Alert archive / New Jersey / Excessive Heat Watches in 2012

Excessive Heat Watch 3, NWS Philadelphia/Mount Holly

June 26, 2012Delaware County, Philadelphia County, Pennsylvania; 4 counties in New Jersey; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this excessive heat watch at Jun 26, 2012, 3:42 PM EDT for Delaware County, Philadelphia County, Pennsylvania; 4 counties in New Jersey; New Castle County, Delaware. It took effect at Jun 29, 2012, 12:00 PM EDT. It was in force for .

The area

The counties it named.

The facts

Issued
Jun 26, 2012, 3:42 PM EDT (19:42 UTC)
In effect from
Jun 29, 2012, 12:00 PM EDT
Expired
Jun 28, 2012, 3:59 AM EDT
In force
Issued by
NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Mercer County, NJ, Delaware County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 59 km from the middle of the area, began a volume at 19:46 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.7 hours before the alert went out and 98 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Phillips Aaf/Abe, MD at 12:00Z on 2012-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2012-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1423 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

061 
WWUS71 KPHI 261942
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
342 PM EDT TUE JUN 26 2012

...A PERIOD OF EXCESSIVE HEAT LOOKS TO ARRIVE LATER THIS WEEK...

.HIGH PRESSURE, SLIDING EASTWARD FROM THE PLAINS TOWARD THE OHIO
VALLEY LATE THIS WEEK AND OVER THE WEEKEND, WILL PUSH A HOT AND
HUMID AIRMASS INTO THE MID ATLANTIC REGION. THIS HOT AND
INCREASINGLY HUMID AIRMASS IS ANTICIPATED TO MOVE INTO OUR AREA
FRIDAY AND LASTING THROUGH THE WEEKEND, WITH HEAT INDICES TOPPING OUT
TO AROUND 100 DEGREES. MEANWHILE, A FRONTAL BOUNDARY MAY STALL IN
OUR VICINITY OVER THE WEEKEND WHICH COULD RESULT IN SOME ISOLATED
BUT BRIEF COOLING THUNDERSTORMS. BASED ON ENOUGH CONFIDENCE, AN
EXCESSIVE HEAT WATCH HAS BEEN ISSUED.

DEZ001-NJZ015-017>019-PAZ067>071-270830-
/O.NEW.KPHI.EH.A.0003.120629T1600Z-120702T0000Z/
NEW CASTLE-MERCER-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...WILMINGTON...TRENTON...GLASSBORO...
CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY...WEST CHESTER...
NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA
342 PM EDT TUE JUN 26 2012

...EXCESSIVE HEAT WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
SUNDAY EVENING...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED AN
EXCESSIVE HEAT WATCH, WHICH IS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH SUNDAY EVENING.

* HEAT INDEX VALUES...AROUND 100 DEGREES DURING EACH AFTERNOON OF
  FRIDAY, SATURDAY AND SUNDAY. THERE IS A CHANCE THAT THE DEW
  POINTS MAY LOWER SOME ESPECIALLY FRIDAY, ALLOWING THE HEAT INDEX
  VALUES TO BE REDUCED.

* TEMPERATURES...HIGHS EACH AFTERNOON OF FRIDAY, SATURDAY AND
  SUNDAY IN THE MID TO UPPER 90S.

* IMPACTS...THE WORST WOULD BE FELT BY THOSE WHO LIVE AND/OR WORK
  IN THE URBAN AREAS. THOSE WHO ARE AT A GREATER RISK INCLUDE THE
  ELDERLY, THE INFIRM, CHILDREN AND ANYONE WITHOUT AIR
  CONDITIONING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AN EXCESSIVE HEAT WATCH MEANS THAT A PROLONGED PERIOD OF HOT
TEMPERATURES IS EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND
HIGH HUMIDITY WILL COMBINE TO CREATE A DANGEROUS SITUATION IN
WHICH HEAT ILLNESSES ARE POSSIBLE. DRINK PLENTY OF FLUIDS, STAY IN
AN AIR-CONDITIONED ROOM, STAY OUT OF THE SUN, AND CHECK UP ON
RELATIVES AND NEIGHBORS.

&&

$$

GORSE
3 follow-up statements
125 
WWUS71 KPHI 270729
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
329 AM EDT WED JUN 27 2012

...A PERIOD OF EXCESSIVE HEAT LOOKS TO ARRIVE LATER THIS WEEK...

