Alert archive / Nebraska / Tornado Warnings in 2011

Tornado Warning 74, NWS Hastings, NE

August 18, 2011Merrick County, Nance County, Nebraska

NWS Hastings, NE issued this tornado warning at Aug 18, 2011, 7:59 PM CDT for Merrick County, Nance County, Nebraska. It was in force for 31 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 18, 2011, 7:59 PM CDT (00:59 UTC)
Expired: Aug 18, 2011, 8:30 PM CDT
In force: 31 min
Issued by: NWS Hastings, NE
Area: Storm-based polygon

Counties Merrick County, NE, Nance County, NE

The radar

The Omaha radar (KOAX), 115 km from the middle of the area, began a volume at 01:02 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 18, 8:30 PM CDT	HAIL 1	6 Sw Genoa, NE	STRONG WINDS ALSO RECORD ON HIGHWAY 22 BETWEEN GENOA AND FULLERTON

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 18, 6:38 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.0 hours before the alert went out and 115 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: 1385 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 582 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 289 m²/s²
0-3 km storm-relative helicity: 636 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 47.4

Open this sounding in Storm Lab

The text

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

836 
WFUS53 KGID 190059
TORGID
NEC121-125-190130-
/O.NEW.KGID.TO.W.0074.110819T0059Z-110819T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
759 PM CDT THU AUG 18 2011

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN MERRICK COUNTY IN CENTRAL NEBRASKA...
  EASTERN NANCE COUNTY IN CENTRAL NEBRASKA...

* UNTIL 830 PM CDT

* AT 756 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR ST. EDWARD...OR 27 MILES NORTHWEST OF
  COLUMBUS...AND MOVING SOUTH AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GENOA AND SILVER CREEK.

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 4131 9766 4128 9771 4128 9786 4151 9792
      4152 9790 4153 9788 4153 9771 4148 9769
      4140 9770 4140 9762 4132 9760
TIME...MOT...LOC 0059Z 350DEG 26KT 4159 9781
HAIL 1.50IN

$$

HEINLEIN

1 follow-up statement

372 
WWUS53 KGID 190115
SVSGID

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
815 PM CDT THU AUG 18 2011

NEC121-125-190130-
/O.CON.KGID.TO.W.0074.000000T0000Z-110819T0130Z/
MERRICK NE-NANCE NE-
815 PM CDT THU AUG 18 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN NANCE AND
NORTHEASTERN MERRICK COUNTIES UNTIL 830 PM CDT...

AT 810 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 5 MILES NORTHWEST OF GENOA...OR 23 MILES WEST OF
COLUMBUS...MOVING SOUTH AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  GENOA AND SILVER CREEK.

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 4131 9766 4128 9771 4128 9786 4151 9792
      4152 9790 4153 9788 4153 9771 4148 9769
      4140 9770 4140 9762 4132 9760
TIME...MOT...LOC 0115Z 350DEG 26KT 4148 9778
HAIL 1.50IN

$$

HEINLEIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 8:22 PM CDT	Severe Thunderstorm Warning	GID	Merrick, Polk	38 min
Aug 18, 8:27 PM CDT	Tornado Warning	GID	Merrick, Nance, Polk	33 min
Aug 18, 8:45 PM CDT	Tornado Warning	GID	Polk, York	21 min
Aug 18, 9:02 PM CDT	Severe Thunderstorm Warning	GID	Polk, York	43 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.