Expansive Winter Storm Will Have Significant Impacts

A massive winter storm is stretching from the Rocky Mountains to Maine, affecting all of the Ohio valley with heavy rain, heavy snow, sleet, freezing rain, and damaging ice.

For Cincinnati, the situation is complicated since a mixed bag of precipitation is expected. Initially, there will be a lull in precipitation for a time overnight before the next round kicks into gear.

Don’t let forecasts of 1-3 or 2-4 inches fool you. Much of that will be sleet. Sleet is essentially snow at 10:1, in other words, 1 inch of sleet has the mass of 10 inches of snow. It is very likely that, even with lower total accumulations, the large amount of sleet will necessitate plowing of roads and other paved surfaces.

Sleet is extremely heavy and hard to move so clean up will be slow. It may take quite a while for roads to be cleared since bitter cold arctic air will follow the winter storm. Temperatures Saturday morning will likely be near or below zero Saturday morning in much of the Ohio valley.

.

2017 Rainfall Totals:

Month Monthly Total Annual Total 30 Yr Avg/YTD 2017 Departure
January 3.82 3.82 3.08/3.08 +0.74
February 2.95 6.77 2.08/5.88 +0.89
March 8.43 15.20 3.82/9.70 +5.50
April 7.38 22.58 4.03/13.73 +8.85
May 8.69 31.27 5.28/19.01 +12.26
June  6.85  38.12 4.24/23.25  +14.87
July  4.45  42.57 4.05/27.30  +15.27
August  3.18  45.75 3.26/30.56  +15.19
September  2.57  48.32 2.83/33.39  +14.93
October  5.13  53.45 3.38/36.77  +16.68
November  5.24  58.69 3.47/40.24  +18.45
December  2.60  61.29 3.48/43.72  +17.57
2017 overall was exceptionally wet at Cheviot OH 3.4 W with an annual departure of +17.57 inches. 2017 rainfall topped 60 inches and reached 61.29 inches at year’s end. The wettest months were March, April, and May when 8.43, 7.38, and 8.69 inches of rain fell respectively. The driest months were February, September, and December when 2.95, 2.57, and 2.60 inches of rain fell respectively. Severe flash flooding occurred pre-dawn on March 1, May 24, June 23, and early on November 6. There were 10 days of 90 or above with the
earliest date on June 12 and the latest date on September 27.