Alert archive / Nebraska / Tornado Warnings in 2011

Tornado Warning 35, NWS North Platte, NE

July 11, 2011Cherry County, Nebraska

NWS North Platte, NE issued this tornado warning at Jul 11, 2011, 6:19 PM MDT for Cherry County, Nebraska. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 11, 2011, 6:19 PM MDT (00:19 UTC)
Expired: Jul 11, 2011, 7:00 PM MDT
In force: 41 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon

County Cherry County, NE

The radar

The North Platte radar (KLNX), 109 km from the middle of the area, began a volume at 00:22 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 11, 4:06 PM MDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.3 hours before the alert went out and 175 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: 2166 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 1348 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 170 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

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

911 
WFUS53 KLBF 120019
TORLBF
NEC031-120100-
/O.NEW.KLBF.TO.W.0035.110712T0019Z-110712T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
619 PM MDT MON JUL 11 2011

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

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

* UNTIL 700 PM MDT

* AT 617 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR INTERSECTION OF HIGHWAY 61 AND SURVEY VALLEY
  ROAD...OR 40 MILES SOUTHEAST OF GORDON...AND MOVING NORTH AT 10
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  ROUND LAKE...HIGHWAY 61 CROSSING THE SNAKE RIVER AND HIGHWAY 61
  MILE MARKER 190.

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.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN NORTH PLATTE.

&&

LAT...LON 4262 10181 4258 10142 4226 10161 4230 10185
TIME...MOT...LOC 0020Z 192DEG 7KT 4237 10170

$$

BROOKS

1 follow-up statement

147 
WWUS53 KLBF 120035
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
735 PM CDT MON JUL 11 2011

NEC031-120100-
/O.CON.KLBF.TO.W.0035.000000T0000Z-110712T0100Z/
CHERRY NE-
635 PM MDT MON JUL 11 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL CHERRY COUNTY
UNTIL 700 PM MDT...

AT 631 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR INTERSECTION OF HIGHWAY 61 AND SURVEY VALLEY
ROAD...OR 38 MILES SOUTHEAST OF GORDON...MOVING NORTH AT 10 MPH.

THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF WEST CENTRAL 
CHERRY COUNTY...INCLUDING HIGHWAY 61 MILE MARKER 190.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN NORTH PLATTE.

&&

LAT...LON 4231 10158 4235 10184 4262 10181 4258 10142
TIME...MOT...LOC 0035Z 188DEG 7KT 4240 10170

$$

BROOKS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 6:14 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	61 min
Jul 11, 7:02 PM MDT	Tornado Warning	LBF	Cherry	41 min
Jul 11, 7:12 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	63 min
Jul 11, 7:17 PM MDT	Tornado Warning	LBF	Cherry	28 min
Jul 11, 7:23 PM MDT	Severe Thunderstorm Warning	LBF	Deuel	67 min
Jul 11, 7:55 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	50 min
Jul 11, 8:40 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Hooker, Thomas	65 min
Jul 11, 10:37 PM MDT	Severe Thunderstorm Warning	LBF	Hooker, Logan, McPherson, Thomas	53 min
Jul 11, 11:18 PM MDT	Tornado Warning	LBF	Thomas	27 min
Jul 12, 3:00 PM MDT	Flash Flood Watch	LBF	Chase, Deuel, Hayes, Keith, Lincoln, Perkins	15 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.