Slight Risk of Severe ThunderstormsMay 20th, 2014 at 2:48 am by Bill Steffen under Bill's Blog, News, Weather
Midday Update from SPC: “IF AN ORGANIZED SQUALL LINE MATURES BENEATH THE STRONG SPEED MAX A MORE WIDESPREAD WIND EVENT COULD UNFOLD ACROSS THIS REGION. SEVERE PROBS MAY NEED TO BE INCREASED IF INSTABILITY REFLECTS LATEST NAM GUIDANCE. Bill says: “especially watch the I-80 corridor north to I-94 corridor from E. Iowa to NW Ohio. Timing for storms in W. Michigan would be after sunset. Canadian model has highest rainfall along I-94. Most of the afternoon should be dry.
uch of Southern Lower Michigan is now in the Slight Risk Area for Severe Thunderstorms for later this afternoon and tonight. The area is south of a line from Holland to just west of Ann Arbor to Monroe to Cedar Point. SPC says: “THUNDERSTORMS APPEAR MOST LIKELY TO INITIATE BY LATE AFTERNOON NEAR A SFC TROUGH IN ERN IA AND NWRN IL. THIS ACTIVITY MAY ORGANIZE INTO A LINEAR MCS…MOVING ESEWD ACROSS THE OH VALLEY FROM LATE THIS AFTERNOON INTO THE EVENING…THIS LINE OF STORMS IS EXPECTED TO MOVE ESEWD ACROSS NRN IL…NRN IND REACHING CNTRL OH BY EARLY TO MID EVENING. AN ENHANCED WIND DAMAGE THREAT MAY DEVELOP ALONG THIS CORRIDOR. Our in-house microcast has the main batch of t-storms coming in after sunset, with the heavier activity south of I-96.
Links: Grand Rapids radar, Northern Indiana radar, Chicago radar, Detroit radar and Milwaukee radar. Here’s regional radar, the College of DuPage Radar Map (pick any radar in the U.S.), College of DuPage Grand Rapids radar, GFS snowfall for the next 120 hours and NAM model snowfall for the next 84 hours. the West Michigan Lightning Tracker, National Lightning Tracker, the local warning/advisory map and the National warning/watch/advisory map, and a surface weather map. You can checkout the latest Grand Rapids NWS discussion, the Northern Indiana NWS discussion (includes the Michigan Counties that border Indiana), the discussion for Northern Lower Michigan, and Eastern Lower Michigan. Check out Storm Total Precipitation (until they reset it). Here’s the Spyglass Condos Weather Station the S. Haven GLERL station, the Muskegon GLERL station, the Grand Haven Steelheaders webcam and weather station, and the weather station at Holland State Park. Check out the Maranatha Webcam at Lake Michigan and links to webcams. Here’s the infrared satellite loop (night) and the visible satellite loop (daytime), Lake Michigan water temperatures (summer). Here’s storm reports from SW Michigan, Northern Michigan, NE Illinois, SE. Wisconsin, Upper Michigan and E. Michigan. Check out the wind and wave height at the South Mid-Lake Michigan Buoy (Apr. to Nov. only), the North Mid-Lake Michigan Buoy (Apr. to Nov. only), the buoy at Big Sable Point near Ludington, the weather station at Manistee Harbor and the weather station on the beach at St. Joseph. Here’s Michigan wind gusts from MesoWest, data from the MAWN agricultural weather stations and Weather Underground (data at the bottom from private weather stations). Check out the webcam at Krupp’s Resort, where the snow has finally melted and the lake ice is gone. Here’s the U.S. Low Temperature map. Here’s a live look at the Houghton Bridge. Here’s the Consumers Energy Power Outage Map. Here’s Closings.