Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Tulsa, OK

August 21, 2021Creek County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Aug 21, 2021, 8:36 PM CDT for Creek County, Oklahoma. It was in force for 24 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 21, 2021, 8:36 PM CDT (01:36 UTC)
Expired: Aug 21, 2021, 9:00 PM CDT
In force: 24 min
Issued by: NWS Tulsa, OK
Hail: 0.00 in
Wind: 50

County Creek County, OK

The radar

The Tulsa radar (KINX), 66 km from the middle of the area, began a volume at 01:38 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, 1.6 hours before the alert went out and 240 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: 729 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 895 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

331 
WWUS84 KTSA 220136
SPSTSA

Special Weather Statement
National Weather Service Tulsa OK
836 PM CDT Sat Aug 21 2021
 
OKZ059-060-064-066-220200-
Tulsa OK-Okmulgee OK-Pawnee OK-Creek OK-
836 PM CDT Sat Aug 21 2021

...Strong thunderstorms will impact portions of Creek, southeastern
Pawnee, northwestern Okmulgee and west central Tulsa Counties through
900 PM CDT...

At 835 PM CDT, Doppler radar indicated strong thunderstorms along a
line extending from 7 miles southwest of Mannford to 8 miles west of
Kellyville to near Bristow to 7 miles north of Welty. Movement was
northeast at 20 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around 
         unsecured objects.

Locations in or near the path include...
Sand Springs...                   Bristow...
Sapulpa...                        Mannford...
Kellyville...                     Westport...
Slick...                          Keystone State Park...
Silver City...                    

This includes Interstate 44 between mile markers 185 and 211.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

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

&&

LAT...LON 3623 9630 3623 9626 3621 9624 3620 9624
      3617 9627 3616 9627 3616 9618 3607 9611
      3591 9609 3575 9617 3568 9648 3592 9651
      3608 9655
TIME...MOT...LOC 0135Z 242DEG 15KT 3605 9643 3595 9636 3582 9636 3573
9641

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

$$
Snider

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 8:17 PM CDT	Special Weather Statement	TSA	Creek	13 min
Aug 21, 9:00 PM CDT	Special Weather Statement	TSA	Creek, Tulsa	45 min
Aug 21, 9:49 PM CDT	Special Weather Statement	TSA	Muskogee	26 min
Aug 21, 9:52 PM CDT	Special Weather Statement	TSA	Okmulgee	23 min
Aug 21, 10:16 PM CDT	Areal Flood Advisory	TSA	Muskogee, Okmulgee, Wagoner	3 hr
Aug 21, 10:16 PM CDT	Special Weather Statement	TSA	Muskogee, Okmulgee	14 min
Aug 21, 10:30 PM CDT	Special Weather Statement	TSA	Muskogee, Okmulgee	30 min
Aug 21, 11:02 PM CDT	Special Weather Statement	TSA	Muskogee	28 min
Aug 22, 2:22 AM CDT	Excessive Heat Warning	TSA	Rogers, Tulsa, Wagoner	18 hr
Aug 22, 2:44 PM CDT	Heat Advisory	TSA	Adair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more	29 hr
Aug 22, 4:43 PM CDT	Special Weather Statement	TSA	Pawnee	47 min
Aug 22, 4:43 PM CDT	Special Weather Statement	TSA	Muskogee	32 min
Aug 22, 5:30 PM CDT	Special Weather Statement	TSA	Tulsa	30 min
Aug 22, 5:45 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	19 min
Aug 22, 5:56 PM CDT	Special Weather Statement	TSA	Tulsa	34 min
Aug 22, 6:23 PM CDT	Special Weather Statement	TSA	Haskell	37 min
Aug 22, 5:48 PM CDT	Special Weather Statement	TSA	Carroll	27 min

Nearby

Special Weather Statements in Oklahoma, 2021 Every special weather statement in 2021

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.