Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 272, NWS Tulsa, OK

August 27, 2015Nowata County, Washington County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 27, 2015, 10:14 AM CDT for Nowata County, Washington County, Oklahoma. It was in force for 29 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: Aug 27, 2015, 10:14 AM CDT (15:14 UTC)
Expired: Aug 27, 2015, 10:43 AM CDT
In force: 29 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Nowata County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 77 km from the middle of the area, began a volume at 15:16 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
Aug 27, 10:20 AM CDT	HAIL 1	Dewey, OK

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 6 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 3.2 hours before the alert went out and 189 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: 1415 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

428 
WUUS54 KTSA 271514
SVRTSA
OKC105-147-271600-
/O.NEW.KTSA.SV.W.0272.150827T1514Z-150827T1600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1014 AM CDT THU AUG 27 2015

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL NOWATA COUNTY IN NORTHEASTERN OKLAHOMA...
  CENTRAL WASHINGTON COUNTY IN NORTHEASTERN OKLAHOMA...

* UNTIL 1100 AM CDT

* AT 1014 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR DEWEY...
  MOVING SOUTHEAST AT 15 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  BARTLESVILLE...DEWEY AND COPAN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3683 9600 3692 9591 3678 9574 3667 9593
TIME...MOT...LOC 1514Z 315DEG 12KT 3682 9589 

HAIL...1.00IN
WIND...60MPH
 
$$

2 follow-up statements

970 
WWUS54 KTSA 271530
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1030 AM CDT THU AUG 27 2015

OKC105-147-271600-
/O.CON.KTSA.SV.W.0272.000000T0000Z-150827T1600Z/
NOWATA OK-WASHINGTON OK-
1030 AM CDT THU AUG 27 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 AM CDT
FOR WEST CENTRAL NOWATA AND EAST CENTRAL WASHINGTON COUNTIES...

AT 1030 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 5 MILES EAST OF
DEWEY...MOVING SOUTHEAST AT 15 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING AND TREES. 

LOCATIONS IMPACTED INCLUDE...
BARTLESVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3681 9593 3686 9584 3678 9574 3670 9588
TIME...MOT...LOC 1530Z 315DEG 12KT 3678 9584 

HAIL...1.00IN
WIND...60MPH
 
$$

710 
WWUS54 KTSA 271543
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1043 AM CDT THU AUG 27 2015

OKC105-147-271553-
/O.CAN.KTSA.SV.W.0272.000000T0000Z-150827T1600Z/
NOWATA OK-WASHINGTON OK-
1043 AM CDT THU AUG 27 2015

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL NOWATA AND EAST
CENTRAL WASHINGTON COUNTIES IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE 
LIMITS. THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER GUSTY 
WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 3681 9593 3686 9584 3678 9574 3670 9588
TIME...MOT...LOC 1541Z 315DEG 12KT 3675 9580 

$$

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 27, 5:55 AM CDT, 4 hours 19 minutes earlier.

Area forecast discussion, Aug 27, 5:55 AM CDT, 4 hours 19 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
555 AM CDT THU AUG 27 2015

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG.

VFR conditions should prevail at all terminals through the period.
Thunderstorms ongoing this morning in SE KS will be near enough to
BVO/TUL/RVS to include a VCTS, but currently think they will stay
E of these terminals so will not include Tempo groups at this
time. May have to watch the NW AR terminals closely to see if any
TSRA mention becomes necessary, but will not include for now.

&&

.PREV DISCUSSION... /ISSUED 301 AM CDT THU AUG 27 2015/

DISCUSSION...
The bulk of the near-term model guidance suggests
shower/thunderstorm development across southeast Kansas over the
next few hours...with the activity expanding south into northeast
Oklahoma during the morning hours. This appears to be tied to
increasing isentropic lift...best seen on NAM 310-315K analysis.
Will have slight chances pops for the morning hours for now...but
will monitor for possible increase in PoPs and coverage.

Next upper wave currently moving across the northern Rockies will
push into the Plains later today...eventually bringing a weak
frontal boundary into parts of the area later Friday and Friday
night. Overall moisture is still expected to remain rather
limited...so have continued to keep PoPs generally in the 20-40%
range...with the best chances setting up for Friday night.

