From the ABC 7 Weather team

Archive for May 2015

Eyes on the tropics already? (Tuesday Update)

May 5, 2015 - 10:45 AM
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We're still keeping a close eye on the disturbance along and east of Florida affecting the Bahamas. This system continues to have a chance for subtropical development over the next few days but as of now appears like it will have little to no affect on the D.C. area.

This area of showers and storms is associated with a surface and upper-level trough, meaning it doesn't have any tropical characteristics at the moment, but may become subtropical over the next few days.

The National Hurricane Center is monitoring the area for later in the week, and as of Tuesday has a 40% chance for development. For the latest Special Tropical Weather Outlook, the NHC has stated,

A large area of disorganized showers and thunderstorms extending
from the northwestern Caribbean Sea across Cuba, southern Florida,
and the Bahamas is associated with an upper-level trough and a weak
surface trough. An area of low pressure is expected to form in
association with this disturbance during the next day or two. The
low could gradually acquire subtropical characteristics over the
next few days while it moves generally northward at a slow forward
speed. For additional information on this system, see High Seas
Forecasts issued by the National Weather Service. The next Special
Tropical Weather Outlook will be issued on this system by 11 AM EDT
Wednesday.
* Formation chance through 48 hours...low...20 percent
* Formation chance through 5 days...medium...40 percent

Find more on the difference between a tropical, subtropical and extratropical storm here.

Atlantic 5-Day Graphical Tropical Weather Outlook (Courtesy: National Hurricane Center)

As of this morning, the majority of model guidance either keeps the system offshore along the southeast coast or drifts the low into South Carolina on Friday. All guidance as of now keeps the low well south of the D.C. area, but some tropical moisture still may filter its way into the Mid Atlantic byt early next week.

We'll continue to keep a close eye on it as these types of disturbances are notoriously difficult for a global model to accurately forecast. Be sure to stay tuned, especially if you are headed to the southeast beaches within the next week.

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Daylight is dominating

May 1, 2015 - 12:53 PM
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I felt like it was only a few weeks ago when we were waking up and the sunrise was after 7am and the sunset was prior to 7pm. It has now been a solid 8 weeks since we entered daylight saving time March 8th. Sunrise that day was 7:31am and sunset was 7:08pm.

Fast forward to May 1st and the sunrise is 6:10am and sets at 8pm. That means in just 8 weeks the D.C. area has gained 2 hours and 13 minutes more daylight. March 8th featured 11 hours and 37 minutes while May 1st has 13 hours and 50 minutes.

Duration of Daylight

Through May 31st, the area will gain an additional 51 minutes to hit 14 hours and 41 minutes by the end of the month. Through June there's only another 13 minutes to gain, however, as the longest day of the year happens around the summer solstice June 21st. The longest days of the year actually extend from June 18th through the 24th.

The difference between the summer solstice and winter solstice in terms of daylight is 5 hours and 28 minutes, as by December 21st and 22nd, D.C. will be back to 9 hours and 26 minutes of daylight.

Enjoy the sunshine and warmer temperatures this weekend!

Sunrise and Sunset times below.

Sunrise and sunset times looking ahead

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