Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 399
NWS Storm Prediction Center Norman OK
855 AM CDT Tue Jun 27 2023
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northwest Arkansas
Eastern Oklahoma
* Effective this Tuesday morning and afternoon from 855 AM until
100 PM CDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 80
mph possible
Isolated large hail events to 1.5 inches in diameter possible
SUMMARY...A small but intense complex of thunderstorms should spread
east-southeast across a portion of eastern Oklahoma this morning
with a continued threat for severe wind gusts.
The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 50 miles southwest of
Tulsa OK to 5 miles south southeast of Fort Smith AR. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU9).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector
29035.
...Grams
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW9
WW 399 SEVERE TSTM AR OK 271355Z - 271800Z
AXIS..45 STATUTE MILES NORTH AND SOUTH OF LINE..
50SW TUL/TULSA OK/ - 5SSE FSM/FORT SMITH AR/
..AVIATION COORDS.. 40NM N/S /47SW TUL - 8SSW FSM/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..70 KNOTS.
MAX TOPS TO 600. MEAN STORM MOTION VECTOR 29035.
LAT...LON 36349651 35919434 34619434 35049651
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU9.
Watch 399 Status Report Messages:
STATUS REPORT #1 ON WW 399
VALID 271650Z - 271740Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 E MLC TO
15 WSW FYV.
..SMITH..06/27/23
ATTN...WFO...TSA...OUN...
&&
STATUS REPORT FOR WS 399
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ARC033-047-131-271740-
AR
. ARKANSAS COUNTIES INCLUDED ARE
CRAWFORD FRANKLIN SEBASTIAN
$$
OKC001-061-077-079-135-271740-
OK
. OKLAHOMA COUNTIES INCLUDED ARE
ADAIR HASKELL LATIMER
LE FLORE SEQUOYAH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (10%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (50%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (50%)
|
Hail
Probability of 10 or more severe hail events
|
Low (20%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (20%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (70%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
weather.gov 
@NWSSPC
