Friday’s First Warning Forecast: Triple digit heat, late-day showers and storms

Posted at 6:40 AM, Aug 18, 2017
and last updated 2017-08-18 12:42:18-04

**Heat Advisory in effect for most of the viewing area until 8:00 pm**

The First Warning Storm Team is tracking triple digit heat and showers and storms to end your work week.

Temperatures will soar to the lower 90s today, but will feel like the triple digits. We have a heat advisory in effect until 8:00 pm this evening. We could see heat index values anywhere from 103° to 108°. We are tracking a cold front that will arrive late tonight and move out by Saturday afternoon. A few showers possible this afternoon and then better chances as the front arrives. A chance for showers Saturday as the front exits. Not going to be a washout by any means.

High pressure will build in on Sunday and Monday. It will still be humid on Sunday, but not as humid as the past few days. It will become more humid as the week progresses.

Good news, it’s still looking dry for the eclipse on Monday! We should see clear to partly cloudy skies with highs in the upper 80s. Showers and storms return Wednesday as a cold front moves in.

Tropical Storm Harvey approaches the Windward Islands. Will not be a threat to the U.S. We continue to keep an eye on an area of low pressure that continues to show signs of organization east of the Leeward Islands. It has a 70 percent chance of cyclone formation within the next two days. This system could become tropical storm Irma.

Today: Partly cloudy. Scattered showers and storms possible (40%). Highs in the low 90s. Winds: S 5-15 mph.

Tonight: Showers and storms (40%). Lows in the mid and upper 70s. Winds: S 5-15 mph.

Tomorrow: Chance for a scattered morning shower (30%). Partly cloudy. Highs in the upper 80s. Winds: W 5-10 mph.

Weather & Health 

Pollen: Low-Medium (Ragweed, Grasses)

UV Index: 9 (Very High)

Air Quality: Good (Code Green)

Mosquitoes: Extreme

Tropical Update

Harvey is moving toward the west near 21 mph and a continued westward motion with a slight increase in forward speed is expected over the next couple of days. On the forecast track, Harvey should move through the Windward Islands and into the eastern Caribbean Sea later today.

11:00 AM AST Fri Aug 18
Location: 13.1°N 61.3°W
Moving: W at 21 mph
Min pressure: 1005 mb
Max sustained: 40 mph

An area of low pressure located about 750 miles ENE of the Leeward Islands continues to show signs of organization. The low is expected to move west-northwestward at about 20 mph during the next few days. A tropical depression could form later today or tonight.

Formation chance through 48 hours: HIGH…70 percent.

Formation chance through 5 days…HIGH…70 percent.

We are also tracking a tropical wave in the far eastern Atlantic Ocean. Environmental conditions should become more favorable for some development next week.

Formation chance through 48 hours: LOW…10 percent.

Formation chance through 5 days: MEDIUM…40 percent.

Hurricane Tracker

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