As of today, Gwinnett County further relaxed its previous watering restrictions, which were modified on the first of April.  The county’s restrictions now match the state’s restrictions.

The big change is that you can now water newly installed landscaping (whether you install it or a professional installs it) for 10 weeks following installation 3 days per week, following the odd-even watering day rule.  Homeowners with an even address can water on Monday, Wednesday and Saturday, while odd numbered addresses can water on Tuesday, Thursday and Sunday.  No watering is permitted in Friday. You will also need to register with the Urban Agriculture Council and take a short online course on proper watering procedures.  The printable certificate you receive after passing the course must be posted outside your home.

The previous restrictions allowing filling of pools and hand-watering of any plants for 25 minutes on the odd-even schedule remain in place.

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If you are like me, you were probably looking forward to the predicted sunny skies this afternoon, which obviously didn’t happen. The moist air left over from Saturday’s rain remained in place as the slow moving cold front that brought the rain stalled across south Georgia. This kept the clouds in place and kept the temperatures cooler than expected.

If you were hoping for bright April skies this week, it looks like that won’t happen either, and there is a possibility of rain affecting the upcoming Masters Tournament in Augusta this weekend. For the first part of the week, we’ll see another wedge keep temperatures cooler than normal, with a good chance of fog and drizzle in northeast Georgia.

The wedge moves out on Wednesday, leaving us with a pleasant day for the first round of the Masters on Thursday, but setting us up for a chance of showers and thunderstorms through the weekend. Right now, it looks like the greatest chance of rain is in the western part of the state, but golfers could see rain on Friday and Saturday. The storm system moves out Saturday night, leaving better weather for Sunday.

The week of the 13th promises to be interesting, at least by the early forecasts. There’s a good possibility that cold Canadian air will make one last stand, with a chance of a very late freeze for the first part of the week. Both the 6-10 and 8-14 day outlooks are calling for colder than normal temperatures, and Accuweather is calling for lows in the mid 30s a week from Monday and Tuesday. If you were planning to get your annuals out this week, it might be a good idea to hold off until the forecast becomes clearer as the week wears on.

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With the weather in Georgia staying dry, and seemingly no end to the weather pattern that we’re in, there hasn’t been a lot of weather news to talk about. In fact, for most of the country, it’s been dry. But that’s not the case elsewhere.

In Mexico, 1 million people have been displaced, and there has been over $700 million dollars in damage due to flooding in the state of Tabasco. Some are calling the situation as bad as Hurricane Katrina in New Orleans. Meanwhile, in England, massive storms in the North Sea are expected to cause severe flooding and a tidal wave on the east coast of Britain. Officials there have closed a barrier at the mouth of the Thames river to prevent inland flooding.

Closer to home, most of North Georgia got its first freeze of the season last night. Temperatures here in Lawrenceville dropped to 28.5 on my thermometer early this morning. In Summerville it got down to 21 degrees, which appears to be the low for the state so far, followed closely by Peachtree City, which reported 22 degrees. Due to the city heat island, it only reached 32 degrees at Atlanta Hartsfield.

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We’re almost two months into the official hurricane season, which runs from June 1st to November 30th, and so far, we’ve had only two named storms. Given the various predictions for between 13 and 17 named storms, it may seem to some that we’re not going to make it.

Keep in mind that the strongest part of the hurricane season is from mid-August to mid-October, when the Atlantic Ocean is at its warmest. With the exception of 2005 and 2003, when we had seven storms by the end of July, for the past ten years, we’ve seen two tropical storms each year before August 1st, except for 1998 and 2004, when there weren’t any storms at all in the first two months of the season, so we’re on schedule.

The approach of the strongest part of the hurricane season brings a reminder from the Georgia State Climatologist David Stooksbury that Georgia could be severely impacted should a Katrina-like storm hit the coast. In an article posted yesterday on the Georgia FACES website, Stooksbury reports that UGA students created a model of the storm surge from Hurricane Katrina, and then projected it along the Georgia coast, where it would cause a 20-30 foot storm surge.

“A storm surge of this magnitude would wash over the barrier islands and lead to massive flooding along the coast. Almost all of Georgia east of I-95 will be under water with a category 3 hurricane. Areas west of I-95 will see major flooding, too.”

The article also explodes some Georgia hurricane myths, and offers advice on preparedness.

Next week brings updates to the hurricane forecasts by the National Weather Service and Dr. Gray’s team over at Colorado State University, and it will be interesting to see what changes, if any, we see in the predictions.

Dr. Gray has written an op-ed article for this morning’s Wall Street Journal examining if the increases we’ve seen in the intensity of hurricanes recently is being caused by global warming. He compares two long term periods from the early 20th century and late 20th/early 21st, and concludes that the number of landfalling hurricanes in the US declined, despite the increase in carbon dioxide in the air.

Instead of following the politically correct line on global warming, Dr. Gray analyzes the patterns of ocean currents and salinity in the Atlantic over time, and concludes,

“The warming theorists — most of whom, no doubt, earnestly believe that human activity has triggered nature’s wrath — have the ears of the news media. But there is another plausible explanation, supported by decades of physical observation. The spate of recent destructive hurricanes may have little or nothing to do with greenhouse gases and climate change, and everything to do with the Atlantic Ocean’s currents.”

If you’re not a Wall Street Journal Online subscriber, you can read the article via Google News. Click this link, and choose the article “Hurricanes and Hot Air”.

I ran across an interesting map on the National Climate Data Center website that makes me question how much global warming has affected us here in Georgia. The map, shown below, plots the annual mean temperature trend in the state from 1985 through 2006:

It’s fairly obvious that the mean temperature has actually been decreasing over the past 112 years, by .06 degrees per decade. You can see that the stage has alternated between periods of relatively warm and relatively cool weather, with a colder than normal spell from the mid 50s through the early 80s, and a warmer than normal period from the early 80s on.

Of course, for many people alive today, that trend would cause us to think that it’s gotten warmer since childhood, hence the belief that we must be having global warming. Few people remember the warm temperatures recorded during the period from 1910 through 1935, when it was warmer than it is today. The warmest year recorded was back in 1923.

You can go to this page to create your own chart, or a table of mean temperatures.