Based on the latest clear sky clocks and the 9 am NWS discussion, I
have decided not to head down to Fremont Peak tonight. I am still
holding out some hope for Saturday however. Tomorrow night has much
better seeing forecasts on the clear sky clocks, and also some
encouraging comments from the NWS discussion site
http://www.wrh.noaa.gov/afos/SFO/AFD/SFOAFDMTR NWS, (see below)).
David Kingsley
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
900 AM PST FRI DEC 26 2003
SATPIX INDICATE A BREAK IN SHOWER
ACTIVITY THIS AFTN BEFORE THE COMMA CLOUD PASSING 38/127 APPROACHES
THE DISTRICT THIS EVE. IT APPEARS TO BE ON A SIMILAR TRAJECTORY AS
THE CURRENT SHOWER ACTIVITY...MEANING THE CHANCE OF RAIN WILL BE
HIGHER ALONG THE COAST FROM MRY BAY S THAN ELSEWHERE. THIS SHOWER
TRAJECTORY IS QUITE COMMON IN THIS AREA UNDER THIS SYNOPTIC
PATTERN.
AFTER THE EVENING COMMA PASSES THRU THE DISTRICT SHOULD SEE A
COMPLETE BREAK IN THE RAIN FOR A WHILE LATE TNGT THRU SAT. MUCH OF
THE REGION SHOULD CLEAR OUT TNGT AND THE PRESSURE PATTERN WILL
BECOME FLAT...ALLOWING TEMPS TO TAKE A DIVE IN OUR COLD AIRMASS.
WITH NO LOW LEVEL TEMP INVERSION FOG IS UNLIKELY BUT FROST WILL BE
WIDESPREAD. SAT NIGHT WILL ALSO BE CHILLY...ESPECIALLY IN THE SRN
PART OF THE DISTRICT WHERE SKIES SHOULD REMAIN CLEAR MOST OF THE
NIGHT.