4:15 pm – Rushing storms, some showers
The stormline quickly solidified eastward, helping them to move to the early side. There are probably few complaints when it comes to timing. Various storm reports have been reported throughout the region, especially in the south and southeast of the city. (Note: The image below is likely to fill more and storms were still eastbound.)
Some of the on-site damage reports correspond to the location where tornado signatures were seen on radar and where tornado warnings were issued. The National Meteorological Service is likely to investigate this damage as soon as it can determine if tornadoes have been deployed.
Rain seems to be mostly of the order of half an inch, give or take a quarter of an inch. That was about what was expected.  Our 16:15 clock. Update completes our special storm reporting, unless something important is displayed. In the next hour, we have a PM update forecast. The short story is that a few showers are possible for the next hour or two, then maybe late into the night, as cooler and drier air streams in and lows settle in the 1940s.
15:40. – Tornado clock painted in town and in the west
With the approach of the storm line to the bay the tornado clock was completed for much of the immediate area. Once the last storms run out into the bay, the threat of severe weather throughout the region is over. Behind these storms, the rain will decrease to two in the next hour.
Good news for the evening plans is that all this is exciting on the early side. The national match should also take place without much concern of the weather.
15:25 – Strongest Storms Towards the East
The last severe thunderstorm warning is available for a large chunk of our eastern and southeastern suburbs until 4.30am. The danger is mainly the risk of wind damage.
Storms are now mainly east of Interstate 95, although some moderate to heavy rains dwell in the west. All of this is about an hour faster than expected, and it seems the backend is about to end. As such, it should rain before the pendulum heart, that the rain winds in the immediate area.
3:05 pm Strong to Heavy Storms Focusing on Interstate 95
In the last half hour front storms tended to dominate. This may mean that this is on the fast side compared to the original expectations. The final round of warnings was issued for Southern and Northeastern Suburbs until 15:45, mainly due to damage to wind potential.
Earlier Updates Below
] Original Post by 12:45 pm, Timeline Since Update
Just as we did last Friday, we observe the risk of violent showers and storms erupting this afternoon and into the early afternoon Evening move through the region.
Hit-or-miss is possible almost at any time before, but the main risk of violent or harmful storms is in the West in the early to mid-afternoon, and then shifts east and early in the evening. 19659019] The main risks of one or more storms are heavy rains, lightning strikes and the danger of winds being damaged in some locations above 60 km / h. One or two tornadoes can not be ruled out, though they would likely be short and weak.
Approximate time of arrival for storms:
- 2:00 pm West, 3:00 pm East.
- Showers, some heavy, possible from early afternoon to sunset.
All right: Early evening.
Sturn duration: 30 to 45 minutes, with several storms longer
Chance of measurable rainfall at each location: 80 percent
Storm movement: West-East Line as a Line, single Storms are moving northeast.
Possible Storm Effects: ] Heavy rain, gusty wind, lightning.
Possible storm effects: Isolated damaging wind gusts, a short tornado.
Precipitation potential: 0.25 to 0.75 inches, but variable. Some places could get up to an inch.
Severe Storm Discussion
As with the events of April 14 and 19, a powerful and dynamic jet stream refreshes the winds over our region and sets the stage for a storm event afternoon to evening.
As in these events, we lack a highly unstable atmosphere, thanks to layers of thick clouds that have hindered the warming of the water floor. But it should be just enough juice to trigger widespread storms. In particular, a question about wind damage potential is whether it will be isolated or slightly more widespread.
Although clouds dominated in the morning, a southern wind drove the thickest cloud cover, linked to a warm front, north of the immediate area at noon. At least periodic sunshine is likely into the afternoon.
A convective series of showers and thunderstorms going through our region between 2pm and 5pm. is now forming in the west in front of a cold front. The region has a short window to destabilize before that line arrives, which can somewhat curtail the storm organization.
Nevertheless, the increase in winds with altitude (called wind shear) makes us worried about the prospects for heavy storms, as the shear is very intense and can lead to some strong, well organized, long waves – living thunderstorm cells.
Areas of special interest may be along segments that try to "bend" as they move east. These bows can increase the wind damage potential as they occur.
Accordingly, the NOAA Storm Prediction Center (SPC) has presented parts of our region in an extended risk report, especially for the afternoon. An increased risk is level 3 out of 5 in terms of the widespread, severe threat. Areas west of Interstate 95 are generally at a slight risk lower by one category.
The high-resolution models show a potentially defective storm line, which already affects our region at 1 pm. well west and across the DC region mainly between 14 and 17 o'clock.
The very strong wind shear will create some rotational potential in these storms, possibly leading to one or two weak tornadoes. These spinners usually start at the wavy leading edge of the convective lines, but can also develop in any single cell that forms in front of the main line.
We find that the atmosphere in the South and East is the fastest destabilizing effect of Washington. For this reason, South Maryland, Delmarva and Central and Southeast Virginia are the greatest threat from damaging winds and tornadoes.
It is likely that the National Weather Service will spend a tornado or heavy storm guard for parts of our region this afternoon. A clock indicates that the conditions are favorable for bad weather. Warnings are issued later when storms occur.
We will continue with the further development of the situation.
02:43 am – Montgomery and Fairfax Tornado Alert Parts
A tornado alert is displayed for areas in red, including Potomac, Rockville, and Olney. This is until 15:15. Looking for shelter in this area. There is also another severe thunderstorm warning for northern parts of the area for strong winds.
14:25 – Strong to heavy storms that overtook much of the area
Storms in front of the main line were now warned of the danger of damaging wind gusts. A warning that runs until 15:15. includes much of the immediate environment.
And a large thunderstorm warning was issued for much of the western half of the region. It includes parts of the Montgomery, Loudoun and Fairfax districts until 15:00. The main threat from these storms is the wind up to 60 km / h.
13:55 – Strong Storms in Far Southwestern Parts of the Territory
Parts of the Fauquier and Prince William districts report a severe thunderstorm warning until 2:30 pm. Additional warnings for western parts of the area are available at short notice. The main risk of these storms is the wind damage.
1:40 pm – A Tornado Clock Developed As Storming West
A tornado clock has been issued for our area. It not only covers parts of Virginia, Maryland and the entire district, but also parts of Delaware, New Jersey and Pennsylvania. The clock runs until 21 o'clock. This evening.
A series of storms is now developing in the west and southwest. In the next hour, it will affect the southwest and west of the region. Additional storms try to shoot in front of the line, which is why they have to be watched.