Mid-level heights rise a bit later this weekend...with
temperatures running near or just a bit above average going into
next week. A broad upper level low will likely develop along the
Gulf coast states...but it appears to be too far south to
significantly impact our weather.

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
AR...NONE.
&&

AVIATION...22

Hazardous weather outlook, Aug 27, 5:13 AM CDT, 5 hours 1 minute before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
513 AM CDT THU AUG 27 2015

ARZ001-002-010-011-019-020-029-OKZ049-053>076-281015-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
513 AM CDT THU AUG 27 2015

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...TODAY AND TONIGHT.

SEVERE THUNDERSTORM.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...SUNRISE.

DISCUSSION...
ISOLATED THUNDERSTORMS MAY DEVELOP EARLY THIS MORNING ACROSS PARTS
OF SOUTHEAST KANSAS AND DRIFT SOUTHWARD INTO PARTS OF NORTHEAST
OKLAHOMA. MOST OF THE ACTIVITY IS EXPECTED TO DISSIPATE BY EARLY
TO MID AFTERNOON. LATER TONIGHT...THUNDERSTORMS IN ADVANCE OF A
COLD FRONT MAY APPROACH AREAS NORTHWEST OF INTERSTATE 44. A
LIMITED RISK OF SEVERE HAIL WILL EXIST WITH PRIMARILY THE MORNING
STORMS.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
SPOTTER ACTIVATION NOT EXPECTED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.
FRIDAY AND SATURDAY...THUNDERSTORM POTENTIAL.
SUNDAY THROUGH WEDNESDAY...NO HAZARDS.

EXTENDED DISCUSSION...
A FEW THUNDERSTORMS MAY BE ONGOING FRIDAY MORNING ACROSS AREAS
NEAR THE KANSAS BORDER. SCATTERED ADDITIONAL THUNDERSTORMS ARE
EXPECTED TO DEVELOP FRIDAY NIGHT AND INTO SATURDAY MORNING AS THE
FRONT PASSES THROUGH EASTERN OKLAHOMA AND WESTERN ARKANSAS. THE
SEVERE WEATHER POTENTIAL WILL REMAIN LOW.

DRY AND WARMER WEATHER WILL PREVAIL FROM LATE IN THE WEEKEND INTO
NEXT WEEK AS AN UPPER LEVEL RIDGE BUILDS INTO THE CENTRAL UNITED
STATES.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

In the hours before

Special weather statement, Aug 27, 7:53 AM CDT, 2 hours 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
753 AM CDT THU AUG 27 2015

OKZ058-271330-
OTTAWA OK-
753 AM CDT THU AUG 27 2015

...SIGNIFICANT WEATHER ADVISORY FOR OTTAWA COUNTY UNTIL 830 AM CDT...

AT 752 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
TREECE...MOVING SOUTH AT 25 MPH.

NICKEL SIZE HAIL WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
MIAMI...COMMERCE...FAIRLAND...QUAPAW...WYANDOTTE...TREECE...PICHER...
NARCISSA...OTTAWA...PEORIA...CARDIN AND TWIN BRIDGES STATE PARK.

LAT...LON 3675 9462 3675 9500 3694 9500 3695 9499
      3700 9500 3700 9468
TIME...MOT...LOC 1252Z 357DEG 23KT 3704 9485

LACY

Special weather statement, Aug 27, 8:44 AM CDT, 1 hour 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
844 AM CDT THU AUG 27 2015

OKZ057-058-062-063-271430-
CRAIG OK-DELAWARE OK-OTTAWA OK-MAYES OK-
844 AM CDT THU AUG 27 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MAYES...SOUTHWESTERN
OTTAWA...NORTHWESTERN DELAWARE AND SOUTHEASTERN CRAIG COUNTIES UNTIL
930 AM CDT...

AT 844 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 5
MILES NORTHWEST OF CLEORA...MOVING SOUTH AT 30 MPH.

DIME SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
VINITA...AFTON...LANGLEY...BERNICE...KETCHUM...SPAVINAW...
BLUEJACKET...DISNEY...BIG CABIN...PENSACOLA...CLEORA...CHEROKEE STATE
PARK...SPAVINAW STATE PARK...CHLOETA...BERNICE STATE PARK AND STRANG.