.HIGH PRESSURE... SLIDING EASTWARD FROM THE PLAINS TOWARD THE
OHIO VALLEY LATE THIS WEEK AND OVER THE WEEKEND... WILL PUSH A
HOT AND HUMID AIRMASS INTO THE MID ATLANTIC REGION. THIS HOT AND
INCREASINGLY HUMID AIRMASS IS ANTICIPATED TO MOVE INTO OUR AREA
FRIDAY AND LASTING THROUGH THE WEEKEND... WITH HEAT INDICES
TOPPING OUT TO AROUND 100 DEGREES. MEANWHILE... A FRONTAL
BOUNDARY MAY STALL IN OUR VICINITY OVER THE WEEKEND WHICH COULD
RESULT IN SOME ISOLATED BUT BRIEF COOLING THUNDERSTORMS. BASED ON
ENOUGH CONFIDENCE... AN EXCESSIVE HEAT WATCH HAS BEEN ISSUED.

DEZ001-NJZ015-017>019-PAZ067>071-272000-
/O.CON.KPHI.EH.A.0003.120629T1600Z-120702T0000Z/
NEW CASTLE-MERCER-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...WILMINGTON...TRENTON...GLASSBORO...
CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY...WEST CHESTER...
NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA
329 AM EDT WED JUN 27 2012

...EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH SUNDAY EVENING...

* HEAT INDEX VALUES...AROUND 100 DEGREES DURING EACH AFTERNOON 
  OF FRIDAY... SATURDAY AND SUNDAY. THERE IS A CHANCE THAT THE 
  DEW POINTS MAY LOWER SOME ESPECIALLY FRIDAY... ALLOWING THE 
  HEAT INDEX VALUES TO BE REDUCED. 

* TEMPERATURES...HIGHS EACH AFTERNOON OF FRIDAY... SATURDAY AND 
  SUNDAY IN THE MID TO UPPER 90S. 

* IMPACTS...THE WORST WOULD BE FELT BY THOSE WHO LIVE AND/OR 
  WORK IN THE URBAN AREAS. THOSE WHO ARE AT A GREATER RISK 
  INCLUDE THE ELDERLY... THE INFIRM... CHILDREN AND ANYONE 
  WITHOUT AIR CONDITIONING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AN EXCESSIVE HEAT WATCH MEANS THAT A PROLONGED PERIOD OF HOT
TEMPERATURES IS EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND
HIGH HUMIDITY WILL COMBINE TO CREATE A DANGEROUS SITUATION IN
WHICH HEAT ILLNESSES ARE POSSIBLE. DRINK PLENTY OF FLUIDS... STAY
IN AN AIR-CONDITIONED ROOM... STAY OUT OF THE SUN... AND CHECK UP
ON RELATIVES AND NEIGHBORS.

&&

$$
260 
WWUS71 KPHI 271934
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
334 PM EDT WED JUN 27 2012

...A PERIOD OF EXCESSIVE HEAT FRIDAY THROUGH SUNDAY...

.HIGH PRESSURE, SLIDING EASTWARD FROM THE PLAINS TOWARD THE OHIO
VALLEY THURSDAY AND FRIDAY, WILL PUSH A HOT AND HUMID AIRMASS
INTO THE MID ATLANTIC REGION. IT WILL START TO TURN HOT THURSDAY,
HOWEVER THE HUMIDITY IS EXPECTED TO REMAIN ON THE LOWER SIDE. 
THE HEAT ALONG WITH AN INCREASINGLY HUMID AIRMASS IS ANTICIPATED
TO MOVE INTO OUR AREA FRIDAY AND LAST THROUGH THE WEEKEND.
MEANWHILE, A WEAK FRONTAL BOUNDARY WILL ARRIVE FRIDAY INTO
SATURDAY AND STALL NEAR THE NORTHERN MID ATLANTIC THROUGH SUNDAY,
AND THERE IS A CHANCE FOR SOME COOLING BUT BRIEF THUNDERSTORMS.
BASED ON THE FORECAST HEAT INDICES TO REACH 100 DEGREES, THE
EXCESSIVE HEAT WATCH CONTINUES.

THE HEAT WAVE LOOKS TO CONTINUE EARLY NEXT WEEK, HOWEVER THE
EXCESSIVE HEAT MAY BE PUSHED TO OUR SOUTH FOR A TIME.

DEZ001-NJZ015-017>019-PAZ067>071-280830-
/O.CON.KPHI.EH.A.0003.120629T1600Z-120702T0000Z/
NEW CASTLE-MERCER-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...WILMINGTON...TRENTON...GLASSBORO...
CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY...WEST CHESTER...
NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA
334 PM EDT WED JUN 27 2012

...EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH SUNDAY EVENING...

