Area Forecast Discussion
Issued by NWS Wakefield, VA

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373 FXUS61 KAKQ 210827 AFDAKQ Area Forecast Discussion National Weather Service Wakefield VA 427 AM EDT Mon May 21 2018 .SYNOPSIS... A weak frontal boundary slips south across most of the area early this morning, then stalls over southern Virginia this afternoon. The front lifts back north as a warm front late tonight into Tuesday. A more pronounced cold front will cross the region on Wednesday, followed by a period of dry weather Thursday and Friday under the influence of high pressure. && .NEAR TERM /THROUGH TONIGHT/... As of 355 AM EDT Monday... Latest analysis indicates a weak sfc cold front now through the MD eastern shore, situated from central VA to the VA eastern shore. Flow aloft is rather light and from the W to WSW with weak upper trough over the Gulf of Mexico and ridging well off the SE US coast. Thus, the front will struggle to move south of the region today and is progged to stall across south central VA. As is typical w/ the fronts, it should buckle farther south along the coast and shift the winds to the NE across Hampton Roads. High res models depict quite a bit of QPF over interior SE VA and NE NC from mid morning into the aftn, even as instability parameters weaken due to the onshore NE flow. Have raised PoPs to high chance to likely during this period, gradually shifting the highest PoPs to south central VA and interior NE NC during the aftn. Meanwhile, should be a sharp cutoff in PoPs to the N of these zones, going dry over the N/NE and only about a 20% PoP this aftn for Richmond and Norfolk. highs today will avg in the lower 80s interior VA, to the 70s along the coast and over NE NC. Upper low to the S moves east and winds aloft shift to the SW overnight. Models have backed off on deep lift and moisture, but still will maintain 30-40% PoPs most areas as the front drifts NE slowly. Lows in the upper 50s ern shore to the mid 60s S/SW. && .SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/... As of 355 AM EDT Monday... Sfc high pres off the SE CONUS coast remains in control Tue while lo pres and its accompanying cold front tracks through the Midwest-OH Valley. VRB clouds-partly sunny Tue w/ mainly diurnal PoPs (20-50%) (Tue) ahead of that system, but PoPs have will be highest later in the day NNW locations. Highs Tue from the m-u70s at the coast to 80-85F inland. A more pronounced cold front crosses the area (late) Tue night through Wed accompanied by SCT to numerous SHRAS/tstms. Will have PoPs mainly 30-60%...w/ highs from the 70s-around 80F at the coast to the m80s inland. Drying from the NW to SE after sunset Wed with mainly dry conditions all areas after midnight as airmass turns much drier. Lows Wed night in the 50s N to the 60s S. && .LONG TERM /THURSDAY THROUGH SUNDAY/... As of 300 PM EDT Sunday... Any lingering showers/t-storms move south of the area by Thursday morning as a cold front passes through VA and NC. Behind the cold front, sfc high pressure settles into the Mid-Atlantic region Thu-Fri. This will give us a short break from the rain. Moisture starts to stream northward next weekend as southerly flow returns to the region. Therefore, rain is in the forecast from Saturday afternoon through the remainder of the weekend. Expect isolated-scattered afternoon showers/t-storms on Saturday with more widespread showers/t-storms returning Sunday through Memorial Day. Currently have slight chc PoPs Sat PM-Sun AM with PoPs increasing to ~40% Sunday afternoon through Monday. Highs in the low 80s inland/upper 70s in coastal areas on Thursday. Warmer with highs in the mid-upper 80s expected Friday through Sunday. Lows in the low-mid 60s on Fri/Sat morning increasing to ~70 on Sun/Mon AM. && .AVIATION /08Z MONDAY THROUGH FRIDAY/... As of 200 AM EDT Monday... A weak front is now pushing into the Delmarva and will drop south through the region through 12Z. At kSBY winds are light/variable and will soon shift to the N. Elsewhere, winds are relatively light from the SW and will shift to the NNW and then the NE from 09-12Z (except after 12Z at KECG). Patchy IFR/MVFR stratus and MVFR vsbys will be possible a few hours either side of 12z this morning. The front becomes located from the VA Piedmont to NE NC by aftn. Chance for showers by this aftn/evening are 30-40% for KECG, ~20% for KRIC/KPHF/KORF, and <10% for SBY. Tstms look rather unlikely through 00Z given the onshore flow but there is a slight chance at KECG and along/west of I-95 including KRIC. The boundary returns N as a warm front across the local area late tonight/early Tuesday with a potential for showers and isolated tstms (PoP 20-50%) though did not include this in TAFS yet. Aftn/evening showers/tstms are possible Tuesday and Wednesday. A moist airmass will remain over the region and a potential will exist for patchy early morning fog and/or stratus. High pressure looks to build in from the N by Thursday and Friday bringing mainly VFR conditions during the end of the week. && .MARINE... As of 420 AM EDT Monday... No headlines in the short term today thru Tue night. A weak frontal boundary will drop south into the NE NC waters during today. Winds will become NE or E arnd 10 kt or less over the waters behind the boundary. Seas will range fm 2 to 4 ft and waves 1 to 2 ft during today. The boundary will lift back north as a warm front tonight thru Tue morning, with the winds turning fm SE to S or SW. Expect SW winds 5-15 kt Tue night, then W or SW Wed into Wed evening, before shifting to the NW then N Wed night into Thu morning, as a cold front drops thru the region. Winds and waves/seas are still expected to remain below Small Craft Advisory criteria thru much of the week. && .HYDROLOGY... As of 420 AM EDT Monday... Flood warnings continue for the James and Appomattox River basins. Warnings also continue for the Meherrin and Nottoway rivers (at Stony Creek), as well as portions of the Chowan Basin. Additional flood warnings continue for the Chickahominy, South Anna and Mattaponi rivers, as well as the Pocomoke River in MD. See FLWAKQ or FLSAKQ for more details. && .CLIMATE... As of 355 AM EDT Monday... * RIC monthly rainfall total through 5/20 remains at 8.84" (already ranks as 5th wettest May on record). (precipitation records date back to 1880) * SBY monthly rainfall total through 5/20 is now 8.52" (already ranks as 3rd wettest May on record). (precipitation records date back to 1906) && .AKQ WATCHES/WARNINGS/ADVISORIES... MD...None. NC...None. VA...None. MARINE...None. && $$ SYNOPSIS...LKB NEAR TERM...LKB SHORT TERM...ALB/LKB LONG TERM...ERI AVIATION...LKB MARINE...TMG HYDROLOGY...AKQ CLIMATE...AKQ is the U.S. government's official web portal to all federal, state and local government web resources and services.