LAT...LON 3692 9506 3666 9482 3632 9500 3648 9530
TIME...MOT...LOC 1344Z 019DEG 25KT 3664 9504

Special weather statement, Aug 27, 8:55 AM CDT, 1 hour 19 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
855 AM CDT THU AUG 27 2015

OKZ054>056-061-271445-
ROGERS OK-NOWATA OK-WASHINGTON OK-OSAGE OK-
855 AM CDT THU AUG 27 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL ROGERS...
NORTHEASTERN OSAGE...NOWATA AND NORTHERN WASHINGTON COUNTIES UNTIL
945 AM CDT...

AT 853 AM CDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES WEST OF CANEY TO 9
MILES EAST OF LENAPAH...AND MOVING SOUTH AT 25 MPH.

SMALL HAIL...WINDS TO 40 MPH AND TORRENTIAL RAINFALL WILL BE
POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
BARTLESVILLE...NOWATA...DEWEY...CHELSEA...SOUTH COFFEYVILLE...
COPAN...DELAWARE...LENAPAH...WANN...NEW ALLUWE...HULAH AND WATOVA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS.
DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3655 9544 3675 9610 3700 9607 3700 9543
TIME...MOT...LOC 1353Z 353DEG 22KT 3701 9600 3683 9547

Special weather statement, Aug 27, 10:11 AM CDT, 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1011 AM CDT THU AUG 27 2015

OKZ068-069-072-271600-
ADAIR OK-CHEROKEE OK-SEQUOYAH OK-
1011 AM CDT THU AUG 27 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SEQUOYAH...CHEROKEE
AND SOUTHWESTERN ADAIR COUNTIES UNTIL 1100 AM CDT...

AT 1010 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 3
MILES EAST OF TAHLEQUAH...MOVING SOUTH AT 35 MPH.

WIND GUSTS UP TO 40 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
TAHLEQUAH...BUNCH...COOKSON...ELDON...CHEROKEE LANDING STATE PARK...
PUMPKIN CENTER AND LAKE TENKILLER STATE PARK.

LAT...LON 3561 9475 3561 9513 3576 9513 3605 9503
      3607 9479
TIME...MOT...LOC 1510Z 000DEG 31KT 3590 9490

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 7:53 AM CDT	Special Weather Statement	TSA	Ottawa	37 min
Aug 27, 8:10 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	50 min
Aug 27, 8:44 AM CDT	Special Weather Statement	TSA	Craig	46 min
Aug 27, 8:55 AM CDT	Special Weather Statement	TSA	Nowata, Washington	50 min
Aug 27, 9:16 AM CDT	Areal Flood Advisory	TSA	Craig, Nowata, Osage, Washington	119 min
Aug 27, 10:11 AM CDT	Special Weather Statement	TSA	Cherokee	49 min
Aug 27, 10:42 AM CDT	Special Weather Statement	TSA	Sequoyah	33 min
Aug 27, 10:48 AM CDT	Flash Flood Warning	TSA	Nowata, Osage, Washington	3 hr
Aug 27, 11:00 AM CDT	Special Weather Statement	TSA	Rogers	30 min
Aug 27, 11:02 AM CDT	Special Weather Statement	TSA	Washington	28 min
Aug 27, 11:19 AM CDT	Special Weather Statement	TSA	Washington	26 min
Aug 27, 11:21 AM CDT	Special Weather Statement	TSA	Tulsa	24 min
Aug 27, 11:31 AM CDT	Areal Flood Advisory	TSA	Creek, Nowata, Osage, Rogers, Tulsa, Wagoner and 1 more	119 min
Aug 27, 11:43 AM CDT	Special Weather Statement	TSA	Tulsa	32 min
Aug 27, 11:44 AM CDT	Special Weather Statement	TSA	Rogers	31 min
Aug 27, 12:08 PM CDT	Flash Flood Warning	TSA	Rogers, Tulsa, Wagoner, Washington	3 hr
Aug 27, 12:12 PM CDT	Special Weather Statement	TSA	Washington	48 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2015 Every severe thunderstorm warning in 2015

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.