| 2005-12-16 |
A complex winter storm brought snow, sleet, and freezing rain to central Pennsylvania. Warm air penetrated aloft early in the event which limited snowfall totals in southern areas of the State where the snow rapidly changed to sleet. The low-level cold air slowly retreated and most southern areas eventually turned to rain, after a period of freezing rain.
Snowfall ranged from around 7 inches along the New York border to around 5 inches in State College, and 0.5 to 1 inches in southernmost regions of the State. |
| 2005-12-14 |
The combination of a snow pack, below normal precipitable water, and very light winds produced nearly ideal radiational cooling conditions over the eastern United States on Wednesday morning, 14 December 2005. New low temperature records were set at Harrisburg and Williamsport, Pennsylvania. The low at Harrisburg (KMDT) was +4 surpassing he +9F reading set in 1958. The low at Williamsport was -1F surpassing he low of +3F set in 1962. Many other locations tied or set new record lows for the date. |
| 2005-12-08 |
A retreating anticyclone and an approaching wave from the west produced a widespread 5-10 inch snowfall over most of central Pennsylvania. The snow came on fast from the southwest. A secondary surface low developed along the coast early on the 9th. Most of the snow came with the strong low-level jet and the warm advection prior to the transfer of energy to the coast. |
| 2005-12-04 |
Short wave produced light snow overnight Saturday into Sunday. Widespread 1-3 inch snowfall over most of central Pennsylvania and southern New York. |
| 2005-11-29 |
Frontal system with a surge of warm air ahead of it on the 28th and 29th. Then heavy rains with some flooding and severe weather in the southeast. This event had a warm instrusion with very high temperatures in the 60s and some 70s. Then rains head of the front produced widespread 2 inches and some locally heavier amounts over 3 inches. This produced flooding. Severe thunderstorms affect the southern areas in the evening hours. Very late season severe weather. |
| 2005-11-24 |
Thanksgiving snow with general 1-3 inch snowfall over western and central Pennsylvania. Good example of SREF plume diagrams assisting with the timing and type of precipitation. Strong winds behind this system brought in arctic air and lake effect snow to Warren County. Maximum reported snowfall was 12 inches in Russell. |
| 2005-11-09 |
Cold air damming event with overrunning thunderstorms which remained decoupled. Later, with the occluded front, many rotating storms were able to produce damage in western areas. The strongest storm, in terms of winds affected Elk and McKean counties. |
| 2005-11-06 |
Squall line with widespread high winds associated with convection. This case show model jumpiness with the changing character of the front as forecast by the GFS. In the conclusions, examples of SREF plumes show how well the SREFs forecast the onset and duration of precipitation and the instability for a late season severe weather event. This event in PA was the same front that produced deadly tornadoes in Indiana earlier in the day. |
| 2005-10-25 |
Heavy elevation snow of 25 October 2005. 1-2 inches in most valley location with over 12 inches in the highest terrain. Good example of ensemble plume diagrams and an early season snow forecast challenge. The event was further complicated by the focus on Hurricane Wilma as it chugged up and off the East Coast. |
| 2005-10-08 |
Heavy rain event, well forecast by the SREF, produced extreme rainfall amounts. Over 10 inches of rain in Lancaster County, PA brought flooding. The state high was 12.20 in Truce. Farther north, heavy rains pounded New England producing severe flooding in Chesire County, NH. Antecedent drought conditions may have spared a more widespread flooding event. Precipitable water and low-level V-wind anomalies were 3-5 standard deviations above normal with this event. |
| 2005-09-16 |
Lone supercell formed near Cameron-Elk County border and moved to the east-northeast. Produced reported or detected damage in Potter and Tioga counties. |
| 2005-08-31 |
Heavy rains and tornadoes associated with the remnants of Hurricane Katrina. This document also provides an overview of SREF performance of the forecasting the landfall and potential impacts of Katrina. |
| 2005-08-12 |
Large, long-lived, and persistent supercell in rural Lycoming County in the afternoon. KBGM had 60KTS inbound with rotating storm. Hail and wind damage in Sullivan and Columbia County. The storm moved eastward across Luzerne and Carbon County. A few other rotating storms this afternoon. |
| 2005-08-12 |
Lycoming and Sullivan County supercell thundertorm. This storm produced no known damage in Lycoming county though there were observations of the tornado. After 2 weeks, a damage swath was found and surveyed in Sullivan County. |
| 2005-07-27 |
