Alert archive / Oklahoma / Special Weather Statements in 2018

Special Weather Statement, NWS Tulsa, OK

August 29, 2018Okmulgee County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Aug 29, 2018, 7:22 PM CDT for Okmulgee County, Oklahoma. It was in force for 53 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: Aug 29, 2018, 7:22 PM CDT (00:22 UTC)
Expired: Aug 29, 2018, 8:15 PM CDT
In force: 53 min
Issued by: NWS Tulsa, OK

County Okmulgee County, OK

The radar

The Tulsa radar (KINX), 57 km from the middle of the area, began a volume at 00:24 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, 0.4 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: 1214 J/kg
Mixed-layer CIN: -166 J/kg
Mixed-layer LCL: 766 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 Aug 29, 6:50 PM CDT, 32 minutes earlier.

Area forecast discussion, Aug 29, 6:50 PM CDT, 32 minutes before

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Hazardous weather outlook, Aug 29, 5:14 PM CDT, 2 hours 8 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
514 PM CDT Wed Aug 29 2018

ARZ001-002-010-011-019-020-029-OKZ049-053>076-301000-
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-
514 PM CDT Wed Aug 29 2018

This Outlook is for Northwest and West Central Arkansas as well as
much of Eastern Oklahoma.

.DAY ONE...Tonight.

SEVERE THUNDERSTORM.
	RISK...Limited.
	AREA...Mainly south of Interstate 44.
	ONSET...Ongoing.

DANGEROUS HEAT.
	RISK...Limited.
	AREA...East Central and Southeast Oklahoma and West Central Arkansas.
	ONSET...Ongoing.

DISCUSSION...
Scattered showers and thunderstorms will continue into early this
evening near a weak frontal boundary extending from northwest
Arkansas into east central Oklahoma. A few of these storms may be
strong to severe until around sunset, with damaging winds being
the main threat. Additional showers and storms may develop later
tonight as the low level jet strengthens.

Heat index values between 100 and 105 degrees will continue until
around sunset across parts of east central and southeast Oklahoma
and west central Arkansas.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Activation of the Regional Spotter Network Likely.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
THURSDAY...Thunderstorm Potential.
FRIDAY...High Wind Potential.
SATURDAY...No Hazards.
SUNDAY through TUESDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
The front will lift back north on Thursday, with the best
potential for thunderstorms across northeast Oklahoma and
western Arkansas. Dry conditions are forecast for most of the
weekend, with a return to hot and humid conditions through
Sunday. There is a chance for more scattered storms late Sunday
through Tuesday.

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, Aug 29, 5:12 PM CDT, 2 hours 10 minutes before

Special Weather Statement
National Weather Service Tulsa OK
512 PM CDT WED AUG 29 2018

OKZ068-069-072-292245-
Adair OK-Sequoyah OK-Cherokee OK-
512 PM CDT WED AUG 29 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SEQUOYAH...
SOUTHWESTERN ADAIR AND SOUTHEASTERN CHEROKEE COUNTIES UNTIL 545 PM
CDT...

At 511 PM CDT, strong thunderstorms were located along a line
extending from Cookson to near Vian. These storms were nearly
stationary.

Wind gusts up to 50 mph will be possible with these storms.

Locations in or near the path include...
Vian...                           Marble City...
Cookson...                        Cherokee Landing State Park...
Bunch...                          Lake Tenkiller State Park...
Box...

This includes Interstate 40 in Oklahoma between mile markers 293 and
298.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3542 9497 3562 9513 3564 9513 3583 9493
      3570 9469
TIME...MOT...LOC 2211Z 297DEG 2KT 3572 9491 3552 9497

Special weather statement, Aug 29, 5:46 PM CDT, 1 hour 36 minutes before

Special Weather Statement
National Weather Service Tulsa OK
546 PM CDT WED AUG 29 2018

OKZ068-070-072-292330-
Muskogee OK-Sequoyah OK-Cherokee OK-
546 PM CDT WED AUG 29 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SEQUOYAH...SOUTH
CENTRAL CHEROKEE AND EAST CENTRAL MUSKOGEE COUNTIES UNTIL 630 PM
CDT...

At 545 PM CDT, strong thunderstorms were located along a line
extending from 4 miles southwest of Cookson to 3 miles southeast of
Webbers Falls. These storms were nearly stationary.

Wind gusts up to 50 mph will be possible with these storms.

Locations in or near the path include...
Vian...                           Gore...
Webbers Falls...                  Lake Tenkiller State Park...
Box...

This includes Interstate 40 in Oklahoma between mile markers 284 and
295.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3543 9502 3545 9502 3546 9505 3543 9508
      3543 9523 3569 9504 3567 9486
TIME...MOT...LOC 2245Z 060DEG 3KT 3565 9496 3547 9510

Special weather statement, Aug 29, 6:26 PM CDT, 56 minutes before

Special Weather Statement
National Weather Service Tulsa OK
626 PM CDT WED AUG 29 2018

OKZ066-071-300000-
Okmulgee OK-McIntosh OK-
626 PM CDT WED AUG 29 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MCINTOSH AND SOUTH
CENTRAL OKMULGEE COUNTIES UNTIL 700 PM CDT...

At 625 PM CDT, a strong thunderstorm was located 3 miles southeast of
Hoffman, moving north at 25 mph.

Dime size hail and wind gusts up to 50 mph will be possible with this
storm.

Locations in or near the path include...
Grayson...                        Hoffman...
Hitchita...                       Pierce...

This includes Interstate 40 in Oklahoma between mile markers 243 and
256.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3539 9567 3536 9589 3553 9591 3555 9565
TIME...MOT...LOC 2325Z 168DEG 21KT 3545 9580

Special weather statement, Aug 29, 7:22 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
Aug 29, 11:18 PM CDT	Special Weather Statement	TSA	Tulsa	57 min
Aug 29, 11:54 PM CDT	Special Weather Statement	TSA	Washington	36 min
Aug 30, 11:07 AM CDT	Special Weather Statement	TSA	Ottawa	38 min
Aug 30, 3:10 PM CDT	Special Weather Statement	TSA	Craig, Ottawa	35 min
Aug 30, 3:28 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Ottawa	33 min
Aug 30, 3:34 PM CDT	Special Weather Statement	TSA	Mayes, Rogers	41 min
Aug 30, 4:00 PM CDT	Special Weather Statement	TSA	Delaware	30 min
Aug 30, 4:12 PM CDT	Special Weather Statement	TSA	Mayes	33 min
Aug 30, 4:14 PM CDT	Special Weather Statement	TSA	Mayes, Rogers	16 min
Aug 30, 4:30 PM CDT	Special Weather Statement	TSA	Delaware, Mayes	45 min
Aug 30, 5:04 PM CDT	Special Weather Statement	TSA	Adair, Cherokee	26 min
Aug 30, 5:28 PM CDT	Special Weather Statement	TSA	Adair, Sequoyah	32 min
Aug 30, 1:03 PM CDT	Special Weather Statement	TSA	Benton	42 min
Aug 30, 1:17 PM CDT	Severe Thunderstorm Warning	TSA	Benton	43 min
Aug 30, 1:54 PM CDT	Special Weather Statement	TSA	Benton	36 min
Aug 30, 6:37 PM CDT	Special Weather Statement	TSA	Sebastian	38 min

Nearby

Special Weather Statements in Oklahoma, 2018 Every special weather statement in 2018

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.