Back-to-back powerful Pacific storm systems to impact the Pacific Northwest and northern California through the end of this week with heavy rain, flooding, strong winds, and higher elevation mountain snow. A strong, long-duration atmospheric river will accompany the Pacific storms, bringing excessive rainfall and flash flooding to southwest Oregon and northwest California through the week. Read More >
Overview
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A wave of low pressure developed near the North Carolina Outer Banks early on February 7, 2021. The low gradually strengthened in the presence of favorable jet dynamics, and moved quickly northeastward over the course of the day, tracking a couple hundred miles east of the mid-Atlantic coast. Precipitation overspread the region during the early morning hours, and had already departed by mid-afternoon. Temperatures were generally cold enough to support precipitation falling as snow, though areas close to the coast saw mixed rain and snow. Meteorologically, the event was notable for having pronounced banding features. In particular, a heavy band of snow produced 6 to 10 inches of snow in just a few hours over southeast Pennsylvania and central and northern New Jersey. Most other parts of the area saw measurable snow, but with lesser amounts. No other hazards (such as high winds or coastal flooding) were present in association with this quick hitting storm. This event came less than a week after the conclusion of a major winter storm which had brought a widespread 12 -24+ inches of snow to central and northern portions of the local area, part of an active stretch of winter weather which continued into mid-February.
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 Map of locally analyzed Storm Total Snowfall for the 7 February 2021 event. |
Synoptic Overview at 12z 7 Feb 2021 (courtesy of SPC)
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| Figure 1: 250-mb analysis | Figure 2: 300-mb analysis | Figure 3: 500-mb analysis |
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| Figure 4: 700-mb analysis | Figure 5: 850-mb analysis | Figure 6: 925-mb analysis |
Synoptic Overview at 00z 8 Feb 2021 (courtesy of SPC)
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| Figure 7: 250-mb analysis | Figure 8: 300-mb analysis | Figure 9: 500-mb analysis |
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| Figure 10: 700-mb analysis | Figure 11: 850-mb analysis | Figure 12: 925-mb analysis |
Surface Analysis (courtesy of WPC)
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| Figure 13: 09z analysis | Figure 14: 12z analysis | Figure 15: 15z analysis |
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| Figure 16: 18z analysis | Figure 17: 21z analysis | Figure 18: 00z analysis |
