textproduct: Charleston

WHAT HAS CHANGED

There are increasing indications that some shallow ground fog could impact the region early Wednesday morning. Significant fog development does not appear likely given 1000 hPa condensation pressure deficits are progged to remain rather high, but some very localized dense fog can not be completely ruled out. A mention of "patchy fog" introduced to account for about a 3-6 hour time period prior to daybreak.

KEY MESSAGES

- 1) Rain-free conditions dominate this week as high pressure prevails.

DISCUSSION

KEY MESSAGE 1: Rain-free conditions dominate this week as high pressure prevails.

Quiet weather conditions will remain across the region as sfc high pressure nudges across the area from the nearby Atlantic under ridging building aloft. High temps remain on track to be near normal this afternoon, peaking around the upper 70s north to lower 80s along/south of the I-16 corridor. High temps are expected to warm above normal mid to late week as a southwest wind occurs under broad ridging aloft, reaching the mid-upper 80s away from coastal areas. Unfortunately, no rainfall is forecast across the local area until a front arrives late weekend and moisture return remains modest, suggesting RH values dropping into the 20s west of I-95 each afternoon through Friday. While RH values are critical, winds are expected to top out in the 10-15 mph range (mostly near the coast with a sea breeze), thus no fire weather headlines are in effect at this time. However, its encouraged to exercise caution if burning and heed any local burn bans as conditions remain very dry during the week.

AVIATION /00Z WEDNESDAY THROUGH SUNDAY/

22/00z TAF Discussion: KCHS/KJZI/KSAV: VFR for much of the period. Some shallow ground fog could produce some localized reduced vsbys at all terminals early Wednesday morning. ASOS/AWOS observations at KSAV (when observers are not on site) and KJZI could produce some highly variable vsbys at times, but the shallow nature of any fog layer should not impact operations.

Extended Aviation Outlook: VFR conditions will prevail through Friday with a sea breeze likely to occur each afternoon. A few showers and/or thunderstorms could impact the terminals late Saturday.

MARINE

High pressure centered across the Mid-Atlantic will slowly shift south with a weakening cold front during the next few days, favoring in a southerly flow across local waters for much of the week. Wind speeds should generally remain around 10-15 kt or less with some slight enhancement along the land/sea interface where a daily sea breeze develops, then shifts inland. Seas between 2-4 ft this afternoon (largest across outer Georgia waters) should range between 2-3 ft Wednesday through late week. A few showers and thunderstorms could arrive this weekend.

CHS WATCHES/WARNINGS/ADVISORIES

GA...None. SC...None. MARINE...None.