Forecast: Two More Days of Big Heat
Our streak of consecutive 90+ degree days grows to six as we endure another scorcher today. On the plus side, the streak may end at seven tomorrow with modest relief mid-to-late week. The other piece of good news is that between Tuesday and Thursday, we should pick up some rain. After a wet May and June, July rain is about 0.75" below average and the vegetation is starting to show it.
Hazy and hot. Mid 90s. A very weak front which passed through the region overnight (triggering a few storms) has switched the winds from southerly (from the south) to northwesterly (from the northwest). The (weak) northwest flow will result in a slight drop in humidity levels relative to the weekend, but temperatures will be just as hot under mostly sunny skies. We'll have some haze and the air quality index (shown to the right) is forecast to peak at Code Orange -- unhealthy for sensitive groups.
Overnight, skies will likely be partly cloudy with lows in the mid 70s downtown and near 70 in the cooler suburbs. An isolated thunderstorm can't be ruled out (20%) especially in western suburbs.
Keep reading for the forecast through the week.
Hot and humid. T'storm risk late. Mid 90s. The humidity, which dropped slightly on Monday, will return to oppressive levels. The afternoon heat index will near 100. By late in the afternoon and during the evening, a few thunderstorms are possible (35% chance) as a slow moving cold front approaches.
A few storms could linger through midnight or so, otherwise skies will be partly cloudy. It will remain humid with lows near 70 in the cooler suburbs to the mid 70s downtown.
Tuesday's cold front will stall over the region Wednesday, producing mostly cloudy skies and a decent chance (50%) of afternoon/evening showers and thunderstorms. The lack of sunshine may hold high temperatures below 90 for the first time in a week. Confidence: Medium-High
On Thursday, the front may get a push offshore from an area of high pressure to the northwest or it may linger over the region. If it's pushed offshore, we'll have partly to mostly sunny skies and noticeably lower humidity. If it stays put, we'll have mostly cloudy skies and a good chance of showers and storms. The most likely scenario may be a compromise where areas east of I-95 have a storm threat, whereas areas to the west start to dry out. For any of the scenarios, highs will probably be in the mid to upper 80s. Confidence: Low-Medium
On Friday, high pressure is likely to influence our weather, meaning mostly sunny skies and seasonably warm high temperatures in the upper 80s. Confidence: Medium-High
Saturday should be partly cloudy with a 30% chance of afternoon/evening storms due to a possible approaching front. Highs should be in upper 80s to low 90s. Confidence: Medium
If Saturday's front clears, Sunday should be a pretty nice day, with mostly sunny skies, comfortable humidity, and highs in the mid 80s. Confidence: Medium
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