Observed Soundings (Courtesy of the University of Wyoming)
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| Figure 19: Long Island, NY sounding from 12z February 7. | Figure 20: Sterling, VA sounding from 12z February 7. | Figure 21: Wallops Island, VA sounding from 12z February 7. |
NOUS41 KPHI 080100 PNSPHI DEZ001>004-MDZ012-015-019-020-NJZ001-007>010-012>027-PAZ054-055-060>062-070- 071-101>106-081300- Public Information Statement National Weather Service Mount Holly NJ 800 PM EST Sun Feb 7 2021 ...SNOWFALL REPORTS... Location Amount Time/Date Provider ...Delaware... ...Kent County... Woodside 4.8 in 0240 PM 02/07 Trained Spotter 5 NW Harrington 3.5 in 0215 PM 02/07 Trained Spotter Smyrna 3.0 in 0240 PM 02/07 Broadcast Media West Dover 2.8 in 0529 PM 02/07 Mesonet Dover 2.5 in 1158 AM 02/07 Public Magnolia 2.5 in 0122 PM 02/07 Public Harrington 2.3 in 0532 PM 02/07 Mesonet 1 SSE Woodside 2.3 in 1215 PM 02/07 Trained Spotter ...New Castle County... Greenville 3.4 in 0524 PM 02/07 Mesonet Middletown 2.0 in 0130 PM 02/07 Public Blackbird 1.7 in 0528 PM 02/07 Mesonet 1 NW Wooddale 1.6 in 0421 PM 02/07 Cocorahs Hockessin 1.5 in 0419 PM 02/07 Trained Spotter Newark 1.5 in 0227 PM 02/07 Public Claymont 1.1 in 0523 PM 02/07 Mesonet Port Penn 1.1 in 0529 PM 02/07 Mesonet Glasgow 1.0 in 1048 AM 02/07 Public New Castle 0.8 in 0527 PM 02/07 Mesonet Talley 0.8 in 0522 PM 02/07 Mesonet Prices Corner 0.4 in 0525 PM 02/07 Mesonet New Castle County Airport 0.2 in 0100 PM 02/07 ASOS ...Sussex County... Ellendale 1.6 in 0533 PM 02/07 Mesonet Bridgeville 1.2 in 0535 PM 02/07 Mesonet Laurel 0.8 in 0535 PM 02/07 Mesonet Stockley 0.7 in 0532 PM 02/07 Mesonet ...Maryland... ...Caroline County... Henderson 4.0 in 0311 PM 02/07 Trained Spotter Denton 1.0 in 1100 AM 02/07 Trained Spotter ...New Jersey... ...Atlantic County... 2 ENE Minotola 4.4 in 0454 PM 02/07 Trained Spotter Hammonton 3.7 in 0345 PM 02/07 CO-OP Observer Estell Manor 2.9 in 0330 PM 02/07 CO-OP Observer Somers Point 1.3 in 0145 PM 02/07 Public 3 SE Egg Harbor Twp 1.0 in 0126 PM 02/07 Public Brigantine 0.9 in 0214 PM 02/07 Public Pleasantville 0.7 in 0200 PM 02/07 Public Atlantic City International T in 0100 PM 02/07 ASOS ...Burlington County... Moorestown 5.1 in 0615 PM 02/07 Trained Spotter Medford 5.0 in 0540 PM 02/07 Public Southampton Twp 4.3 in 0403 PM 02/07 Public Columbus 4.2 in 0557 PM 02/07 Public Burlington 4.0 in 0200 PM 02/07 Trained Spotter Delran 4.0 in 0541 PM 02/07 NWS Employee Hainesport 4.0 in 0445 PM 02/07 Trained Spotter 1 ENE Westampton Twp 3.7 in 0400 PM 02/07 Official NWS Obs Marlton 3.5 in 0304 PM 02/07 Trained Spotter Westampton Twp 3.5 in 0200 PM 02/07 Trained Spotter Cooperstown 3.4 in 0358 PM 02/07 NWS