Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 56, NWS Tulsa, OK

April 11, 2016Pawnee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 11, 2016, 12:59 AM CDT for Pawnee County, Oklahoma. It was in force for 17 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 11, 2016, 12:59 AM CDT (05:59 UTC)
Expired: Apr 11, 2016, 1:16 AM CDT
In force: 17 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Pawnee County, OK

The radar

The Tulsa radar (KINX), 103 km from the middle of the area, began a volume at 06:03 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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

Norman, OK (KOUN), launched 00:00Z, 6.0 hours before the alert went out and 135 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: 2443 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1418 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 166 m²/s²
0-3 km storm-relative helicity: 243 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 13.4

Open this sounding in Storm Lab

The text

As transmitted.

225 
WUUS54 KTSA 110559
SVRTSA
OKC117-110645-
/O.NEW.KTSA.SV.W.0056.160411T0559Z-160411T0645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1259 AM CDT MON APR 11 2016

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN PAWNEE COUNTY IN NORTHEASTERN OKLAHOMA...

* UNTIL 145 AM CDT

* AT 1259 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 4 MILES NORTHWEST
  OF QUAY...MOVING NORTHEAST AT 15 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  PAWNEE...                         BLACKBURN...
  MARAMEC...                        SKEDEE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3645 9680 3635 9654 3634 9657 3632 9657
      3630 9656 3629 9654 3616 9665 3616 9682
      3624 9682 3625 9684 3625 9687
TIME...MOT...LOC 0559Z 204DEG 14KT 3620 9677 

HAIL...<.75IN
WIND...60MPH
 
$$

1 follow-up statement

171 
WWUS54 KTSA 110616
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
116 AM CDT MON APR 11 2016

OKC117-110625-
/O.CAN.KTSA.SV.W.0056.000000T0000Z-160411T0645Z/
PAWNEE OK-
116 AM CDT MON APR 11 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN PAWNEE COUNTY IS
CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER GUSTY WINDS TO
40 MPH ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 3645 9680 3635 9654 3634 9657 3632 9657
      3630 9656 3629 9654 3616 9665 3616 9682
      3624 9682 3625 9684 3625 9687
TIME...MOT...LOC 0614Z 204DEG 14KT 3626 9674 

$$

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 Apr 10, 11:48 PM CDT, 1 hour 11 minutes earlier.

Area forecast discussion, Apr 10, 11:48 PM CDT, 1 hour 11 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE Tulsa OK
1148 PM CDT SUN APR 10 2016

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG.
VFR TO MVFR CONDITIONS ARE EXPECTED AT MOST AREA TAF SITES
THROUGH THE VALID PERIOD WITH SEVERAL ROUNDS OF SHOWERS AND
THUNDERSTORMS EXPECTED ACROSS THE AREA DURING THE FORECAST
PERIOD. COULD SEE IFR CONDITIONS WITH THE STRONGER STORMS.

&&

.PREV DISCUSSION... /ISSUED 726 PM CDT SUN APR 10 2016/

DISCUSSION...
Storms have erupted over northeast Oklahoma this evening from
Pawnee county into northern Washington county. This is in advance
of the Cold front that is currently across northwest Oklahoma into
southeast Kansas. This is in area where the cap has eroded with
cape in the 2000 J/KG range. These storms will likely produce large
hail to the size of limes and wind gusts to around 70 mph. There is
also the potential for these storms to gain some rotation. Additional
storms are expected to move into the region from western Oklahoma later
this evening and from the northwest along the cold front. In addition
to the severe potential, heavy rain is possible with localized flooding.

TSA Watches/Warnings/Advisories...
OK...NONE.
AR...NONE.

AVIATION...10

Hazardous weather outlook, Apr 10, 4:55 PM CDT, 8 hours 4 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
455 PM CDT SUN APR 10 2016

ARZ001-002-010-011-019-020-029-OKZ049-053>076-111030-
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-
455 PM CDT SUN APR 10 2016

...SEVERE WEATHER THREAT INCREASES THIS EVENING AND CONTINUES INTO MONDAY...

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

.DAY ONE...TODAY AND TONIGHT.
TORNADO.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...THIS EVENING.

