Pennsylvania, 1999

Damaging Winds in Pennsylvania, July 9, 1999

July 9, 1999 · NWS BGM · 6 events in 6 counties and zones

A squall line with embedded bow echoes developed along a cold front approaching from the northwest. The line of severe thunderstorms maintained its intensity as it raced out ahead of the front moving across much of Northeast Pennnsylvania during the evening hours.

Where it happened

Every event with a place to put it. 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
$20,000
Crop damage
None recorded
Events
6

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 BGM wrote it up.

A squall line with embedded bow echoes developed along a cold front approaching from the northwest. The line of severe thunderstorms maintained its intensity as it raced out ahead of the front moving across much of Northeast Pennnsylvania during the evening hours. The strong thunderstorm winds uprooted trees and caused power outages.

The radar

The Binghamton radar (KBGM), 63 km away, was scanning. The volume nearest the first event began at 01:36 UTC.

Open the radar archive at this moment

Event by event

6 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Bradford

When
July 9, 8:37 PM EST
Where
Bradford County, Countywide
Measured
50 kt (58 mph)
Reported by
BROADCAST MEDIA
Coordinates
41.780, -76.500

Trees downed.

Thunderstorm Wind, Luzerne

When
July 9, 9:55 PM EST
Where
Luzerne County, Harveys Lake
Measured
50 kt (58 mph)
Reported by
TRAINED SPOTTER
Coordinates
41.380, -76.030

Large limbs were knocked down by the wind.

Thunderstorm Wind, Susquehanna

When
July 9, 10:15 PM EST
Where
Susquehanna County, New Milford
Measured
50 kt (58 mph)
Reported by
EMERGENCY MANAGER
Coordinates
41.880, -75.730

Several trees blown down.

Thunderstorm Wind, Lackawanna

When
July 9, 10:17 PM EST to 10:35 PM EST
Where
Lackawanna County, Newton to Taylor
Property damage
$10,000
Reported by
EMERGENCY MANAGER
Coordinates
41.450, -75.800

Scattered trees and a few wires blown down.

Thunderstorm Wind, Wayne

When
July 9, 10:55 PM EST
Where
Wayne County, Lake Ariel to Hamlin
Measured
50 kt (58 mph)
Reported by
TRAINED SPOTTER
Coordinates
41.450, -75.380

Trees downed.

Thunderstorm Wind, Pike

When
July 9, 11:00 PM EST
Where
Pike County, Dingmans Ferry
Property damage
$10,000
Reported by
TRAINED SPOTTER
Coordinates
41.220, -74.880

Several trees and powerlines blown down.

What these are

Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

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, July 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: 5713135, 5713137, 5713136, 5713138, 5713139, 5713140.