Pennsylvania, 1998

Heat in Pennsylvania, January 31, 1998

January 31, 1998 · NWS PHI · 10 events in 10 counties and zones

Courtesy of the warm spell at the start of the month and the lack of any prolonged invasions of arctic air the rest of the month, January 1998 was one of the ten warmest Januarys on record for Eastern Pennsylvania. 6 degrees above normal and was tied for the 8th warmest January on record.

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.

  • 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
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.

Courtesy of the warm spell at the start of the month and the lack of any prolonged invasions of arctic air the rest of the month, January 1998 was one of the ten warmest Januarys on record for Eastern Pennsylvania. At the Philadelphia International Airport, the January monthly mean temperature of 41.0 degrees was 10.6 degrees above normal and was tied for the 8th warmest January on record. At the Lehigh Valley International Airport, the monthly mean temperature of 36.5 degrees was 9.9 degrees above normal and was the 5th warmest January on record.

The radar

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

Open the radar archive at this moment

Event by event

10 heat. Local standard time, as filed.

Heat, Berks

When
January 31, 11:59 PM EST
Where
Berks forecast zone
Coordinates
40.416, -75.926 (the zone’s center; the record gives no point)

Heat, Bucks

When
January 31, 11:59 PM EST
Where
Bucks forecast zone

Heat, Carbon

When
January 31, 11:59 PM EST
Where
Carbon forecast zone
Coordinates
40.918, -75.709 (the zone’s center; the record gives no point)

Heat, Chester

When
January 31, 11:59 PM EST
Where
Chester forecast zone

Heat, Delaware

When
January 31, 11:59 PM EST
Where
Delaware forecast zone
Coordinates
39.917, -75.399 (the zone’s center; the record gives no point)

Heat, Lehigh

When
January 31, 11:59 PM EST
Where
Lehigh forecast zone
Coordinates
40.613, -75.592 (the zone’s center; the record gives no point)

Heat, Monroe

When
January 31, 11:59 PM EST
Where
Monroe forecast zone
Coordinates
41.058, -75.339 (the zone’s center; the record gives no point)

Heat, Montgomery

When
January 31, 11:59 PM EST
Where
Montgomery forecast zone

Heat, Northampton

When
January 31, 11:59 PM EST
Where
Northampton forecast zone
Coordinates
40.754, -75.307 (the zone’s center; the record gives no point)

Heat, Philadelphia

When
January 31, 11:59 PM EST
Where
Philadelphia forecast zone
Coordinates
40.008, -75.134 (the zone’s center; the record gives no point)

What these are

Heat
Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.

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

The same day elsewhere

More

Every storm in Pennsylvania in 1998Every state in 1998This day in weather historyWarnings in Pennsylvania, January 1998

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: 5630626, 5630627, 5630628, 5630629, 5630630, 5630631, 5630632, 5630633, 5630634, 5630635.