Alert archive / Nebraska / Tornado Warnings in 2011

Tornado Warning 4, NWS North Platte, NE

May 30, 2011Holt County, Rock County, Nebraska

NWS North Platte, NE issued this tornado warning at May 30, 2011, 4:47 PM CDT for Holt County, Rock County, Nebraska. It was in force for 28 min. 8 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
May 30, 2011, 4:47 PM CDT (21:47 UTC)
Expired
May 30, 2011, 5:15 PM CDT
In force
28 min
Issued by
NWS North Platte, NE
Area
Storm-based polygon

Counties Holt County, NE, Rock County, NE

The radar

The North Platte radar (KLNX), 143 km from the middle of the area, began a volume at 21:47 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

TimeReportWhereRemark
May 30, 5:00 PM CDTHAIL 2.756 Sw Atkinson, NEBASEBALL SIZED HAIL 6 MILES SOUTHWEST OF ATKINSON.
May 30, 5:05 PM CDTTORNADO3 S Atkinson, NEDISPATCHER RELAYED REPORT OF TORNADO 3 MILES SOUTH OF ATKINSON. LOTS OF DEBRIS REPORTED ALONG HIGHWAY 11.
May 30, 5:10 PM CDTHAIL 2.75Atkinson, NEBASEBALL SIZED HAIL FALLING 1 MILE SOUTH OF ATKINSON ON HIGHWAY 11.
May 30, 5:10 PM CDTHAIL 4Atkinson, NEAT LEAST GRAPEFRUIT SIZE HAIL REPORTED IN THE CENTER OF ATKINSON. TIME OF REPORT WAS 510 PM CDT.
May 30, 5:11 PM CDTHAIL 2.75Atkinson, NEBASEBALL SIZE HAIL FALLING IN SOUTHWEST PART OF ATKINSON.
May 30, 5:13 PM CDTHAIL 2.75Atkinson, NEBASEBALL HAIL FALLING AT COUNTRY CLUB AND ELSEWHERE IN ATKINSON.
May 30, 5:16 PM CDTHAIL 23 Ne Atkinson, NE
May 30, 5:17 PM CDTHAIL 43 Ese Atkinson, NENEARLY GRAPEFRUIT SIZE HAIL SIZE MEASURED BY STORM CHASER. ACTUAL DIAMETER OF STONE WAS 3.5 INCHES.

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.

IssuedProductOfficeLasted
May 30, 2:08 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 9.8 hours before the alert went out and 203 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 12:00Z on 2011-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1099 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 12:00Z on 2011-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 296 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1099 J/kg
Mixed-layer CIN
-360 J/kg
Mixed-layer LCL
2078 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
296 m²/s²
0-3 km storm-relative helicity
302 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.

397 
WFUS53 KLBF 302147
TORLBF
NEC089-149-302215-
/O.NEW.KLBF.TO.W.0004.110530T2147Z-110530T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
447 PM CDT MON MAY 30 2011

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL HOLT COUNTY IN NORTH CENTRAL NEBRASKA...
  EAST CENTRAL ROCK COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 515 PM CDT

* AT 443 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR PONY LAKE...OR 20 MILES SOUTHEAST OF
  BASSETT...AND MOVING NORTHEAST AT 40 MPH.

* THIS DANGEROUS STORM WILL BE NEAR...
  ATKINSON AROUND 510 PM CDT.

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 4271 9886 4253 9869 4226 9926 4241 9940
TIME...MOT...LOC 2147Z 235DEG 35KT 4240 9921

$$

POWER
1 follow-up statement
161 
WWUS53 KLBF 302207
SVSLBF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
507 PM CDT MON MAY 30 2011

NEC089-149-302215-
/O.CON.KLBF.TO.W.0004.000000T0000Z-110530T2215Z/
HOLT NE-ROCK NE-
507 PM CDT MON MAY 30 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL ROCK AND
CENTRAL HOLT COUNTIES UNTIL 515 PM CDT...

AT 501 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO.  THIS 
TORNADO WAS LOCATED 3 MILES SOUTHWEST OF ATKINSON. MOVING NORTHEAST 
AT 40 MPH.

THE TORNADO WILL AFFECT ATKINSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 4271 9886 4253 9869 4226 9926 4241 9940
TIME...MOT...LOC 2206Z 235DEG 35KT 4250 9900

$$

POWER

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 10:08 PM CDTSevere Thunderstorm WarningLBFHolt52 min
May 29, 10:59 PM CDTSevere Thunderstorm WarningLBFBoyd, Holt30 min
May 30, 3:57 AM CDTWind AdvisoryLBFBlaine, Brown, Chase, Custer, Frontier, Garfield and 11 more14 hr
May 30, 3:03 PM CDTSevere Thunderstorm WarningLBFKeya Paha, Rock42 min
May 30, 3:09 PM CDTSevere Thunderstorm WarningLBFBlaine, Custer36 min
May 30, 3:43 PM CDTSevere Thunderstorm WarningLBFBlaine, Brown47 min
May 30, 4:08 PM CDTSevere Thunderstorm WarningLBFBrown, Rock52 min
May 30, 4:18 PM CDTSevere Thunderstorm WarningLBFBlaine, Custer, Logan42 min
May 30, 4:28 PM CDTTornado WarningLBFRock32 min
May 30, 4:55 PM CDTTornado WarningLBFBlaine35 min
May 30, 5:01 PM CDTSevere Thunderstorm WarningLBFBlaine, Custer, Logan44 min
May 30, 5:03 PM CDTSevere Thunderstorm WarningLBFBoyd16 min
May 30, 5:10 PM CDTTornado WarningLBFHolt35 min
May 30, 5:24 PM CDTTornado WarningLBFBrown, Loup, Rock36 min
May 30, 5:33 PM CDTFlash Flood WarningLBFBlaine3 hr
May 30, 5:37 PM CDTSevere Thunderstorm WarningLBFBlaine, Brown, Rock38 min
May 30, 5:43 PM CDTTornado WarningLBFBoyd, Holt32 min
May 30, 5:46 PM CDTTornado WarningLBFHolt, Rock29 min
May 30, 5:50 PM CDTSevere Thunderstorm WarningLBFBlaine, Custer40 min
May 30, 5:50 PM CDTSevere Thunderstorm WarningLBFArthur, Garden, Grant, Sheridan40 min
May 30, 6:11 PM CDTSevere Thunderstorm WarningLBFHolt, Rock49 min
May 30, 6:17 PM CDTSevere Thunderstorm WarningLBFBlaine, Brown, Loup, Rock43 min
May 30, 6:22 PM CDTHigh Wind WarningLBFChase, Frontier, Hayes, Keith, Lincoln, Logan and 2 more98 min
May 30, 6:25 PM CDTSevere Thunderstorm WarningLBFCherry, Sheridan50 min
May 30, 6:33 PM CDTSevere Thunderstorm WarningLBFCuster42 min
May 30, 6:40 PM CDTTornado WarningLBFHolt35 min
May 30, 6:54 PM CDTTornado WarningLBFBoyd, Holt21 min
May 30, 6:56 PM CDTSevere Thunderstorm WarningLBFLoup49 min

Nearby

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