Alert archive / Oklahoma / Special Weather Statements in 2015

Special Weather Statement, NWS Tulsa, OK

April 9, 2015Haskell County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Apr 9, 2015, 4:37 PM CDT for Haskell County, Oklahoma. It was in force for 23 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, 2015, 4:37 PM CDT (21:37 UTC)
Expired: Apr 9, 2015, 5:00 PM CDT
In force: 23 min
Issued by: NWS Tulsa, OK

County Haskell County, OK

The radar

The Western Arkansas radar (KSRX), 56 km from the middle of the area, began a volume at 21:37 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 12:00Z, 9.6 hours before the alert went out and 220 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: 950 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 857 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 275 m²/s²
0-3 km storm-relative helicity: 270 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 6.3

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 9, 2:27 PM CDT, 2 hours 10 minutes earlier.

Area forecast discussion, Apr 9, 2:27 PM CDT, 2 hours 10 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
227 PM CDT THU APR 9 2015

.DISCUSSION...

COLD FRONT IS QUICKLY SWEEPING EAST ACROSS THE FORECAST AREA THIS
AFTERNOON...IN ASSOCIATION WITH A PV MAX MOVING EAST NORTHEAST
ACROSS NEBRASKA AND KANSAS. A STRONG CAPPING INVERSION REMAINS IN
PLACE AHEAD OF THE FRONT...AND THUS FAR ECHOES HAVE STRUGGLED TO
GET GOING. HOWEVER...EVENTUALLY LIFT AND HEATING SHOULD OVERCOME
THE CAP AND AT LEAST SCATTERED STORMS WILL FIRE ALONG THE FRONT BY
MID AFTERNOON FROM NW AR DOWN INTO SE OK. THE STORMS MAY
EVENTUALLY BECOME MORE LINEAR WITH TIME. WINDS ALOFT AT THE BASE
OF THE CENTRAL CONUS TROUGH SUGGEST SHEAR IS STRONG ENOUGH FOR
SUPERCELL DEVELOPMENT INITIALLY AT LEAST. THE TORNADO
THREAT...WHILE NOT ZERO...IS MUCH LESS COMPARED TO
YESTERDAY...WITH VEERED FLOW IN THE WARM SECTOR SHRINKING
HELICITY. THUS MAIN THREATS WILL BE HAIL/WINDS. ACTIVITY SHOULD BE
CLEARING THE AREA BETWEEN 00Z AND 03Z...WITH A CLEAR AND COOL
NIGHT FORTHCOMING.

AFTER A NICE DAY TO BE OUTDOORS ON FRIDAY...RAIN/STORM CHANCES
WILL RETURN BY SATURDAY...ESPECIALLY SATURDAY NIGHT AS THE
RETREATING BOUNDARY LIFTS NORTH THRU THE PLAINS. A WAVE IN THE
NORTHERN STREAM WILL SWEEP ACROSS THE MIDWEST BY THE LATTER PART
OF THE WEEKEND...FORCING ANOTHER BOUNDARY DOWN INTO OUR REGION.

GOING INTO EARLY NEXT WEEK...AN UPPER WAVE IN THE WEAKER SOUTHERN
STREAM OF THE WESTERLIES WILL LIFT INTO THE PLAINS...BRINGING GOOD
CHANCES FOR RAIN/STORMS.

A VIGOROUS UPPER STORM SYSTEM IS FORECAST TO DIVE IN FROM THE
PAC NW AND CLOSE OFF OVER THE PLAINS LATE NEXT WEEK. DEPENDING ON
HOW THE DETAILS SHAKE OUT...THERE WOULD BE SOME SEVERE POTENTIAL
AHEAD OF THE ASSOCIATED FRONT...FOLLOWED BY SOME COOLER AND DRIER
WEATHER TO CLOSE OUT THE WEEK.

LACY

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   42  69  48  73 /   0   0  10  20
FSM   47  72  49  75 /  40   0  10  10
MLC   46  70  48  72 /  10   0  10  30
BVO   39  69  44  73 /   0   0  10  10
FYV   40  67  45  69 /  20   0   0  10
BYV   42  67  45  71 /  20   0   0  10
MKO   44  69  48  73 /  10   0  10  20
MIO   39  69  45  71 /   0   0  10  10
F10   45  69  49  72 /   0   0  10  20
HHW   49  71  48  71 /  40   0  10  30

&&

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

LONG TERM....30

Hazardous weather outlook, Apr 9, 12:51 PM CDT, 3 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
1251 PM CDT THU APR 9 2015

ARZ001-002-010-011-019-020-029-OKZ049-053>076-101045-
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-
1251 PM CDT THU APR 9 2015

...SEVERE THUNDERSTORMS POSSIBLE THIS AFTERNOON ACROSS
PORTIONS OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS...

