• MESO: Mesoscale Discussion 1479

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thursday, July 14, 2022 16:21:07
    ACUS11 KWNS 141621
    SWOMCD
    SPC MCD 141620=20
    TXZ000-141845-

    Mesoscale Discussion 1479
    NWS Storm Prediction Center Norman OK
    1120 AM CDT Thu Jul 14 2022

    Areas affected...Portions of central TX

    Concerning...Severe potential...Watch unlikely=20

    Valid 141620Z - 141845Z

    Probability of Watch Issuance...20 percent

    SUMMARY...A loosely organized complex of thunderstorms may pose an
    isolated threat for strong to damaging winds through the afternoon.
    Watch issuance appears unlikely at this time.

    DISCUSSION...A cluster of convection developed overnight across
    northeast TX on the eastern periphery of an upper ridge centered
    over the Southwest. This cluster has persisted through the morning
    while moving slowly southwestward. Although low/mid-level flow
    across much of TX is expected to remain modest, around 15-25 kt of northeasterly mid-level winds should encourage the ongoing
    thunderstorms to continue progressing southwestward across parts of
    central TX through the early afternoon. A rather moist airmass is in
    place ahead of this activity, with surface dewpoints generally in
    the upper 60s to low 70s. Strong diurnal heating will likely
    continue over the next several hours based on recent visible
    satellite trends, and instability should further increase in tandem
    with steepening low-level lapse rates. Even with deep-layer shear
    remaining modest, the moderate to strong instability forecast to
    develop, including substantial DCAPE with inverted-v forecast
    soundings, should support an isolated risk for strong to damaging
    winds. Still, current expectations are for this damaging wind threat
    to remain fairly isolated, and watch issuance appears unlikely at
    this time.

    ..Gleason/Thompson.. 07/14/2022

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!9YhyPmzIkY3WzEB3vbubqzw9i4_198wpVvM5klgWTtw4bTS_ARINwRhAHN1lpTie3JOfZxHlf= _d_HHGsEGHdwWZ4sG8$ for graphic product...

    ATTN...WFO...HGX...FWD...EWX...SJT...

    LAT...LON 31079524 30099569 29959660 30039761 30559855 31389908
    32149912 32879871 33099799 33079691 32549686 31669638
    31079524=20


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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, July 09, 2023 20:09:25
    ACUS11 KWNS 092009
    SWOMCD
    SPC MCD 092008=20
    NJZ000-MDZ000-DEZ000-PAZ000-VAZ000-092145-

    Mesoscale Discussion 1479
    NWS Storm Prediction Center Norman OK
    0308 PM CDT Sun Jul 09 2023

    Areas affected...Eastern Virginia...eastern
    Maryland...Delaware...far southeast Pennsylvania and southern New
    Jersey

    Concerning...Severe Thunderstorm Watch 465...466...467...

    Valid 092008Z - 092145Z

    The severe weather threat for Severe Thunderstorm Watch 465, 466,
    467 continues.

    SUMMARY...The severe weather threat continues across the Delmarva
    into eastern Virginia.

    DISCUSSION...Isolated damaging wind gusts remain possible with
    ongoing thunderstorms across eastern portions of watch 465 and 467.
    The combination of numerous storms and poor organization due to
    weakening shear (20-25 knots per area VWP) has limited the overall
    severe weather threat. Isolated water-loaded downdrafts capable of
    wind damage remain possible for the next few hours before the
    remaining instability is eroded and the severe weather threat
    ceases.

    ..Bentley.. 07/09/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!8egZ7wVkUgh3ChLebIidiUQMCogY1mh-ht0Kbb0YiqMCHwA2OH89AyISVj0bbEy1kJexClhXf= MQK9yiXqOkrS1IZfVU$ for graphic product...

    ATTN...WFO...PHI...AKQ...CTP...LWX...

    LAT...LON 37097685 37537705 39027685 39847639 40067576 39617503
    38847504 38257500 37127577 36827602 36807662 37097685=20


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