Good morning. Grab the coffee and keep an eye on the sky today — this is a real weather day. NWS Baltimore/Washington (2:55 AM update) and NWS Mount Holly both have their eyes on a warm front lifting through this morning followed by a cold front arriving with enough instability and shear to produce severe thunderstorms this afternoon and evening, mainly along and east of the I-81/I-95 corridors. Damaging wind is the top concern, large hail is possible, and — notably — the Storm Prediction Center has tagged northeastern Maryland with a 2% tornado risk, worth mentioning even though it’s a low-end number. Southern Maryland’s NWS Wakefield office, by contrast, is trending drier with just isolated activity. It’s a state divided today.
Timing: Hour by Hour
- Pre-dawn to 9 AM — Showers already sliding into Cecil County and northeast MD ahead of a warm front, building slowly southwest through the morning.
- 9 AM–Noon — Warm, increasingly humid air surges north; a few showers linger over the I-95 corridor and points north, but coverage should stay patchy through midday.
- Noon–4 PM — Peak heating combines with a building surface trough between I-95 and I-81. This is the window for the first thunderstorm development, favoring central and western MD.
- 4–8 PM — Primary severe window. Damaging wind gusts and isolated large hail are the main threats; an isolated tornado can’t be ruled out, especially near the MD/PA line in Cecil and Harford counties.
- 8 PM–Midnight — Activity should gradually weaken as it pushes east/southeast, though a few storms may linger into the overnight, especially toward the Bay and Eastern Shore.
Region by Region
Western Maryland
Garrett County (Deep Creek/Oakland): High near 78° — mid 70s to near 80, mostly sunny early, then isolated afternoon/evening showers and a rumble of thunder (19% chance). Winds light out of the southwest, 3-7 mph. Overnight lows drop to 59°, with patchy fog developing after any showers clear.
Allegany County (Cumberland): High 87° — mid-to-upper 80s, mostly sunny before scattered showers and thunderstorms move in during the afternoon (36% chance). Some of these could be on the stronger side given decent instability. Lows near 63° overnight with lingering shower chances and fog toward daybreak.
Northern & Central Maryland
Washington County (Hagerstown): High 88° — upper 80s, muggy, with scattered strong to severe storms likely during the afternoon and evening (56% chance). This is squarely in the higher-confidence severe zone. Lows near 66° with lingering storm chances (63%) tapering toward fog after midnight.
Frederick County: High 88°, same setup — a few morning showers give way to a more organized round of scattered thunderstorms by afternoon (55%), continuing into the evening (63% overnight). Lows around 67°.
Carroll County: Essentially matching Frederick’s numbers — high near 88°, scattered strong storms likely mid-afternoon into evening, low near 67° overnight with lingering shower/storm chances.
Baltimore Metro
Baltimore City & County, Harford, Howard, Anne Arundel: High 88° with a 64% chance of scattered showers and thunderstorms, some capable of damaging wind gusts, primarily afternoon into evening. Harford County — especially the northeastern reaches near the PA line — carries the isolated tornado watch-word today given favorable low-level curvature; keep the weather radio charged. Winds south 3-10 mph ahead of storms, gusty within any cells. Overnight low 70°, with a continued 61% chance of showers/storms lingering past midnight.
DC Suburbs
Montgomery & Prince George’s Counties: High 88°, scattered strong to severe thunderstorms likely (53%), mainly afternoon through evening with a southerly breeze around 6-9 mph feeding the humidity. Overnight low 69° with a 60% chance storms continue into the evening hours before tapering after midnight.
Southern Maryland
Charles, Calvert, St. Mary’s: High near 87° with a 35% chance of scattered showers and storms, mainly afternoon — a notch lower confidence than points north, per Wakefield’s drier trend for the far southern zone. Southerly winds 6-12 mph. Overnight low 70°, storm chances continuing near 41% into the evening.
Upper Eastern Shore
Cecil, Kent, Queen Anne’s, Talbot, Caroline: High 86° with a 33% chance of showers and thunderstorms — Cecil County is the one to watch closely given its position under the tornado-tagged corridor near the PA line this afternoon/evening. Southerly wind 5-10 mph. Overnight low 70° with continued 40% storm chances after dark.
