 PM CDT	Tornado Warning	LBF	Boyd, Holt	43 min

Nearby

Tornado Warnings in Nebraska, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.