Lake Storm "Aphid"

Lake Storm Aphid

Accumulation at the Buffalo Airport and NWS office
Type	Winter storm Snowsquall
Formed	October 11, 2006
Dissipated	October 13, 2006
Lowest pressure	980 mb (28.94 inHg)
Maximum snowfall or ice accretion	24 in (61.0 cm)[1]
Damage	530 Million USD
Areas affected	Erie County, Genesee County, Orleans County, Niagara County, Niagara Region
Part of the 2006–07 North American winter storms

The October 2006 Buffalo storm was an unusual early-season lake effect snow storm that hit the Buffalo, New York area and other surrounding areas of the United States and Canada, from the afternoon of Thursday October 12 through the morning of Friday October 13, 2006.^[2] It was called Lake Storm "Aphid" by the National Weather Service office in Buffalo in accordance with their naming scheme of lake snow effect storms for that year, which related to insects, though locals never used that terminology and have simply referred to it as the October Surprise^[3] or the October Storm.^[4]

History

On October 6, 2006, the first concerns of a possible lake effect snow (LES) event were raised, as medium and long range numerical weather models began to indicate conditions would be potentially favorable for lake effect precipitation, resulting in mixed snow-rain conditions. The long term forecast from the Buffalo office of the National Weather Service (NWS), as well as the Environment Canada discussion, both indicated possible LESs, but predicted that accumulations would be minimal.^[5]

By October 9, however, forecasters became concerned, given the high snow fall rates typical of snow squalls, accumulations would be possible even with temperatures above the freezing mark.^[6][7]

The Buffalo NWS and associated weather offices in the U.S and Canada did not issue any special advisories or make significant mention of the possibility of a major snow fall event until early afternoon on October 11.^[5] The NWS Buffalo issued a special advisory for the possibility of LES with minor accumulations of less than 2 inches (5.1 cm). Environment Canada followed suit issuing a special weather advisory for Canadian areas which would also be affected.

US Weather Map showing the low pressure system on October 12th, which was responsible for setting up the correct wind field and temperature gradient for lake effect snow off Lake Erie

The warm front associated with the developing low pressure system brought rain and thunderstorms to much of western New York and southern Ontario since the early morning hours of the 11th. The quickly approaching cold front passed the Port Colborne reporting station in Ontario at 11:35 pm EST October 11^[8] and the Buffalo Airport reporting station at 12:46 am EST October 12. With the passage of the cold front, polar continental air began to flood in behind it, and by 3:30 am EST, a lake effect squall began to form over Lake Erie in the strong westerly winds. The first lake effect rain was reported at 3:54 am EST at the Buffalo Airport.

The morning of October 12 saw the first deep concern among forecasters that a large snowfall event was possible.^[5] Indications at the time were still mainly that of a rainfall event with ice pellets and some wet snow mixed in. Towards the afternoon of the October 12, a warning was issued by the NWS Buffalo for the possibility of one to six inches of wet snow. Environment Canada also released a similar warning, advising the public that conditions like those found in typical winter LESs were possible, although only minor accumulation was expected, if any.

The first reports of ice in the form of small hail and ice pellets were reported at the Buffalo Airport at 12:14 pm,^[9] the temperature at the time was 41 °F (5 °C) after which it fell to 37 °F (3 °C) by 1:00 pm and 36 °F (2 °C) by 1:38 pm.^[9] Then at 1:51 pm, the first rain-snow mix was reported, and by 2:09 pm the rain had changed over entirely to snow, with the temperature dropping to 33.8 °F (1.0 °C) by 2:13 pm. This prompted the NWS in Buffalo to issue a LES warning at 2:36 pm for Niagara, Orleans, Northern Erie and Genesee counties.^[10] The warning, which would become effective as of 8:00 pm through to 6:00 am, called for one to three inches of snow, with possible accumulations of up to 6 inches (150 mm) well inland; the warning also made specific mention of possible tree damage and power outages.^[10]

The changeover to snow resulted from increased mixing within the squall; as colder air continued to flood in from the west, the atmosphere continued to destabilize vertically as the temperature difference between the lake water and the air several kilometers above grew larger. This allowed the squall to grow vertically in height and achieve much faster updraft speeds. At the 2:54 pm, radar indicated the first 20,000 ft (6,100 m) echo-top; at the same time, lightning was detected.

Despite heavy snow at times, accumulation was limited to grassy areas and locations which were not in direct contact with the ground, such as tree branches and power lines. The first notable ground accumulations started to occur just after 4:54 pm, when snow fall rates jumped to 1 inch per hour (2.5 cm/h) within thunderstorms inside the squall. At 6:48 pm, the NWS decided to update the LES warning, making it effective immediately and emphasizing extensive tree damage and the loss of power was imminent. By 8:00 pm, numerous reports of downed trees and power lines, and other damage began to flood the NWS Buffalo offices; by this time 3 in (7 cm) had accumulated on the ground.

As much as 24 inches (61 cm) fell in the Buffalo area, but in the nearby greater Toronto area, there was no storm at all.

Accumulation

NWS Buffalo radar estimated liquid accumulation

Accumulation track in inches (NWS)

Impact

Looking westward on Bird Avenue in Buffalo, New York just off Elmwood Avenue, the street is completely blocked by extensive tree damage

The storm's effects were highly localized: it dumped up to 3.5 feet (142 cm) of snow on some areas of the Buffalo metro region, while other areas saw very little snow, or no snow at all. The event was described by the NWS Office in Buffalo, New York, as "astounding", "unbelievable" and "incredible" and by the Toronto Star as "one of the most devastating snow storms in US history."^[2][12] It was also an example of the "particularly rare meteorological phenomenon" known as thundersnow.