Employee 1 NW South Jersey Regional A 3.2 in 0446 PM 02/07 NWS Employee Mount Laurel 3.1 in 0417 PM 02/07 Cocorahs Florence 3.0 in 0319 PM 02/07 Trained Spotter Pemberton 3.0 in 0200 PM 02/07 Public 1 NNW Chesterfield 2.0 in 1225 PM 02/07 Public ...Camden County... Cherry Hill 4.8 in 0240 PM 02/07 Public 1 E Gibbsboro 3.7 in 0410 PM 02/07 NWS Employee Lindenwold 3.2 in 0300 PM 02/07 Trained Spotter Berlin 3.0 in 0118 PM 02/07 Public Blackwood 3.0 in 0613 PM 02/07 Trained Spotter 1 E Somerdale 2.6 in 0127 PM 02/07 NWS Employee Somerdale 2.5 in 0421 PM 02/07 Trained Spotter Oaklyn 1.0 in 1233 PM 02/07 Public ...Cape May County... Avalon 1.0 in 0405 PM 02/07 Trained Spotter ...Cumberland County... Hopewell Twp. 8.5 in 0330 PM 02/07 Trained Spotter Vineland 2.0 in 0257 PM 02/07 Trained Spotter ...Gloucester County... Malaga 4.5 in 0615 PM 02/07 Trained Spotter Washington Twp 4.5 in 1230 PM 02/07 Trained Spotter Deptford Twp 3.0 in 0455 PM 02/07 Public West Deptford Twp 2.5 in 0330 PM 02/07 Public Mantua 2.0 in 0218 PM 02/07 Public Pitman 1.8 in 0502 PM 02/07 Trained Spotter ...Hunterdon County... Ringoes 8.1 in 0340 PM 02/07 Trained Spotter Flemington 7.1 in 0315 PM 02/07 Cocorahs White House Station 7.0 in 1233 PM 02/07 Trained Spotter Raritan Twp 5.8 in 1145 AM 02/07 Trained Spotter Readington 5.5 in 0330 PM 02/07 Trained Spotter Franklin Twp 4.0 in 0250 PM 02/07 Trained Spotter Tewksbury Twp 4.0 in 0300 PM 02/07 Trained Spotter ...Mercer County... Princeton 7.0 in 0330 PM 02/07 Trained Spotter Hamilton Square 5.7 in 0618 PM 02/07 Trained Spotter Hamilton Twp 5.5 in 0624 PM 02/07 Public 2 SW Pennington 5.4 in 0507 PM 02/07 Trained Spotter Lawrenceville 5.1 in 0220 PM 02/07 Public Ewing 4.9 in 0230 PM 02/07 NWS Employee 2 SW Trenton Mercer Airport 4.0 in 0510 PM 02/07 Public Mercerville 3.5 in 0227 PM 02/07 Trained Spotter 2 S East Windsor Twp 3.0 in 0100 PM 02/07 Public Trenton Mercer Airport 3.0 in 0113 PM 02/07 Trained Spotter ...Middlesex County... Cheesequake 7.1 in 0510 PM 02/07 Trained Spotter Woodbridge 7.0 in 0300 PM 02/07 Public Cranbury 6.3 in 0400 PM 02/07 Public South Plainfield 6.2 in 0550 PM 02/07 Trained Spotter Spotswood 6.0 in 0456 PM 02/07 Public 1 WNW Hopelawn 5.8 in 0556 PM 02/07 Trained Spotter 1 SSW Plainsboro Township 5.7 in 0521 PM 02/07 NWS Employee North Brunswick 5.6 in 0514 PM 02/07 Trained Spotter Manalapan Twp 5.3 in 0519 PM 02/07 Trained Spotter East Brunswick 5.0 in 0300 PM 02/07 Public Edison 5.0 in 0310 PM 02/07 Trained Spotter Metuchen 4.7 in 0314 PM 02/07 Public Parlin 4.6 in 0200 PM 02/07 Trained Spotter New Brunswick 3.0 in 0430 PM 02/07 Trained Spotter ...Monmouth County... Holmdel 7.0 in 0630 PM 02/07 Trained Spotter Matawan 6.8 in 0555 PM 02/07 Trained Spotter Freehold 6.3 