Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 325, NWS Tulsa, OK

August 11, 20234 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Aug 11, 2023, 7:26 PM CDT for 4 counties in Oklahoma. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 11, 2023, 7:26 PM CDT (00:26 UTC)
Expired: Aug 11, 2023, 8:15 PM CDT
In force: 49 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Craig County, OK, Mayes County, OK, Nowata County, OK, Rogers County, OK

The radar

The Tulsa radar (KINX), 45 km from the middle of the area, began a volume at 00:30 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

Norman, OK (KOUN), launched 00:00Z, 0.4 hours before the alert went out and 233 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: 2282 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 2559 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.8

Open this sounding in Storm Lab

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 Aug 11, 6:33 PM CDT, 53 minutes earlier.

Area forecast discussion, Aug 11, 6:33 PM CDT, 53 minutes before

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Hazardous weather outlook, Aug 11, 5:04 PM CDT, 2 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
504 PM CDT Fri Aug 11 2023

ARZ001-002-010-011-019-020-029-OKZ049-053>076-121030-
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-
504 PM CDT Fri Aug 11 2023

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...Eastern Oklahoma and Northwest Arkansas.
	ONSET...Isolated through 10 PM...chances increase after 1 AM.

DANGEROUS HEAT.
	RISK...Critical.
	AREA...Eastern Oklahoma and Northwest Arkansas.
	ONSET...Ongoing...improving after sunset.

DISCUSSION...
Dangerous heat continues this afternoon with widespread heat index values of
105 to 115 degrees across eastern Oklahoma and northwest Arkansas. Conditions
will slowly improve after sunset with dangerous heat returning Saturday.
Isolated thunderstorms remain possible this afternoon and evening across
eastern Oklahoma with a limited risk of severe weather. Additional storms
may spread into the region after midnight and most likely focused across
far northeast Oklahoma and northwest Arkansas. These storms will also have
a limited risk of severe weather.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Local Spotter Activation May Be Needed.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
SATURDAY and SUNDAY...Thunderstorm and Dangerous Heat Potential.
MONDAY through WEDNESDAY...No Hazards.
THURSDAY...Dangerous Heat Potential.

EXTENDED DISCUSSION...
Dangerous heat will continue across the region both Saturday and Sunday.
Afternoon heat index values of 105 to 115 will remain possible both day.

Thunderstorms may be ongoing across the region Saturday morning and
additional development is possible Saturday night into Sunday. The higher
chances will remain across northeast Oklahoma through northwest Arkansas.
A cold front passes Sunday with an increased corridor of thunderstorm
chances followed by cooler and drier air for early next week.

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, Aug 11, 5:37 PM CDT, 1 hour 49 minutes before

Special Weather Statement
National Weather Service Tulsa OK
537 PM CDT Fri Aug 11 2023

OKZ054-112330-
Osage OK-
537 PM CDT Fri Aug 11 2023

...A strong thunderstorm will impact portions of north central Osage
County through 630 PM CDT...

At 537 PM CDT, Doppler radar indicated a strong thunderstorm over
Hardy, moving east at 25 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down small tree limbs and blow
         around unsecured objects. Minor damage to outdoor objects
         is possible.

Locations in or near the path include...
Grainola...                       Foraker...
Pearsonia...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3700 9638 3674 9643 3684 9675 3700 9675
TIME...MOT...LOC 2237Z 287DEG 23KT 3697 9678

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

Special weather statement, Aug 11, 6:09 PM CDT, 1 hour 17 minutes before

Special Weather Statement
National Weather Service Tulsa OK
609 PM CDT Fri Aug 11 2023

OKZ054-120000-
Osage OK-
609 PM CDT Fri Aug 11 2023

...A strong thunderstorm will impact portions of northeastern Osage
County through 700 PM CDT...

At 609 PM CDT, Doppler radar indicated a strong thunderstorm 3 miles
north of Pearsonia, moving east at 35 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down small tree limbs and blow
         around unsecured objects. Minor damage to outdoor objects
         is possible.

Locations in or near the path include...
Bartlesville...                   Bigheart...
Osage Hills State Park...         Pearsonia...
Bartlesville Municipal Airport... Hulah...
Sunset Lake...                    Wah Sha She State Park...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3693 9600 3670 9600 3680 9647 3695 9644
TIME...MOT...LOC 2309Z 281DEG 29KT 3686 9643

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

Local storm report, Aug 11, 6:34 PM CDT, 52 minutes before

Preliminary Local Storm Report
National Weather Service Tulsa OK
634 PM CDT Fri Aug 11 2023

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

0615 PM     Tstm Wnd Gst     8 ESE Foraker           36.83N 96.43W
08/11/2023  M74 MPH          Osage              OK   Mesonet

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 7:46 PM CDT	Special Weather Statement	TSA	Rogers	29 min
Aug 11, 7:56 PM CDT	Special Weather Statement	TSA	Mayes	34 min
Aug 11, 8:19 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Delaware, Mayes	56 min
Aug 11, 9:04 PM CDT	Special Weather Statement	TSA	Adair	41 min
Aug 11, 10:44 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	35 min
Aug 12, 1:30 PM CDT	Excessive Heat Warning	TSA	Choctaw, Creek, Haskell, Latimer, McIntosh, Mayes and 8 more	30 hr
Aug 12, 1:30 PM CDT	Heat Advisory	TSA	Cherokee, Craig, Creek, Delaware, Haskell, Latimer and 13 more	30 hr
Aug 11, 9:36 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Washington	39 min
Aug 11, 10:14 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian, Washington	61 min
Aug 11, 11:13 PM CDT	Severe Thunderstorm Warning	TSA	Franklin	23 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2023 Every severe thunderstorm warning in 2023

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.