Falling temps tonight ahead of big snow on Tuesday

It was downright springlike today. But with Arctic air about to bleed into the region, the stage is set for our biggest areawide snow event in three years.

Weather WallFor Interactive, National, and Storm maps: 1. The maps allow you to turn on and off radar, current conditions, alerts, storm reports, and many more. They may take a few seconds to load. 2. These maps also enable you to zoom down to neighborhood and even street-level to get the latest weather conditions. Use the control with "+" and "-" symbols on the left to zoom in and out, or double click to zoom in on any location. 3. Click and hold down mouse button while dragging mouse to pan map in any direction. 4. To view all the map controls, mouse over the black bar across the top. 5. If you want to switch locations using a Zip code, city name or address, click on the "location" tab. 6. To stop or animate satellite or radar imagery, hit the "||" (stop) or "►" (play) control on the left side, above the transparency control.

D.C. Area Weather Meters The D.C. Area Weather Meters provide a snapshot into a range of health and lifestyle weather-related impacts.
• The Air Quality Index is provided daily by the U.S. EPA. There are six categories: good, moderate, unhealthy for sensitive groups (displayed as: Unhealthy SG), unhealthy, very unhealthy & hazardous.
• The UV Index is provided daily by the U.S. EPA and National Weather Service. It indicates the strength of UV radiation as forecast around 1 p.m. There are five categories: low, moderate, high, very high & extreme.
• The Golf Comfort Index is a real-time index of golf comfort from the Capital Weather Gang based on temperature, precipitation and wind. There are three categories: good, fair & bad.
• The Hair Quality Index is a real-time index of hair quality from the Capital Weather Gang based on humidity, wind, and precipitation. There are three categories: good, fair & bad.
• The Flu Pollen index indicates pollen levels: none, sporadic, local, regional & widespread.

Air Quality

Good

UV

Low

Golf Comfort

Bad

Hair Quality

Fair

Flu

Local

Moon Phase

Last Quarter Moon

Today in Weather History

Record cold, 1985: After bitter cold canceled Reagan's inaugural parade the previous day, the mercury dropped to four degrees below zero overnight in Washington, DC.