in 0607 PM 02/07 Trained Spotter 1 SE Englishtown 6.0 in 0553 PM 02/07 Trained Spotter Cream Ridge 5.5 in 0530 PM 02/07 Trained Spotter Colts Neck 5.1 in 0423 PM 02/07 Public Hazlet 5.0 in 0629 PM 02/07 Trained Spotter Navesink 5.0 in 0518 PM 02/07 Trained Spotter 3 NW Wanamassa 4.8 in 0515 PM 02/07 Trained Spotter Aberdeen 4.5 in 0300 PM 02/07 Trained Spotter Keyport 4.5 in 0255 PM 02/07 Trained Spotter 3 NE Perrineville 4.5 in 0200 PM 02/07 Trained Spotter Marlboro 2.8 in 0103 PM 02/07 Public Leonardo 2.5 in 0417 PM 02/07 Public ...Morris County... Millington 8.0 in 0220 PM 02/07 Public Chatham 7.8 in 0100 PM 02/07 Public East Hanover 7.6 in 0400 PM 02/07 Trained Spotter 1 SE Lake Hiawatha 6.2 in 1222 PM 02/07 Trained Spotter Rockaway 6.0 in 0659 PM 02/07 Trained Spotter Randolph 5.5 in 0205 PM 02/07 Trained Spotter Denville 5.2 in 0415 PM 02/07 Trained Spotter Green Pond 4.5 in 0628 PM 02/07 Public Marcella 4.5 in 0454 PM 02/07 Trained Spotter Budd Lake 4.1 in 0422 PM 02/07 Public Butler 4.0 in 0309 PM 02/07 Trained Spotter Flanders 4.0 in 0400 PM 02/07 Trained Spotter Montville 4.0 in 0315 PM 02/07 Trained Spotter 2 E Randolph 4.0 in 1215 PM 02/07 Cocorahs Lake Hopatcong 3.7 in 0330 PM 02/07 Trained Spotter 2 NNW Rockaway 3.5 in 1214 PM 02/07 Public 1 S Mount Arlington 2.0 in 1104 AM 02/07 Cocorahs ...Ocean County... Manchester Twp 5.7 in 0457 PM 02/07 Public Jackson 4.9 in 0659 PM 02/07 Trained Spotter 2 SE Jackson 4.8 in 0200 PM 02/07 Trained Spotter 2 SSW Jackson 4.4 in 0640 PM 02/07 Public Whiting 4.0 in 0422 PM 02/07 Public Lakewood 3.5 in 0437 PM 02/07 Trained Spotter Brick 3.0 in 0557 PM 02/07 Public Toms River 3.0 in 0230 PM 02/07 Public Barnegat 2.5 in 0442 PM 02/07 Trained Spotter Berkeley Twp 2.5 in 0315 PM 02/07 Trained Spotter Forked River 2.0 in 0415 PM 02/07 Trained Spotter Tuckerton 1.7 in 0438 PM 02/07 Trained Spotter 3 W Leisure Village East 1.5 in 1250 PM 02/07 Public ...Somerset County... Hillsborough Twp 8.8 in 1121 AM 02/07 Public Bedminster Twp 8.1 in 0230 PM 02/07 Public 2 SSE Bedminster Twp 8.0 in 0155 PM 02/07 Public Warren 8.0 in 0300 PM 02/07 Public Basking Ridge 7.5 in 0107 PM 02/07 Trained Spotter Watchung 7.5 in 0330 PM 02/07 Trained Spotter Bridgewater 7.0 in 0400 PM 02/07 Trained Spotter Manville 6.5 in 0200 PM 02/07 Trained Spotter Belle Mead 6.4 in 0406 PM 02/07 Trained Spotter North Plainfield 6.3 in 0210 PM 02/07 Trained Spotter Somerset 6.3 in 0627 PM 02/07 Trained Spotter Rocky Hill 5.5 in 0256 PM 02/07 Trained Spotter ...Sussex County... Hopatcong 3.7 in 0324 PM 02/07 Trained Spotter Andover 2.6 in 0200 PM 02/07 Trained Spotter Glenwood 1.9 in 0726 PM 02/07 Trained Spotter 3 N Pellettown 1.6 in 0626 PM 02/07 Trained Spotter Wantage Twp 1.5 in 0206 PM 02/07 Public ...Warren