EXCESSIVE RAINFALL DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
827 PM EST THU FEB 20 2003
...VALID 0127Z FRI FEB 21 2003 - 00Z SAT FEB 22 2003...
...REFERENCE AWIPS GRAPHIC UNDER...DAY 1 EXCESSIVE RAINFALL...
RAINFALL COULD EXCEED FFG VALUES TO THE RIGHT OF A LINE FROM
30 S PSX 15 NW RKP 40 ESE SSF 15 ENE HYI 10 W GRK 60 SSE ABI
30 E ABI F39 25 NW DEQ 45 S MWT 40 SW MEM 30 NNE TUP 50 N TCL
10 SE NMM 20 ENE BTR 55 NW 7R8.
18Z MDL RUNS..LATEST SATL/RADAR IMAGERY AND UPR AIR DATA
SUPPORT ERLIER THINKING THAT A SGFNT RNFL EVENT IS ON TAP FM TX
EWD TO THE CNTRL GLF CSTL STATES THIS PD. A STG MLVL CNTR AND
S/WV ENERGY RACING E-NEWD AHD OF THE SYS WILL INTERACT WITH AN
INCREASINGLY STG SLY LLJ (AOA 30 KTS) AND A PLUME OF PWS (AOA 1.5
INCHES) TO PRODUCE WIDESPREAD HVY TO EXCESSIVE RNS WITHIN THE
THREAT AREA. ONE DOUBLE JET STRUCTURE ACRS THE GLF CST STATES
EARLY IN THE PD GIVES WAY TO A SCND DOUBLE JET STRUCTURE AS A
NEW SPEED MAX ROTATES THRU THE BASE OF THE TROF FRI AFTN/EVNG.
UPR JET SCENARIO WOULD SUGGESTS UPR LVL FORCING ACRS ERN TX
AND THE LOWER MS VLY SHUD REMAIN IN PLACE LEADING TO THE THREAT
OF REPEAT CELL ACTVTY. LCL 2-3 INCH RNS IN SVRL HRS ARE PSBL WITH
THE POTNL FOR ISOLD 4-6 INCH RNFL TOTALS DURING THE FCST PD.
WOLF
