SWOMCD
SPC MCD 022349
TXZ000-030115-
MESOSCALE DISCUSSION 0676
NWS STORM PREDICTION CENTER NORMAN OK
0649 PM CDT SAT MAY 02 2009
AREAS AFFECTED...NCNTRL-NERN TX
CONCERNING...HEAVY RAINFALL
VALID 022349Z - 030115Z
IN ADDITION TO THE LARGE HAIL THREAT...VERY HEAVY RAINFALL WILL
TRAIN ACROSS A 40 MILE CORRIDOR FROM DALLAS NEWD TO KTXK. RATES
COULD EXCEED 2-3 IN/HR.
TRAILING OUTFLOW BOUNDARY EMANATING FROM THE BOW ECHO MOVING ACROSS
SRN AR HAS SETTLED INTO NERN TX...ROUGHLY ALONG I-20 FROM DALLAS TO
NW OF KSHV. RECENTLY...ANOTHER BATCH OF MAINLY ELEVATED TSTMS HAS
DEVELOPED AND CAUSED FLASH FLOODING IN THE DALLAS METROPLEX. THESE
STORMS...AND ADDITIONAL UPDRAFTS...WILL LIKELY MERGE ALONG/N OF THE
OUTFLOW BOUNDARY IN THE AFOREMENTIONED CORRIDOR THROUGH 02Z.
PROGGED SSW H85 JET OF 30-35 KTS ORIENTED NORMAL TO THE BOUNDARY
WILL ADVECT 1.5+ INCH PWATS INTO THE SRN PART OF THE DEVELOPING
MCS...RESULTING IN STRONG MOISTURE TRANSPORT AND HIGH RAINFALL
EFFICIENCIES FOR A FEW HOURS AS THE STORMS TRAIN ENEWD.
..RACY.. 05/02/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SHV...FWD...
LAT...LON 32879678 33319585 33449422 32759436 32549677 32879678
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