Rainfall was highest northwest of Interstate 95.

Rainfall was highest northwest of Interstate 95. (National Weather Service / May 30, 2012)

The line of strong thunderstorms that stretched from Virginia to Boston on Tuesday night drenched some parts of central Maryland, but added little to the region's official rain tally at BWI Marshall Airport.

The heaviest rainfall was to the northwest of Interstate 95. A look at a precipitation map from the National Weather Service's Advanced Hydrologic Prediction Service shows the major highway was a precise dividing line between areas receiving a half an inch or less of rain and those receiving upward of an inch of rain.

Here are some early rainfall totals reported by amateur weather watchers to CoCoRaHS, each representing the highest total seen in a given county:

  • 1.33 inches in Phoenix,
  • 1.35 inches in Columbia,
  • 1.2 inches in Churchton ( in southern Anne Arundel County),
  • 0.95 inches in Westminster,
  • 0.68 inches in Jarrettsville, and,
  • 0.52 inches in Hamilton.

The highest amount reported so far in the state was 1.79 inches near Montgomery Village.

What did you see? Let us know any rain gauge totals, lightning strikes or damage.

Have a weather question? E-mail me at sdance@baltsun.com or tweet to @MdWeather.