Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 416, NWS Tulsa, OK

June 18, 2011Nowata County, Washington County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jun 18, 2011, 9:16 PM CDT for Nowata County, Washington County, Oklahoma. It was in force for 59 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
Jun 18, 2011, 9:16 PM CDT (02:16 UTC)
Expired
Jun 18, 2011, 10:15 PM CDT
In force
59 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

Counties Nowata County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 86 km from the middle of the area, began a volume at 02:17 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.

IssuedProductOfficeLasted
Jun 18, 6:03 PM CDTSevere Thunderstorm WatchSPC10 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 2.3 hours before the alert went out and 155 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-pSkew-T log-p diagram, Lamont, OK at 00:00Z on 2011-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3821 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lamont, OK at 00:00Z on 2011-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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.

321 
WUUS54 KTSA 190216
SVRTSA
OKC105-147-190315-
/O.NEW.KTSA.SV.W.0416.110619T0216Z-110619T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
916 PM CDT SAT JUN 18 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN NOWATA COUNTY IN NORTHEAST OKLAHOMA
  WASHINGTON COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1015 PM CDT

* AT 912 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 3 MILES NORTHEAST
  OF COPAN...MOVING EAST AT 15 MPH.

  STORM HAZARDS INCLUDE...
  DAMAGING GOLF BALL SIZE HAIL...
  DAMAGING WIND GUSTS TO 70 MPH...

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

***TORNADO WARNING IS ALSO IN EFFECT FOR NORTHERN WASHINGTON AND 
NORTHWESTERN NOWATA COUNTIES UNTIL 10 PM.***

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3700 9564 3681 9564 3684 9600 3700 9600
TIME...MOT...LOC 0216Z 269DEG 12KT 3694 9588

$$
2 follow-up statements
641 
WWUS54 KTSA 190247
SVSTSA

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

OKC105-147-190315-
/O.CON.KTSA.SV.W.0416.000000T0000Z-110619T0315Z/
NOWATA OK-WASHINGTON OK-
947 PM CDT SAT JUN 18 2011

...TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 PM FOR NORTHWEST 
NOWATA COUNTY...

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT 
FOR NORTHERN WASHINGTON AND NORTHWESTERN NOWATA COUNTIES...

AT 943 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WANN...MOVING
NORTHEAST AT 5 MPH.

STORM HAZARDS INCLUDE...
DAMAGING GOLF BALL SIZE HAIL...
DAMAGING WIND GUSTS TO 70 MPH...

THE WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED
COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3700 9564 3681 9564 3693 9593 3700 9596
TIME...MOT...LOC 0247Z 217DEG 6KT 3699 9580

$$
029 
WWUS54 KTSA 190301
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1001 PM CDT SAT JUN 18 2011

OKC147-190311-
/O.CAN.KTSA.SV.W.0416.000000T0000Z-110619T0315Z/
WASHINGTON OK-
1001 PM CDT SAT JUN 18 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN WASHINGTON COUNTY IS
CANCELLED...

LAT...LON 3700 9564 3681 9564 3688 9581 3694 9581
      3695 9579 3700 9579 3700 9578
TIME...MOT...LOC 0301Z 266DEG 12KT 3699 9573

$$

OKC105-190315-
/O.CON.KTSA.SV.W.0416.000000T0000Z-110619T0315Z/
NOWATA OK-
1001 PM CDT SAT JUN 18 2011

...TORNADO WARNING CONTINUES FOR NORTHERN NOWATA COUNTY UNTIL 1030 
PM CDT...

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR NORTHWESTERN NOWATA COUNTY...

AT 957 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES NORTHEAST
OF WANN...MOVING EAST AT 15 MPH.

STORM HAZARDS INCLUDE...
DAMAGING GOLF BALL SIZE HAIL...
DAMAGING WIND GUSTS TO 70 MPH...

THE WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED
COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3700 9564 3681 9564 3688 9581 3694 9581
      3695 9579 3700 9579 3700 9578
TIME...MOT...LOC 0301Z 266DEG 12KT 3699 9573

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 7:35 PM CDTTornado WarningTSAOsage40 min
Jun 18, 7:48 PM CDTSevere Thunderstorm WarningTSAOsage57 min
Jun 18, 8:04 PM CDTTornado WarningTSAOsage41 min
Jun 18, 8:33 PM CDTTornado WarningTSAOsage, Washington42 min
Jun 18, 8:37 PM CDTSevere Thunderstorm WarningTSAOsage, Washington38 min
Jun 18, 9:11 PM CDTTornado WarningTSANowata, Washington49 min
Jun 18, 9:37 PM CDTTornado WarningTSANowata43 min
Jun 18, 10:08 PM CDTSpecial Weather StatementTSAOsage37 min
Jun 19, 2:20 AM CDTSpecial Weather StatementTSANowata25 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2011Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.