Area Forecast Discussion
Issued by NWS Wakefield, VA

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
143 FXUS61 KAKQ 240925 AFDAKQ Area Forecast Discussion National Weather Service Wakefield VA 425 AM EST Sat Feb 24 2018 .SYNOPSIS... A warm front will slowly lift north through the local area this morning as another front slowly drops into northern portions of the area late in the day. High pressure prevails off the Southeast coast tonight and Sunday. A cold front crosses the Mid Atlantic Sunday night and settles across North Carolina Monday. && .NEAR TERM /THROUGH TONIGHT/... A weak frontal bndry remains over the area this morning, and with light winds and moist low- levels, fog is widespread across the area. Greatest chance for vsbys aob 1/4 mi will be over SE areas and the Lwr Eastern Shore where dewpts are higher. The fog should end over most areas by mid morning. Another frontal bndry is expected to drop into northern portions of the fa late in the day, and with some increase in WAA and deep moisture, -RA is psbl over the NW half of the fa. PoPs range from near 30% at RIC/SBY to 60% farthest NW areas. Temp forecast again tricky today due to the widespread low cigs expected early in the day and uncertainty over how far north the clearing makes it. For now will forecast highs near 60 over the Lwr MD Eastern Shore to the mid/upr 70s southern half of the fa. Remaining mild with lows in the 50s to around 60. Best chances for light rain again over northern areas. && .SHORT TERM /SUNDAY THROUGH MONDAY/... A cold front approaches from the W Sunday morning. This front should be slow to cross the area given the strength of the ridge, so have opted for an evening frontal passage. Very warm Sunday with high temperatures in the mid 70s to low 80s, with low/mid 70s over the Ern Shore, and locally mid/upper 60s for the MD Beaches. See the climate section for record highs. The best upper level forcing lifts well N of the area, so PoPs at this time are only 30-50% ahead of and along the front. The cold front drops across the area Sunday night and settles over NC Monday. A secondary low pressure tracks along the front along with some mid-level energy and this could bring a period of light rain, mainly across the srn VA and NE NC. Cooler behind the front, but still above normal with lows Sunday night in the 50s and highs Monday in the upper 50s to lower 60s, but these values could fall during the day. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... The cold front pushes offshore with some lingering shwrs along the se coast Mon eve. Pt cldy/cooler. Lows in the mid 30s to mid 40s. High pressure over the area Tue shifts offshore Tue nite and Wed. Dry thru 18Z Wed with isltd shwrs psbl across the Piedmont Wed aftrn as moisture returns from the SW. Highs Tue mid 50s-lwr 60s. Lows Tue nite 40-45. Highs Wed upr 50s-mid 60s. Low pressure moves NE into the Gt Lakes region mid week with the advancing warm front lifting north across the region Wed nite and trailing cold front Thurs. Models show a decent moisture feed into the systm from the sw so will carry likely pops (shwrs) for both periods. Kept thunder out of forecast as that will depend on the actual timing of the cold frontal passage. Lows Wed nite mid 40s-lwr 50s. Highs Thu upr 50s- upr60s. Chc pops Thu nite as upr level systm is slow to track across the nrn Mid Atlantic region. Lows in the 40s. Cyclonic flow Fri will usher in a drier/cooler airmass but shwrs linger across the ern shore as the upr level systm slowly pulls offshore. Highs in the 50s to near 60 se. && .AVIATION /10Z SATURDAY THROUGH WEDNESDAY/... A warm front will remain over the region early this morning. Widespread IFR to LIFR ceilings have developed along and north of the boundary. Expect for the low stratus to persist through through the morning hours, gradually improving from south to north as the front lifts through the region. Ceilings are generally expected to improve to VFR by this afternoon, but IFR ceilings may linger across the north (including SBY) for much of the day. Visibilities have also fallen off at many of the sites near the coast, and the patchy fog will likely spread further inland. Expect visibilities in the 1 to 3 nm range at all TAF sites with periods of lower visibilities, especially near the coast. Visibilities are expected to gradually improve later this morning. The warm front eventually lifts north of the region by tonight/early Sunday. Generally light and variable winds overnight, becoming southwest later this morning. Outlook: A cold front crosses the region Sunday night into Monday bringing the potential for ceiling and visibility restrictions along with periods of light rain. High pressure settles over the area Tuesday and slides offshore Wednesday. && .MARINE...
-- Changed Discussion --
Light S winds early this morning, with warm/moist air over the colder waters continuing to lead to areas of dense fog. Maintaining dense FOG advisory and have added remaining upper James/York/Rappahannock rivers through 10 am for all zones (this may need to be extended in time across the north where fog is expected to be slower to dissipate). Otherwise, offshore high and SSW winds dominate today into tonight, though with another backdoor cold front sagging south into the northern waters late this aftn into tonight (winds will shift to the E in these areas). Front lifts back N overnight/Sun morning with a breezy SW flow on Sunday. Expect the warm airmass over cold water inversion to keep mixing limited, but still may see some gusts to around 20 kt during the day over much of the area. Marginal SCA headlines may be issued as needed. The next cold front crosses the waters Sun night with a wind shift back to the N-NE for Mon. No real CAA surges noted behind the front, so kept winds/seas below SCA levels, but will probably have a few hrs worth of elevated winds early Monday behind the front, and again Mon night/early Tue as sfc high pressure builds into the area from the WNW.
-- End Changed Discussion --
&& .CLIMATE... Very warm temperatures will return today and especially Sunday, Record highs are listed for today/Sat 2/24. For Sun 2/25, both record highs and record high mins are listed: * Record Highs........Record Highs/Rec High Mins * Site: Sat 2/24......Sun 2/25 * RIC: 82 (1985).....83 (1930)...54 (1930) * ORF: 82 (2012).....81 (2017)...59 (1930) * SBY: 77 (2012).....80 (1930)...52 (1930) * ECG: 79 (1985).....78 (2017)...54 (1985) && .AKQ WATCHES/WARNINGS/ADVISORIES...
-- Changed Discussion --
MD...None. NC...None. VA...None. MARINE...Dense Fog Advisory until 10 AM EST this morning for ANZ630>638- 650-652-654-656-658.
-- End Changed Discussion --
&& $$ SYNOPSIS...MAS NEAR TERM...MAS SHORT TERM...AJZ/MAS LONG TERM...AJB/MPR AVIATION...AJB/MAS MARINE...LKB CLIMATE... is the U.S. government's official web portal to all federal, state and local government web resources and services.