Heavy Snow, Allegany
- When
- March 4, 11:53 PM EST
- Where
- Allegany forecast zone
- Property damage
- $100,000
- Reported by
- TRAINED SPOTTER
- Coordinates
- 42.257, -78.028 (the zone’s center; the record gives no point)
A complex low pressure system that plagued the Northeast brought significant snowfall to western and central New York. The snow in western New York came in two phases from Sunday night to early Monday morning (4th-5th) and again Monday night to Tuesday morning (5th-6th).
Every event with a place to put it; 12 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 BUF wrote it up.
A complex low pressure system that plagued the Northeast brought significant snowfall to western and central New York. The snow in western New York came in two phases from Sunday night to early Monday morning (4th-5th) and again Monday night to Tuesday morning (5th-6th). The heaviest snow fell during the first period and was associated with upper level energy, while the second snow period resulted from the western fringe of a large coastal storm south of New England. East of Lake Ontario, the snow was nearly continuous from late Monday night through Tuesday morning (4th-6th). Snowfall totals for the 48-hour event were generally between 12-18" from the Genesee Valley eastward and 8-12" across far western New York. Specific storm totals reported...Niagara county: 9" North Tonawanda and Niagara Falls and 7" Youngstown; Erie county: 12" Wales, 11" Colden; 10" Boston and Buffalo; 9" Orchard Park, Lancaster and Amherst, and 8" Tonawanda, Alden and Grand Island; Orleans county: 11" Medina and 10" Lyndonville; Genesee county: 10" Pavilion and 9" Batavia; Wyoming county: 13" Portageville, 10" Warsaw, and 9" Bennington; Chautauqua county: 14" Sherman, 12" Frewsburg and Sinclairville, 10" Jamestown and 7" Silver Creek; Cattaraugus county: 14" Perrysburg, 13" Olean and Salamanca; 12" Franklinville and Little Valley, and 9" New Albion; Allegany county: 15" Angelica and Friendship, 14" Alfred, 12" Wellsville and Whitesville; Monroe county: 19" Mendon; 17" Greece, 16" Webster, 15" Honeoye Falls, 14" Penfield and Perinton and 10" Rochester; Livingston county: 19" Conesus, 16" Mount Morris, 14" Nunda and Dansville, 11" Avon; Ontario county: 13" Honeoye Lake and 12" Geneva; Wayne county: 21" Sodus, 14" Ontario, and 13" Newark and Palmyra; Cayuga county: 18" Fair Haven; Oswego county: 19" West Monroe; 16" Fulton, and 15" Oswego; Jefferson county: 9" Adams, and 8" Chaumont and Watertown; and Lewis county: 16" Castorland, 12" Lowville, 11" North Osceola, 9" and Highmarket.
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 Buffalo, NY wrote its last area forecast discussion before the first event at Mar 4, 9:15 PM EST, 2 hours 38 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BUFFALO NY
915 PM EST SUN MAR 4 2001
WILL UPDATE SEVERAL ZONES TO UP OVERNIGHT SNOWFALL TOTALS...
SNOW STREAMED NNE ACROSS MOST OF WRN NY THIS AFTERNOON AND CONTINUES
THIS EVENING...WITH HEAVIER ACTIVITY ALONG INVERTED TROF AND 700 MB
BOUNDARY EXTENDING FROM WRN PA TO ALLEG CO TO GENESEE VALLEY. ALREADY
REPORTS OF 3 TO 5 INCHES FROM SRN LIVINGSTON AND ALLEG COS. ROC AREA
HAS 2 TO 3 AS OF 9 PM...BUF AROUND 1 INCH. LATEST SPC DISC HIGHLITES
CNTRL SRN TIER NEXT FEW HOURS BUT RADAR STILL INDICATES HEAVIER SNOW
LIFTING NORTHWARD ACROSS WRN SRN TIER AND WILL MOVE ACROSS ALL OF WRN
NY TILL ABOUT 07 OR 08Z. INVERTED TROF HANGS ACROSS AREA TILL MON AM
SO AM CONCERNED THAT EVEN THESE REVISED AMOUNTS MAY STILL BE A BIT
LOW.
WLL THEREFORE UP OVERNIGHT AMOUNTS TO 6-10 RANGE ALLEG/CATT COS AND
4-8 FROM WYO CO NE ACROSS FINGER LAKES TO ROC AREA. WILL EDGE OSW CO
UP TO 2-4 AND JEFF/LEWIS TO 1-3. WILL HOLD ONTO 2-4 FAR WEST.
WILL MAKE NO CHANGES TO FUTURE PERIODS AT THIS TIME. IT DOES APPEAR
THAT TONIGHT WILL FEATURE HEAVIEST SNOWS FOR FAR WEST...AND MON NT
FOR EASTERN ZONES...BUT WARNINGS WILL BE CONTINUED THROUGH MON NT.
WLL INCLUDE TONIGHT IN ERN ZONES IN WRNG UPDATE.
ZONES WILL BE REARRANGED TO REFLECT NEW TOTALS WITH HEADERS NOTING
TOTAL STORM ACCUMS.
SEE LATEST BUFPNSBUF FOR UPDATED SNOWFALL TOTALS.
THAT SIT FROM THE SNOWY BUF. NEW ZONES BY 930.
TAKE IT EASY.
.BUF...WINTER STORM WARNING TONIGHT THROUGH MONDAY NIGHT
ALL ZONES. NYZ001>008-010>014-019>021
MCLAUGHLINThe national radar mosaic for the moment the first event began.
12 heavy snow. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2001Every state in 2001This day in weather historyWarnings in New York, March 2001
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: 5235843, 5235844, 5235845, 5235846, 5235847, 5235848, 5235849, 5235850, 5235851, 5235852, 5235853, 5235854.