Pennsylvania, 1999

Strong Wind in Pennsylvania, March 4, 1999

March 4, 1999 · NWS PHI · 10 events in 10 counties and zones

The circulation around an intensifying low pressure that moved through New York State and northern New England during the day on the 4th produced wind gusts of around 45 mph the early morning and throughout the day in Eastern Pennsylvania. The winds knocked down a tree in Upper Darby (Delaware County) and it damaged a vehicle.

Where it happened

Every event with a place to put it; 7 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
10

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.

What happened

The episode as NWS PHI wrote it up.

The circulation around an intensifying low pressure that moved through New York State and northern New England during the day on the 4th produced wind gusts of around 45 mph the early morning and throughout the day in Eastern Pennsylvania. The winds knocked down a tree in Upper Darby (Delaware County) and it damaged a vehicle. The winds also contributed in downing wires in Hilltown (Bucks County). About 1,700 Pennsylvania Power and Light customers lost power for 90 minutes. Peak wind gusts included 47 mph in Tobyhanna (Monroe County), 46 mph at the Philadelphia International Airport, 41 mph in Reading (Berks County) and 39 mph at the Lehigh Valley International Airport.

The radar

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

Open the radar archive at this moment

Event by event

10 strong wind. Local standard time, as filed.

Strong Wind, Berks

When
March 4, 4:00 AM EST to 6:00 PM EST
Where
Berks forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.416, -75.926 (the zone’s center; the record gives no point)

Strong Wind, Bucks

When
March 4, 4:00 AM EST to 6:00 PM EST
Where
Bucks forecast zone
Reported by
AWOS,ASOS,MESONET,ETC

Strong Wind, Carbon

When
March 4, 4:00 AM EST to 6:00 PM EST
Where
Carbon forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.918, -75.709 (the zone’s center; the record gives no point)

Strong Wind, Chester

When
March 4, 4:00 AM EST to 6:00 PM EST
Where
Chester forecast zone
Reported by
AWOS,ASOS,MESONET,ETC

Strong Wind, Delaware

When
March 4, 4:00 AM EST to 6:00 PM EST
Where
Delaware forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
39.917, -75.399 (the zone’s center; the record gives no point)

Strong Wind, Lehigh

When
March 4, 4:00 AM EST to 6:00 PM EST
Where
Lehigh forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.613, -75.592 (the zone’s center; the record gives no point)

Strong Wind, Monroe

When
March 4, 4:00 AM EST to 6:00 PM EST
Where
Monroe forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
41.058, -75.339 (the zone’s center; the record gives no point)

Strong Wind, Montgomery

When
March 4, 4:00 AM EST to 6:00 PM EST
Where
Montgomery forecast zone
Reported by
AWOS,ASOS,MESONET,ETC

Strong Wind, Northampton

When
March 4, 4:00 AM EST to 6:00 PM EST
Where
Northampton forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.754, -75.307 (the zone’s center; the record gives no point)

Strong Wind, Philadelphia

When
March 4, 4:00 AM EST to 6:00 PM EST
Where
Philadelphia forecast zone
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
40.008, -75.134 (the zone’s center; the record gives no point)

What these are

Strong Wind
Non-thunderstorm winds below high wind criteria that nonetheless caused damage or casualties.

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 2026-09-24. Each event’s entry at NCEI: 5691586, 5691587, 5691588, 5691589, 5691590, 5691591, 5691592, 5691593, 5691594, 5691595.