1. Forum
  2. Fidonet Message
  3. WEATHER

  • MESO: Mesoscale Discussion 0003

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, January 02, 2019 13:08:14
    This is a multi-part message in MIME format...

    ------------=_1546430899-22122-13675
    Content-Type: text/plain

    ACUS11 KWNS 021208
    SWOMCD
    SPC MCD 021207
    TXZ000-021600-

    Mesoscale Discussion 0003
    NWS Storm Prediction Center Norman OK
    0607 AM CST Wed Jan 02 2019

    Areas affected...Portions of north/central TX

    Concerning...Freezing rain

    Valid 021207Z - 021600Z

    SUMMARY...Light freezing rain, with rates around 0.05-0.10 inch per
    3 hours, will be possible through mid-morning (around 16Z/10 AM
    CST).

    DISCUSSION...Ascent associated with the right entrance region of a
    strong southwesterly upper-level jet is contributing to a swath of precipitation this morning extending across parts of north/central
    TX into the ArkLaTex region. A shallow, cold low-level airmass
    remains in place over these areas, and continued moistening of the
    column has resulted in generally light precipitation beginning to
    reach the ground over the past couple of hours. The primary
    precipitation type for the bulk of the precipitation shield is rain.
    But, a relatively narrow southwest-to-northeast oriented corridor of sub-freezing surface temperatures exists on the western edge of
    light radar reflectivities, generally from near/just south of San
    Angelo to the western portions of the Dallas/Fort Worth metro.
    Temperatures well above freezing (5 to 8C) in the 850-700 mb layer
    will completely melt hydrometeors aloft, while surface temperatures
    at/below 32F across these areas will support light freezing rain
    through at least mid-morning. Freezing rain rates of 0.05-0.10 inch
    per 3 hours seem reasonable given the mostly weak reflectivities
    noted on radar so far this morning, and this scenario is generally
    depicted in most recent short-term guidance. A somewhat better
    potential for ice accretion should exist where surface temperatures
    of 27-30F are present. Modest diurnal heating will warm the low
    levels by mid-morning (around 16Z/10 AM CST). Accordingly, as
    surface temperatures begin to climb above freezing, this will likely
    reduce the freezing rain threat.

    ..Gleason.. 01/02/2019

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

    ATTN...WFO...FWD...SJT...

    LAT...LON 30449978 30340078 30520091 31580046 32409979 32989912
    33399853 33379758 33219714 32249756 31639819 30999889
    30449978



    ------------=_1546430899-22122-13675
    Content-Type: text/plain; charset="US-ASCII"
    Content-Disposition: inline
    Content-Transfer-Encoding: 7BIT

    = = =
    To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM. ------------=_1546430899-22122-13675--

    --- SBBSecho 3.06-Linux
    * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105)