textproduct: Newport/Morehead City

WHAT HAS CHANGED

Marine headlines have been adjusted for start-end times. Next batch of Coastal Flood Headlines have gone out. Aviation Disco updated.

KEY MESSAGES

1) Breezy NE winds and high astronomical tides will bring the potential for additional coastal impacts Friday into into early next week.

2) Dry with cooler than avg conditions continue through the weekend.

Marine: Strong north to northeast winds and large seas will continue to bring hazardous boating conditions into next week.

DISCUSSION

KEY MESSAGE 1...Strong high pressure building into the Mid-Atlantic and low pressure well off the SE coast will result in a period of breezy to strong NE winds returning tonight through early next week with strongest winds along the coast, especially south of Cape Hatteras where gradients will be tightest. This, combined with upcoming King Tide cycle could lead to additional minor coastal impacts (coastal flooding and rough surf).

For Hatteras Island, long period swells have subsided slightly to around 6-8 ft, however with increasing NE winds, seas are expected to build up to 7-9 ft tonight and continue through the weekend. This will continue to bring the threat of ocean overwash to vulnerable areas where the dune structure has been compromised, especially around the times of high tide. For ocean-side: tonight's high tide is around 6 pm this evening and between 6 and 7 AM Saturday. Soundside high tides range from 2 to 3 hours behind the oceanside tides. The National Parks Service and NCDOT have reported substantial beach erosion from south Nags Head to Buxton, along with significant overwash occurring on side streets in Rodanthe. Due to hazardous road conditions and flooding, NC-12 remains closed from the Marc Basnight Bridge to Rodanthe.

The region is also entering a King Tide cycle this weekend that will continue through next week. Expect higher than normal tide cycles with minor "sunny day" coastal flooding across much of the tidal regions of ENC around times of high tide. The areas most susceptible to street flooding will be low lying areas along the Neuse and Bay rivers as well as Downeast Carteret County to North Topsail Beach as persistent moderate NE winds will contribute to additional waters rises. The morning high tide will be the highest of the daily tides this weekend and next week with the King Tide peaking TUE and WED.

Because of all this and the minor localized flooding that was already seen with this morning's high tide, have extended the pre- existing Coastal Flood Advisory for Hatteras Island through the remainder of the weekend. Have also issued new coastal flood advisories starting with tomorrow morning's high tide for Northern Outer Banks, Ocracoke, the entire Crystal Coast, and the areas adjacent to Neuse and Bay Rivers (Southern Craven and Pamlico counties) lasting through Monday morning's high tide. As stated above, the King Tide will peak TUE and WED, so these advisories will likely need to be extended from their current end times, but didn't want to to go out that far just yet to see if just an extension will suffice or if a Coastal Flood Warning would be warranted for the MON-WED timeframe.

KEY MESSAGE 2...Pleasantly cooler air mass will remain with us through the next several days with temps continuing near to slightly below climo. Maximum temperatures through the period are expected to remain in the mid 60s to lower 70s range.

Good radiational cooling conditions last night led to lows in the low to mid 30s across the bulk of the FA. Slightly more cloud coverage tonight and NE winds will bring light mixing during the overnight hours tonight through the weekend, keeping temps from dropping as much as the previous two nights. Generally expect overnight lows from the mid 40s inland to the 50s to around 60 along the coast. These temps and winds should preclude any frost development.

AVIATION /18Z FRIDAY THROUGH WEDNESDAY/

FR conditions are forecast to prevail through the TAF period though there is at least a slight chance of some spotty MVFR CIGs, most likely overnight. NE winds ~10G15-20 kt as gradients begin to tighten with high pressure build in from the north. Have seen STCU begin to advect into the region late today and tonight. Have shown the lower cloudbases this evening and into SAT morning, but have left prevailing lines at FEW or SCT. Have included a tempo group for MRH due to MVFR CIGs with them having the greatest chance, but still not high enough confidence to include a prevailing line here.

Outlook (Saturday through Tuesday): Generally, expect VFR conditions to continue through the next several days with strong high pressure building in from the north. However, coastal sections could see MVFR STCU at times. Breezy NE winds are expected to continue into early next week.

MARINE

High pressure will build in from the north will act to tighten the pressure gradients across the region with NE winds increasing to 15-25 kt with gust around 25-30 kt this afternoon and tonight. The strongest winds will be across the offshore waters south of Cape Hatteras where gusts up to 35-40 are expected late this afternoon through much of tonight and continue the Gale Warning for these zones. Nearshore waters S of Ocracoke Inlet will likely see some 35kt gusts, but this is expected to be a rather small window and confined to the 15-20nm range of these zones this evening into the first of tonight. With relatively shortlived conditions being confined to less than half of the zone, have opted to leave the SCA in place for these zones but have allowed gale gust wording in the Marine Headline text product (MWW). All other SCAs remain in place with minor adjustments to start/end times.

Outlook (Saturday through Tuesday): Tightened pressure gradients between strong high pressure over the Mid-Atlatic states and low pressure well off the Southeast coast will continue to bring moderate to strong N to NE winds across the waters bringing a prolonged period of SCA conditions across the waters into early next week. Gradients will be tightest across the southern waters and could see additional periods of Gale Force conditions Saturday night into Monday with highest probability across the outer waters south of Cape Hatteras as well as near shore Onslow Bay.

MHX WATCHES/WARNINGS/ADVISORIES

NC...Coastal Flood Advisory from 5 AM Saturday to 11 AM EDT Monday for NCZ094-194>196-199-203-204. Beach Hazards Statement until 8 PM EDT this evening for NCZ203- 205. Coastal Flood Advisory until 11 AM EDT Monday for NCZ205. MARINE...Small Craft Advisory until 8 AM EDT Saturday for AMZ131-230- 231. Small Craft Advisory until 6 PM EDT Monday for AMZ135. Small Craft Advisory until 6 AM EDT Monday for AMZ137. Small Craft Advisory until 6 AM EDT Wednesday for AMZ150-152- 154-156-158. Gale Warning until 9 AM EDT Saturday for AMZ184-186. Gale Warning until 10 AM EDT Saturday for AMZ188.