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Severe Weather Threat May 17-19, 2025

Update:
As of 530 AM, high-based showers and isolated storms are beginning
to develop within a mid-level moisture plume extending
northeastward from the Texas Hill Country. This trend should
continue this morning, with perhaps a couple of more robust cells
capable of small hail and gusty winds becoming established after
sunrise. The main severe weather risk is still from mid afternoon
into the evening, and will primarily be in North Texas where an
environment supportive of supercells will be in place with all
severe hazards possible. Overnight CAM guidance remains fairly
subdued in terms of convective coverage within the forecast area,
while coarser global guidance continues to support widespread
convection ahead of the dryline. Current thinking is still that
CAMs are underdone, and have gone more bullish with PoPs than most
short-term guidance would indicate given there will be strong
synoptic forcing available and a very unstable buoyant sector
ahead of the dryline. The remainder of the trends outlined below
remain valid for today`s event.

Out of the FWD office
 
To put into perspective how unusual (but not unprecedented) the 10% SIG TOR hatch is for North MS/Mid-South during the month of May, the last time we had a 10% SIG TOR hatch or greater equivalent was on May 25th, 2011 and again on May 2nd, 2010.
 

It seems like multiple high profile chasers were frustrated with the early portion of the event and either called it or were ready to when then the Greensburg cell initiated and became surface based.

Brad Arnold mentioned on stream last night that he booked a hotel in OKC for that reason only to end up on the southern KS cell until it died. Reed and his team called it early as well
 
It seems like multiple high profile chasers were frustrated with the early portion of the event and either called it or were ready to when then the Greensburg cell initiated and became surface based.

Brad Arnold mentioned on stream last night that he booked a hotel in OKC for that reason only to end up on the southern KS cell until it died. Reed and his team called it early as well
Speaking of which.
 
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