Update on Timing & Location of Today’s DC Area Severe Weather Threats: Small Hail, Damaging Wind Gusts & Isolated Tornados

022517_dcstorms-com_svr-tsrm_risk

A squall line with embedded strong to potentially severe thunderstorms will impact the Washington Area between 2 and 4 PM this afternoon. Here is the latest HRRR (High Resolution Rapid Refresh) model showing the line moving through the immediate Washington Area:

hrrr_radar_futurecast

The Storm Prediction Center has placed parts of the Washington Area under Slight Risk for Severe Thunderstorms.  

day1otlk_1300

Ingredients for scattered severe thunderstorms:

  • A strong low-level jet stream
  • Moderate helicity (wind shear)
  • Medium CAPE (convective available potential energy)

Main threat:

  • (7/10) Damaging wind gusts in excess of 58 mph
  • (4/10) Small hail
  • (1/10) An isolated tornado can’t be ruled out especially as the storms approach the Potomac River basin and Chesapeake Bay (local bay/river breezes may increase shear in these areas).

2 thoughts on “Update on Timing & Location of Today’s DC Area Severe Weather Threats: Small Hail, Damaging Wind Gusts & Isolated Tornados

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