NWS Newport/Morehead City, NC wrote its last area forecast discussion before the first event at May 12, 6:01 AM EST, 6 hours 43 minutes earlier.
Area forecast discussion, May 12, 6:01 AM EST, 6 hours 43 minutes before
Area Forecast Discussion
National Weather Service Newport/Morehead City NC
701 AM EDT Mon May 12 2025
.SYNOPSIS...
A slow moving low will continue to bring an extended period of
unsettled weather to the area through mid week. This system will
eventually weaken and dissipate by then, with a ridge of high
pressure building in behind it by late week.
&&
.NEAR TERM /Through Today/...
As of 7 AM Mon...Inc pop trend is on track, as coverage and
intensity of showers and a few storms is inc in Onslow Bay and
will be moving ashore and expanding acrs the swrn zones, where
flood watch in effect starting 8a.
Prev disc... As of 4 AM Mon...An upper level low over the Deep
South will become negatively tilted today allowing for deep
moist convergence across ENC. Increasing lapse rates in the
vicinity of the upper level low will enable developing
instability despite only tepid surface heating. ML CAPE vals
only in the 500 - 1,000 J/KG range however, so no severe
expected. High PW's approaching 2" will pose a threat for areas
of heavy rain, esp where some banding of heavy showers or storms
occur. A long standing moderate drought is in place across most
of ENC, so no severe flooding is expected. With LPPM vals
reaching or exceeding 5" for swrn zones, there is some flood
threat despite the drought conditions, and thus have hoisted a
flood watch for these areas. This lines up where periodic sfc
ThetaE vals are highest and layer streamlines converge, and is
the reasoning for the watch.
&&
.SHORT TERM /Tonight/...
As of 4 AM Mon...A break in the heavier rain rates through
first part of the evening, before reinvigoration of heavier rain
rates arrives after 6Z with frontal forcing arriving first in
the Coastal Plain counties, and then further east towards
daybreak Tue. Heaviest rain rates are expected late tonight for
the watch area, and will extend through the night and first half
of Tue for this reason. Generally expecting widespread 2-3" for
most of ENC, though an axis of 3-4", locally to 5" for the
counties in the watch. Towards the OBX, lower amts of 1-2" or so
are expected.
&&
.LONG TERM /TUESDAY THROUGH SUNDAY/...
As of 3 AM Monday...
Aloft: An upper low will become progressively more negatively tilted
on Tuesday as it digs northeast across the OH River Valley. By late
Wednesday, this upper low will become absorbed into the shortwave
across the Mid-Atlantic states. The axis of the upper trough will
traverse ENC late Wednesday/early Thursday with weak upper ridging
briefly building in it's wake. A weak, quick hitting shortwave will
pass Friday night followed by another, slightly stronger shortwave
on Saturday with zonal flow taking over on Sunday.
Surface: At the surface, an occluded low will move northeast into
the OH River Valley with an additional low forming over western NC
in response to the upper trough becoming increasingly negatively
tilted. The warm front associated with the latter surface low will
lift north across ENC Tuesday into Wednesday, putting us firmly in
the warm sector. From there, the next FROPA won't be until Saturday,
although not much of an airmass change is expected.
Tuesday - Wednesday...The axis of greatest moisture will become more
progressive through the day on Tuesday, shifting the area of
heaviest rain from the southwestern counties in the morning to the
OBX by the afternoon. Given PWATs around 2" and the heavy rain
already occurring ahead of Tuesday's round, flooding will be a
concern, especially for areas south of US 70. The antecedent surface
conditions will work in our favor given the ongoing drought, but
efficient rain rates may still cause issues. Therefore, a Flood
Watch has been issued for Greene, Lenoir, Jones, Duplin, and Onslow
Counties and is currently in effect until 18Z Tuesday. Plenty of
moisture and lift will remain in the area on Wednesday, which will
support the continuation of likely to categorical PoPs.
Thunderstorms will be likely in the afternoon, especially along any
seabreeze boundary. And with a slightly drier column, rain rates
will not be as efficient as they will be on Tuesday.
Thursday - Sunday...Towards the end of the week, we'll return to a
typical summertime pattern with daily chances of isolated to widely
scattered showers and thunderstorms. Temperatures will steadily
climb through the week, reaching the 90s across the coastal plain
Friday and Saturday. These temps, accompanied by dews in the low-
70s, will generate heat indices ranging from 95-100+.
