• MESO: Mesoscale Discussion 1260

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, August 08, 2018 01:58:36
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    ACUS11 KWNS 080158
    SWOMCD
    SPC MCD 080157
    KSZ000-OKZ000-COZ000-TXZ000-NMZ000-080400-

    Mesoscale Discussion 1260
    NWS Storm Prediction Center Norman OK
    0857 PM CDT Tue Aug 07 2018

    Areas affected...Central/southern Front Range of Colorado...far
    northwest New Mexico

    Concerning...Severe Thunderstorm Watch 335...

    Valid 080157Z - 080400Z

    The severe weather threat for Severe Thunderstorm Watch 335
    continues.

    SUMMARY...Southern portions of WW 335, as well as areas just to its
    north will continue to see a threat for large hail and severe wind
    gusts over the next few hours. Convective evolution of these two
    clusters of storms is uncertain at this time. Should upscale growth
    occur, the primary threat will become severe wind gusts.

    DISCUSSION...Most of the activity within WW 335 has waned with the
    exception of storms ongoing in northwest New Mexico. Storms in
    Colfax County, NM have produced at least one instance of hail
    greater than 2 in. in the last couple hours. Another storm in
    Huerfano County, CO continues to pose a severe hail threat as well.
    The cluster of storms in northwest New Mexico may still congeal and
    pose a more organized severe wind gust threat; however, given how
    discrete storms have remained to this point, it is unclear whether
    this will occur.

    Farther north, a few supercell storms have progressed outside of WW
    335. The storm moving over Kit Carson County, CO has produced at
    least two reports of 2+ in. hail in the last two hours. With the
    continued approach of a mid-level wave to the northwest, there is
    indication that this activity may be maintained; however, CAM
    solutions have been erratic in terms of how they handle this cluster
    of storms over the next few hours reducing confidence in
    coverage/longevity of the threat. The 00Z DNR and RIW soundings
    showed mid-level lapse rates around 7.5-8.5 C/km which would
    indicate hail will continue to be a threat going forward. Effective
    shear is also supportive of storm organization across the region
    with 35-45 kts being analyzed by RAP. Severe wind gusts will also be
    possible, though the overall extent of that threat is conditional
    upon upscale growth of this cluster.

    ..Wendt.. 08/08/2018

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

    ATTN...WFO...GLD...AMA...PUB...BOU...ABQ...

    LAT...LON 35740304 35740337 36260533 38430601 38440601 38720592
    39820514 40290417 40180252 39750199 39230197 38220248
    37580262 35740304



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, August 08, 2018 02:17:06
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 080217
    SWOMCD
    SPC MCD 080216 COR
    KSZ000-OKZ000-COZ000-TXZ000-NMZ000-080400-

    Mesoscale Discussion 1260
    NWS Storm Prediction Center Norman OK
    0916 PM CDT Tue Aug 07 2018

    Areas affected...Central/southern Front Range of Colorado...far
    northeast New Mexico

    Concerning...Severe Thunderstorm Watch 335...

    Valid 080216Z - 080400Z

    CORRECTED FOR INCORRECT LOCATION REFERENCE

    The severe weather threat for Severe Thunderstorm Watch 335
    continues.

    SUMMARY...Southern portions of WW 335, as well as areas just to its
    north will continue to see a threat for large hail and severe wind
    gusts over the next few hours. Convective evolution of these two
    clusters of storms is uncertain at this time. Should upscale growth
    occur, the primary threat will become severe wind gusts.

    DISCUSSION...Most of the activity within WW 335 has waned with the
    exception of storms ongoing in northeast New Mexico. Storms in
    Colfax County, NM have produced at least one instance of hail
    greater than 2 in. in the last couple hours. Another storm in
    Huerfano County, CO continues to pose a severe hail threat as well.
    The cluster of storms in northeast New Mexico may still congeal and
    pose a more organized severe wind gust threat; however, given how
    discrete storms have remained to this point, it is unclear whether
    this will occur.

    Farther north, a few supercell storms have progressed outside of WW
    335. The storm moving over Kit Carson County, CO has produced at
    least two reports of 2+ in. hail in the last two hours. With the
    continued approach of a mid-level wave to the northwest, there is
    indication that this activity may be maintained; however, CAM
    solutions have been erratic in terms of how they handle this cluster
    of storms over the next few hours reducing confidence in
    coverage/longevity of the threat. The 00Z DNR and RIW soundings
    showed mid-level lapse rates around 7.5-8.5 C/km which would
    indicate hail will continue to be a threat going forward. Effective
    shear is also supportive of storm organization across the region
    with 35-45 kts being analyzed by RAP. Severe wind gusts will also be
    possible, though the overall extent of that threat is conditional
    upon upscale growth of this cluster.

    ..Wendt.. 08/08/2018

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

    ATTN...WFO...GLD...AMA...PUB...BOU...ABQ...

    LAT...LON 35740304 35740337 36260533 38430601 38440601 38720592
    39820514 40290417 40180252 39750199 39230197 38220248
    37580262 35740304



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    Content-Transfer-Encoding: 7BIT

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