Alert archive / Oklahoma / Special Weather Statements in 2021
Special Weather Statement, NWS Tulsa, OK
NWS Tulsa, OK issued this special weather statement at Sep 20, 2021, 11:21 PM CDT for Delaware County, Mayes County, Oklahoma. It was in force for 39 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 20, 2021, 11:21 PM CDT (04:21 UTC)
- Expired
- Sep 21, 2021, 12:00 AM CDT
- In force
- 39 min
- Issued by
- NWS Tulsa, OK
- Hail
- 0.00 in
- Wind
- 40
Counties Delaware County, OK, Mayes County, OK
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 4.4 hours before the alert went out and 101 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.
- Mixed-layer CAPE
- 842 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1973 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted.
128
WWUS84 KTSA 210421
SPSTSA
Special Weather Statement
National Weather Service Tulsa OK
1121 PM CDT Mon Sep 20 2021
ARZ001-OKZ062-063-210500-
Benton AR-Delaware OK-Mayes OK-
1121 PM CDT Mon Sep 20 2021
...Strong thunderstorms will impact portions of northwestern Benton,
central Delaware and southeastern Mayes Counties through Midnight
CDT...
At 1121 PM CDT, Doppler radar indicated strong thunderstorms along a
line extending from near South West City to near Chloeta to 2 miles
south of Sportsmen Acres Community. Movement was east at 35 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations in or near the path include...
Bella Vista... Jay...
Grove... Chouteau...
Locust Grove... Salina...
Spavinaw... Hoot Owl...
Maysville... Honey Creek State Park...
Rose... Spavinaw State Park...
Chloeta... Sportsmen Acres Community...
Dodge... Cayuga...
Strang... Lake Eucha State Park...
Snowdale State Park... Zena...
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 3650 9462 3650 9438 3643 9450 3621 9494
3614 9540 3641 9513 3662 9476 3664 9462
TIME...MOT...LOC 0421Z 248DEG 29KT 3653 9459 3640 9497 3620 9526
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
$$The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 9:45 PM CDT | Special Weather Statement | TSA | Ottawa | 30 min |
| Sep 21, 1:29 AM CDT | Severe Thunderstorm Warning | TSA | Adair | 46 min |
| Sep 20, 11:44 PM CDT | Severe Thunderstorm Warning | TSA | Benton | 46 min |
| Sep 21, 12:12 AM CDT | Special Weather Statement | TSA | Benton | 33 min |
| Sep 21, 12:46 AM CDT | Special Weather Statement | TSA | Benton, Carroll | 44 min |
| Sep 21, 1:17 AM CDT | Special Weather Statement | TSA | Washington | 43 min |
| Sep 21, 2:11 AM CDT | Severe Thunderstorm Warning | TSA | Washington | 32 min |
Nearby
Special Weather Statements in Oklahoma, 2021Every 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.