Cf. Science_Made_Stupid, "Looks like rain mebbe, or mebbe not."
Here in Wheaton we just had a heavy downpour with moderate cloud-to-cloud lightning and thunder. Lasted 20-30 min., preceded about an hour ago by a lighter downpour. No wind. Straight down, tropic style.
I spent the time outside managing my hydraulic engineering at the southwest corner of my house. I can see why they have trouble with dams.
URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 331 NWS STORM PREDICTION CENTER NORMAN OK 1150 AM EST SUN MAY 30 2004 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF
EASTERN AND SOUTHERN ILLINOIS MUCH OF INDIANA WESTERN AND CENTRAL KENTUCKY
EFFECTIVE THIS SUNDAY MORNING AND EVENING FROM 1150 AM UNTIL 700 PM EST.
...THIS IS A PARTICULARLY DANGEROUS SITUATION...
DESTRUCTIVE TORNADOES...LARGE HAIL TO 2 INCHES IN DIAMETER... THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHWEST OF FORT WAYNE INDIANA TO 10 MILES WEST OF FORT CAMPBELL KENTUCKY.
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. OTHER WATCH INFORMATION...CONTINUE...WW 329...WW 330... DISCUSSION...NRN IL MCS EXPECTED TO CONTINUE EWD INTO IND LATER THIS AFTERNOON...WITH EMBEDDED SUPERCELLS MAINTAINING A THREAT FOR ISOLATED TORNADOES/DAMAGING SURFACE WINDS. FARTHER S AND E... SUPERCELLS ALSO EXPECTED TO DEVELOP IN THE NEXT FEW HOURS ALONG DIFFUSE NW/SE WARM FRONT ACROSS CNTRL PARTS OF IND/KY. ISOLATED ACTIVITY NOW DEVELOPING IN WARM SECTOR OVER SERN IL/WRN KY MAY ALSO PERSIST AS SURFACE HEATING COUNTERACTS WARM ADVECTION LIKELY OCCURRING IN THE 800-700 MB LAYER. VERY RICH MOISTURE INFLOW AND STRENGTHENING DEEP WIND FIELDS MAY SUPPORT A FEW TORNADOES IN ADDITION TO LARGE HAIL/HIGH WIND.