• MESO: Mesoscale Discussion 0515

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Friday, May 25, 2018 02:26:10
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    ACUS11 KWNS 250226
    SWOMCD
    SPC MCD 250225
    KSZ000-250400-

    Mesoscale Discussion 0515
    NWS Storm Prediction Center Norman OK
    0925 PM CDT Thu May 24 2018

    Areas affected...Central KS

    Concerning...Severe potential...Watch unlikely

    Valid 250225Z - 250400Z

    Probability of Watch Issuance...5 percent

    SUMMARY...Isolated strong wind gusts and hail are possible for the
    next few hours across central KS. Marginal nature of the threat will
    preclude the need for a watch.

    DISCUSSION...Well-defined outflow moving quickly eastward from the
    decaying convective cluster across northwest KS recently initiated
    new thunderstorms across central KS. As evidenced by 00Z DDC and LBF
    soundings, steep mid-level lapse rates persist across the region
    will likely support continued thunderstorm development into central
    KS. Given the onset of low-level nocturnal stabilization, the
    expectation is for most of this activity to remain slightly elevated
    as it continues to forward propagate across central KS for the next
    few hours. A few of the stronger wind gusts produced by this
    convection could reach the surface. Some isolated hail is also
    possible.

    ..Mosier/Grams.. 05/25/2018

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

    ATTN...WFO...ICT...GID...DDC...GLD...

    LAT...LON 39739840 38809815 37849872 37180022 37650096 38150049
    38520030 39290026 39829964 39739840



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Friday, May 03, 2019 17:20:43
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    ACUS11 KWNS 031720
    SWOMCD
    SPC MCD 031720
    TXZ000-031945-

    Mesoscale Discussion 0515
    NWS Storm Prediction Center Norman OK
    1220 PM CDT Fri May 03 2019

    Areas affected...Southeast Texas

    Concerning...Severe potential...Watch unlikely

    Valid 031720Z - 031945Z

    Probability of Watch Issuance...20 percent

    SUMMARY...A marginal hail threat and brief tornado will be possible
    across the Houston area over the next few hours.

    DISCUSSION...The latest surface analysis shows a very moist airmass
    in place across southeast Texas with dewpoints in the lower 70s F. A
    small cluster of thunderstorms is located just to the west of the
    Houston area, associated with an MCV evident on water vapor imagery.
    Surface winds ahead of the MCV are backed to the southeast which is
    enhancing low-level shear. The Houston WSR-88D VWP shows veering
    winds with height in the lowest 3 km AGL with 0-3 km storm relative
    helicity near 220 m2/s2. For this reason, the stronger cells with
    the MCV will rotate and could produce a brief tornado. Also, hail
    will be possible with the stronger updrafts.

    ..Broyles/Guyer.. 05/03/2019

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

    ATTN...WFO...HGX...

    LAT...LON 30189581 29879629 29629633 29409600 29219518 29449487
    29849476 30149493 30189581



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