SEVERE WX : Lake Effect Snow Warning - Winter Weather Advisory View Alerts

Risk for flooding due to rain and snow melt

The combination of rain and snow melt on Christmas Eve and Christmas Day could be enough to cause flooding in parts of Central New York.

Posted: Dec 23, 2020 4:03 PM

New data is in and it's looking even wetter for Christmas Eve and Christmas day. The totals are up to near 2" for most of our area. This would be enough to cause flooding in poor drainage areas and small streams and creeks.

Low pressure working in from the west will bring very mild conditions to the area on Christmas Eve. Temperatures are expected to climb into the low 40s for most of the day, with a breezy southeasterly wind. Rain showers develop tomorrow afternoon and become widespread and heavy as the day progresses. Temperatures will become warmest Chirstmas Eve night, in the 50s! The combination of warm temperatures, wind, and high humidity is expected to melt a significant amount of snow in the region.

A strong cold front arrives Christmas morning. The front will arrive early, accomapnied by gusty winds, heavy rain, and a sharp drop in temperature. The good news is that a flash freeze is less likely to happen now that the front is delayed to the morning. Temperatures are expected to drop from 50s to 30s during the day, meaning most areas will stay just above freezing. Scattered Christmas Day snow showers are expected, with a light accumulation.

The wildcard is snow melt. It's difficult to predict exactly how much snow will melt during a 24 hour warmup. It's even more difficult to predict the rate of melt and the rate at which it moves into streams and rivers. This will ultimately determine the extent of flooding for streams, creeks, and rivers. Bottom line, if you live in a flood prone area be on alert Christmas Day.

New York Coronavirus Cases

County data is updated nightly.

Cases: 1279811

Reported Deaths: 41587
CountyCasesDeaths
Queens1600187889
Kings1568738092
Suffolk1298042624
Nassau1160652581
Bronx1069555302
Westchester857231819
New York765463456
Erie524731390
Richmond455161388
Monroe44631780
Rockland32137817
Orange29078656
Onondaga27948535
Oneida16976352
Dutchess16963322
Albany16521260
Niagara12229248
Broome11255260
Saratoga937583
Schenectady8770128
Ulster7822196
Rensselaer6965106
Putnam657675
Chautauqua566064
Chemung5643108
Oswego496169
Ontario477082
Steuben4632131
Cayuga447471
Sullivan388749
Wayne372254
Genesee3689100
St. Lawrence368563
Herkimer368259
Cattaraugus342761
Jefferson327224
Madison317376
Livingston273742
Tompkins270724
Cortland266854
Columbia252472
Allegany237575
Montgomery226575
Tioga222854
Wyoming221244
Clinton220918
Fulton214053
Warren211942
Greene207860
Orleans194569
Chenango179544
Otsego173823
Washington154224
Lewis154024
Seneca123946
Franklin11649
Delaware102923
Essex98819
Schoharie9145
Yates83519
Schuyler72410
Hamilton1471
Unassigned53122
Out of NY0166
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