Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 104, NWS Tulsa, OK

June 18, 2011Osage County, Washington County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Jun 18, 2011, 8:33 PM CDT for Osage County, Washington County, Oklahoma. It was in force for 42 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: Jun 18, 2011, 8:33 PM CDT (01:33 UTC)
Expired: Jun 18, 2011, 9:15 PM CDT
In force: 42 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Osage County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 83 km from the middle of the area, began a volume at 01:34 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
Jun 18, 9:10 PM CDT	HAIL 1.75	2 Nw Copan, OK	SPOTTER REPORTED GOLD BALL HAIL IN THE COPAN LAKE AREA.

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
Jun 18, 6:03 PM CDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 1.6 hours before the alert went out and 141 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: 3821 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 2143 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 12.3

Open this sounding in Storm Lab

The text

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

639 
WFUS54 KTSA 190133
TORTSA
OKC113-147-190215-
/O.NEW.KTSA.TO.W.0104.110619T0133Z-110619T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
833 PM CDT SAT JUN 18 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN OSAGE COUNTY IN NORTHEAST OKLAHOMA
  WASHINGTON COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 915 PM CDT

* AT 830 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 5 MILES WEST OF HULAH...MOVING EAST AT 20 MPH.
  THIS IS A DANGEROUS STORM WITH STRONG LOW LEVEL ROTATION...A       
  TORNADO COULD FORM AT ANY TIME.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...HULAH
  AND COPAN.

THIS WARNING REPLACES THE PREVIOUS TORNADO WARNING IN EFFECT FOR 
NORTHEAST OSAGE COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW! IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS!

&&

LAT...LON 3679 9581 3678 9582 3688 9617 3695 9617
      3698 9581
TIME...MOT...LOC 0132Z 278DEG 18KT 3691 9612

$$

1 follow-up statement

583 
WWUS54 KTSA 190157
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
857 PM CDT SAT JUN 18 2011

OKC113-190207-
/O.CAN.KTSA.TO.W.0104.000000T0000Z-110619T0215Z/
OSAGE OK-
857 PM CDT SAT JUN 18 2011

...THE TORNADO WARNING FOR NORTHEASTERN OSAGE COUNTY IS CANCELLED...

LAT...LON 3680 9581 3685 9600 3692 9600 3696 9581
TIME...MOT...LOC 0157Z 278DEG 18KT 3689 9597

$$

OKC147-190215-
/O.CON.KTSA.TO.W.0104.000000T0000Z-110619T0215Z/
WASHINGTON OK-
857 PM CDT SAT JUN 18 2011

...TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR WASHINGTON
COUNTY...

AT 855 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO LOCATED NEAR COPAN...
MOVING EAST AT 20 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...COPAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE NEAR THE PATH OF THIS STORM...TAKE COVER NOW! IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS!

NIGHTTIME TORNADOES ARE ESPECIALLY DANGEROUS...TAKE COVER NOW! IF YOU
WAIT UNTIL YOU SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A
SAFE PLACE!

&&

LAT...LON 3680 9581 3685 9600 3692 9600 3696 9581
TIME...MOT...LOC 0157Z 278DEG 18KT 3689 9597

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 7:35 PM CDT	Tornado Warning	TSA	Osage	40 min
Jun 18, 7:48 PM CDT	Severe Thunderstorm Warning	TSA	Osage	57 min
Jun 18, 8:04 PM CDT	Tornado Warning	TSA	Osage	41 min
Jun 18, 8:37 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	38 min
Jun 18, 9:11 PM CDT	Tornado Warning	TSA	Nowata, Washington	49 min
Jun 18, 9:16 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	59 min
Jun 18, 9:37 PM CDT	Tornado Warning	TSA	Nowata	43 min
Jun 18, 10:08 PM CDT	Special Weather Statement	TSA	Osage	37 min
Jun 19, 2:20 AM CDT	Special Weather Statement	TSA	Nowata	25 min

Nearby

Tornado Warnings in Oklahoma, 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.