textproduct: Caribou

WHAT HAS CHANGED

- WPC has included northern areas in a marginal risk for excessive rainfall for Saturday afternoon and Saturday night.

- Added isolated showers across the north this evening.

- Updated aviation and marine sections for 00Z

KEY MESSAGES

1) Thunderstorms, some severe producing damaging winds, will continue for the next hour or two mainly over Downeast areas.

2) Next chance for showers and thunderstorms will be Saturday afternoon into Sunday, with locally heavy rain possible Sunday night.

DISCUSSION

KEY MESSAGE 1...Thunderstorms, some severe producing damaging winds, will continue for the next hour or two mainly over Downeast areas.

KEY MESSAGE 1 DESCRIPTION... Main cold front located along the coast with temps dropping into the 60s behind it. Secondary cold front located along the St. Lawrence with dewpoints currently in the 30s. Ongoing thunderstorms will shift south over the waters by evening. These storms may still have the potential to produce damaging winds as they exit the area this afternoon.

KEY MESSAGE 2...Next chance for showers and thunderstorms will be Saturday afternoon into Sunday, with locally heavy rain possible Sunday night.

KEY MESSAGE 2 DESCRIPTION... The next chance for showers and storms is this weekend as low pressure moves in from the Great Lakes. Thinking that since the greatest forcing will arrive overnight, thunderstorms will be more isolated although cannot rule out some thunder with elevated instability Saturday night. PW values of 1.50+ inches, which is > 90th percentile for this time of year. Locally heavy rainfall is possible with any storm as storms train over the same area. QPF amounts range from 0.80-1 inch from Katahdin to Houlton north with 0.50-0.75 inches to the south. WPC has included the northern areas in a marginal risk for flash flooding mainly for Saturday night.

AVIATION /00Z FRIDAY THROUGH TUESDAY/

Tonight...VFR. W winds 5-15kts.

Friday-Friday night...VFR. NW winds 5-15kts gusting to 20-25kts, becoming light overnight.

Saturday...VFR early, then MVFR BHB, BGR and possibly HUL in -shra. S winds 5-15kts.

Saturday night...MVFR/IFR in locally heavy rainfall and storms. S winds 10-20kts. LLWS possible.

Sunday-Sunday night...VFR/MVFR. NW winds 10-20kts gusting to 25kts, then becoming W 5-10kts overnight.

Monday-Tuesday...Mainly VFR. W winds 5-10kts, becoming S Tuesday morning 5-15ts gusting to 20kts.

MARINE

Winds remain below SCA criteria with seas around 2-4 feet through Saturday afternoon.

Winds pick up out of the south Saturday evening and seas rise to 5-8 feet by early Sunday morning, so SCAs are likely during this timeframe. Cannot rule out gale force winds over waters from 25-60NM Saturday night. Seas drop below 5ft by Sunday evening and remain below small craft levels through Tuesday.

EQUIPMENT

GOES-19 is slowly coming back online with the ABI now operational. GLM will be returning shortly, along with systems associated with space weather.

CAR WATCHES/WARNINGS/ADVISORIES

ME...None. MARINE...None.