Mid-Month Cool DownMay 5th, 2013 at 4:16 pm by Bill Steffen under Bill's Blog, Weather
I’ve mentioned the possibility of a mid-month cool down and chance of frost for a couple weeks now…mostly based on the pattern this spring and the large amount of cold air/snow cover across much of Canada. The Great Lakes are on the chilly side, too. The mid-Lake Michigan buoy shows a water tempereature of 41.4F, an air temperature of 44.6F and a north wind at 13 mph. I just looked at the European model. It takes the 850mb temperature in G.R. to -2.7C on the 12th, with morning surface temperatures in the low-mid 30s. The GFS has a high/low of 48/33 on the 12th. Bottom line – beware of planting frost sensitive flowers and vegetables unless you can cover them up. Anything that can take a little frost can certainly go in now. At 4 PM Sunday PM, the beach temperatures at the S. Haven Lighthouse is 73.9 with an east wind. At the beach in Muskegon, a NW lake-breeze has developed, with the temperature falling from 72.4 to 56.6 between 2 and 3 PM. The temperature on the beach in downtown Chicago is 46.5 with an east wind at 19 mph – a pretty chilly day for early May. Showers have stopped the race at Talledaga, where the temperature is a chilly 51 (20 degrees colder in northern Alabama than it is here in W. Michigan! 24-hr. rainfall: 3.08 Greenville SC, 2.83″ Atlanta, 2.28″ Chattanooga, 2.93″ Jacksonville FL. Record low temperatures were set in at least 6 states this morning with a very cold 31 at Fayetteville AR. For the 11th – Riverbank Run – the GFS shows 50 degrees at racetime with a chance of a light shower (no lightning). The European would be dry and low-mid 50s (so, be optimistic at this point). For the afternoon Musikparade in Holland on the 11th…the models say mid 50s with a cool breeze off Lake Michigan. Both models would have a chance of a light shower…but only a chance. Here’s today’s MODIS Great Lakes image. The picture here is the Tulip Time Carnival from Gary at Reportit. Here’s the picture full screen.