Lower Eastern Shore
Dorchester, Wicomico, Somerset: A quieter day here — high 87° with just a 20% slight chance of showers/storms, mainly afternoon. South wind 5-12 mph. Overnight low near 71°, with only a 16% chance of lingering showers.
Ocean City & the Coast
Worcester County / Ocean City: The calmest corner of the state today — high near 81°, partly sunny, only an 8% shower chance. South wind 8-14 mph. Beach conditions: surf 2-3 feet, water in the mid 70s, UV Very High, and a Moderate Rip Current Risk in effect from 8 AM through this evening — swim near a lifeguard and don’t fight a rip current sideways out of it. High tide at the Ocean City Fishing Pier is 7:33 AM, low tide 1:38 PM. Overnight low near 74° with mostly cloudy skies.
Active Hazards
No formal NWS watches, warnings, or advisories are active for Maryland as of this writing. That said, the Storm Prediction Center has included northeastern Maryland (Cecil/Harford) in a 2% tornado risk area for today, and the atmosphere supports scattered severe thunderstorms capable of damaging wind gusts and large hail across the northern and central part of the state this afternoon and evening. Treat this as an unofficial but real threat — if storms fire, expect Severe Thunderstorm Warnings, and possibly a Tornado Warning, to be issued in real time.
Severe & Flooding Threat
The primary severe threat window runs roughly 2 PM to 9 PM today, focused on a surface trough setting up between I-95 and I-81. Moderate instability paired with 25-35 knots of deep-layer shear supports organized clusters capable of damaging straight-line winds as the top threat, with hail also possible given decent mid-level lapse rates. Low-level hodograph curvature near the MD/PA border keeps that isolated tornado threat on the table, mainly Cecil and Harford counties. Flash flooding is not a major concern in Maryland today — precipitable water values and warm cloud depths are more modest here than they are farther north into PA/NJ, where a Flood Watch has been issued (not applicable to Maryland). Still, any training storms could produce a quick localized downpour, so don’t drive into a flooded road regardless.
Heat, Humidity & Winds
Dew points climbing into the low 70s today will make it feel sticky and heavy well ahead of any storms — a classic late-summer, pre-frontal muggy afternoon. Winds ahead of the front run south around 6-12 mph, gusting higher within and ahead of any thunderstorm outflow. No excessive heat is expected today; the bigger heat story arrives early next week.
Chesapeake Bay & Marine
Southerly winds around 10-15 knots over the open Bay waters today, building seas ahead of the frontal passage. Boaters should watch radar closely this afternoon — any thunderstorm cell moving over open water can produce sudden gusty winds and lightning with little warning. Conditions should improve behind the front tonight into Friday.
| Zone | Today’s High | Tonight’s Low |
|---|---|---|
| Western Mountains | 78° | 59° |
| Cumberland/Allegany | 87° | 63° |
| Hagerstown/Washington Co. | 88° | 66° |
| Frederick/Carroll | 88° | 67° |
| Baltimore/DC Corridor | 88° | 69-70° |
| Southern Maryland | 87° | 70° |
| Upper Eastern Shore | 86° | 70° |
| Lower Eastern Shore | 87° | 71° |
| Ocean City/Coast | 81° | 74° |
Looking Ahead
Friday: The cold front settles across or near Maryland, with lingering shower and storm chances (roughly 10-50% depending on location, highest toward the Bay and Eastern Shore/Ocean City), but the strong-to-severe threat drops off notably compared to today. Highs stay similar, mid-to-upper 80s inland, near 80° at the coast.
Weekend: High pressure builds in behind the front, bringing drier air and more sunshine both Saturday and Sunday, with seasonable highs in the mid-to-upper 80s. Humidity creeps back up late in the weekend as winds turn southerly again, setting the stage for a hot, increasingly humid stretch — and the close of Meteorological Summer — early to mid next week, with highs potentially reaching the low-to-mid 90s and heat indices approaching or exceeding 100-105°.
Data: NWS Baltimore/Washington, Mount Holly & Wakefield.
MD Weather Alerts — your director’s-cut forecast for every corner of Maryland. Stay dry out there, and keep an eye on the radar this afternoon.