Pertinent parts of the
HPC Model Diagnostic Discussion
(Model initialization section)
Quote:
TROPICAL DISTURBANCE NR CNTRL AMERICAN ISTHMUS...
THE NAM LOOKS A LITTLE STRONG AND TOO CLOSED PER THE SFC OBS IN
THE REGION AND THE MOST RECENT TAFB SFC ANALYSIS FOR THE REGION
ALL OF WHICH INDICATE A SHEARLINE/SFC TROUGH...NOT A SFC LOW. A
MORE SIGNIFICANT DISTURBANCE WITH A BETTER UPPER LEVEL ENVIRONMENT
IS SEEN SSW OF THE GULF OF TEHUANTEPEC IN THE EASTERN TROP PACIFIC
AND IS DEPICTED W/A SFC LOW.
(Model trends section)
Quote:
TROPICAL DISTURBANCE NR CNTRL AMERICAN ISTHMUS...
THE NAM IS SHOWING SURPRISINGLY GOOD CONTINUITY OVR ITS PAST 24
HRS OF RUNS IN MOVG A LOW OFF CNTRL AMERICA INTO THE NORTHWEST
CARIBBEAN AND ONWARD THRU THE YUCATAN PENINSULA. THE ECMWF HAS
BEEN CONSISTENT IN FORMING THE CURRENT SYS ON THE PAC SIDE OF THE
ISTHMUS OVR ITS PAST COUPLE DAYS OF RUNS AND KEEPS IT
QUASI-STATIONARY. THE NAM PARALLEL/WRF HAS SHIFTED A BIT
SWWD...ROUGHLY 200 NM... FROM ITS 06/12Z SOLN.
(Model preferences section)
Quote:
TROPICAL DISTURBANCE NR CNTRL AMERICAN ISTHMUS...
CONSIDERING THE CURRENT ACTIVITY ON THE PACIFIC SIDE OF THE
ISTHMUS...THE ECMWF/GFS SOLNS ARE CONSIDERED MORE LIKELY THAN THE
NAM AND NAM PARALLEL SOLNS... WHICH IS SUPPORTED BY THE 24 HR
TREND SEEN IN THE NAM PARALLEL CONTINUING TO FAVOR THE GYRE ON THE
PACIFIC SIDE OVR ANY PSBL DVLPMTS IN THE NWRN CARIBBEAN/GULF OF
MEX THROUGH 84 HRS. THE CANADIAN CONTS TO BE DISCOUNTED. SEE THE
TWOEP /TROPICAL WEATHER OUTLOOK/ AND PMDEPD /MEDIUM RANGE
DISCUSSION/ FOR MORE THE LATEST ON THIS DISTURBED AREA AND THE
PREFERRED SOLN FROM DAY 3 ONWARD RESPECTIVELY.