Radar courtesy MyRadar | © OpenStreetMap contributors

9:55 p.m. — Tornado warnings discontinued as storm passes through northern Baltimore County

For more than three hours, a supercell or rotating thunderstorm, triggered tornado warnings as it passed from Berkeley County, W. Va. into northern Baltimore County, Md. All warnings have finally been lifted as the storm’s rotation has weakened.

As noted in the 7 p.m. update below, a likely tornado produced damage and one injury in Jefferson County, W. Va., near Charles Town.

Another possible tornado from the same thunderstorm caused tree damage and downed wires in eastern Frederick County near Libertytown while radar indicated debris lofted into the air briefly.

Thunderstorms will continue to pass through northern Maryland for the next hour or two, with heavy rain and we can’t totally rule out another severe thunderstorm or tornado warning. To the south, closer to the immediate D.C. area, just some passing showers with perhaps a clap of thunder or two may come through in the next couple hours.

We’ll have a fuller recap of this tornado storm on Tuesday.

8:35 p.m. — Tornado warnings continue into Carroll County

Following what was likely another brief tornado touchdown to the east of Frederick, a tornado warning has been extended into Carroll County. Rotation appears likely to pass near New Windsor. Fortunately the worst of the storm is passing through largely rural areas.

7:45 p.m. — Tornado warning for parts of Frederick County

A tornado warning has been issued for Frederick and locations to its east and northeast until 8:15 p.m. An area of rotation was located near Frederick at the time of the warning. Thus far, it does not seem to be as significant as what was seen earlier, although a tornado remains possible. Otherwise, these storms continue to cause heavy rain across parts of northern Maryland in particular.

7 p.m. — Tornado warning discontinued, but damage, injury reported in Jefferson County, W.Va.

The tornado warning which had been in effect for Jefferson County, W.Va., and areas just to the east in southeast Washington County has been discontinued as the storm has weakened. However, a severe thunderstorm is in effect through Hagerstown to around Frederick until 7:30 p.m. as the responsible storm shifts east.

The National Weather Service reports there was a structure collapse and one injury in Ranson, W.Va., which is just north of Charles Town. On Facebook, the Eastern Panhandle Working Fires account, which provides information on fire incidents and other natural hazards, posted that two buildings were damaged.

There were additional reports of downed trees and a collapsed structure to the west in Berkeley County.

Weather radar showed a clear hook and rotation, indicative of a tornado, as the storm passed from near the Berkeley-Jefferson County line to near Charles Town.

Here are some photos of the storm which show the rotation, a possible funnel cloud and the strong winds associated with the storm:

6:35 p.m. — Tornado warning for area around Charles Town, W.Va., until 7 p.m.

A rotating supercell thunderstorm is passing near Charles Town in West Virginia. If the storm remains intense, a tornado threat may approach a Brunswick-to-Burkittsville, Md., zone over the next half-hour.

Original story from late afternoon

While highs in the low and mid-70s were relatively mild, humidity was up today. Some muggy days become fairly normal this time of year but we’re not quite used to it yet. It seems like we’re getting some practice since humidity persists into the night and through tomorrow. Some rain may come along for the ride as well.

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Through Tonight: We’ve got a couple showers or storms around into evening. Any of this activity could be briefly strong, with heavy rain, lightning and the potential of isolated wind damage. A shower chance could last until the early overnight before ending after midnight. As skies trend clearer, some fog may form, especially in spots where it rained. Lows are in the low and mid-60s.

View the current weather at The Washington Post.

Tomorrow (Tuesday): There’s a good deal of sunshine in the morning, giving way to more clouds through the day. Highs range from the mid- to upper 80s. A shower or storm is possible as soon as afternoon, but there’s probably a better chance toward evening. Winds are from the south around 10 to 15 mph, with higher gusts.

See Jason Samenow’s forecast through the weekend. And if you haven’t already, join us on Facebook and follow us on Twitter and Instagram. For related traffic news, check out Gridlock.

Pollen update: Tree pollen is high at 440.26 grains per cubic meter of air. It has dropped off some in recent days and should generally continue to do so.

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