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...PORTIONS OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...1 TO 3 PM.

SEVERE THUNDERSTORM.
	RISK...ELEVATED.
	AREA...PORTIONS OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...1 TO 3 PM.

SIGNIFICANT WINDS.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA AND WESTERN ARKANSAS.
	ONSET...ONGOING.

DISCUSSION...
EARLY THIS AFTERNOON....A COLD FRONT EXTENDED FROM NEAR VINITA TO
OKMULGEE. THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THIS COLD
FRONT BY MID-AFTERNOON ACROSS EASTERN OKLAHOMA INTO NORTHWEST
ARKANSAS. SOME OF THESE THUNDERSTORMS ARE EXPECTED TO BECOME SEVERE
AS THE AIRMASS AHEAD OF THE FRONT IS MOIST AND UNSTABLE. LARGE HAIL
AND WIND GUSTS TO AROUND 65 MPH WILL BE THE MAIN CONCERN. THERE WILL
ALSO BE ENOUGH LOW LEVEL WIND SHEAR FOR A LIMITED TORNADO THREAT. THE
THUNDERSTORMS ARE EXPECTED TO MOVE OUT OF THE AREA BY EARLY EVENING.

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

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.
FRIDAY AND SATURDAY...THUNDERSTORM POTENTIAL.
SUNDAY...SEVERE THUNDERSTORM POTENTIAL.
MONDAY THROUGH WEDNESDAY...THUNDERSTORM POTENTIAL.

EXTENDED DISCUSSION...
FRIDAY SHOULD BE A LITTLE COOLER AND DRY...ALTHOUGH THERE IS A SLIM
CHANCE OF THUNDERSTORMS LATE FRIDAY NIGHT ACROSS SOUTHEAST OKLAHOMA.
THUNDERSTORM CHANCES WILL REMAIN IN THE FORECAST THROUGH THE
WEEKEND...WITH BETTER CHANCES EARLY NEXT WEEK AS AN UPPER LEVEL LOW
MOVES INTO THE SOUTHERN PLAINS.

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

In the hours before

Local storm report, Apr 9, 4:16 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
416 PM CDT THU APR 09 2015

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

0414 PM     HAIL             2 SSW JOHNSON           36.11N 94.18W
04/09/2015  E1.00 INCH       WASHINGTON         AR   STORM CHASER

&&

SFP

Local storm report, Apr 9, 4:17 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
417 PM CDT THU APR 09 2015

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

0339 PM     TSTM WND DMG     10 WSW STILWELL         35.76N 94.79W
04/09/2015                   ADAIR              OK   EMERGENCY MNGR

            SEVERAL TREES DOWN JUST EAST OF CHEROKEE ADAIR COUNTY
            LINE ON HIGHWAY 100

&&

JBM

Local storm report, Apr 9, 4:18 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
418 PM CDT THU APR 09 2015

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

0337 PM     TSTM WND DMG     7 NE COOKSON            35.78N 94.83W
04/09/2015                   CHEROKEE           OK   EMERGENCY MNGR

            SEVERAL TREES DOWN WEST OF CHEROKEE ADAIR COUNTY LINE ON
            HIGHWAY 100

&&

JBM

Local storm report, Apr 9, 4:20 PM CDT, 17 minutes before

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Special weather statement, Apr 9, 4:32 PM CDT, 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
432 PM CDT THU APR 9 2015

OKZ073-075-092200-
LATIMER OK-PITTSBURG OK-
432 PM CDT THU APR 9 2015

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 500 PM CDT
FOR THE FOLLOWING COUNTIES...

IN SOUTHEAST OKLAHOMA
     CENTRAL PITTSBURG AND NORTHWESTERN LATIMER

AT 432 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES NORTH OF
BLANCO...MOVING EAST AT 50 MPH. SOME LOCATIONS THAT WILL BE AFFECTED
BY THIS STORM INCLUDE...WILBURTON...HIGGINS...DAMON...GOWEN...
BLANCO...HARTSHORNE...HAILEYVILLE...DOW...BACHE...ALDERSON AND
ROBBERS CAVE STATE PARK.

