WW 139 TORNADO IL MO 152105Z – 160300Z
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 139
NWS Storm Prediction Center Norman OK
405 PM CDT Sat Apr 15 2023
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Southwest Illinois
Southeast Missouri
* Effective this Saturday afternoon and evening from 405 PM until
1000 PM CDT.
* Primary threats include...
A couple tornadoes possible
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail and isolated very large hail events to 2.5
inches in diameter possible
SUMMARY...Supercells evolving into a cluster with embedded line
segments is expected to spread east across the Mid-Mississippi
Valley. Hail transitioning to damaging wind should be the main
threat, but a couple embedded tornadoes are possible as well.
The tornado watch area is approximately along and 50 statute miles
east and west of a line from 40 miles northwest of Alton IL to 35
miles east southeast of Poplar Bluff MO. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU9).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and 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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 137...WW 138...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2.5 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 24035.
...Grams