SEVERE THUNDERSTORM.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND WESTERN ARKANSAS.
	ONSET...THIS EVENING.

	AREA AT GREATEST RISK...NORTHEAST OKLAHOMA .

FLASH FLOOD.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...TONIGHT.

HEAVY RAIN.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...TONIGHT.

DISCUSSION...
AN ELEVATED SEVERE THUNDERSTORM POTENTIAL WILL EXIST THIS EVENING
AND OVERNIGHT...PRIMARILY ACROSS PORTIONS OF NORTHEAST OKLAHOMA
ALONG AND TO THE NORTHWEST OF INTERSTATE 44. THUNDERSTORMS ARE
EXPECTED TO DEVELOP THIS EVENING ALONG AN APPROACHING COLD
FRONT...AND EXPAND IN COVERAGE TONIGHT AS A LOW LEVEL JET
STRENGTHENS. THUNDERSTORMS TONIGHT MOST LIKELY WILL BE ELEVATED
...LEADING TO LARGE HAIL POTENTIALLY TO THE SIZE OF TENNIS BALLS.
HOWEVER...A LOW POTENTIAL FOR DAMAGING WIND GUSTS IN THE 60 TO 70
MPH RANGE AND ISOLATED TORNADOES EXISTS AS WELL. LOCALLY HEAVY
RAINFALL COULD LEAD TO FLASH FLOODING AS WELL...ESPECIALLY IN
FLOOD PRONE AREAS.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
ACTIVATION OF THE REGIONAL SPOTTER NETWORK EXPECTED.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
MONDAY...SEVERE THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL.
TUESDAY THROUGH FRIDAY...NO HAZARDS.
SATURDAY...THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL.

EXTENDED DISCUSSION...
THUNDERSTORMS LIKELY WILL BE ONGOING MONDAY MORNING ACROSS PORTIONS OF
NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS...WITH AT MOST...ISOLATED
SEVERE WEATHER LIKELY OCCURRING AT THAT TIME. ADDITIONAL THUNDERSTORM
DEVELOPMENT IS EXPECTED ACROSS SOUTHERN OKLAHOMA AND INTO WEST
CENTRAL ARKANSAS DURING THE AFTERNOON HOURS MONDAY...AND WILL ALSO
CARRY AN ELEVATED RISK OF SEVERE WEATHER. LARGE HAIL AND DAMAGING
WINDS WILL BE THE PRIMARY SEVERE WEATHER THREATS...ALTHOUGH A
SMALL TORNADO THREAT WILL EXIST WITH ANY THUNDERSTORMS THAT
DEVELOP WELL AHEAD OF THE COLD FRONT. THE BULK OF THE THUNDERSTORM
ACTIVITY SHOULD BE SOUTH AND EAST OF THE REGION BY EARLY TUESDAY
MORNING.

QUIET WEATHER WILL THEN PREVAIL FOR THE REMAINDER OF THE UPCOMING
WORK WEEK...WITH THE NEXT NOTABLE STORM SYSTEM SET TO IMPACT THE
REGION NEXT WEEKEND.
EMERGENCY MANAGEMENT PLANNING STATEMENT...

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

In the hours before

Local storm report, Apr 10, 9:01 PM CDT, 3 hours 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
901 PM CDT SUN APR 10 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0847 PM     HAIL             DEWEY                   36.80N 95.94W
04/10/2016  E0.88 INCH       WASHINGTON         OK   TRAINED SPOTTER

&&

RJS

Local storm report, Apr 10, 9:02 PM CDT, 3 hours 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
902 PM CDT SUN APR 10 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0840 PM     HAIL             3 NE BARTLESVILLE       36.78N 95.94W
04/10/2016  E1.75 INCH       WASHINGTON         OK   EMERGENCY MNGR

&&

PBS

Local storm report, Apr 10, 9:49 PM CDT, 3 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
949 PM CDT SUN APR 10 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0939 PM     NON-TSTM WND GST PAWNEE                  36.34N 96.80W
04/10/2016  E60 MPH          PAWNEE             OK   BROADCAST MEDIA

