Alert archive / Oklahoma / Special Weather Statements in 2016

Special Weather Statement, NWS Tulsa, OK

September 8, 2016Ottawa County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Sep 8, 2016, 8:03 PM CDT for Ottawa County, Oklahoma. It was in force for 27 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: Sep 8, 2016, 8:03 PM CDT (01:03 UTC)
Expired: Sep 8, 2016, 8:30 PM CDT
In force: 27 min
Issued by: NWS Tulsa, OK

County Ottawa County, OK

The radar

The Tulsa radar (KINX), 79 km from the middle of the area, began a volume at 01:05 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, 1.1 hours before the alert went out and 103 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: 425 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 1214 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 220 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

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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 Sep 8, 6:42 PM CDT, 1 hour 21 minutes earlier.

Area forecast discussion, Sep 8, 6:42 PM CDT, 1 hour 21 minutes before

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Hazardous weather outlook, Sep 8, 5:03 PM CDT, 3 hours before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
503 PM CDT THU SEP 8 2016

ARZ001-002-010-011-019-020-029-OKZ049-053>076-091045-
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-
503 PM CDT THU SEP 8 2016

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SEVERE THUNDERSTORM.
	RISK...LIMITED.
 	AREA...NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.
 	ONSET...ONGOING...THREAT WANES AFTER MIDNIGHT TONIGHT.

FLASH FLOOD.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ONGOING.

HEAVY RAIN.
	RISK...ELEVATED.
	AREA...NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.
	ONSET...ONGOING.

DANGEROUS HEAT.
	RISK...ELEVATED.
	AREA...ALONG AND SOUTH OF HIGHWAY 412 AND WEST OF HIGHWAY 69
			IN EASTERN OKLAHOMA.
	ONSET...ONGOING.

DISCUSSION...

DANGEROUS AFTERNOON HEAT INDICES IN THE 105 TO 110 DEGREE RANGE
ACROSS PORTIONS OF EASTERN OKLAHOMA WILL CONTINUE THRU SUNSET.

SCATTERED SHOWERS AND THUNDERSTORMS WILL AFFECT PORTIONS OF
NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS THRU THE AFTERNOON AND
EVENING HOURS...WITH THE GREATEST CONCENTRATION NEAR THE KANSAS
AND MISSOURI BORDERS. STORMS THAT TRAIN OVER THE SAME AREAS WILL
PRODUCE LOCALLY HEAVY RAINFALL AND POSSIBLE FLASH FLOODING. IN
ADDITION...STORMS COULD ORGANIZE INTO SMALL CLUSTERS AND COULD
PRODUCE POCKETS OF DAMAGING WIND. THIS THREAT WILL WANE AS WE MOVE
INTO THE EVENING HOURS...AND SHOULD BE DONE BY MIDNIGHT.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
LOCAL SPOTTER ACTIVATION MAY BE NEEDED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.
FRIDAY...THUNDERSTORM POTENTIAL...DANGEROUS HEAT POTENTIAL...HEAVY RAIN
			POTENTIAL.
SATURDAY...THUNDERSTORM POTENTIAL.
SUNDAY...NO HAZARDS.
MONDAY THRU WEDNESDAY...THUNDERSTORM POTENTIAL.

EXTENDED DISCUSSION...

ANOTHER DAY OF POTENTIALLY DANGEROUS AFTERNOON HEAT INDICES IS
FORECAST ACROSS NORTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS ON
FRIDAY AHEAD OF A STRONG COLD FRONT.

ASIDE FROM SOME MORNING HIGH BASED SHOWERS AND STORMS...THE BULK
OF THE STORM ACTIVITY WILL BE ASSOCIATED WITH A STRONG COLD FRONT
AS IT MOVES INTO NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS FRIDAY
EVENING AND INTO SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS
AFTER MIDNIGHT FRIDAY NIGHT. DAMAGING WINDS AND LOCALLY HEAVY RAIN
WILL BE THE PRIMARY THREATS WITH THIS ACTIVITY.

AFTER A RELATIVELY QUIET WEEKEND...THUNDERSTORM POTENTIAL WILL
INCREASE AGAIN TOWARD THE MIDDLE OF NEXT WEEK AHEAD OF THE NEXT
UPPER STORM SYSTEM AND ASSOCIATED FRONT.

WWW.WEATHER.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

LACY

In the hours before

Special weather statement, Sep 8, 6:42 PM CDT, 1 hour 21 minutes before

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Special weather statement, Sep 8, 7:34 PM CDT, 29 minutes before

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Local storm report, Sep 8, 7:47 PM CDT, 16 minutes before

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Local storm report, Sep 8, 7:49 PM CDT, 14 minutes before

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Local storm report, Sep 8, 7:50 PM CDT, 13 minutes before

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Special weather statement, Sep 8, 8:03 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 7:34 PM CDT	Special Weather Statement	TSA	Craig	26 min
Sep 8, 8:25 PM CDT	Special Weather Statement	TSA	Ottawa	35 min
Sep 8, 8:48 PM CDT	Flash Flood Warning	TSA	Craig, Delaware, Ottawa	4 hr
Sep 9, 5:38 AM CDT	Special Weather Statement	TSA	Mayes	52 min
Sep 9, 8:37 AM CDT	River Flood Warning	TSA	Ottawa	5 days
Sep 8, 7:05 PM CDT	Flash Flood Warning	TSA	Carroll, Madison	4 hr

Nearby

Special Weather Statements in Oklahoma, 2016 Every special weather statement 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.