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Until tonight: It will be mostly cloudy and humid with record warmth with lows in the mid to near 80 degrees F. The chance of showers and storms will be concentrated mainly in the evening and overnight. Light showers and storms may continue toward sunrise but may become more intermittent.
If some storms intensify and cause the most threat of damaging wind gusts, they will likely occur geographically north of town and before midnight. In humid areas, scattered fog may be possible near sunrise.
See the Washington Post Current Weather
Tomorrow (Sunday): The combination of heat and humidity could bring the heat index to around 105°F. Stay cool as much as possible and seek shade or air conditioning. Light rain and storms are possible in the morning, but multiple storms are more likely after 2pm. As a strong cold front approaches, severe storms with wind gusts in excess of 57 mph are also possible. Temperatures will high around 95°F.
The threat of severe weather in the evening will decrease over the course of the night, but areas south and east of town may need to remain vigilant until around midnight. A pre-dawn northwest breeze will slowly reduce humidity and temperatures will drop to the near to mid 60s.
Weekend severe storm chances: Higher chances on Sunday
A cold front arriving Sunday night will get us off to a good start to the work week. Before that, we may have some severe storms moving in tonight and Sunday. In chronological order, let’s first look at the overall severe storm chances on the “marginal” (1 in 5). tonight:
Content: Remnants of a broken squall line
Time: evening to late night
Threat likelihood: Wind gusts greater than 57 mph, one or two heavy rains causing flooding, one or two weak, brief tornadoes.
Geography: The north side of town will likely be a problem area. The storm’s squall line will move from the northwest to southeast and weaken over time.
Next, Sunday Overall slight (2 out of 5) chance of severe storms:
Description: One or two lines of storms caused by a cold front
Time: Mid-afternoon until at least late evening
Threats, in order of likelihood: Wind gusts of over 57 mph, one or two reports of heavy rain causing flooding, one or two weak, brief tornadoes, and one or two reports of large hail.
Geography: Most of the region, with some advantage along I-95 and east
