Cool DayJuly 2nd, 2013 at 9:47 pm by Bill Steffen under Bill's Blog, Weather
This is a screen grab from the Muskegon GLERL camera showing a couple of people out at the end of the breakwater in the rain, and a screen grab from the Chicago GLERL camera, showing the top of the Sears…no now it’s the Willis Tower disappearing into the low stratocumulus clouds. High temperatures today: 73 Lansing, 71 Battle Creek and Grand Rapids, 70 Kalamazoo, 67 Holland and 66 in Muskegon. The afternoon high temperature at the GLERL thermometer on the S. Haven Lighthouse never got warmer than 56 and the Muskegon beach GLERL thermometer peaked during the afternoon at 58. The 71 in G.R. was the coolest high temperature in July since 7/19/2009. July 2009 was the coolest July ever in G.R. with an average temperature (average of the 31 high temperatures and 31 low temperatures) of 67.1. The four coolest Julys have all come relatively recently, in 2009, 1992, 1996 and 2006. The warmest July ever was 1921 with an average temperature of 79.8. The warmest two days in G.R. were July 12-13, 1936, with highs of 106 and 108. The coolest high temperature in Michigan today was 58 at the Marquette Coast Guard Station. Copper Harbor wasn’t far behind at 60. Other highs today: 62 Gay (in the U.P.), 62 Benton Harbor, 65 Fremont, South Haven and Munising, 67 Rogers City, 68 Three Rivers and 69 in Big Rapids and Cheboygan. The water temperature of Lake Michigan is cold, too: 54 Hollmaster State Park, 55 Grand Haven, 56 Muskegon and Pentwater (we get upwelling with an east wind – it pushes relatively warmer water toward mid-lake, bringing colder water from well below the surface to the shore. The beach air temperature in Chicago at mid-afternoon was only 60 and the beach temperature at Milwaukee at mid-afternoon was 61.
Here’s something interesting…it’s been hot and dry in Arizona, where humidities have been running as low as 5-10% in the afternoon. Some thunderstorms formed today over the North Central Mountains. Flagstaff got 1.74″ of rain, but get this…their temperature dropped from 86 to 50 as the storm came through. Same thing at Saint Johns, Arizona, where a thunderstorm knocked their temperature down from 95 to 63. Some other cool afternoon high temperatures today: 57 Grand Marais MN, 59 Bangor ME, 63 Farmington MO and Portland ME, 64 South Bend IN, 65 St. Louis MO, 67 Kankakee IL, 68 Chicago and Mattoon IL, 69 Milwaukee WI and Lafayette IN.