Alert archive / Oklahoma / Special Weather Statements in 2011

Special Weather Statement, NWS Tulsa, OK

April 9, 2011Nowata County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Apr 9, 2011, 1:21 AM CDT for Nowata County, Oklahoma. It was in force for 54 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: Apr 9, 2011, 1:21 AM CDT (06:21 UTC)
Expired: Apr 9, 2011, 2:15 AM CDT
In force: 54 min
Issued by: NWS Tulsa, OK

County Nowata County, OK

The radar

The Tulsa radar (KINX), 81 km from the middle of the area, began a volume at 06:21 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 6.4 hours before the alert went out and 152 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: 1288 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 2309 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.2

Open this sounding in Storm Lab

The text

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

095 
WWUS84 KTSA 090621
SPSTSA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
121 AM CDT SAT APR 9 2011

OKZ056-057-090715-
CRAIG OK-NOWATA OK-
121 AM CDT SAT APR 9 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 215 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     NORTHWESTERN CRAIG AND NORTHERN NOWATA

AT 121 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES EAST OF
WANN...MOVING EAST AT 35 MPH. SOME LOCATIONS THAT WILL BE AFFECTED BY
THIS STORM INCLUDE...LENAPAH...WANN...HOLLOW AND SOUTH COFFEYVILLE.

THIS STORM WILL BE CAPABLE OF PRODUCING NICKEL SIZE HAIL AND WIND
GUSTS TO 50 MPH. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE
THE SIGNIFICANT WEATHER ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3681 9513 3682 9581 3695 9581 3695 9579
      3700 9579 3700 9511
TIME...MOT...LOC 0621Z 268DEG 29KT 3693 9569

$$

LACY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 7:08 PM CDT	Severe Thunderstorm Warning	TSA	Osage	34 min
Apr 8, 7:44 PM CDT	Special Weather Statement	TSA	Kay	31 min
Apr 8, 11:13 PM CDT	Severe Thunderstorm Warning	TSA	Osage	62 min
Apr 8, 11:26 PM CDT	Tornado Warning	TSA	Osage	34 min
Apr 8, 11:53 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	22 min
Apr 9, 12:16 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	59 min
Apr 9, 1:06 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Tulsa, Washington	39 min
Apr 9, 1:08 AM CDT	Special Weather Statement	TSA	Washington	37 min
Apr 9, 1:31 AM CDT	Severe Thunderstorm Warning	TSA	Rogers	59 min
Apr 9, 1:39 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	41 min
Apr 9, 1:55 AM CDT	Special Weather Statement	TSA	Washington	50 min
Apr 9, 2:10 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers	50 min
Apr 9, 2:14 AM CDT	Special Weather Statement	TSA	Nowata	46 min
Apr 9, 2:30 AM CDT	Special Weather Statement	TSA	Craig, Ottawa	60 min
Apr 9, 2:34 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata, Rogers	23 min
Apr 9, 2:56 AM CDT	Severe Thunderstorm Warning	TSA	Delaware	30 min
Apr 9, 3:45 AM CDT	Special Weather Statement	TSA	Benton	45 min
Apr 9, 4:15 AM CDT	Special Weather Statement	TSA	Carroll	30 min
Apr 9, 4:25 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll	39 min

Nearby

Special Weather Statements in Oklahoma, 2011 Every special weather statement 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.