States › Pennsylvania › 1999

Pennsylvania, 1999

The year's recorded storm events, federal disaster declarations and flood insurance claims.

1,539events recorded1,506 in 1998

101deaths recorded358 injuries

$116Mproperty damage (estimates)$521M crop damage

3disaster declarations2,581 NFIP claims, $63M paid

NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders.

Events by hazard

Wind573

Winter346

Drought205

Flood128

Heat72

Hail70

Other67

Fog45

Lightning24

Tornado9

Includes events recorded by forecast zone. The state's yearly total for 1999 was 1,539 against 1,506 in 1998.

Counties with the most recorded events

County	Events in 1999
Bucks County	55
Delaware County	55
Chester County	54
Philadelphia County	53
Montgomery County	52
Berks County	50
Northampton County	45
Carbon County	44
Monroe County	44
Lehigh County	43
York County	34
Crawford County	33
Allegheny County	29
Westmoreland County	28
Cambria County	24
Union County	24
Mercer County	23
Fayette County	22
Butler County	21
Northumberland County	21
Clearfield County	20
Dauphin County	20
Lawrence County	20
Lycoming County	20
Elk County	19

Notable events

Date	County	Event type	Magnitude	Property damage	Deaths	Injuries
4 Jul 1999	Philadelphia	Heat	—	—	58	124
4 Jul 1999	Delaware	Heat	—	—	7	—
1 Aug 1999	Philadelphia	Heat	—	—	5	—
4 Jul 1999	Chester	Heat	—	—	4	—
16 Sep 1999	Montgomery	Flash Flood	—	$12,000,000	3	8
23 Jul 1999	Philadelphia	Heat	—	—	3	—
4 Jul 1999	Bucks	Heat	—	—	2	6
2 Jan 1999	Allegheny	Winter Storm	—	—	2	1
7 Jun 1999	Montgomery	Heat	—	—	2	1
5 Jul 1999	Perry	Heat	—	—	2	—
16 Sep 1999	Delaware	Flash Flood	—	$15,000,000	1	14
4 Jul 1999	Montgomery	Heat	—	—	1	5
9 Jul 1999	Warren	Thunderstorm Wind	—	$150,000	1	2
16 Sep 1999	Chester	Flash Flood	—	$3,000,000	1	1
13 Aug 1999	Cambria	Thunderstorm Wind	—	$50,000	1	1
10 Jun 1999	Crawford	Thunderstorm Wind	—	$10,000	1	1
16 Sep 1999	Philadelphia	Flash Flood	—	$4,200,000	1	—
2 Jan 1999	Monroe	Winter Storm	—	—	1	—
8 Jan 1999	Lehigh	Winter Weather	—	—	1	—
4 Jul 1999	Lehigh	Heat	—	—	1	—
4 Jul 1999	Northampton	Heat	—	—	1	—
23 Jul 1999	Delaware	Heat	—	—	1	—
27 Jun 1999	Montgomery	Heat	—	—	1	—
13 Jan 1999	Philadelphia	Winter Weather	—	—	—	72
18 Jan 1999	Philadelphia	Tornado	F0	—	—	18
16 Sep 1999	Bucks	Flash Flood	—	$22,000,000	—	15
26 Nov 1999	Chester	Tornado	F1	$3,000,000	—	12
13 Jan 1999	Chester	Winter Storm	—	—	—	12
13 Jan 1999	Delaware	Winter Storm	—	—	—	12
13 Jan 1999	Monroe	Winter Storm	—	—	—	12
13 Jan 1999	Bucks	Winter Storm	—	—	—	12
2 Jan 1999	Crawford	Winter Storm	—	$30,000	—	5
2 Jan 1999	Forecast zone	Winter Storm	—	$30,000	—	5
2 Jan 1999	Forecast zone	Winter Storm	—	$30,000	—	4
20 Aug 1999	McKean	Flash Flood	—	$25,000,000	—	1
12 Feb 1999	Bucks	Thunderstorm Wind	58 mph	—	—	2
9 Mar 1999	Washington	Heavy Snow	—	—	—	2
10 Jun 1999	Crawford	Lightning	—	—	—	2
24 May 1999	Chester	Thunderstorm Wind	58 mph	—	—	2
2 Jun 1999	Armstrong	Thunderstorm Wind	98 mph	$250,000	—	1

Up to 40 events with deaths, injuries, damage of $50,000 or more, or a tornado rating, ranked by deaths, injuries and damage.

Federal disaster declarations in 1999

Declared	Number	Type	Incident	Title	Counties
22 Sep 1999	DR-1298	Major disaster	Flood	Tropical Depression Dennis Pa	5
18 Sep 1999	DR-1294	Major disaster	Hurricane	Hurricane Floyd Major Disaster Declarations	8
1 Sep 1999	DR-1289	Major disaster	Severe Storm	Pa - Flooding 8/20/99	2

Flood insurance claims with a 1999 date of loss

2,581 NFIP claims, 2,105 of them paid, for $63,365,555.

Sources: NOAA NCEI Storm Events through 30 Jun 2026; OpenFEMA DisasterDeclarationsSummaries v2 (1 Oct 2026); OpenFEMA NfipClaims v3 (8 Sep 2026). Built 1 Oct 2026.