&&
.AVIATION /12Z MONDAY THROUGH FRIDAY/...
SHORT TERM /through tonight/...
As of 7 AM Mon...Increasing low level moisture and advancing
rain showers from the south will lead to lowering CIGs, with
MVFR conditions likely at all TAF sites. Local IFR possible at
times esp in heavier showers and storms. Increasing chances
for sporadic lightning today, and a prob30 for thunder in place
today. A break in the heavier showers first part of tonight,
before heavy showers and inc thunderstorm chances from the west
late tonight towards dawn Tue.
LONG TERM /Tuesday through Friday/...
As of 3:50 AM Monday...Prolonged periods of sub-VFR conditions
are possible throughout the period given the active pattern at
play. The heaviest rain will occur on Tuesday, but daily chances
for showers and thunderstorms will persist.
&&
.MARINE...
SHORT TERM /through tonight/...
As of 4 AM Mon...Winds will be generally, SE at 10-15 kts
through tonight, and then increase to SE 15-20 kts with frequent
gusts to 25+ kts starting this afternoon first for the coastal
waters south of Oregon Inlet, and then Pamlico/Croatan/Roanoke
sounds tonight. Seas will be 2-5 ft through the morning, and
then increase to 4-6 ft this afternoon.
LONG TERM /Tuesday through Friday/...
As of 3:55 AM Monday...Dangerous boating conditions will persist
through Tuesday. 15-25 kt southeasterly winds will gust to 25-30 kt
on Tuesday with seas building to 6-8 ft. By Wednesday morning, the
winds will have veered to the southwest, decreasing to 5-15 kt and
seas dropping to 3-4 ft.
&&
.HYDROLOGY...
As of 4 AM Mon...Storm total rainfall is expected to be in the
2-3" range for much of ENC, though an axis of 3-4", locally to
5" for Duplin, Onslow, Jones, Lenoir, and Greene counties, where
a flood watch is in effect through early Tuesday afternoon.
Towards the OBX, lower amts of 1-2" or so are expected.
&&
.MHX WATCHES/WARNINGS/ADVISORIES...
NC...Flood Watch through Tuesday afternoon for NCZ079-090>092-198-
199.
Beach Hazards Statement through this evening for NCZ195-196-
199-204-205.
MARINE...Small Craft Advisory from 2 AM to 8 PM EDT Tuesday for AMZ135.
Small Craft Advisory from 7 AM Tuesday to 4 AM EDT Wednesday
for AMZ150.
Small Craft Advisory from 8 PM this evening to 8 AM EDT
Wednesday for AMZ152-154.
Small Craft Advisory from 2 PM this afternoon to 4 AM EDT
Wednesday for AMZ156-158.
Small Craft Advisory from 5 AM to 8 PM EDT Tuesday for AMZ231.
&&
SYNOPSIS...MHX
NEAR TERM...TL
SHORT TERM...TL
LONG TERM...RCF/OJC
AVIATION...TL/OJC
MARINE...TL/OJC
HYDROLOGY...MHXSpecial weather statement, May 12, 12:07 PM EST, 37 minutes before
Special Weather Statement
National Weather Service Newport/Morehead City NC
Issued by National Weather Service Wilmington NC
107 PM EDT Mon May 12 2025
NCZ092-195-198-199-121745-
Coastal Onslow NC-West Carteret NC-Jones NC-Inland Onslow NC-
107 PM EDT Mon May 12 2025
...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN JONES...SOUTHERN
CRAVEN...EAST CENTRAL ONSLOW AND WEST CENTRAL CARTERET COUNTIES
THROUGH 145 PM EDT...
At 107 PM EDT, Doppler radar was tracking a strong thunderstorm over
Hammocks Beach State Park, or 14 miles southeast of Camp Lejeune
Center, moving northwest at 15 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Jacksonville, Piney Green, Camp Lejeune Center, Stella, Swansboro,
Hubert, Cape Carteret, Silverdale, Midway Park, Kuhns, Peletier,
Hammocks Beach, Hammocks Beach State Park, and Cedar Point.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3474 7741 3486 7711 3483 7711 3483 7710
3464 7704 3456 7723
TIME...MOT...LOC 1707Z 152DEG 15KT 3461 7714
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
SGK