Heat wave ending cold front triggered thunderstorms. Line of thunderstorms brought severe weather to the northwestern areas on the afternoon and evening of the 26th. The cold front on the 27th brought more severe weather to the eastern section of the stat |
| 2005-07-26 |
A large ridge brought temperatures over 100F on Saturday 22 July in the Midwest. The heat hit Chicago on the 23rd with a 102 reading. Overnight convection and an MCS ushered in the heat into Pennsylvania on the 24th. Temperatures soared into the 90s Monda |
| 2005-07-13 |
Benton downburst. Northeast flow thunderstorm, winds on west slopes did severe damage to trees in Columbia County. Most of the damage was focused in Benton, PA. |
| 2005-07-08 |
Moderate rainfalls ending early season drought associated with remnants of tropical storm Cindy. Strong easterly winds produced 2-3 inches of rainfall in southeastern PA and 6 inches in the mountains of Virginia. |
| 2005-06-14 |
Late day convection that lacked instability and dynamics to sustain itself. Damage to northern tier counties. |
| 2005-06-13 |
Pulse storms of 9 and 13 June. Period of strong subtropical Ridge with above normal precipitable water. Some tips on warning for these pulse like storms. |
| 2005-06-13 |
Pulse storms of 9 and 13 June. Period of strong subtropical Ridge with above normal precipitable water. Some tips on warning for these pulse like storms. |
| 2005-06-06 |
Hail, high winds, and two tornadoes. Good CAPE forecasts 2 days out by the SREF. One of the largest severe event in the 12 year history of the WFO in State College. |
| 2005-04-23 |
Late season snow western Pennsylvania and Ohio. Well forecast cold outbreak after prolonged warm period in mid-April. Snow in PA 1-5 inches with over 12 inches in OH and MI. MREF data used as forecast example with plume diagrams. |
| 2005-04-02 |
Heavy rains. Maddox Synoptic type. Well forecast by NCEP SREF for heavy rains. SREF showed possible snow on western edges of this spring storm. Heavy snows were reported in Ohio, Pennsylvania, New York, and parts of West Virginia. |
| 2005-03-28 |
Heavy rain event in the Mid-Atlantic region of 28-29 March 2005. Good forecast methodology using the SREF and at near-term the workstation Eta. Rains of in excess of 3 inches in some Pennsylvania Locations. Flooding with a few river points going over floo |
| 2005-03-23 |
Wet snow over the region. Was not well forecast as models were too warm in PBL. However, this case had accumulating snow on roads at mid-afternoon despite sun angles. Example of impact of intensity during late season snows. SREF data used to show forecast |
| 2005-02-28 |
Snow storm along east coast with 2 phasing waves as a serious forecast issue. SREF and Eta had some difficulty with this storm, most likely due to the phasing issues. Good 5-10 inch snowfall over most of Pennsylvania. |
| 2005-02-24 |
Long duration snow event with near 15:1 snow ratios. Heavy snow in 12-hours over much of southern tier. Initially, a storm with a lot of QPF amount and cyclone track uncertainty. |
| 2005-02-21 |
Winter storm which had a change over to ice pellets and freezing rain. Went to rain in the south. This storm was well forecast by the SREF and posed a snow amount forecast issue. It also occured as the NAO finally went negative late in the winter. |
| 2005-01-22 |
Blizzard of 2005 with snow from upper-Mid West to East Coast. Very heavy snow in southeastern New England. Contains to John LaCorte snow analysis though missing Maryland data. This was a good case to evaluate the use of the NCEP Ensemble Prediction system |
| 2005-01-19 |
Clipper snow storm for Pennsylvania. The low past to the north, so not anticipated to be a big event. However, cold air and good crystal growth produced high snow ratios. This led to a widespread 2-3 inch event with some locally higher amounts. Snow fell |
| 2005-01-16 |
Clipper event brings widespread 1-2 inches of snow over most of central Pennsylvania. Lesser amounts in southeast and more in the mountains in the west. |
| 2005-01-14 |
Warm episode of 13 January 2005. Though 60s were common over western Pennsylvania on the 12th. Rainbands brought 1-2 inches of rain to southeast and flooding. Well forecast frontal passage by the NCEP MREF/SREF systems. |
| 2005-01-11 |
First snow State College. Mixed precipitation event with SREF forecasts of temperatures and POPS showing good short-term forecasts. Short-term forecasts also tended toward heavy rains in southwest Pennsylvania. |
| 2005-01-08 |
Marginal ice storm in hills of central Pennsylvania and most areas to north. Good SREF forecast application example. |
| 2005-01-06 |
Jan 5-6 central Pennsylvania ice storm. Over 1 inch of ice with power outages in the higher elevations areas of central Pennsylvania. Some areas of snow along the New York border. Most significant ice storm in central PA in 10 years. Used as an SREF case |
