Sunday, February 12, 2012

Mid-Atlantic Ice Storm of 11-12 February 1994

This weekend marks the 18th anniversary of one of the worst ice storms in Mid-Atlantic history. The predominant weather pattern for the winter of 1993-94 proved to be fairly conducive for freezing rain and sleet storms. Two of note occurred on the Eastern Shore of Maryland, one in January and the other this weekend in 1994.

I particularly remember the Ice Storm of 11-12 February 1994 as it was the first, and still the only, time I witnessed 2" of ice accretion due to freezing rain and sleet. Here is an excerpt from the fantastic Maryland Winters web page, describing the winter of 1993-94 and in particular, the Ice Storm of 11-12 February 1994:

January-February, 1994  Cold and Ice: One storm seemed to come on top of another all dropping snow, sleet, and freezing rain across the state. The most devastating icestorm struck February 10-11. It left a coat of ice, one to three inches thick, from freezing rain and sleet! Meanwhile, across north-central Maryland 4 to 7 inches of sleet accumulated. By far, the hardest hit was an area was about a 50 mile wide band from near Fredericksburg, VA across southern Maryland (Charles, Calvert, St. Marys) up to Annapolis, across the Eastern Shore (Queen Annes, Caroline, and Talbot) and over Sussex and Kent Counties in Delaware. Some counties lost 10 to 20% of their trees from the heavy ice. Trees fell on homes and cars. Roads were blocked and impassable. Electric and phone lines were down with as much as 90 percent of the county's people without power. Outages and damage were so widespread that many people were without power for a week. A presidential disaster declaration was given and damages were estimated at near $100 million. There were numerous injuries from car accidents and people slipping.In Anne Arundel County alone, hospitals reported 104 weather related injuries in two days from the ice. This was likely the iciest winter Maryland has seen this century.





Wednesday, February 08, 2012

Great Hoarfrost of February 2012

Last week I experienced possibly the most spectacular hoarfrost event of my life. At approximately 6:30pm Thursday, 2/2/12, freezing fog developed here in Grand Forks. Fog continued until Friday afternoon when it briefly lifted for 2-3 hours. When I woke up Friday morning, the visibility was a dense 1/16 statute miles, or about 300-350 feet. A beautiful hoarfrost developed on vegetation, fences and signs. I took many pictures because I don't recall ever personally witnessing a hoarfrost of such magnitude.  Dense fog re-developed Friday evening, once again thickening to 1/8 statute miles or less. Finally on early Saturday morning, 2/4/12 the fog lifted. Sunshine had developed by mid-day and the hoarfrost melted away. Pretty substantial fog event, with approximately 33 hours of dense fog during a 36-hour stretch. Here is a sample of pictures from "The Great Hoarfrost of February 2012":











January 2012 Climate Summary

Day High Low Dep. Precip. Snow
1 30 13 +15 Trace 0.0"
2 15 0 +1 Trace Trace
3 41R 6 +17 0.00" 0.0"
4 38 13 +19 0.00" 0.0"
5 47R 14 +24 0.00" 0.0"
6 39 25 +25 0.01" Trace
7 38 23 +24 0.00" 0.0"
8 38 17 +22 0.00" 0.0"
9 46 27 +31 0.00" 0.0"
10 44 29 +31 0.01" Trace
11 35 5 +14 Trace 0.2"
12 6 -6 -6 Trace 0.5"
13 14 -10 -4 Trace 0.1"
14 32 14 +17 0.01" 0.3"
15 33 14 +18 0.00" 0.0"
16 14 -2 0 0.00" 0.0"
17 1 -10 -10 0.00" 0.0"
18 0 -16 -14 0.01" 0.5"
19 0 -17 -14 0.00" 0.0"
20 8 -12 -8 0.00" 0.0"
21 19 -11 -2 Trace Trace
22 27 19 +17 0.03" 0.5"
23 23 3 +6 Trace Trace
24 22 -4 +2 0.00" 0.0"
25 31 9 +13Trace Trace
26 38 14 +19 0.00" 0.0"
27 28 19 +17 0.16" 3.0"
28 23 6 +8 Trace Trace
29 18 -12 -4 0.01" 0.4"
30 32 18 +17 0.01" 0.0"
31 32 17 +17 0.01" 0.0"
Jan. 2012 26.2 6.6 +9.7 0.26" 5.6"


Average High: 26.2°F [Departure from Normal: +9.7°F] 
Average Low: 6.6°F [Departure from Normal: +9.7°F] 
Mean Temperature: 16.4°F [Departure From Normal: +9.7°F] 

Total Precipitation: 0.26" [Departure from Normal: -0.29"; 47% of normal] 
Total Snowfall: 5.6" [Departure from Normal: -5.6"; 50% of normal] 

Seasonal Snowfall: 13.7" [Departure from Normal: -17.1"; 44% of normal]