County... Phillipsburg 3.3 in 0638 PM 02/07 Trained Spotter Hackettstown 3.2 in 0305 PM 02/07 Public Liberty Twp 2.8 in 0308 PM 02/07 Public Blairstown 1.7 in 0310 PM 02/07 Cocorahs ...Pennsylvania... ...Berks County... Union Twp 6.1 in 0106 PM 02/07 Public Bechtelsville 6.0 in 0130 PM 02/07 Public Douglassville 4.2 in 0253 PM 02/07 Trained Spotter Huffs Church 4.0 in 0145 PM 02/07 Trained Spotter Fleetwood 3.5 in 0200 PM 02/07 Trained Spotter 3 ESE Temple 3.5 in 0125 PM 02/07 Trained Spotter West Wyomissing 3.1 in 1245 PM 02/07 Public Boyertown 3.0 in 1100 AM 02/07 Public 1 S Shillington 3.0 in 0125 PM 02/07 Trained Spotter Spring Twp 2.8 in 0159 PM 02/07 Public Bern Twp 2.3 in 1200 PM 02/07 Trained Spotter 1 SSW Leesport 1.5 in 1050 AM 02/07 Public ...Bucks County... Buckingham Twp 10.3 in 0417 PM 02/07 Public Chalfont 10.0 in 0105 PM 02/07 Trained Spotter New Britain 10.0 in 0505 PM 02/07 Public Pipersville 10.0 in 0109 PM 02/07 Public Hilltown Twp 8.4 in 0255 PM 02/07 NWS Employee Furlong 8.2 in 0351 PM 02/07 Trained Spotter Fricks 8.0 in 0727 PM 02/07 NWS Employee Plumstead Twp 7.1 in 0100 PM 02/07 Trained Spotter 3 NNE Horsham Twp 7.0 in 1100 AM 02/07 Public Lahaska 7.0 in 0127 PM 02/07 Public 2 SW Lumberville 7.0 in 0117 PM 02/07 Public New Hope 7.0 in 0315 PM 02/07 Trained Spotter Warminster 6.8 in 0220 PM 02/07 Trained Spotter Newtown Grant 6.4 in 0340 PM 02/07 Trained Spotter Yardley 6.0 in 0432 PM 02/07 Public Langhorne 5.8 in 0255 PM 02/07 Trained Spotter 1 NE Telford 5.8 in 1122 AM 02/07 Trained Spotter Lower Makefield Twp 5.5 in 0155 PM 02/07 Public Solebury Twp 5.5 in 1142 AM 02/07 Public 1 WNW Quakertown 5.0 in 0410 PM 02/07 Public Trumbauersville 5.0 in 0300 PM 02/07 Trained Spotter 1 SSE Langhorne 3.8 in 0330 PM 02/07 Trained Spotter Springtown 3.8 in 0259 PM 02/07 Trained Spotter ...Carbon County... Lower Towamensing Twp 1.5 in 0130 PM 02/07 Trained Spotter ...Chester County... Malvern 9.0 in 1159 AM 02/07 Public East Nantmeal Twp 8.8 in 1230 PM 02/07 Public West Whiteland Twp 8.8 in 1100 AM 02/07 Public Downington 8.5 in 1100 AM 02/07 Public Elverson 8.3 in 0154 PM 02/07 Trained Spotter 2 SSE East Whiteland Twp 8.0 in 1200 PM 02/07 Public Uwchlan Twp 8.0 in 0200 PM 02/07 Trained Spotter Chester Springs 6.8 in 0538 PM 02/07 Mesonet Phoenixville 6.7 in 1055 AM 02/07 Public Coatesville 6.5 in 1245 PM 02/07 Public 2 SE Exton 6.4 in 0429 PM 02/07 Trained Spotter Atglen 6.0 in 0538 PM 02/07 Mesonet Paoli 6.0 in 0230 PM 02/07 Trained Spotter Glenmoore 5.5 in 0245 PM 02/07 Trained Spotter Devault 5.3 in 0536 PM 02/07 Mesonet Marshallton 4.7 in 0537 PM 02/07 Mesonet West Chester 4.2 in 0310 PM 02/07 Public Jennersville 4.0 in 0250 PM 02/07 Public Oxford 3.5 in 0302 PM 02/07 Trained Spotter Lincoln