Alert archive / Nebraska / Tornado Warnings in 2011

Tornado Warning 73, NWS Hastings, NE

August 6, 2011Hamilton County, Merrick County, Nebraska

NWS Hastings, NE issued this tornado warning at Aug 6, 2011, 6:01 PM CDT for Hamilton County, Merrick County, Nebraska. It was in force for 29 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 6, 2011, 6:01 PM CDT (23:01 UTC)
Expired
Aug 6, 2011, 6:30 PM CDT
In force
29 min
Issued by
NWS Hastings, NE
Area
Storm-based polygon

Counties Hamilton County, NE, Merrick County, NE

The radar

The Grand Island radar (KUEX), 72 km from the middle of the area, began a volume at 23:04 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
Aug 6, 6:10 PM CDTHAIL 1.752 E Chapman, 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.

IssuedProductOfficeLasted
Aug 6, 5:32 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.0 hours before the alert went out and 157 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, Omaha, NE at 12:00Z on 2011-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1049 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, Omaha, NE at 12:00Z on 2011-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 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
1049 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
487 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

889 
WFUS53 KGID 062301
TORGID
NEC081-121-062330-
/O.NEW.KGID.TO.W.0073.110806T2301Z-110806T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
601 PM CDT SAT AUG 6 2011

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL HAMILTON COUNTY IN SOUTH CENTRAL NEBRASKA...
  SOUTHWESTERN MERRICK COUNTY IN CENTRAL NEBRASKA...

* UNTIL 630 PM CDT

* AT 559 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR CHAPMAN...OR 10 MILES NORTHEAST OF GRAND
  ISLAND...AND MOVING SOUTHEAST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CHAPMAN AND PHILLIPS.

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 4083 9821 4103 9829 4107 9818 4092 9795
TIME...MOT...LOC 2301Z 325DEG 13KT 4100 9821
HAIL 0.88IN

$$
2 follow-up statements
910 
WWUS53 KGID 062316
SVSGID

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
616 PM CDT SAT AUG 6 2011

NEC081-121-062330-
/O.CON.KGID.TO.W.0073.000000T0000Z-110806T2330Z/
HAMILTON NE-MERRICK NE-
616 PM CDT SAT AUG 6 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTH CENTRAL MERRICK AND
CENTRAL HAMILTON COUNTIES UNTIL 630 PM CDT...

AT 613 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR CHAPMAN...OR 14 MILES EAST OF GRAND ISLAND...
MOVING SOUTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF CENTRAL HAMILTON COUNTY.

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 4088 9807 4098 9821 4103 9812 4092 9795
TIME...MOT...LOC 2316Z 309DEG 17KT 4096 9809
HAIL 1.00IN

$$
690 
WWUS53 KGID 062331
SVSGID

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
631 PM CDT SAT AUG 6 2011

NEC081-121-062341-
/O.EXP.KGID.TO.W.0073.000000T0000Z-110806T2330Z/
HAMILTON NE-MERRICK NE-
631 PM CDT SAT AUG 6 2011

...THE TORNADO WARNING FOR SOUTH CENTRAL MERRICK AND CENTRAL HAMILTON
COUNTIES HAS EXPIRED...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT
FOR THE AREA.  HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 4088 9807 4098 9821 4103 9812 4092 9795
TIME...MOT...LOC 2316Z 309DEG 17KT 4096 9809

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 3:56 AM CDTDense Fog AdvisoryGIDAdams, Buffalo, Clay, Fillmore, Greeley, Hall and 12 more6 hr
Aug 6, 5:13 PM CDTSevere Thunderstorm WarningGIDHamilton, Howard, Merrick47 min
Aug 6, 5:51 PM CDTSevere Thunderstorm WarningGIDHamilton, Merrick39 min
Aug 6, 6:24 PM CDTSevere Thunderstorm WarningGIDHamilton, Merrick, Polk, York51 min
Aug 6, 6:28 PM CDTSevere Thunderstorm WarningGIDMerrick, Nance, Polk16 min
Aug 6, 6:55 PM CDTSevere Thunderstorm WarningGIDYork35 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.