textproduct: Wilmington

WHAT HAS CHANGED

No major changes.

KEY MESSAGES

1) Extreme heat through Thursday.

2) Hot and humid conditions will continue into the holiday weekend when the chance for showers and storms returns.

DISCUSSION

KEY MESSAGE 1)

Surface high pressure remains centered just south of the Ohio Valley and anomalous upper level ridging stays anchored in place through at least Thursday. Hot and humid conditions persist. Forecast highs in the lower to middle 90s, along with dew points in the middle 70s, result in peak heat index values around the 105 mark with higher readings possible. An Extreme Heat Warning is in place through Thursday to account for the high heat and humidity. Overnight lows in the 70s offer little relief from the heat.

KEY MESSAGE 2)

Ridging may start to break down on Friday allowing chances for convection and less confidence in the extreme heat. However, conditions will still be hot and humid through the holiday weekend. Outdoor activities could see some impacts from isolated to scattered thunderstorm activity especially during the afternoon and evening hours.

AVIATION /18Z TUESDAY THROUGH SUNDAY/

VFR cumulus is expected during the daytime hours today and Wednesday. Some river valley fog is possible overnight. Light southwesterly flow persists.

OUTLOOK...Thunderstorms are possible on Friday and Saturday.

ILN WATCHES/WARNINGS/ADVISORIES

OH...Extreme Heat Warning until 8 PM EDT Thursday for OHZ026-034-035- 042>046-051>056-060>065-070>074-077>082-088. KY...Extreme Heat Warning until 8 PM EDT Thursday for KYZ089>100. IN...Extreme Heat Warning until 8 PM EDT Thursday for INZ050-058-059-066- 073>075-080.