30 Day Rainfall Totals Reach 20″

Irene has moved out of the Mid-Atlantic states and into New England and she will likely be remembered most for producing flooding rains.

3 to 5 inches of rain fell along the Interstate 95 corridor between Baltimore, Washington and Fredericksburg. Further east, record amounts of rain have fallen:

Rainfall Totals from Hurricane Irene - http://water.weather.gov/precip/ (Click on Image to Enlarge)

Irene Dumps Upwards of 10" from NC to NJ (Click on Image to Enlarge)

30 Day Rainfall Totals Across the National Capital Region:

Washington Region 30 Day Rainfall Totals July 28 - August 28 (Click on Image to Enlarge)

Parts of the Mid-Atlantic from the eastern suburbs of Washington and Baltimore to Philadelphia and New York will likely break their all time rainfall records for August.  *** Nearly 20 inches of rain has fallen from roughly Church Hill, MD (east of Baltimore MD) across the Delaware Bay into southern New Jersey (Salem, Alloway, and Woodstown NJ).

Mid-Atlantic 30 Day Rainfall Totals: White Areas = 20" of Rain! (Click Image to Enlarge)

The Latest on Powerful Hurricane Irene

  • Hurricane Irene’s exact track will make the difference between Hurricane force winds (74 mph +) or Tropical Storm conditions (39 to 73 mph) in the immediate Washington Area.  Obviously at this time the greatest concern for Hurricane conditions is across the Chesapeake Bay and the Beaches.  The western suburbs will likely see only tropical storm force winds (if Irene behaves and stays along the east coast vs. a more inland track).
  • Now would be a good time to at least be prepared for ***** winds sustained between 39 and 50 mph with possible gusts up to 70 mph (especially from I-95 towards the beaches).
  • Right now (Thursday @ 8PM) it appears that Irene’s strongest winds and heaviest rains will visit the Washington Area late Saturday night through Sunday Noon.  Conditions should improve Sunday during the mid to late afternoon.


A more inland track: Sunday 6 AM -- Worst case scenario for the immediate DC Area with hurricane force wind gusts and 5 to 10 inches of rain

A track offshore would bring at least tropical force storm wind gusts with 2 to 5" of rain in the immediate DC Area and 6 to 9" further east


  • If Hurricane Irene takes a more inland track we will have conditions very similar to what we experienced during Hurricane Isabel.
  • Make sure you have a full gas tank on Saturday in case Irene takes the more inland track on Sunday morning.

Taste of Fall … then Hurricane Irene?

  • A strong cold front will cross the Washington Region Sunday bringing with it more afternoon thunderstorms. Some storms will become severe with damaging winds and hail
  • Beautiful weather is in store for the entire Mid-Atlantic Monday and Tuesday.

Highs on Tuesday will struggle to reach 80 degrees in Washington

  • Lows on Tuesday morning will fall into the mid 50s in the Shenandoah Valley, upper 50s in the outer northern and western suburbs and mid 60s in Washington and Baltimore.  Highs will struggle to reach 80 from Washington to New York with upper 70s in the western suburbs of the big cities.


  • Global Forecast Models take Irene very near the southern Florida coast and then pull her up the eastern seaboard late next weekend.
  • The remains of tropical systems would end any remaining drought conditions across Northern Virginia, southern Maryland and parts of lower Delaware and would also bring flooding problems to parts of the area that have received excessive amounts of rain during the past two weeks.
  • If Irene does track close to the spine of the Appalachians, a tornado outbreak would be possible with extreme wind shear in the atmosphere… stay tuned!