Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Tulsa, OK

December 10, 2021Delaware County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Dec 10, 2021, 6:14 PM CST for Delaware County, Oklahoma. It was in force for 31 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: Dec 10, 2021, 6:14 PM CST (00:14 UTC)
Expired: Dec 10, 2021, 6:45 PM CST
In force: 31 min
Issued by: NWS Tulsa, OK
Hail: 0.88 in
Wind: 50

County Delaware County, OK

The radar

The Tulsa radar (KINX), 93 km from the middle of the area, began a volume at 00:13 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, 0.2 hours before the alert went out and 96 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: 637 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1113 m above ground
0-6 km bulk shear: 80 kt
0-1 km storm-relative helicity: 344 m²/s²
0-3 km storm-relative helicity: 300 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 8.4

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 Dec 10, 5:48 PM CST, 26 minutes earlier.

Area forecast discussion, Dec 10, 5:48 PM CST, 26 minutes before

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Hazardous weather outlook, Dec 10, 4:55 PM CST, 1 hour 19 minutes before

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In the hours before

Special weather statement, Dec 10, 6:14 PM CST, 0 minutes before

Special Weather Statement
National Weather Service Tulsa OK
614 PM CST Fri Dec 10 2021

ARZ001-OKZ063-068-069-110045-
Benton AR-Adair OK-Cherokee OK-Delaware OK-
614 PM CST Fri Dec 10 2021

...Strong thunderstorms will impact portions of western Benton,
southeastern Delaware, northwestern Adair and northeastern Cherokee
Counties through 645 PM CST...

At 613 PM CST, Doppler radar indicated strong thunderstorms along a
line extending from 3 miles northwest of Colcord to 3 miles west of
Scraper. Movement was northeast at 70 mph.

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

SOURCE...Radar indicated.

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

Locations in or near the path include...
Bentonville...                    Siloam Springs...
Bella Vista...                    Gentry...
Gravette...                       Decatur...
West Siloam Springs...            Colcord...
Kansas...                         Highfill...
Oaks...                           Springtown...
Hiwasse...                        Leach...
Twin Oaks...                      Maysville...
Scraper...                        Miller...
Centerton...                      Lake Eucha State Park...

This includes Interstate 49 between mile markers 92 and 93.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3616 9441 3605 9512 3650 9460 3650 9415
TIME...MOT...LOC 0013Z 245DEG 60KT 3629 9474 3609 9491

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 10, 6:37 PM CST	Severe Thunderstorm Warning	TSA	Delaware	38 min
Dec 10, 6:56 PM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee	34 min
Dec 10, 8:08 PM CST	Special Weather Statement	TSA	LeFlore	37 min
Dec 10, 8:31 PM CST	Special Weather Statement	TSA	LeFlore	44 min
Dec 10, 7:18 PM CST	Special Weather Statement	TSA	Benton	27 min
Dec 10, 7:22 PM CST	Tornado Warning	TSA	Washington	22 min
Dec 10, 7:40 PM CST	Special Weather Statement	TSA	Washington	35 min
Dec 10, 8:02 PM CST	Special Weather Statement	TSA	Carroll	28 min
Dec 10, 8:07 PM CST	Special Weather Statement	TSA	Crawford	23 min
Dec 10, 8:42 PM CST	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	33 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.