Alert archive / Nebraska / Tornado Warnings in 2011

Tornado Warning 19, NWS Hastings, NE

May 12, 2011York County, Nebraska

NWS Hastings, NE issued this tornado warning at May 12, 2011, 7:21 PM CDT for York County, Nebraska. It was in force for 24 min. 2 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 12, 2011, 7:21 PM CDT (00:21 UTC)
Expired: May 12, 2011, 7:45 PM CDT
In force: 24 min
Issued by: NWS Hastings, NE
Area: Storm-based polygon

County York County, NE

The radar

The Grand Island radar (KUEX), 98 km from the middle of the area, began a volume at 00:24 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
May 12, 7:30 PM CDT	HAIL 1	York, NE	DIME TO QUARTER SIZE HAIL.
May 12, 7:44 PM CDT	HAIL 1.5	3 E Bradshaw, 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.

Issued	Product	Office	Lasted
May 12, 2:37 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.4 hours before the alert went out and 114 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: 1648 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 900 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

427 
WFUS53 KGID 130021
TORGID
NEC185-130045-
/O.NEW.KGID.TO.W.0019.110513T0021Z-110513T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
721 PM CDT THU MAY 12 2011

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN YORK COUNTY IN EAST CENTRAL NEBRASKA...

* UNTIL 745 PM CDT

* AT 715 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR YORK...AND MOVING NORTH AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BENEDICT AND THAYER.

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 4100 9782 4105 9763 4105 9752 4089 9745
      4083 9765
TIME...MOT...LOC 0019Z 166DEG 8KT 4089 9762
HAIL 1.00IN

$$

2 follow-up statements

106 
WWUS53 KGID 130036
SVSGID

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
736 PM CDT THU MAY 12 2011

NEC185-130045-
/O.CON.KGID.TO.W.0019.000000T0000Z-110513T0045Z/
YORK NE-
736 PM CDT THU MAY 12 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHERN YORK COUNTY UNTIL
745 PM CDT...

AT 733 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR YORK...MOVING NORTH AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
  BENEDICT AND THAYER.

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 4100 9782 4105 9763 4105 9752 4089 9745
      4083 9765
TIME...MOT...LOC 0036Z 166DEG 8KT 4088 9759
HAIL 1.50IN

$$

181 
WWUS53 KGID 130045
SVSGID

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
745 PM CDT THU MAY 12 2011

NEC185-130054-
/O.EXP.KGID.TO.W.0019.000000T0000Z-110513T0045Z/
YORK NE-
745 PM CDT THU MAY 12 2011

...THE TORNADO WARNING FOR NORTHERN YORK COUNTY WILL EXPIRE AT 745 PM
CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 10 PM CDT.

REMEMBER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR 
EASTERN HAMILTON...MERRICK...SOUTHEASTERN NANCE...WESTERN POLK...AND 
YORK COUNTIES UNTIL 815 PM CDT.

LAT...LON 4100 9782 4105 9763 4105 9752 4089 9745
      4083 9765
TIME...MOT...LOC 0044Z 166DEG 8KT 4090 9760

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 7:00 PM CDT	Severe Thunderstorm Warning	GID	Fillmore, Thayer	45 min
May 12, 7:12 PM CDT	Severe Thunderstorm Warning	GID	Hamilton, Merrick, Nance, Polk, York	48 min
May 12, 7:39 PM CDT	Severe Thunderstorm Warning	GID	Polk	36 min
May 12, 7:42 PM CDT	Severe Thunderstorm Warning	GID	Clay, Fillmore	38 min
May 12, 7:46 PM CDT	Special Weather Statement	GID	Nuckolls	29 min
May 12, 7:53 PM CDT	Severe Thunderstorm Warning	GID	Polk, York	52 min
May 12, 11:22 PM CDT	Areal Flood Warning	GID	Hall, Howard, Merrick	12 hr
May 12, 11:27 PM CDT	Areal Flood Warning	GID	Sherman	10 hr
May 12, 11:49 PM CDT	Wind Advisory	GID	Adams, Buffalo, Clay, Dawson, Fillmore, Franklin and 18 more	4 hr
May 13, 12:23 AM CDT	Areal Flood Warning	GID	Hamilton, Polk, York	12 hr
May 13, 11:29 AM CDT	Areal Flood Warning	GID	Hall, Merrick	5 hr
May 13, 12:27 PM CDT	Areal Flood Warning	GID	Polk, York	24 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.