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  • MESO: Mesoscale Discussion 1779

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat Jul 29 22:21:15 2023
    ACUS11 KWNS 292220
    SWOMCD
    SPC MCD 292220=20
    NJZ000-MDZ000-DEZ000-VAZ000-292345-

    Mesoscale Discussion 1779
    NWS Storm Prediction Center Norman OK
    0520 PM CDT Sat Jul 29 2023

    Areas affected...Eastern Virginia into the Delmarva and southern New
    Jersey

    Concerning...Severe Thunderstorm Watch 571...

    Valid 292220Z - 292345Z

    The severe weather threat for Severe Thunderstorm Watch 571
    continues.

    SUMMARY...A damaging wind threat continues across eastern Virginia
    into the Delmarva and southern New Jersey.

    DISCUSSION...Storms developed across northern Virginia and central
    Maryland late this afternoon and quickly organized into a forward
    propagating squall line with numerous measured severe wind gusts
    over the past 1 to 2 hours. This line of storms has started to
    weaken with significant reduction in 9km MRMS CAPPI over the past
    hour. However, there is enough organization with this line of storms
    for continued damaging wind gusts and occasional severe wind gusts
    to the Atlantic Coast from southern New Jersey to southern Delaware.

    Farther southwest, additional convection has started to form along
    the front from near Blacksburg, Virginia to northeast Virginia.
    These storms are south of the better mid-level flow (~20 knots per
    RNK VWP vs 35-40 knots per LWX VWP) and therefore, storm
    organization may be a bit more transient. Nonetheless, significant
    instability (2000 to 2500 J/kg) and decent convergence along the
    cold front should be sufficient for a damaging wind threat as these
    storms move east through the evening.

    ..Bentley.. 07/29/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-Mi0j-B_I2BqF5ytvEB_Sfso6QUFCTZCoQfmZ8apJMKVpDJcCETyi7bBq4iaQDUT92uGTlJ24= FZ4V512akYLpkHGPKk$ for graphic product...

    ATTN...WFO...PHI...AKQ...LWX...RNK...

    LAT...LON 36628027 37227939 38357757 38777690 39077626 39527558
    39807517 39767468 39487429 39017432 38307472 37417545
    37117597 37017635 36727714 36628027=20


    =3D =3D =3D
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