Severe (D2) drought conditions continued into the beginning stages of December 2024 across portions of southwestern Somerset County. Beneficial snowfall allowed for improvement across the area, with drought status dropping below severe criteria during the first week of December.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS CTP wrote it up.
Severe (D2) drought conditions continued into the beginning stages of December 2024 across portions of southwestern Somerset County. Beneficial snowfall allowed for improvement across the area, with drought status dropping below severe criteria during the first week of December.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS State College, PA wrote its last area forecast discussion before the first event at Nov 30, 11:03 PM EST, 57 minutes earlier.
Area Forecast Discussion National Weather Service State College PA 1103 PM EST Sat Nov 30 2024 .SYNOPSIS... * Wind chills will drop as low as the single digits tonight weekend with below average temperatures continuing through the first week of December. * A lull in the snow this weekend will precede multiple bouts of lake effect and upslope snow again next week. && .NEAR TERM /UNTIL 6 AM SUNDAY MORNING/... Earlier flurries translating across the Central Mountains have dissipated, and large scale subsidence has allowed cloud cover to erode and dissipate over all but the NW and NC Mountains. Boundary layer trajectories keeping organized lake effect snow bands well north of the PA/NY border late this evening, and with additional backing flow tonight will continue that way. It should be dry overnight. A batch of mid level clouds associated with a moisture challenged Clippe will slide across the Laurel Highlands and SC Mountains, while low clouds hang tough over the NW Mountains and parts of the NC Mountains. Elsewhere mostly clear skies will be seen. Overnight mins will be 15-20F with a few spots holding in the L20s. The only thing holding us back from single digits is the wind. && .SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/... CLouds from the aforementioned clipper passing to our south may linger throughout the day, but should decrease for the most part. Much of the area will be mostly sunny. The mean llvl wind will veer jst 10-20 degs thru the day, but will continue to veer a little more Sunday night. That will push lake effect clouds and snow into the NWrn mtns. The cross-lake fetch is then favorable for a connection to LH to set up and provide more fuel and lower stability thru the night. Expect the snow to ramp up, at least for Warren and McKean counties. The potential for >6" accumulation over the next 36 hrs is then up near 50% for at least Warren Co. We'll be hoisting a watch for LES for Warren shortly. Maxes will be very similar to Saturday. Even though the wind becomes a little lighter Sunday night, the return of clouds should keep temps at or slightly above Sat night's values, esp in the NW. && .LONG TERM /MONDAY THROUGH SATURDAY/... No changes to the extended period with this update, as the duration Winter Storm Watch continues into the long-term period with some of the heaviest snowfall falling in the Monday night into Tuesday morning timeframe, although heavier snowfall could continue into the Tuesday morning commute. Lingering snow showers will be possible throughout the day on Tuesday, so have kept mentions of snow showers although they could be more scattered in nature. Model guidance remains persistent on boundary layer flow becomes more west- northwesterly on Monday and into Tuesday behind a departing shortwave which will allow for lake effect snow bands to move into northwestern Pennsylvania. Most guidance suggests that the heaviest snowfall will be confined to Warren and McKean counties with a Huron connection band potentially bringing more snowfall to portions of McKean County than the previous day's lake effect snow event. By the middle of the week, flow once again becomes more southwesterly ahead of an approaching low pressure system. Model guidance is beginning to converge towards this low tracking just north/over the Great Lakes, which will bring light snowfall to most of Central Pennsylvania Wednesday into Thursday. Chances for precipitation across SE PA will top out ahead of sunrise on Thursday before decreasing as the day progresses. Cyclonic flow remains overhead through the end of the week and will support continued upslope snow showers over the western mountains and lake effect snow over the northwest. Temperatures will remain well below normal through the extended period with highs generally in the 20s and 30s and lows in the teens and 20s. && .AVIATION /04Z SUNDAY THROUGH THURSDAY/... Late evening update. BFD remain clear this evening, this being the main change from earlier this evening. Earlier discussion below. 00Z TAFS sent. Took out LLWS for JST, borderline for any site, given westerly flow. Winds more from the southwest now, will limit clouds and snow showers off the Great Lakes overnight and Sunday. Other than BFD, conditions will be VFR overnight. BFD may clear out at times. I did add a group late Sunday at BFD for lower CIGS and snow showers again, as the next cold front (more like a wind shift line) moves toward western sections of central PA by early evening. Winds will shift more to the west-northwest Sunday night into Tuesday, resulting in more snow showers across the region, excluding the sites like MDT and LNS. Outlook... Sun Night-Tue...Continued windy with west-northwest winds. Prolonged chances for MVFR/IFR conditions with snow showers across the north and west. Wed...Higher chances for widespread restrictions with snow in a clipper system. Thu...Precipitation tapers off across the SE, with restrictions continuing across NW PA in snow showers. && .CTP WATCHES/WARNINGS/ADVISORIES... Winter Storm Watch from Sunday evening through Tuesday morning for PAZ004. && SYNOPSIS...DeVoir/Dangelo/Banghoff NEAR TERM...DeVoir/Dangelo SHORT TERM...Dangelo LONG TERM...Bauco/NPB AVIATION...Martin
Hazardous Weather Outlook National Weather Service State College PA 300 PM EST Sat Nov 30 2024 PAZ019-026>028-035-036-045-046-049>053-056>059-063>066-012000- Southern Centre-Huntingdon-Mifflin-Juniata-Fulton-Franklin- Southern Clinton-Southern Lycoming-Union-Snyder-Montour- Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon-Cumberland- Adams-York-Lancaster- 300 PM EST Sat Nov 30 2024 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Sunday through Friday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ005-006-010>012-017-018-024-025-033-034-037-041-042-012000- McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Cambria-Blair-Somerset-Bedford-Tioga- Northern Lycoming-Sullivan- 300 PM EST Sat Nov 30 2024 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Lake effect and upslope snow showers return Monday and Tuesday next week. A clipper system could bring accumulating snowfall by the middle of the week. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ004-012000- Warren- 300 PM EST Sat Nov 30 2024 ...WINTER STORM WATCH IN EFFECT FROM SUNDAY EVENING THROUGH TUESDAY MORNING... This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Please listen to NOAA Weather Radio or go to weather.gov/StateCollege on the internet for more information about the following hazards. Winter Storm Watch. Additional lake effect snow is possible through much of the upcoming week. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The national radar mosaic for the moment the first event began.
1 drought. Local standard time, as filed.
D2 (severe) drought conditions continued across southwestern Somerset County during the early stages of December 2024, with continued snowfall allowing for severe drought allowed for relief across the county.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2024Every state in 2024This day in weather historyWarnings in Pennsylvania, December 2024
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1220987.