&&

RJS

Local storm report, Apr 10, 9:53 PM CDT, 3 hours 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
953 PM CDT SUN APR 10 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0945 PM     TSTM WND GST     FORAKER                 36.87N 96.57W
04/10/2016  M62 MPH          OSAGE              OK   MESONET

&&

RJS

Local storm report, Apr 10, 10:21 PM CDT, 2 hours 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1021 PM CDT SUN APR 10 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0938 PM     HAIL             SOUTH COFFEYVILLE       36.99N 95.62W
04/10/2016  E1.00 INCH       NOWATA             OK   PUBLIC

&&

RJS

Special weather statement, Apr 10, 10:43 PM CDT, 2 hours 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1043 PM CDT SUN APR 10 2016

OKZ056-057-110430-
CRAIG OK-NOWATA OK-
1043 PM CDT SUN APR 10 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN NOWATA AND CRAIG
COUNTIES UNTIL 1130 PM CDT...

AT 1043 PM CDT...STRONG THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 3 MILES SOUTHWEST OF EDNA TO 5 MILES EAST OF NOWATA...
AND MOVING EAST AT 50 MPH.

WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THESE STORMS.

LOCATIONS IN OR NEAR THE PATH INCLUDE...
WELCH...                          BLUEJACKET...
PYRAMID CORNERS...                HOLLOW...
CENTRAILIA...                     CENTRALIA...

THIS INCLUDES INTERSTATE 44 BETWEEN MILE MARKERS 290 AND 293.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR
NORTHEASTERN OKLAHOMA.

LAT...LON 3699 9504 3698 9503 3697 9504 3695 9500
      3667 9500 3670 9557 3700 9550 3700 9501
TIME...MOT...LOC 0343Z 269DEG 44KT 3703 9541 3671 9554

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 7:06 PM CDT	Special Weather Statement	TSA	Osage	39 min
Apr 10, 7:11 PM CDT	Severe Thunderstorm Warning	TSA	Osage	49 min
Apr 10, 7:17 PM CDT	Special Weather Statement	TSA	Nowata	43 min
Apr 10, 7:22 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	38 min
Apr 10, 7:57 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Washington	33 min
Apr 10, 7:58 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Washington	47 min
Apr 10, 8:43 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	47 min
Apr 10, 9:11 PM CDT	Severe Thunderstorm Warning	TSA	Osage	49 min
Apr 10, 9:34 PM CDT	Severe Thunderstorm Warning	TSA	Osage	56 min
Apr 10, 10:00 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	45 min
Apr 10, 10:43 PM CDT	Special Weather Statement	TSA	Craig	47 min
Apr 11, 12:47 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	43 min
Apr 11, 1:19 AM CDT	Special Weather Statement	TSA	McIntosh, Okmulgee	41 min
Apr 11, 1:34 AM CDT	Severe Thunderstorm Warning	TSA	Creek	26 min
Apr 11, 1:39 AM CDT	Special Weather Statement	TSA	Tulsa	36 min
Apr 11, 1:47 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Pawnee	28 min
Apr 11, 2:02 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Tulsa	43 min
Apr 11, 2:27 AM CDT	Special Weather Statement	TSA	Pushmataha	48 min
Apr 11, 3:23 AM CDT	Special Weather Statement	TSA	LeFlore	37 min
Apr 11, 7:39 AM CDT	Special Weather Statement	TSA	Choctaw	36 min
Apr 11, 8:02 AM CDT	Special Weather Statement	TSA	Pushmataha	13 min
Apr 11, 8:17 AM CDT	Special Weather Statement	TSA	Choctaw	28 min
Apr 11, 8:45 AM CDT	Special Weather Statement	TSA	Pushmataha	30 min
Apr 11, 8:49 AM CDT	Special Weather Statement	TSA	Pushmataha	26 min
Apr 11, 2:28 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	32 min
Apr 11, 2:57 PM CDT	Special Weather Statement	TSA	Pushmataha	48 min
Apr 11, 3:12 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	48 min
Apr 11, 3:14 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	16 min
Apr 11, 3:58 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	32 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2016 Every severe thunderstorm warning in 2016

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.