SPC MD 1394



MD 1394 CONCERNING TORNADO WATCH 416… FOR DELAWARE…NEW JERSEY…FAR EASTERN PENNSYLVANIA

MD 1394 Image


Mesoscale Discussion 1394
NWS Storm Prediction Center Norman OK
0759 AM CDT Tue Aug 04 2020

Areas affected...Delaware...New Jersey...far eastern Pennsylvania

Concerning...Tornado Watch 416...

Valid 041259Z - 041430Z

The severe weather threat for Tornado Watch 416 continues.

SUMMARY...The tornado threat is expected to increase into southern
New Jersey, northern Delaware, and far eastern Pennsylvania over the
next 1-3 hours.

DISCUSSION...An impressive, long-lived arc of supercells just
north/east of the tropical cyclone track continues to rapidly shift
north. Supercells with sporadic couplets/tornadoes currently stretch
from eastern MD/northern DE southeastward, with cells now
approaching coastal southern NJ.

The DIX VWP has shown a substantial increase in low-level shear over
the past couple hours, with 0-1 km SRH quickly approaching 300
m2/s2. Shear values will likely max-out just before the arcing line
of storms arrives later this morning. 

12Z soundings also show impressive low-level CAPE, primarily
concentrated below 500 mb. Although warming aloft will occur with
the approach of the tropical cyclone, areas that experience mid-70 F
dewpoints will maintain a tornado risk.

..Jewell.. 08/04/2020

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...OKX...PHI...

LAT...LON   38827487 39057524 39257561 39457563 40407504 40537454
            40477399 40317390 39787402 39387424 38827487 

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