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|Arctic Sea Ice Below Normal
The extent of arctic sea ice is much below normal for this time of year and recent trends indicate the sea ice is disappearing at a much faster rate than expected. The images below are from the NCEP MMAB Sea Ice Analysis Page which show the observed arctic sea ice coverage as of October 23. The image below that is the normal arctic sea ice coverage for October also available from the NCEP MMAB site . The climatology of ice cover spans 1901 to 1990 for the northern hemisphere.
These two images when compared and contrasted through the animated image below reveal much below normal arctic sea ice coverage over the Arctic for this time of year. In fact the current Arctic sea ice cover is less now than it normally is during the height of summer.
A comparison was done between the extent of arctic sea ice currently observed and the extent of ice cover for the same time last year. Current observations indicate the ice coverage is lagging behind from what was observed last year.
Finally a graph at the bottom shows the arctic sea ice loss trends between observations from 1979-2007 and IPCC model forecasts. The current trend during the past few years is sharply downward at an accelerated rate compared to computer model forecasts indicating the arctic sea ice loss rate is progressing at a more rapid pace. For more information on the loss of arctic sea and projected forecasts see this link to the University Corporation for Atmospheric Research.
|Observed Arctic Sea Ice Coverage as of Oct 23, 2007|
|Normal Arctic Sea Ice Coverage for the end of October|
|Comparison of Normal Arctic Sea Ice with Current Observation
Sea Ice Coverage Oct 23, 2007
Sea Ice Coverage Oct 23, 2006
|Comparison of Arctic Sea Ice on Oct 23, 2007 with Sea Ice Coverage Oct 23, 2006
|Arctic Sea Ice Loss Trend Comparison between Observation and IPCC Model Forecasts|
2007 Weather Events/Features:
- Strong Winds crossed the region on Dec 23rd, causing damage in spots.
- Ice and Snow Storm of December 13th
- First Clipper of the Season, December 5th
- Snow-Sleet-Freezing Rain-Rain of December 2nd and 3rd
- Snow Arrives in Central Pennsylvania (Nov 17-18)
- 2007 Holm Award
- New Snowfall/Winter reporting criteria for SkyWarn Spotters!
- October 2007 Warmest October Ever at Williamsport and Harrisburg
- Arctic Sea Ice Below Normal
- October 2007 will be the hottest October ever!
- October's (Record) Hot Weather
- Severe Storms and Tornado of 26 Sept 2007.
- Severe Thunderstorms - August 30, 2007
- Severe Thunderstorms - August 25, 2007
- Large Hail Producing Storms in Lycoming County - August 17th
- EF1 Tornado in Eastern Centre County (Aug 7th)
- Thunderstorms produced flooding, hail and wind damage on Sunday Evening (July 29th)
- Pulse severe storms on Saturday (July 28th)
- A Brief Reprieve From The Dry Summer Weather (July 20th)
- How dry has it been? (Mid July)
- Hot Weather Arrives in Central Pennsylvania (July 10th)
- Heavy Rain and Hail around Harrisburg on July 5th
- Office view of the State College fireworks display
- Pulse Storms in Record Heat of June 27th, 2007
- Widespread Severe Weather Event, June 19th, 2007
- Severe Thunderstorms in Northeast Flow - Day 2 - June 13th, 2007
- Severe Thunderstorms in Northeast Flow - Day 1 - June 12th, 2007
- Severe Squall Line Event June 8th, 2007
- Severe (Hail) Storms of 27 May 2007.
- NWS Open House Severe Weather Event, 12 May 2007.
- Severe (Hail) Storms of 10 May 2007.
- Late Season Nor'Easter (16 March).
- The Valentine's Day Storm (13-14 February).
- Late Start to the Snow - Winter 2006-07.
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