Sunrise 5:42 AM   Sunset 8:35 PM Moonrise 2:05 AM   Moonset 3:28 PM

  Print   HELP   Reset   Save   Recall  New

ANZ538 Patapsco River Including Baltimore Harbor- 734 Pm Edt Sun Jun 2 2024
Tonight - S winds 5 to 10 kt - .becoming sw late. Waves 1 ft or less. A chance of showers with a slight chance of tstms. Mon - S winds 5 kt. Waves flat. A chance of showers and tstms. Mon night - S winds around 5 kt. Waves flat. Tue - E winds 5 to 10 kt. Waves 1 ft or less. Tue night - SE winds 5 to 10 kt. Waves 1 ft. Wed - SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. Wed night - S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. Thu - SW winds 5 to 10 kt. Waves 1 ft or less. A chance of tstms. Fri - W winds 5 to 10 kt. Waves 1 ft. A chance of showers through the night.
winds and waves higher and visibilities lower in and near tstms.

ANZ500 734 Pm Edt Sun Jun 2 2024
Synopsis for the tidal potomac and md portion of the chesapeake bay -
shower and Thunderstorm chances return to the waters later today into the middle part of the workweek as a series of disturbances traverse the area. Small craft advisories may be needed for portions of the waters late tonight into Monday.

FXUS61 KCTP 030018 AFDCTP

Area Forecast Discussion National Weather Service State College PA 818 PM EDT Sun Jun 2 2024

SYNOPSIS
*Scattered showers this evening.
*Hit and miss showers and thunderstorms expected Monday and Tuesday as temperatures and humidity ramp up.
*More widespread rain on Wednesday and Thursday precedes a cooler weekend with scattered PM showers/storms.

NEAR TERM /UNTIL 6 AM MONDAY MORNING/
A mid level shortwave moving into Western PA is supporting a few showers across the region as of 23Z. Weak large scale forcing as inferred by model 500-300mb qvec convergence fields, combined with almost no cape per SPC mesoanalysis, suggests that coverage will remain sparse as the shortwave moves through late this evening.

Surging low level moisture, combined with a light upsloping flow, appears likely to result in persistent low clouds over the Allegheny Plateau overnight, with late night ridgetop fog possible. Further east, model RH profiles support partial clearing in the wake of the exiting shortwave late tonight.
However, lack of rain in most areas and mostly cloudy skies through a good deal of the night argue for a low risk of radiation fog south and east of the Alleghenies.

Cloud cover and surging dewpoints will result in a milder night than we've seen recently, with lows in the mid 50s over the N Mtns, to mid 60s across the Lower Susq Valley.

SHORT TERM /6 AM MONDAY MORNING THROUGH WEDNESDAY/
Upper level ridging building into PA favors warmer and drier weather Mon-Tue. However, isolated, diurnally-driven convection is possible both days. On Monday, the best chance of an afternoon shower/tsra is over the northeast part of the forecast area associated with a weak shortwave diving south across the Hudson Valley. The upper ridge is progged to lie directly over PA Tuesday, suppressing convection in general. However, can't rule out an isolated PM pulse-type shower/tsra forming on the ridgetops of Central PA.

Ensemble mean 850mb temps of around 14C supports high temps Monday ranging from the mid 70s over the highest elevations of the Alleghenies, to the mid 80s in the Lower Susq Valley.
Ensemble 850mb/2m temp plumes indicate highs may be a degree or two warmer Tuesday.

Clearing skies and a calm wind may promote patchy valley fog late Monday night, primarily in the favored deep/river stream valleys of North Central PA.

The next notable chance for rain arrives on Wednesday afternoon as a low pressure system drifting across the Great Lakes helps bring surging Gulf Coast moisture into the northeast. Increasing clouds on Wednesday will keep temperatures in check with highs most likely in the mid 70s to low 80s. The chance for showers and thunderstorms will increase into Wednesday evening.

LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/
Low pressure passing well to the north of the state in the latter part of the week will push a cold or occluded front thru most likely on Thursday. The upper feature driving this sfc feature is a deepening closed low. The weak moisture plume in advance of the front will result in mainly light precip. If we can manage to break into the warm sector, we should have some thunder Wed night and Thursday. Ensemble plumes suggest most likely areal average rainfall Wed- Thu is around a half inch with near zero chances of 1"/24hrs time (20pct). After the front passes, the rest of the long range period will be dominated by the big closed low. It is almost cutoff, but does inch eastward with time. Some guidance (incl Op GFS) has the center of the upper low cross NY/PA over the weekend. That would make a very showery time with mainly aftn TS/SHRA and limited heating.
However, 8H temps won't be too chilly, running just one std dev to the left (colder) for June.

AVIATION /00Z MONDAY THROUGH FRIDAY/
Rain showers should be east of the central PA airspace by 5-6Z as forcing wanes. MVFR ceilings will continue for the western airfields and develop farther east into UNV/AOO/IPT later this evening through tonight. Fog and IFR Ceilings will be possible late tonight/early Monday morning for these same spots as westerly flow results in upslope and stratus development.

Sunrise will bring an improvement to sub-VFR conditions at the central and eastern terminals. However, the western sites will take a couple of hours to rise to MVFR then finally VFR. The instability and left over moisture could spark a SHRA or two Monday afternoon, but coverage is not expected to be enough to warrant mention for any site. There is the possibility (15-20%)
for a TSRA at MDT/LNS/IPT in the afternoon, but again have kept mention out given the low probability at this time.

Outlook...

Tue...AM fog/IFR possible SE. Otherwise, no sig wx.
Wed...Sct SHRA/TSRA with restrictions possible PM.
Wed night-Thurs...CFROPA with numerous SHRA/TSRA. Flight restrictions likely (70%). IFR possible (30%).
Friday...AM fog poss, sct PM SHRA/TSRA.

CLIMATE
Prelim May and Spring 2024 Temperature & Precipitation Rankings

Harrisburg: T12th warmest; 76th driest May T3rd warmest; 33rd wettest Spring

Williamsport: 9th warmest; 22nd wettest May 4th warmest; 11th wettest Spring

Altoona: 9th warmest; 13th wettest May 2nd warmest; 3rd wettest Spring

Bradford: 4th warmest; 36th driest May Warmest; 21st wettest Spring

CTP WATCHES/WARNINGS/ADVISORIES
None.

toggle option: (graph/table)

Chain Bridge
Click for Map
Sun -- 03:02 AM EDT     Moonrise
Sun -- 05:28 AM EDT     3.49 feet High Tide
Sun -- 05:44 AM EDT     Sunrise
Sun -- 12:26 PM EDT     0.33 feet Low Tide
Sun -- 04:22 PM EDT     Moonset
Sun -- 05:57 PM EDT     3.02 feet High Tide
Sun -- 08:29 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Chain Bridge, D.C., Tide feet

Chain Bridge
Click for Map
Sun -- 03:02 AM EDT     Moonrise
Sun -- 05:23 AM EDT     3.49 feet High Tide
Sun -- 05:44 AM EDT     Sunrise
Sun -- 12:21 PM EDT     0.33 feet Low Tide
Sun -- 04:22 PM EDT     Moonset
Sun -- 05:52 PM EDT     3.02 feet High Tide
Sun -- 08:29 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Chain Bridge, one mile below, D.C., Tide feet

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

Sterling, VA,