University 3.0 in 1030 AM 02/07 Trained Spotter ...Delaware County... Wayne 6.7 in 1211 PM 02/07 Trained Spotter Villanova 5.3 in 0155 PM 02/07 Trained Spotter Thornton 5.1 in 0200 PM 02/07 Trained Spotter Media 4.5 in 0245 PM 02/07 Public Chadds Ford Twp 4.2 in 0252 PM 02/07 Trained Spotter Springfield Twp 3.5 in 0235 PM 02/07 Trained Spotter Folsom 2.5 in 0109 PM 02/07 Public Upper Chichester Twp 1.5 in 0127 PM 02/07 Trained Spotter Upper Darby 1.5 in 0300 PM 02/07 Public ...Lehigh County... Coopersburg 4.8 in 0227 PM 02/07 Public Zionsville 4.3 in 0317 PM 02/07 Trained Spotter Center Valley 4.1 in 0354 PM 02/07 Public Salisbury Twp 3.6 in 0404 PM 02/07 Trained Spotter Macungie 3.4 in 0130 PM 02/07 Trained Spotter Lehigh Valley International 2.7 in 0100 PM 02/07 ASOS Emmaus 2.2 in 0200 PM 02/07 Public Whitehall Twp 1.8 in 0100 PM 02/07 Public Germansville 1.6 in 0120 PM 02/07 Public ...Monroe County... Mount Pocono 1.5 in 0235 PM 02/07 Public Arlington Heights 1.3 in 0314 PM 02/07 Trained Spotter Pocono Pines 1.0 in 0316 PM 02/07 Trained Spotter ...Montgomery County... Lansdale 9.0 in 0300 PM 02/07 Trained Spotter Valley Forge 8.5 in 0329 PM 02/07 Trained Spotter Royersford 8.0 in 0153 PM 02/07 Trained Spotter Norristown 7.7 in 0210 PM 02/07 Trained Spotter Harleysville 7.5 in 1130 AM 02/07 Public Upper Dublin Twp 7.4 in 0300 PM 02/07 Public Willow Grove 7.3 in 0232 PM 02/07 Trained Spotter Bryn Mawr 7.0 in 0427 PM 02/07 Public Horsham 7.0 in 0300 PM 02/07 Public Schwenksville 7.0 in 0214 PM 02/07 Trained Spotter Skippack 6.8 in 1255 PM 02/07 Trained Spotter Trappe 6.8 in 1210 PM 02/07 Trained Spotter Telford 6.5 in 0110 PM 02/07 Trained Spotter Salford Twp 6.2 in 0514 PM 02/07 Trained Spotter Hatboro 6.1 in 1134 AM 02/07 Public North Wales 6.0 in 1145 AM 02/07 Public Pottstown 5.7 in 0305 PM 02/07 Trained Spotter 3 ESE Sanatoga 5.5 in 0100 PM 02/07 Public Lower Frederick Twp 5.3 in 0412 PM 02/07 Trained Spotter New Hanover Twp 5.0 in 1200 PM 02/07 Public Oreland 5.0 in 1147 AM 02/07 Public 1 W Ambler 4.3 in 1130 AM 02/07 Trained Spotter Bala Cynwyd 4.0 in 0353 PM 02/07 Public King of Prussia 3.4 in 0301 PM 02/07 Trained Spotter 2 ENE Gilbertsville 2.8 in 0930 AM 02/07 Public Plymouth Meeting 2.7 in 0128 PM 02/07 Trained Spotter ...Northampton County... Forks Twp 4.6 in 0318 PM 02/07 Trained Spotter Hellertown 3.5 in 0415 PM 02/07 Trained Spotter Bethlehem 2.5 in 0228 PM 02/07 Trained Spotter Martins Creek 2.2 in 0200 PM 02/07 Trained Spotter ...Philadelphia County... Chestnut Hill 6.0 in 0230 PM 02/07 Public 1 SW Somerton 3.5 in 0224 PM 02/07 Fire Dept/Rescue Fox Chase 3.0 in 0330 PM 02/07 Trained Spotter Philadelphia International 1.7 in 0700 PM 02/07 ASOS &&
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