SnowenOutThere Posted 3 hours ago Share Posted 3 hours ago The boundary which is moving northward into NOVA seems to be popping a bunch of storms off it now. The main cell south of manassas looks rough with 70mph winds in its core. May angle to get me with a direct hit. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted 2 hours ago Share Posted 2 hours ago Storms along the Frederick/Montgomery County line fading. Looks like an outflow boundary pushing south along I-270. Link to comment Share on other sites More sharing options...
yoda Posted 2 hours ago Share Posted 2 hours ago BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Baltimore MD/Washington DC 300 PM EDT Sat Jul 18 2026 The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... Northeastern Washington County in north central Maryland... Western Carroll County in north central Maryland... Western Howard County in central Maryland... Northern Montgomery County in central Maryland... Frederick County in north central Maryland... Northeastern Loudoun County in northern Virginia... * Until 400 PM EDT. * At 259 PM EDT, severe thunderstorms were located along a line extending from Mount Lena to near Poolesville, moving northeast at 30 mph. HAZARD...70 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. * Locations impacted include... Columbia, Germantown, Frederick, Gaithersburg, Leesburg, Hagerstown, Olney, Damascus, Thurmont, Poolesville, Emmitsburg, Harry Grove Stadium, Montgomery Village, Eldersburg, Ballenger Creek, Redland, Mount Airy, Robinwood, Taneytown, and Brunswick. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare immediately for large hail and damaging winds. People outside should move immediately to shelter inside a strong building. Stay away from windows. Large hail, damaging wind, and continuous cloud to ground lightning are occurring with these storms. Move indoors immediately. Lightning is one of nature`s leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. A Tornado Watch remains in effect until 900 PM EDT for central and north central Maryland. && LAT...LON 3918 7686 3910 7753 3961 7771 3972 7748 3972 7712 TIME...MOT...LOC 1859Z 246DEG 26KT 3957 7762 3914 7746 THUNDERSTORM DAMAGE THREAT...CONSIDERABLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...70 MPH $$ Link to comment Share on other sites More sharing options...
yoda Posted 2 hours ago Share Posted 2 hours ago Severe Weather Statement National Weather Service Baltimore MD/Washington DC 257 PM EDT Sat Jul 18 2026 MDC013-021-181915- /O.CON.KLWX.SV.W.0265.000000T0000Z-260718T1915Z/ Carroll MD-Frederick MD- 257 PM EDT Sat Jul 18 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT FOR NORTHWESTERN CARROLL AND NORTH CENTRAL FREDERICK COUNTIES IN NORTH CENTRAL MARYLAND... At 257 PM EDT, a severe thunderstorm was located over Taneytown, or 8 miles southeast of Emmitsburg, moving east at 25 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. Locations impacted include... Taneytown, Keysville, and Harney. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 900 PM EDT for north central Maryland. Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. For your protection move to an interior room on the lowest floor of a building. Link to comment Share on other sites More sharing options...
snowfan Posted 2 hours ago Share Posted 2 hours ago Yes! All the polygons. 2 Link to comment Share on other sites More sharing options...
Eskimo Joe Posted 2 hours ago Share Posted 2 hours ago Gust to 31 mph, M1.17" rainfall Frederick City mesonet site at the Community College. Link to comment Share on other sites More sharing options...
SnowenOutThere Posted 2 hours ago Share Posted 2 hours ago Interesting boundary collision is gonna happen right west/east along the Dulles toll road. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted 2 hours ago Share Posted 2 hours ago 1 minute ago, SnowenOutThere said: Interesting boundary collision is gonna happen right west/east along the Dulles toll road. Something's bound to pop on that. 1 Link to comment Share on other sites More sharing options...
SnowenOutThere Posted 2 hours ago Share Posted 2 hours ago Just now, Eskimo Joe said: Something's bound to pop on that. The southern boundary has just cleared my backyard and it’s legit. Good gusts and most impressively it’s not a one and done but sustained southerly winds for over 5 minutes now. Link to comment Share on other sites More sharing options...
87storms Posted 2 hours ago Share Posted 2 hours ago Two distinct storms today in Frederick (not including the one around 4am) and both were the real real. Prolific lightning in both storms with top shelf precip and healthy wind with the 2nd round. Getting some clearing now. 2 Link to comment Share on other sites More sharing options...
scope1 Posted 2 hours ago Share Posted 2 hours ago Severe thunderstorm warning in McLean. Radar looks primed. Gust front right on my doorstep. Looks fun 2 Link to comment Share on other sites More sharing options...
birdsofprey02 Posted 2 hours ago Share Posted 2 hours ago Looks like severe is approaching Ravens stadium where Morgan Wallen concert opening bands are getting started. Link to comment Share on other sites More sharing options...
