GOES-13 Results
last updated 22 May 2013
Spring Snow Storm (0.5 MB JPG) at 2340 UTC on 10 April 2013.
Sunset in the Mississippi Valley illuminates a powerful front with a 50 F temperature drop, extending from the Gulf to the Great Lakes that dumped a foot of snow across Colorado, Kansas, and Nebraska.
Sunglint for Spring (1.3 MB JPG) at 2045 UTC on 22 March 2013.
On the first day of spring, the sun is strongly reflected from the calm waters of the equatorial Pacific, while another Nor-Easter snows on New England.
Blizzard Alley (0.2 MB JPG) at 1745 UTC on 7 March 2013.
The Iowa-Wisconsin area is commonly a path for Midwest snowstorms.
The aftermath viewed from space reveals the riverine topography of the region.
After the Blizzard (0.3 MB JPG) at 1645 UTC on 9 February 2013.
A full-resolution GOES image of clouds and snow across the Great Lakes and New England illustrates the sweep of a February blizzard in the northeastern USA.
Lake-Effect Snow (0.3 MB JPG) at 1745 UTC on 22 January 2013.
The powerful arctic air outbreak over the northern USA drove snow off the unfrozen Great Lakes for several days.
Appalachian Snow (1.8 MB JPG) at 1545 UTC on 18 January 2013.
A relatively snow-free winter presents just a smudge of snow in the mid-Appalachian Mountains, even after a massive cold air outbreak east of the Rockies.
Snow on First Day of Winter (0.1 MB JPG) at 1745 UTC on 21 December 2012.
The upper Midwest had no snow accumulation at the end of 2012 until a blizzard laid down more than a foot of snow before moving up the Ohio Valley.
The still-warm stream beds feeding the Mississippi and Missouri rivers show through the snow cover.
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| The surface winds on 30 October 2012 illustrated by http://hint.fm/wind/ show how the superstorm dominated the weather after landfall. |
Great Lakes Snow (0.5 MB JPG) 1730 UTC on 5 March 2012.
Snowfall "on the March" all around the Great Lakes at the end of winter.
First snowfall of 2011-12 (0.7 MB JPG) at 1746 UTC on 6 December 2011.
The previous day's blizzard laid down a massive snow-streak from New Mexico to Lake Superior in the first week of December.

Snowtober (0.4 MB JPG) 30 October 2011 at 1645 UTC.
On the day after a record-breaking blizzard passed over the northern Appalachians, the dawn revels massive snow cover that downed leafy trees all over the Northeast USA, leaving 1.5 million people without electrical power for days. The guilty storm lurks east of Cape Cod.
LONG DISCUSSION
This blizzard was the reincarnation of the week-long storm that hit California last week, yet another powerful loop in a world-wide series of disturbances. The recent storms across Europe and Russia are more unusually strong loops in the jet stream. Climatologically, these are due to a variation in the location of the quasi-static high- and low-pressure systems around the northern hemisphere. For instance, there is a high pressure system over the mid-Atlantic (normally, the Bermuda high) accompanied by a low pressure system over Iceland. This year, this "North Atlantic Oscillation" pair weakened and moved eastward. Last summer, that allowed the hurricanes to move northward across the mid-Atlantic instead of the west-Atlantic, sparing the US East Coast. This winter, that pattern allows polar outbreaks to move freely across the eastern USA, freezing the East Coast in December. On the other side of the Atlantic, Europe gets unusual amounts of polar air and snow. For more discussion of the NAO, visit NOAA's Climate Prediction Center).
East Coast blizzards occur in concert with the world-wide ENSO variations, roughly every decade. I can personally recall similar blizzards paralyzing the Washington DC area in 1978, 1983, 1993-4, and 2009-10. Great blizzards paralyzing New York City and Boston are legendary. The expert on the subject works at NOAA: Paul Kocin (paul.j.kocin@noaa.gov, 301-763-8201). He has written government monographs on the subject. He sees a pattern where a loop in the jet stream around a polar high over the Appalachians is redirected back to the northwest by an air mass over Newfoundland, carrying moisture mixed with cold wind back over the upper East Coast, instead of out-to-sea.
I found a book on my shelf titled "Great Blizzards of New York City" by Kevin Ambrose (1994), with photos of great blizzards in 1888, 1899, 1920, 1935, 1947, 1961, 1969, 1978, 1983, 1993 and 1994.
Our animation consists of clouds scanned 3 to 4 times per hour by NOAA's GOES weather satellite overlaid on a true-color map from NASA's TERRA climate satellite. During the day, the cold (colored white) cloud tops observed by the GOES infrared channels are texture-enhanced using the reflected sunlight in visible channel on GOES. Making it look natural involves several thousand lines of computer coding.
Once the overlay was working, we automated it and assemble movies from the recent frames. We offer the color overlays and movies for the previous week on the web (goes.gsfc.nasa.gov). It's an unattended 24/7 service. We are gratified to see our color pictures used by the press to illustrate the hourly progress of storms, though the pictures are usually credited to "AP" instead of "NOAA-NASA".
The GOES views of snow storms are most useful for observing lake-effect snows and offshore intensity. Because snow forms at low altitude and is rather transparent to weather radar, the GOES cloud observations provide data that the weather radar doesn't see.
There are physical limits to snow storm predictability. In the last 30 years, chaos theory has demonstrated that weather and climate is inherently unpredictable to some limit because of natural instabilities in the atmosphere. That limit has been slowly pushed out by better observations and computer models. For instance, the 1978 East Coast blizzard, which developed much like the recent one, was unpredicted. All the 2010 blizzards have had good 3- to 5-day forecasts, with well-advertized uncertainty in the storm track. It's not clear how much past 5 days we can ever make a reliable weather forecast for a naturally unstable situation.
Storms are moved across the country by the jet stream, up around 35,000 ft. Low pressure systems form as unstable loops in the jet stream. Consequently, weather forecasters pay more attention to the upper air wind, which is the cause, than the surface pressure, which is the effect. Broadcast meteorologists concentrate on the surface conditions, because that is where their customers live and work.