Pennsylvania, 2006

Heat in Pennsylvania, July 18, 2006

July 18, 2006 · NWS CTP · 6 events in 6 counties and zones

Unseasonably hot and humid weather settled over Pennsylvania during the middle of July. On July 18th, air temperatures reached the middle 90s and combined with dewpoints in the lower 70s, produced heat index values of 96 to 101.

Where it happened

Every event with a place to put it; 6 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

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
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 CTP wrote it up.

Unseasonably hot and humid weather settled over Pennsylvania during the middle of July. On July 18th, air temperatures reached the middle 90s and combined with dewpoints in the lower 70s, produced heat index values of 96 to 101. There were no reported injuries or deaths associated with the heat.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before the first event at Jul 18, 11:44 AM EST, 16 minutes earlier.

Area forecast discussion, Jul 18, 11:44 AM EST, 16 minutes before
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Hazardous weather outlook, Jul 18, 4:49 AM EST, 7 hours 11 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
549 AM EDT TUE JUL 18 2006

PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-
049>053-056>059-063>066-191000-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-
NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-
JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-TIOGA-NORTHERN LYCOMING-
SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-
NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-
CUMBERLAND-ADAMS-YORK-LANCASTER-
549 AM EDT TUE JUL 18 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
PENNSYLVANIA.

.DAY ONE...TODAY AND TONIGHT

A HEAT ADVISORY IS IN EFFECT FROM 1 PM TO 6 PM EDT FOR THE
LOWER SUSQUEHANNA VALLEY...WHERE THE COMBINATION OF TEMPERATURES
IN THE MID 90S WITH DEWPOINTS IN THE LOWER 70S WILL PRODUCE A HEAT
INDEX BETWEEN 100 AND 104 DEGREES.

A COLD FRONT OVER THE LOWER GREAT LAKES THIS MORNING WILL MOVE
SOUTHEAST AND INTERACT WITH THE HOT AND HUMID AIRMASS TO PRODUCE
SCATTERED STRONG TO SEVERE THUNDERSTORMS. LOCALIZED DAMAGING WIND
GUSTS AROUND 60 MPH AND LARGE HAIL ARE POSSIBLE.

IN ADDITION FREQUENT...DANGEROUS LIGHTNING AND LOCALLY HEAVY
RAINFALL OF ONE INCH IN LESS THAN AN HOUR WILL ACCOMPANY SOME OF
THE STORMS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SCATTERED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS THE
NORTHWEST HALF OF PENNSYLVANIA THURSDAY AFTERNOON AND EVENING...IN
ADVANCE OF ANOTHER COLD FRONT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON.

LAMBERT

In the hours before

Special weather statement, Jul 18, 10:23 AM EST, 1 hour 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1123 AM EDT TUE JUL 18 2006

PAZ012-017>019-024>028-033>036-041-042-045-046-049>053-056>059-
063>066-190200-
NORTHERN CLINTON-CLEARFIELD-NORTHERN CENTRE-SOUTHERN CENTRE-
CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-SOMERSET-BEDFORD-FULTON-
FRANKLIN-NORTHERN LYCOMING-SULLIVAN-SOUTHERN CLINTON-
SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA-
PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER-
1123 AM EDT TUE JUL 18 2006

...SCATTERED SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND
EARLY THIS EVENING...

A COLD FRONT WILL CONTINUE TO PUSH THROUGH THE STATE FROM NORTH
TO SOUTH THIS AFTERNOON AND EVENING. VERY HOT AND HUMID AIR
ACROSS THE REGION WILL INTERACT WITH THIS FRONT TO PRODUCE
SCATTERED SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING.

LOCALIZED DAMAGING WIND GUSTS AND LARGE HAIL WILL OCCUR WITH SOME
OF THE THUNDERSTORMS.

FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING WILL BE COMMON NEAR
THE STORMS. RAINFALL AMOUNTS OF ONE INCH IN JUST 30 MINUTES COULD
ALSO OCCUR WITH A FEW OF THE THUNDERSTORMS.

DURING SEVERE WEATHER...SEEK SHELTER INSIDE YOUR HOME OR A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

DANGELO

The radar

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

Open the radar archive at this moment

Event by event

6 heat. Local standard time, as filed.

Heat, Adams

When
July 18, 12:00 PM EST to 5:00 PM EST
Where
Adams forecast zone
Reported by
OFFICIAL NWS OBS.
Coordinates
39.872, -77.218 (the zone’s center; the record gives no point)

Heat, Cumberland

When
July 18, 12:00 PM EST to 5:00 PM EST
Where
Cumberland forecast zone
Reported by
OFFICIAL NWS OBS.
Coordinates
40.164, -77.266 (the zone’s center; the record gives no point)

Heat, Dauphin

When
July 18, 12:00 PM EST to 5:00 PM EST
Where
Dauphin forecast zone
Reported by
OFFICIAL NWS OBS.
Coordinates
40.415, -76.779 (the zone’s center; the record gives no point)

Heat, Lancaster

When
July 18, 12:00 PM EST to 5:00 PM EST
Where
Lancaster forecast zone
Reported by
OFFICIAL NWS OBS.
Coordinates
40.042, -76.248 (the zone’s center; the record gives no point)

Heat, Lebanon

When
July 18, 12:00 PM EST to 5:00 PM EST
Where
Lebanon forecast zone
Reported by
OFFICIAL NWS OBS.
Coordinates
40.367, -76.458 (the zone’s center; the record gives no point)

Heat, York

When
July 18, 12:00 PM EST to 5:00 PM EST
Where
York forecast zone
Reported by
OFFICIAL NWS OBS.
Coordinates
39.920, -76.726 (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 2006Every state in 2006This day in weather historyWarnings in Pennsylvania, July 2006

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: 5527207, 5527208, 5527209, 5527210, 5527211, 5527212.