PM Update: Onshore flow, tidal flooding, more

Monday started out with sun and a pleasant autumnal breeze, but ended with clouds and an onshore flow. The dreary weather will continue through Tuesday as easterly winds increase ahead of a developing coastal system. The unsettled pattern looks to continue through the week. Here are your handy links to keep you updated in the world of weather:

  • Tidal Flooding is possible along the area shores, and the NWS has posted Coastal Flood Watches as a result. The onshore flow won’t help the situation. Winds gusting over 25 miles per hour are also expected.
  • Temperatures will fall into the 60’s tonight, but it will feel cooler as the onshore flow continues. We know we’ve said “onshore flow” a lot — but really, it will be noticeable.
  • A coastal storm will develop off the coast on Tuesday and may bring a period of rain to our area. The worst impacts are expected to skirt eastward, though, due to a developing system to our west.
  • Major flooding occurred in Phoenix — in fact, the wettest day on record there — with 3.29″ of new rain. Roads, interstates, property, etc were flooded in a significant event.
  • A major cold front is expected to pass the area, but not until this weekend. Unsettled weather is possible up until then.

Have a great Monday Night!

Active, more autumn-like pattern this week

After a hot and humid start to the weekend, a major cold front brought thunderstorms and a drop in temperatures. The pattern which has settled in to start this week is much more autumn-like, with temperatures in the 70’s and lower 80’s and much more comfortable dew points and humidity values. The pattern, however, will turn more volatile by the middle of this upcoming week with multiple storm systems and unsettled weather.

The trend toward more unsettled weather will begin late Monday into Tuesday, as an onshore flow develops and strengthens. Winds will pick up near the area shores, gusting over 25 miles per hour at times as an easterly fetch brings clouds and low level moisture inland from the beaches. This will bring an end to the sunshine which will dominate much of Monday. A mid level disturbance moving northward from the Mid-Atlantic states will aid in the development of showers, spreading into parts of New Jersey from southwest to northeast on Tuesday.

NAM model forecasting gusty winds along the shore Monday Night into Tuesday.

NAM model forecasting gusty winds along the shore Monday Night into Tuesday.

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Increased humidity, severe storms this weekend

Low clouds have created a bit of a wrinkle in the forecast early Friday morning, owing to a southeasterly flow which developed late Thursday night. The low level inversion allowed for these clouds to push inland and develop, as seen on visible satellite imagery from Eastern Pennsylvania into much of New Jersey and New York. These clouds will eventually thin and break later Friday afternoon, as southwesterly winds take over.

Temperatures, as a result, will rebound with highs expected to reach into the upper 80’s. Rising humidity will also make it feel much more uncomfortable. The atmosphere won’t be able to efficiently mix out — so temperatures won’t rise into the 90’s on Friday and seabreezes may develop. These seabreeze boundaries could serve as a focal point for the development of some isolated storms Friday afternoon.

HRRR model forecasting highs in the 90's away from the coast on Friday, with cooler air near the shore.

HRRR model forecasting highs in the 90’s away from the coast on Friday, with cooler air near the shore.

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Small asteroid, discovered days ago, will pass Earth Sunday

Talk about a close call. An asteroid, designated 2014RC, was discovered just 5 days ago by the Catalina Sky Survey in Tuscan, Arizona. The results were reported to the Minor Planet Center in Cambridge, Massachussets. The discovery came with only a slight bit of alarm, as the orbital elements quickly revealed that the small asteroid would pass safely away from the earth. At the time of its closest approach, the asteroid will be over New Zealand at around 2:18pm Eastern time on Sunday.

The reflected light from the asteroid suggests it is about 60 feet in size — so a small asteroid at that. Still, an impact from such an object could cause significant impacts on our planet. At its closet point, the asteroid will pass approximately 1/10 of the distance from the Earth’s center to the moon, or about 25,000 miles. That asteroid’s magnitude will only reach 11.5, making it virtually unobservable to the unaided eye.

Graphic depicting the path of asteroid 2014RC. (NASA).

Graphic depicting the path of asteroid 2014RC. (NASA).

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