AmericanWxFreak Posted 2 hours ago Share Posted 2 hours ago Prolific CG at 95 and 175/108 over last 15 mins . Link to comment Share on other sites More sharing options...
Eskimo Joe Posted 2 hours ago Share Posted 2 hours ago Thankfully the tornado risk isn't playing out. 1 Link to comment Share on other sites More sharing options...
high risk Posted 2 hours ago Share Posted 2 hours ago Winds were probably in the 40mph here. Impressive rain rates. Radar suggests that we're not done. Link to comment Share on other sites More sharing options...
NorthArlington101 Posted 2 hours ago Share Posted 2 hours ago Next Link to comment Share on other sites More sharing options...
batmanbrad Posted 2 hours ago Share Posted 2 hours ago the stuff S/SW of Leesburg between Middleburg and Arcola looking quite healthy Link to comment Share on other sites More sharing options...
high risk Posted 2 hours ago Share Posted 2 hours ago 1 minute ago, Eskimo Joe said: Thankfully the tornado risk isn't playing out. Yeah, the good low-level shear is closer to the warm front in NJ. Link to comment Share on other sites More sharing options...
wxmeddler Posted 1 hour ago Share Posted 1 hour ago The most impressive wind signature of the day so far is right over BWI... will be interesting to see what they report. TDWR says 55-60 mph. Link to comment Share on other sites More sharing options...
wxmeddler Posted 1 hour ago Share Posted 1 hour ago 10 minutes ago, wxmeddler said: The most impressive wind signature of the day so far is right over BWI... will be interesting to see what they report. TDWR says 55-60 mph. METAR KBWI 182005Z 33021G53KT 3/4SM R15R/1000V5000FT +TSRAGR BR SCT013 BKN044CB OVC100 23/22 A2986 RMK AO2 PK WND 30053/2002 WSHFT 1951 GRB05 PRESRR CONS LTGICCCCG ALQDS TS ALQDS MOV E GR 1/2 P0014 T02330222 $ 53 KTS and 1/2" Hail to boot! 1 Link to comment Share on other sites More sharing options...
ThePhotoGuy Posted 1 hour ago Share Posted 1 hour ago Strong storm moving through Northern Anne Arundel. Pretty fierce winds right right now. My spot usually doesn't get such strong winds. Link to comment Share on other sites More sharing options...
ThePhotoGuy Posted 1 hour ago Share Posted 1 hour ago FD on scene of a large tree into a home in Ferndale (near BWI). Link to comment Share on other sites More sharing options...
snowfan Posted 1 hour ago Share Posted 1 hour ago Green sky looking north towards BWI. Constant T&L. Link to comment Share on other sites More sharing options...
wxmeddler Posted 1 hour ago Share Posted 1 hour ago I haven't seen any reports of non-tree based damage. Most stuff I've seen has been tree damage that seems 60 mph or less. Link to comment Share on other sites More sharing options...
SnowenOutThere Posted 1 hour ago Share Posted 1 hour ago Looks like I can check off getting inside the notch of a supercell from the bucket list. 1 Link to comment Share on other sites More sharing options...
Chinook Posted 1 hour ago Share Posted 1 hour ago Punxatawney Phil needs to get to his basement or sturdy room. Oh, he's a groundhog? Already in his den, underground. Link to comment Share on other sites More sharing options...
vortex95 Posted 1 hour ago Share Posted 1 hour ago 19 hours ago, high risk said: That's not true. Other than some air quality models, the RAP and HRRR are the only standard forecasting models that explicitly account for smoke. Good to know. Thanks! 1 Link to comment Share on other sites More sharing options...
Rhino16 Posted 1 hour ago Share Posted 1 hour ago Richmond has some impressive numbers at the airport. Wonder what will go into the report. Link to comment Share on other sites More sharing options...
vortex95 Posted 1 hour ago Share Posted 1 hour ago 10 hours ago, yoda said: Which is a bit confusing... because if let's say on the 1300z SPC OTLK, 60 wind with no CIG is introduced... its still ENH risk. But if a CIG 1 is introduced with the 60 wind, it becomes a moderate risk per the conversion table If you confused, you are not alone. While I understand what SPC is trying to do here (quantify risk better), it not easy or always intuitive (probabilities and statistics are are tough subject for many, or kind of dry)! If mets and wx enthusiasts have problems figuring this out this, forget it as to the general public! It somewhat reminds me of interpreting the homograph, it not intuitive at first you have to spend time on what you are looking at and think in 3-D despite looking at a 2-D plot! Link to comment Share on other sites More sharing options...
vortex95 Posted 1 hour ago Share Posted 1 hour ago 7 hours ago, yoda said: 12z IAD sounding That's quite good for 12z, esp. the CAPE! Link to comment Share on other sites More sharing options...
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