These were the two snowiest October days recorded in Buffalo since the NWS began keeping track 137 years ago.

Wikinews has related news: Buffalo, New York snow storm closes schools, leaves nearly 400,000 without power National Guard dispatched to Buffalo, New York to help with storm cleanup "Friday the 13" Buffalo, New York snow storm in pictures

In affected areas, wet, heavy lake effect snow with a snow-water equivalent (SWE) ratio of between 6:1 and 12:1 (in comparison, the "powder" so prized by skiers is 25:1) and with a weight in excess of 9.8 pounds per square foot)^[13] piled onto trees which were still in full leaf, leading to significant damage [to trees] on a scale usually associated with hurricanes.^[2] An estimated 400,000 people were without power on Friday the 13th,^[14] some 100,000 households remained without power for a week,^[15] and a few thousand remained without power for ten days.^[16]

During the power outage, whenever generators went on sale, they typically ran out within thirty minutes. Lowe's and Home Depot stores were sold out immediately after the storm hit. Despite the conditions, a Buffalo Sabres hockey game against the New York Rangers was not postponed at HSBC Arena despite the power outage, and the game still had a full attendance of 18,690.

Effects of the storm were responsible for three fatalities between Thursday night, when the storm hit, and Friday morning, two from automobile accidents, and one from a falling branch. Ten more deaths followed in the first days of the aftermath, some from pre-existing health (usually heart) conditions and other causes, and several from carbon monoxide poisoning. Injuries blamed on the storm and its aftermath numbered in the several hundred and included those from chainsaw accidents and carbon monoxide poisoning due to people running generators inside homes.^[17]

Conservative initial damage estimates to clean up the estimated 6 to 8.6 million cubic yards of debris were at least $130 million USD,^[17][18] but even ten days after the storm hit, estimates of the number of tons of debris and the final costs of clearing them were "a moving target".^[19] The storm closed the Buffalo-Niagara International Airport for several hours on Thursday, October 12, and again on Friday, October 13, and closed a 100-mile (160-km) stretch of the New York State Thruway for several hours on Friday, October 13. Many, if not most, businesses were closed for at least a few days, and schools for at least a week. Most schools reopened on Monday, October 23, after six consecutive "snow days", but a few in the most heavily affected areas reopened later that week.^[20] Affected parts of Erie, Genesee, Orleans and Niagara counties in Western New York were declared a "major disaster" area by President George W. Bush on October 24, 2006.^[21]

Damage in the Buffalo Metro area

As many as 90 percent of the city's trees were estimated to be damaged,^[22][23] including many in the city's cherished parks and parkways, which were designed by landscape architect Frederick Law Olmsted. The damage constituted a significant setback to Buffalo's urban reforestation agenda,^[24] which had aimed to increase the city's tree canopy from its estimated 2003 levels of 12% to more closely approach the national average of 30%. Buffalo's suburbs, also hard hit by the storm, do have a canopy cover approaching 20 to 30%.^[25]

Although the two-foot snow cover melted by October 15,^[26] cleanup efforts were impeded in the first days after the storm by the tangle of fallen trees, fallen branches and downed power lines: power grid crews could not reach the downed power lines because of fallen trees, and tree removal crews could not clear debris because of the dangers of the downed power lines.^[27] Even after roads were cleared and power was restored, the cleanup and restoration was estimated to take weeks or months.^[16][28]

Response

Each jurisdiction had very similar Emergency Operation Plans and this made for a very consistent manner in how activities such as clean-up and response would be organized. Initially, the snow of this storm began to fall just like any other day in the winter season throughout the Buffalo region. Local fire departments were the first to respond to tree limbs blocking road ways, car accidents, and other incidents on top of "usual calls for help". As the storm worsened, police departments had officers staged at major intersections to help in the direction of traffic. Highway departments were called back into work to assist in the removal of tree limbs off roadways. At this point the snow started to come down at a heavier rate and the crews could not keep up with the trees that were obstructing roadways. As a result, plows could not get through to clear the snow and the whole region was "stranded in place". Falling tree limbs greatly contributed to the loss of electricity in all municipalities affected. Downed power lines that were charged also prevented people from driving over them (plowing of the streets). Local departments soon became overwhelmed and requested assistance from the town and city disaster co-coordinators. Requests were made to Erie County for assistance and then up to the state level. "On October 13, 2006, New York Governor George Pataki declared a state of emergency for Erie, Niagara, Genesee and Orléans Counties and dispatched State equipment and crews to assist in clearing debris. Local mayors and town supervisors also declared states of emergency in their respective municipalities. The Federal Emergency Management Agency ("FEMA") initially issued a temporary disaster declaration allowing for federal assistance, including financial, for local governments, but which did not address or provide for assistance to individual households affected by the Storm."(Szukala). From here the governor declared a state of emergency and eventually received a presidential declaration which declared a federal state of emergency. The Emergency Operations Plan allowed for effective communication between agencies which helped the disaster run in a smoother manner.^[29]

See also

• Great Lakes Blizzard of 1977
• Winter storms of 2006-07
• November 17–21, 2014 North American winter storm

References

External links

Wikimedia Commons has media related to October 13, 2006 snow storm in Buffalo, New York.

• National Weather Service Forecast Office in Buffalo, New York
• Bruce Jackson A Report from Buffalo: Thundersnow October 18, 2006
• David J. Colligan, "How prepared was Buffalo when this Tree-Devastating Storm Hit?", Buffalo Rising, October 20, 2006
• Reuters: Winter sweeps in early to parts of northern U.S. October 13, 2006
• BBC News In pictures: US snowstorm
• Storm Damage photo gallery