Pennsylvania, 1999

Heavy Snow in Pennsylvania, March 21, 1999

March 21, 1999 · NWS CTP · 2 events in 2 counties and zones

2 heavy snow, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

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 radar

The national radar mosaic for the moment the first event began.

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Event by event

2 heavy snow. Local standard time, as filed.

Heavy Snow, Northern Lycoming

When
March 21, 2:00 PM EST to 11:59 PM EST
Where
Northern Lycoming forecast zone
Reported by
EMERGENCY MANAGER
Coordinates
41.343, -77.064 (the zone’s center; the record gives no point)

A cold front tracked east across Pennsylvania merging with low pressure moving northeast from Virginia. A mix of rain and snow fell across the central mountains of Pennsylvania with heavy rains in the southeast. Highways across the higher elevations had numerous traffic accidents as roads iced up late Sunday afternoon and evening. Only the high elevations of Lycoming and Sullivan counties were cool enough to maintain most of the precipitation as snow. Areas northeast of Picture Rocks reported heavy snow with 11 inches at Crystal Lake and 6 inches near Huntersville. Laporte in Sullivan County had a total of 8 inches. As the systems merged, low pressure deepened quickly and moved northeast up the Hudson Valley, bringing gusty northwest winds and cool air into all of Pennsylvania behind the system on Monday.

Heavy Snow, Sullivan

When
March 21, 2:00 PM EST to 11:59 PM EST
Where
Sullivan forecast zone
Reported by
EMERGENCY MANAGER
Coordinates
41.446, -76.512 (the zone’s center; the record gives no point)

What these are

Heavy Snow
Snowfall reaching the local warning threshold without the other hazards of a winter storm.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Pennsylvania in 1999Every state in 1999This day in weather historyWarnings in Pennsylvania, March 1999

Sources

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 2026-10-01. Each event’s entry at NCEI: 5682805, 5682806.