Jeff Miller
EF5
Interesting changes coming from Detroit.
Opinions?
Snowfall Warning and Advisory Criteria. Starting this winter season and continuing through at least the ’08-’09 season, NWS Detroit/Pontiac will be running a test, the Snow Intensity Winter Warning Improvement Program (SIWWIP). The idea is to better incorporate snowfall intensity into our warning decisions. However, duration and total snowfall accumulations still need to be accounted. The entire SIWWIP plan is to capture those one or two events every year that drop 4 to 5 inches in about 6 hour time frame. These events are usually more life threatening than a six inch snowfall in 12 hours because the snow falls at a faster rate, and still accumulates to a significant depth. So, during the next two winter seasons the NWS Detroit/Pontiac snow criteria will be...
WARNING 8 inches or more in 24 hours ADVISORY >4 inches but <8 inches in 24 hours
WARNING 7 inches or more in 18 hours ADVISORY >4 inches but <6 inches in 12 hours
WARNING 6 inches or more in 12 hours ADVISORY >2 inches but <4 inches in 6 hours
WARNING 5 inches or more in 9 hours
WARNING 4 inches or more in 6 hours
Opinions?