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Extreme Heat Will Hold on Through Mid-Week
Scattered storms to provide temporary relief to some

Matt Ross @ 1:05 PM

We will deal with another two days of extreme heat and high humidity before cooler air moves in for Thursday through the weekend.

Today and Tonight

Forecast Confidence: HighMostly sunny, very hot, scattered storms. Another uncomfortably hot day is on tap. High temperatures will reach 95-98 degrees with heat indices topping 100. If spending time outdoors, stay hydrated and wear light clothing. There is a 30% chance that a given location will see a scattered afternoon/evening shower or thunderstorm. Overnight will be partly to mostly cloudy, but dry. It will remain warm with temperatures only falling to the low to mid 70s.


Forecast Confidence: HighHot, Afternoon Showers/T-storms. Wednesday will be our last day of extreme heat as a late-day front ushers in relief. However most of the day will be hot. Afternoon highs should reach 93-96. There is a 40% chance of some showers and thunderstorms associated with the frontal passage late in the day through the overnight hours.

Thursday through the Weekend

Forecast Confidence: HighSeasonably Cool, Weekend Uncertainty. After some isolated morning showers, Thursday will be partly sunny and seasonably cool with pleasant temperatures in the low to mid 80s. Look for a slightly warmer repeat on Friday with sunny conditions and high temperatures in the mid to upper 80s. Right now the weekend looks partly cloudy and continued seasonably cool with highs in the mid to upper 80s and lows in the mid to upper 60s. There is a chance of showers (30%) on both Saturday and Sunday so stay tuned for updates on the upcoming weekend as we get closer.

Snow falls on Buenos Aires, Argentina, on Monday for the first time since 1918. Courtesy AFP.

Bill Proenza Ousted

National Hurricane Center Director, Bill Proenza, was placed on indefinite leave by parent organization, NOAA, on Monday evening. This ends a 6-month term by Proenza that was filled with government infighting and media battles (See Andrew's Sunday column for more on this topic). Ed Rappaport, deputy director of the National Hurricane Center since 2000, has been named as Proenza's acting replacement.

Climatology Notes

Yesterday's high of 98 degrees marked our 12th 90-degree day of the season. We average around 37 90-degree days for the April-October period, so there is still plenty of heat to come. Last year through this date we had 10 such days, and ended up with 36 for the year. Nevertheless, with a cool start to the month and some cooler conditions expected for the end of the week and weekend, this July isn't shaping up to be one for the record books. Here is a quick look back at July 1999, our 2nd warmest July on record, which featured a similar early-month heat wave.

In July 1999 the heat came right away and never let up for more than a few days. Some may remember the high of 99 degrees on July 4th. This was followed by high temperatures of 102, 103, 94, 93, and 99 over the next 5 days with the 1st 2 readings setting daily records. A slightly cool period of a few days lulled us into a sense of complacency before a second half of the month that was unrelentingly torrid. The period of July 16th-31st had an average high of 95 and an average low of 74. Every single day during this period averaged above normal. Only 2 days had highs below 90, and the mercury only dipped below 70 degrees one time. The month was capped off with a 101-degree reading on the 31st. This was followed by a predictably hot August.

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