Shock drop: Temperature may fall from 70 to 35 Wednesday evening

A serious cold front is coming – so strong that temperatures in Washington Wednesday evening may go from balmy to bitter in the course of hours.

Check out this animation from the high resolution NAM model: it’s a simulation of temperatures in 3 hour intervals Wednesday: at 4 p.m., 7 p.m., and 10 p.m.


Animation of temperature change between 4 and 10 p.m. Wednesday from high-res NAM model (WeatherBell.com)

Yes, it forecasts the temperatures plummeting from roughly 70 to 25 degrees in 6 hours.  Now this is raw, unadjusted model data, so the degree of change is probably overdone. But it’s completely possible that the 5 p.m. temperature is near 70 and at midnight falling through the 30s.  By Thursday morning, the mercury likely bottoms out in the 20s – a 40 degree swing in 12 hours.

 

Given the strength of the cold front, it’s no surprise we’re expecting the possibility of strong to even severe thunderstorms and high winds.

This afternoon, the National Weather Service’s Storm Prediction Center placed the metro region under its slight risk designation for severe thunderstorms and even mentioned the possibility of tornadoes.


Mid-Atlantic region, including Washington, D.C., under a slight risk of severe thunderstorms Wednesday. (National Weather Service)

Tomorrow is most definitely a day to remain weather aware as hazardous conditions could develop.

Jason is currently the Washington Post’s weather editor. A native Washingtonian, Jason has been a weather enthusiast since age 10.
Comments
Show Comments
Most Read Local

Heat Tracker

45
90-degree days year-to-date
Yearly Average
36
Record Most
67 (1980,2010)
Record Fewest
7 (1886,1905)
Last Year
24

At a Glance

Sun.

partlycloudyday
71° /91°

Mon.

partlycloudyday
74° /89°

Tue.

partlycloudyday
74° /94°

Wed.

thunderstorms
75° /93°
Drop 20%

Thu.

thunderstorms
75° /93°
Drop 30%

Fri.

thunderstorms
74° /91°
Drop 30%
National Airport
Dulles
BWI

Right Now

D.C. Area Almanac

 
National
Dulles
BWI
Avg. High
 
Avg. Low
 
Rec. High
 
Rec. Low
 
Sunrise
 
Sunset
°F
 
 
°C
Next Story
Jason Samenow · March 11, 2014

To keep reading, please enter your email address.

You’ll also receive from The Washington Post:
  • A free 6-week digital subscription
  • Our daily newsletter in your inbox

Please enter a valid email address

I have read and agree to the Terms of Service and Privacy Policy.

Please indicate agreement.

Thank you.

Check your inbox. We’ve sent an email explaining how to set up an account and activate your free digital subscription.