Alert archive / Oklahoma / Special Weather Statements in 2021
Special Weather Statement, NWS Tulsa, OK
NWS Tulsa, OK issued this special weather statement at May 9, 2021, 2:21 AM CDT for Sequoyah 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
- May 9, 2021, 2:21 AM CDT (07:21 UTC)
- Expired
- May 9, 2021, 2:45 AM CDT
- In force
- 24 min
- Issued by
- NWS Tulsa, OK
County Sequoyah County, OK
The radar
The Western Arkansas radar (KSRX), 64 km from the middle of the area, began a volume at 07:24 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, 7.4 hours before the alert went out and 184 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
- 2 J/kg
- Mixed-layer CIN
- -429 J/kg
- Mixed-layer LCL
- 2095 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 177 m²/s²
- 0-3 km storm-relative helicity
- 370 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
916
WWUS84 KTSA 090721
SPSTSA
Special Weather Statement
National Weather Service Tulsa OK
221 AM CDT Sun May 9 2021
OKZ068-069-072-090745-
Adair OK-Sequoyah OK-Cherokee OK-
221 AM CDT Sun May 9 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SEQUOYAH...
SOUTHWESTERN ADAIR AND SOUTHEASTERN CHEROKEE COUNTIES UNTIL 245 AM
CDT...
At 221 AM CDT, a strong thunderstorm was located 3 miles south of
Lake Tenkiller State Park, moving northeast at 55 mph.
Penny size hail and wind gusts up to 50 mph will be possible with
this storm.
Locations in or near the path include...
Vian... Gore...
Marble City... Cookson...
Brushy Lake State Park... Cherokee Landing State Park...
Bunch... Lake Tenkiller State Park...
Brushy... Box...
This includes Interstate 40 in Oklahoma between mile markers 289 and
297.
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 3544 9502 3546 9503 3546 9508 3549 9510
3550 9512 3553 9513 3562 9513 3591 9472
3563 9454
TIME...MOT...LOC 0721Z 235DEG 49KT 3556 9505
$$The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 11:50 PM CDT | Special Weather Statement | TSA | Rogers | 25 min |
| May 9, 12:16 AM CDT | Special Weather Statement | TSA | Rogers | 29 min |
| May 9, 1:00 AM CDT | Special Weather Statement | TSA | Nowata | 30 min |
| May 9, 1:10 AM CDT | Severe Thunderstorm Warning | TSA | Craig, Nowata, Rogers | 24 min |
| May 9, 1:12 AM CDT | Special Weather Statement | TSA | Mayes | 33 min |
| May 9, 1:44 AM CDT | Special Weather Statement | TSA | Ottawa | 46 min |
| May 9, 1:47 AM CDT | Special Weather Statement | TSA | Delaware | 28 min |
| May 9, 2:08 AM CDT | Special Weather Statement | TSA | Delaware | 37 min |
| May 9, 2:15 AM CDT | Severe Thunderstorm Warning | TSA | Benton | 30 min |
| May 9, 3:01 AM CDT | Special Weather Statement | TSA | Crawford | 29 min |
| May 9, 3:17 AM CDT | Severe Thunderstorm Warning | TSA | Crawford, Franklin, Madison, Washington | 43 min |
| May 9, 3:47 AM CDT | Special Weather Statement | TSA | Carroll | 28 min |
| May 9, 4:02 AM CDT | Special Weather Statement | TSA | Madison | 28 min |
| May 9, 10:12 AM CDT | Special Weather Statement | TSA | Carroll | 33 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; radar from the NEXRAD Level II archive.