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Tom Loffman's Sacramento Weather Forecasts and Information |
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Tom Loffman's Sacramento Weather Forecasts and Information |
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Thursday, May 15, 2008: Early heat Many locations around the greater Sacramento area hit 100 today, although Executive Airport was only 99, International Airport 98, National Weather Service (used to be called Downtown, but now taken at Water Treatment Plant at Sac State) 97, and 98 taken by me in Lincoln. For several locations it was a record for the date. However, it was NOT the earliest 100 degree heat ever. Downtown Sacramento hit 100 on the 5th of May, 1987. At that time, however, the temperatues were taken on the roof of the Post Office Building in Downtown and on hot days the high temperatures were warmer there than elsewhere in the region. In recent years, the National Weather Service has made a number of adjustments to this temperature measuring location and it appears as if the readings are now in line with other weather stations in the region. Hot temperatures should continue through the weekend, with more records expected. Temperatures today were 15-20 degrees above average for the date. Sunday, February 24, 2008: The End of "Weather Winter" ? "Weather Winter" is not "Calendar Winter". The coldest 90 days of the year, the period of time I call "Weather Winter", is coming to an end. Based on the average high temperature, it ended on February 18th. Based on average low temperatures it won't end until March 13th. Looking at record highs and lows, by February 11th temperatures can soar to over 75 degrees, and on February 18th, 1899 the high hit 80 degrees! The time of sub-freezing lows is not over yet, however. In 1898 the low hit 30 on March 23rd. So, the end of "Weather Winter" isn't abrupt - it can come in "fits and spurts". Sunday, December 2: Is it Winter Yet? This may seem like a ridiculous question, considering that it's only December 2nd, but the past couple of days it certainly has felt a lot like winter. Low temperatures have been near freezing in many locations, and the wind has added a bite to the air. The calendar says that winter is still several weeks away. So, when, exactly, is the coldest 90 day period of the year in Sacramento? Turns out, this cold period, that I call "Weather Winter", starts November 20th and continues until February 18th for highs and March 13th for lows. In other words, "Weather Winter" has already started. So, if it feels like winter to you, it's not just all in your head. Thursday, September 6: How long is "Weather Summer", really? Enough already! It's been a long, hot summer. It never went over 110 like it did last summer, but the days with highs over 95 just keep on coming. It's about this time in the summer that people start wishing for cooler conditions. And, we know that the calendar says summer starts "officially" in the third week of June, and ends in the third week of September. But what does the calendar know? What we want to know is not the length of what might be called "Calendar Summer" but what I call "Weather Summer" - the warmest 90 day period of the year. Fortunately, I calculated this for my book Tom Loffman's Sacramento Weather Guide, published about 17 years ago. What I found was that "Weather Summer" started in Sacramento on June 15th, and lasted through September 12th. The warmest 90 days averaged highs over 87 degrees during this period of time. Using the warmest 90 lows, the time span was June 16th through September 18th. Actually, this is fairly close to "Calendar Summer". We know that this isn't the case for other cities. In San Francisco the warmest days often occur after "Calendar Summer" is just a memory. In fact, Mark Twain said, "The coldest winter I ever spent was a summer in San Francisco." So, now that we're a week into September, the sun angle is getting progressively lower, and the days shorter, and the nights longer. It won't be long now before "Weather Summer" is over. Monday, August 6: The Dip of Dips Many years ago I talked about "The August Dip". Normally, our consistently hottest days come at the end of July and early August. The first week of August can be especially hot, with warm nights - "Hot August Nights". Then, starting in the second week of August we get a break from the heat that I named the "August Dip". I mentioned this year after year on the air and viewers regularly waited for the "Dip". The normal time of the "Dip" is August 10-14th, however, it can be early or late by up to 5 days. This year we seem to have had the record "Dip" and in some parts of Sacramento temperatures fell by 31 degrees from the 4th to the 6th. Today, the 6th, was a record low maximum temperature in Sacramento. I call this the "Dip of Dips". We find these regularly occurring patterns throughout the year and they are known as "singularities". Make sure to check the satellite photos and appropriate links provided here for the latest updates and information.
Tom Loffman, Meteorologist
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Coldest morning of the Arctic freeze
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Photo of my weather station on Saturday morning, January 13, 2007 at 8:15.
Temperature at 21.7 and dew point at 2!
Next photo is the fountain in the courtyard
in front of my house nicely iced up.
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