• MESO: Mesoscale Discussion 2032

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Dec 14 19:20:47 2022
    ACUS11 KWNS 141920
    SWOMCD
    SPC MCD 141920=20
    ALZ000-MSZ000-LAZ000-142045-

    Mesoscale Discussion 2032
    NWS Storm Prediction Center Norman OK
    0120 PM CST Wed Dec 14 2022

    Areas affected...Southern MS...Southwest AL...Eastern LA

    Concerning...Tornado Watch 588...

    Valid 141920Z - 142045Z

    The severe weather threat for Tornado Watch 588 continues.

    SUMMARY...The threat for strong, long-track tornadoes continues.

    DISCUSSION...Regional radar imagery continues to show numerous
    discrete supercells, including a few which have rotational velocity
    around 40 to 50 kt. The overall environment remain very conducive to
    tornadic supercells with ample low-level moisture and buoyancy in
    the presence of strong low to mid-level flow. Recent KLIX VAD data
    shows increasing winds in the 1-2 km layer. This increase is likely
    due to a mesoscale low-level jet, which is expected to move
    northeastward across far southern MS and into southwest AL over the
    next several hours. Attendant strengthening of the low-level shear
    within this corridor could augment the already favorable conditions.
    Surface observations also numerous gusts of 25 to 30 kt across
    southeast LA.

    Additionally, ongoing storms will likely strengthen as they approach
    and interact the warm front, which now extends from about 50 miles
    northwest of MEI southeastward to south of GZH in southern AL.

    In all, the threat for strong, long-track tornadoes will continue
    for at least the next few hours across eastern LA and southern MS,
    eventually reaching southwest AL later this afternoon/early this
    evening.

    ..Mosier/Hart.. 12/14/2022

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!5hjlGAYmHK2C7-RQfyL3_Mt2bRI3zzzspcopqhPfuUP8hSXJTDAdme-VufQ9pFTQsiGyUhPdG= Lvs4gknF8RQdDT03Zk$ for graphic product...

    ATTN...WFO...BMX...MOB...JAN...LIX...LCH...

    LAT...LON 32069040 32588997 32708948 32388832 31668781 30948824
    30728862 30378922 29628998 29579157 32069040=20


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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thu Aug 24 02:21:24 2023
    ACUS11 KWNS 240221
    SWOMCD
    SPC MCD 240220=20
    NDZ000-240345-

    Mesoscale Discussion 2032
    NWS Storm Prediction Center Norman OK
    0920 PM CDT Wed Aug 23 2023

    Areas affected...Parts of central North Dakota

    Concerning...Severe Thunderstorm Watch 653...

    Valid 240220Z - 240345Z

    The severe weather threat for Severe Thunderstorm Watch 653
    continues.

    SUMMARY...The severe hail/wind risk continues spreading
    southeastward across parts of central North Dakota tonight. While a
    downstream watch is not expected, a local spatial extension of
    Severe Thunderstorm Watch 653 may be warranted.

    DISCUSSION...Latest radar data from KBIS shows a well-established
    right-moving supercell cluster tracking southeastward
    along/immediately south of a northwest/southeast-oriented baroclinic
    zone draped across central ND. The primary concern with this
    activity continues to be large hail and locally severe gusts. A
    long/mostly straight hodograph (around 50 kt of effective shear per
    00Z BIS sounding) and the focused baroclinic zone may support the
    maintenance of this storm cluster in the near-term despite
    increasing nocturnal boundary-layer static stability. Therefore, a
    local spatial extension of Severe Thunderstorm Watch 653 may be
    warranted given a continued risk of large hail and locally severe
    winds.

    ..Weinman.. 08/24/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!4SfRLrAn9ppOhqFLAlhnUcjnG0H6eCrQG5aTjPTqCJg6_wGSn-SttZmzuE-bpEMNdJhqLfafs= sR5Ckbb9R3FnNnc-Bo$ for graphic product...

    ATTN...WFO...BIS...

    LAT...LON 47560090 47740091 47890072 47990043 47950019 47819983
    47529927 47289907 47059913 46929945 46979988 47160030
    47360067 47560090=20


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