From the ABC 7 Weather team

Washington, D.C. Weather Forecast: First Heat Wave of the Season This Week

June 15, 2014 - 09:10 PM
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Mother Nature is turning up the heat and humidity this week.

Tonight:
Mainly clear
Lows: Upper 50s to mid 60s downtown
Wind: S 5 mph
Monday:
Partly cloudy, hot and humid
Highs: Around 90 degrees
Wind: SSW 5-10 mph
Tuesday:
Partly cloudy, hotter and still humid, 30% chance of t'storms
Highs: Lower 90s
Wind: W 5-10 mph

After a delightful weekend, a big change in our weather pattern for the upcoming work week.  As high pressure slides offshore, a southerly wind will pump in heat and humidity from our south.  With 90°+ high temperatures forecast through Thursday, this will likely be the first heat wave of the year.  A heat wave occurs when daytime highs reach 90° (or higher) for three consecutive days. 

Along with the high temperatures and high humidity, comes chances for afternoon showers and thunderstorms.  This will be the pattern pretty much everyday this week.  Temperatures will drop back into the upper 80s by the end of the week and next weekend, but scattered thunderstorms will still be possible.  Also, next Saturday marks the summer solstice at 6:51am ET.  We'll have our longest amount of daylight that day.  Sunrise is at 5:43am and sunset at 8:37pm for a total of 14 hours and 54 minutes. 

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