THIS STORM WILL BE CAPABLE OF PRODUCING PENNY SIZE HAIL AND WIND
GUSTS TO 40 MPH.

LAT...LON 3484 9584 3506 9532 3505 9528 3480 9522
      3473 9580
TIME...MOT...LOC 2132Z 253DEG 44KT 3482 9571

Special weather statement, Apr 9, 4:37 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
437 PM CDT THU APR 9 2015

OKZ074>076-092200-
HASKELL OK-LATIMER OK-LE FLORE OK-
437 PM CDT THU APR 9 2015

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 500 PM CDT
FOR THE FOLLOWING COUNTIES...

IN SOUTHEAST OKLAHOMA
     SOUTHEASTERN HASKELL...NORTHERN LE FLORE AND NORTHEASTERN
     LATIMER

AT 437 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES EAST OF
KINTA...MOVING EAST AT 45 MPH. SOME LOCATIONS THAT WILL BE AFFECTED
BY THIS STORM INCLUDE...MCCURTAIN...LEQUIRE...KINTA...KEOTA...MILTON
AND BOKOSHE.

THIS STORM WILL BE CAPABLE OF PRODUCING PENNY SIZE HAIL AND WIND
GUSTS TO 40 MPH.

LAT...LON 3529 9476 3500 9473 3503 9527 3519 9526
TIME...MOT...LOC 2137Z 267DEG 37KT 3513 9513

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 12:08 AM CDT	Special Weather Statement	TSA	Osage	37 min
Apr 9, 12:39 AM CDT	Special Weather Statement	TSA	Osage	51 min
Apr 9, 2:28 PM CDT	Special Weather Statement	TSA	Delaware	32 min
Apr 9, 2:34 PM CDT	Special Weather Statement	TSA	Delaware	26 min
Apr 9, 2:42 PM CDT	Special Weather Statement	TSA	Cherokee	33 min
Apr 9, 2:52 PM CDT	Special Weather Statement	TSA	Cherokee, Muskogee	38 min
Apr 9, 3:02 PM CDT	Special Weather Statement	TSA	Adair	28 min
Apr 9, 3:19 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	41 min
Apr 9, 3:31 PM CDT	Severe Thunderstorm Warning	TSA	Adair	44 min
Apr 9, 3:36 PM CDT	Special Weather Statement	TSA	Latimer	39 min
Apr 9, 3:40 PM CDT	Special Weather Statement	TSA	Haskell	50 min
Apr 9, 3:46 PM CDT	Severe Thunderstorm Warning	TSA	Adair	44 min
Apr 9, 4:19 PM CDT	Severe Thunderstorm Warning	TSA	Adair	41 min
Apr 9, 4:32 PM CDT	Special Weather Statement	TSA	Latimer	28 min
Apr 9, 4:51 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg	39 min
Apr 9, 4:58 PM CDT	Special Weather Statement	TSA	Sequoyah	32 min
Apr 9, 5:08 PM CDT	Special Weather Statement	TSA	Latimer	37 min
Apr 9, 5:29 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore	46 min
Apr 9, 5:36 PM CDT	Special Weather Statement	TSA	Pushmataha	39 min
Apr 9, 6:10 PM CDT	Special Weather Statement	TSA	Pushmataha	35 min
Apr 9, 6:17 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	43 min
Apr 9, 6:33 PM CDT	Special Weather Statement	TSA	Choctaw	27 min
Apr 9, 6:40 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	35 min
Apr 9, 3:33 PM CDT	Special Weather Statement	TSA	Benton	42 min
Apr 9, 3:43 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll	15 min
Apr 9, 4:07 PM CDT	Severe Thunderstorm Warning	TSA	Madison, Washington	53 min
Apr 9, 4:38 PM CDT	Special Weather Statement	TSA	Madison	37 min
Apr 9, 4:43 PM CDT	Special Weather Statement	TSA	Carroll	32 min
Apr 9, 4:45 PM CDT	Severe Thunderstorm Warning	TSA	Madison, Washington	45 min
Apr 9, 4:53 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Madison, Washington	41 min
Apr 9, 4:54 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Madison	22 min
Apr 9, 5:19 PM CDT	Special Weather Statement	TSA	Crawford, Franklin	26 min
Apr 9, 5:42 PM CDT	Severe Thunderstorm Warning	TSA	Franklin	14 min

Nearby

Special Weather Statements in Oklahoma, 2015 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.