Alert archive / Oklahoma / Tornado Warnings in 2005

Tornado Warning 9, NWS Norman, OK

March 21, 2005Grant County, Oklahoma

NWS Norman, OK issued this tornado warning at Mar 21, 2005, 4:40 PM CST for Grant County, Oklahoma. It was in force for 35 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 21, 2005, 4:40 PM CST (22:40 UTC)
Expired: Mar 21, 2005, 5:15 PM CST
In force: 35 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Grant County, OK

The radar

The Vance AFB radar (KVNX), 31 km from the middle of the area, began a volume at 22:43 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 21, 12:15 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 10.7 hours before the alert went out and 185 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 512 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 434 m²/s²
0-3 km storm-relative helicity: 584 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000
WFUS54 KOUN 212240
TOROUN
OKC053-212315-
/O.NEW.KOUN.TO.W.0009.050321T2240Z-050321T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
440 PM CST MON MAR 21 2005

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
  GRANT COUNTY IN NORTHERN OKLAHOMA

* UNTIL 515 PM CST

* AT 440 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 4 MILES
  SOUTHWEST OF MEDFORD...MOVING NORTHEAST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE MEDFORD AND RENFROW

IN ADDITION TO A TORNADO THREAT... THIS STORM LIKELY CONTAINS 
DAMAGING HAIL TO THE SIZE OF TENNIS BALLS OR LARGER.

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 3678 9790 3674 9778 3697 9761 3698 9787

$$
WR

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 21, 2:41 PM CST	Severe Thunderstorm Warning	OUN	Alfalfa	34 min
Mar 21, 2:46 PM CST	Tornado Warning	OUN	Seminole	29 min
Mar 21, 2:54 PM CST	Tornado Warning	OUN	Alfalfa	36 min
Mar 21, 3:12 PM CST	Tornado Warning	OUN	Seminole	33 min
Mar 21, 3:22 PM CST	Tornado Warning	OUN	Hughes	38 min
Mar 21, 3:26 PM CST	Tornado Warning	OUN	Alfalfa	34 min
Mar 21, 3:38 PM CST	Tornado Warning	OUN	Grant	37 min
Mar 21, 3:53 PM CST	Tornado Warning	OUN	Hughes	38 min
Mar 21, 4:13 PM CST	Tornado Warning	OUN	Grant	32 min

Nearby

Tornado Warnings in Oklahoma, 2005 Every tornado warning in 2005 Tornadoes in 2005

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.