Alert archive / Texas / Tornado Warnings in 2012

Tornado Warning 1, NWS Norman, OK

March 18, 2012Foard County, Texas

NWS Norman, OK issued this tornado warning at Mar 18, 2012, 5:46 PM CDT for Foard County, Texas. It was in force for 29 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: Mar 18, 2012, 5:46 PM CDT (22:46 UTC)
Expired: Mar 18, 2012, 6:15 PM CDT
In force: 29 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

County Foard County, TX

The radar

The Altus AFB radar (KFDR), 78 km from the middle of the area, began a volume at 22:46 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
Mar 18, 3:12 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.8 hours before the alert went out and 226 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: 1066 J/kg
Mixed-layer CIN: -188 J/kg
Mixed-layer LCL: 832 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

679 
WFUS54 KOUN 182246
TOROUN
TXC155-182315-
/O.NEW.KOUN.TO.W.0001.120318T2246Z-120318T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
546 PM CDT SUN MAR 18 2012

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL FOARD COUNTY IN NORTH CENTRAL TEXAS...

* UNTIL 615 PM CDT

* AT 541 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A 
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS 
  STORM WAS LOCATED NEAR CROWELL...MOVING NORTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CROWELL AND MARGARET. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE 
LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE 
HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND 
PROTECT YOURSELF FROM FLYING DEBRIS.

A TORNADO MAY FORM AT ANYTIME. TAKE COVER NOW. ABANDON MOBILE 
HOMES AND VEHICLES.  IF POSSIBLE...MOVE TO A BASEMENT OR STORM 
SHELTER. OTHERWISE...MOVE TO AN INTERIOR ROOM OR HALLWAY ON THE 
LOWEST FLOOR. STAY AWAY FROM WINDOWS.

&&

LAT...LON 3409 9971 3404 9950 3388 9977 3398 9990
TIME...MOT...LOC 2241Z 228DEG 19KT 3395 9982 

$$

WR

1 follow-up statement

505 
WWUS54 KOUN 182307
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
607 PM CDT SUN MAR 18 2012

TXC155-182315-
/O.CON.KOUN.TO.W.0001.000000T0000Z-120318T2315Z/
FOARD TX-
607 PM CDT SUN MAR 18 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR EAST 
CENTRAL FOARD COUNTY...

AT 603 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS 
STORM WAS LOCATED NEAR CROWELL...MOVING NORTHEAST AT 20 MPH. 

LOCATIONS IMPACTED INCLUDE...
MARGARET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE 
LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE 
HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND 
PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3409 9969 3404 9950 3393 9969 3403 9975
TIME...MOT...LOC 2303Z 237DEG 19KT 3400 9968 

$$

WR

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 18, 4:13 PM CDT	Special Weather Statement	OUN	Foard	32 min
Mar 18, 4:36 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Knox	54 min
Mar 18, 4:55 PM CDT	Severe Thunderstorm Warning	OUN	Hardeman	65 min
Mar 18, 5:26 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	64 min
Mar 18, 5:28 PM CDT	Special Weather Statement	OUN	Knox	32 min
Mar 18, 5:36 PM CDT	Severe Thunderstorm Warning	OUN	Knox	54 min
Mar 18, 6:26 PM CDT	Severe Thunderstorm Warning	OUN	Hardeman, Wilbarger	64 min
Mar 18, 6:39 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Knox	66 min

Nearby

Tornado Warnings in Texas, 2012 Every tornado warning in 2012 Tornadoes in 2012

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.