MD Weather Alerts
Overnight Edition
Wednesday, August 26, 2026
Tonight is the calm before it — a mild, mostly cloudy night statewide with only a slight chance of an isolated shower near the Bay before sunrise, per NWS Baltimore/Washington’s 3:33 PM update. The real story is Thursday, when NWS Mount Holly has already issued a Flood Watch for parts of the I-95 corridor into New Jersey (Cecil County’s neighbors, not quite reaching us yet) and both LWX and PHI are watching for severe thunderstorms with damaging wind and hail as a warm front lifts through ahead of a cold front. Stay tuned — Thursday will be the headline day, not tonight.
Tonight’s Timeline
- Evening (7–10 PM): Clouds increase from west to east; a stray shower can’t be ruled out in the far southwestern mountains, but most of the state stays dry.
- Late night (10 PM–3 AM): Skies mostly cloudy statewide, warm and increasingly humid as a southerly flow deepens ahead of tomorrow’s warm front.
- Pre-dawn (3–6 AM): Isolated to scattered showers become possible near and along the Chesapeake Bay as moisture surges northward — the leading edge of Thursday’s action. Coverage and exact placement remain uncertain.
Region by Region
Western Maryland — Garrett & Allegany
Deep Creek and Oakland (Garrett) settle into the low 60s, around 61°, under partly cloudy skies with a light southwest breeze and barely a 2% rain chance — about as clean a mountain night as August offers. Cumberland (Allegany) drops to around 64°, partly cloudy, winds light out of the west. No impacts expected; a good night to leave the windows open one more time before Thursday’s humidity spike.
Northern & Central — Washington, Frederick, Carroll
Hagerstown holds around 68° overnight, mostly cloudy, south winds near 9 mph, with just a 4% shower chance — essentially dry. Frederick and Carroll run a touch warmer near 69°, mostly cloudy, a modest 12% chance of an isolated shower creeping in from the south late. Humidity is clearly building; this is the muggiest night this corridor’s had in a bit.
Baltimore Metro — City, County, Harford, Howard, Anne Arundel
Baltimore area lows sit around 72°, mostly cloudy transitioning to a slight chance of showers and storms (22%) toward daybreak as that warm front noses closer to the Bay. South winds 5-9 mph keep the air soupy. Nothing disruptive expected before sunrise, but keep an eye on radar if you’re up early — this is one of the zones NWS flagged for possible pre-dawn convection near the water.
DC Suburbs — Montgomery & Prince George’s
Silver Spring-area lows near 70°, mostly cloudy with a slight chance of rain showers developing toward early morning (16%). South winds 6-9 mph. A quiet, sticky night — the kind where you wake up to a t-shirt already clinging.
Southern Maryland — Charles, Calvert, St. Mary’s
Prince Frederick and environs bottom out near 71°, mostly cloudy, south winds around 9 mph, with a 12% shower chance. This is Bay-adjacent territory, so it’s one of the areas forecasters flagged for possible showers developing closer to sunrise as that warm front lifts north along the water.
Upper Eastern Shore — Cecil, Kent, Queen Anne’s, Talbot, Caroline
Easton-area lows near 72°, mostly cloudy, light south winds, a modest 6% shower chance overnight. Cecil County sits closest to Mount Holly’s forecast area and the newly issued Flood Watch corridor just to its north — nothing active here tonight, but it’s worth watching how that boundary behaves by tomorrow afternoon.
Lower Eastern Shore — Dorchester, Wicomico, Somerset
Salisbury-area lows near 71°, mostly cloudy, south winds around 7 mph, only a 3% rain chance — the quietest corner of the state tonight. Humidity is ticking up but skies stay largely benign until Thursday.
Ocean City & the Coast — Worcester
Coastal lows run mild, around 74°, mostly cloudy, south winds near 12 mph — noticeably breezier than inland. Rain chance overnight is low at 4%. Surf tonight holds at 1-2 feet with a Low rip current risk per the latest Surf Zone Forecast, but that shifts tomorrow: Thursday’s surf builds to 2-3 feet with rip currents rising to Moderate, so if you’re heading to the beach Thursday, mind the flags and swim near a guard.
Active Hazards
No watches, warnings, or advisories are active for Maryland at this time. NWS Baltimore/Washington’s Hazardous Weather Outlook confirms no hazardous weather is expected tonight. Note: NWS Mount Holly has issued a Flood Watch for the urban I-95 corridor from Wilmington, DE northward into New Jersey effective for Thursday — this does not currently include Maryland counties, but Cecil County residents should watch for updates given its proximity.
Severe & Flooding Outlook — Thursday
Thursday is shaping up as the more consequential day. A warm front lifting north tonight sets the stage for scattered morning showers, followed by a surface trough and approaching cold front that could spark thunderstorms — with some risk of severe storms — generally between the I-95 and I-81 corridors by mid-afternoon, spreading east and possibly not arriving until after sunset for areas near and east of I-95. Damaging wind gusts are the primary threat; some hail is possible given moderate lapse rates and strong upper winds, while the tornado threat remains uncertain due to limited low-level shear. Deep-layer shear of 25-35 knots and moderate instability support the severe potential. Heavy rain and localized flooding are secondary concerns — training storms are possible along the trough — though confidence in widespread flooding is low for Maryland at this time; PWAT values and warm cloud depths are described as modest. The severe threat should wind down by mid-to-late evening Thursday, with lingering showers possible overnight into Friday morning as the cold front finally clears the area.
Heat, Humidity & Winds
Dew points are climbing into the low 70s tonight as return flow off the Bay and Atlantic deepens — a distinctly muggier feel than recent nights, though nothing extreme yet. Winds stay generally light to moderate out of the south, 5-12 mph, strongest along the coast and Bay shoreline. No marine hazards are posted for the Chesapeake Bay, tidal Potomac, or coastal waters tonight.
Overnight Lows by Zone
| Zone | Low |
| Western Mountains (Deep Creek/Oakland) | Around 61° |
| Cumberland/Allegany | Around 64° |
| Hagerstown/Washington Co. | Around 68° |
| Frederick/Carroll | Around 69° |
| Baltimore/DC Corridor | 70-72° |
| Southern Maryland | Around 71° |
| Eastern Shore (Upper & Lower) | 71-72° |
| Ocean City | Around 74° |
Looking Ahead
Thursday: Warm and humid with highs pushing into the mid-to-upper 80s across most of the state (upper 70s to low 80s at Deep Creek and Ocean City). Scattered showers and thunderstorms develop, with a severe risk — damaging wind gusts and hail possible — mainly afternoon into evening along and near the I-95/I-81 corridors, spreading east. Friday: The cold front finally clears the area, with lingering showers near and south of the boundary in the morning before drier air works in; highs in the mid-80s inland, near 86° in central Maryland, upper 70s to near 80° at the coast where showers linger longest. Drier, more comfortable conditions are expected by the weekend, with a return to hot, humid, near-90s conditions with heat index values potentially near or above 100° arriving early next week as ridging builds over the Southeast.
Data: NWS Baltimore/Washington, Mount Holly & Wakefield.
MD Weather Alerts — sleep well tonight, Maryland. Thursday’s the day to keep an eye on the sky.