* HEAT INDEX VALUES...AROUND 100 DEGREES EACH AFTERNOON OF FRIDAY,
  SATURDAY AND SUNDAY. THERE IS THE POTENTIAL HOWEVER THAT THE DEW
  POINTS LOWER SOME DURING EACH AFTERNOON, WHICH WILL REDUCE THE
  HEAT INDEX VALUES AT LEAST SOME.

* TEMPERATURES...HIGHS EACH AFTERNOON OF FRIDAY, SATURDAY AND
  SUNDAY IN THE MID TO UPPER 90S. LOWS GENERALLY AROUND 70
  DEGREES, HOWEVER PROBABLY ONLY DROPPING TO NEAR 80 DEGREES IN
  CENTER CITY PHILADELPHIA.

* IMPACTS...THE WORST WOULD BE FELT BY THOSE WHO LIVE AND/OR WORK
  IN THE URBAN AREAS. THOSE WHO ARE AT A GREATER RISK INCLUDE THE
  ELDERLY, THE INFIRM, CHILDREN AND ANYONE WITHOUT AIR CONDITIONING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AN EXCESSIVE HEAT WATCH MEANS THAT A PROLONGED PERIOD OF HOT
TEMPERATURES IS EXPECTED. THE COMBINATION OF HOT TEMPERATURES AND
HIGH HUMIDITY WILL COMBINE TO CREATE A DANGEROUS SITUATION IN
WHICH HEAT ILLNESSES ARE POSSIBLE. DRINK PLENTY OF FLUIDS, STAY
IN AN AIR-CONDITIONED ROOM, STAY OUT OF THE SUN, AND CHECK UP ON
RELATIVES AND NEIGHBORS.

&&

$$

GORSE
592 
WWUS71 KPHI 280759
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
359 AM EDT THU JUN 28 2012

...A PERIOD OF EXCESSIVE HEAT FRIDAY THROUGH SUNDAY...

.HIGH PRESSURE... SLIDING EASTWARD FROM THE PLAINS TOWARD THE
OHIO VALLEY TODAY AND FRIDAY... WILL PUSH A HOT AND HUMID AIRMASS
INTO THE MID ATLANTIC REGION. IT WILL START TO TURN HOT TODAY...
HOWEVER THE HUMIDITY IS EXPECTED TO REMAIN ON THE LOWER SIDE. THE
HEAT ALONG WITH AN INCREASINGLY HUMID AIRMASS IS ANTICIPATED TO
MOVE INTO OUR AREA FRIDAY AND LAST THROUGH THE WEEKEND. THE HEAT
WAVE LOOKS TO CONTINUE EARLY NEXT WEEK... HOWEVER THE EXCESSIVE
HEAT MAY BE PUSHED TO OUR SOUTH FOR A TIME.

DEZ001-NJZ015-017>019-PAZ067>071-282000-
/O.UPG.KPHI.EH.A.0003.120629T1600Z-120702T0000Z/
/O.NEW.KPHI.EH.W.0003.120629T1600Z-120702T0000Z/
NEW CASTLE-MERCER-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...WILMINGTON...TRENTON...GLASSBORO...
CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY...WEST CHESTER...
NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA
359 AM EDT THU JUN 28 2012

...EXCESSIVE HEAT WARNING IN EFFECT FROM NOON FRIDAY TO 8 PM EDT
SUNDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED AN
EXCESSIVE HEAT WARNING...WHICH IS IN EFFECT FROM NOON FRIDAY TO
8 PM EDT SUNDAY. THE EXCESSIVE HEAT WATCH IS NO LONGER IN EFFECT.

* HEAT INDEX VALUES...AROUND 100 DEGREES EACH AFTERNOON OF
  FRIDAY... SATURDAY AND SUNDAY. THERE IS THE POTENTIAL HOWEVER
  THAT THE DEW POINTS LOWER SOME DURING EACH AFTERNOON... WHICH
  WILL REDUCE THE HEAT INDEX VALUES AT LEAST SOME.

* TEMPERATURES...HIGHS EACH AFTERNOON OF FRIDAY... SATURDAY AND 
  SUNDAY IN THE MID TO UPPER 90S. LOWS GENERALLY AROUND 70 
  DEGREES... HOWEVER PROBABLY ONLY DROPPING TO NEAR 80 DEGREES 
  IN CENTER CITY PHILADELPHIA. 

* IMPACTS...THE WORST WOULD BE FELT BY THOSE WHO LIVE AND/OR 
  WORK IN THE URBAN AREAS. THOSE WHO ARE AT A GREATER RISK 
  INCLUDE THE ELDERLY... THE INFIRM... CHILDREN AND ANYONE 
  WITHOUT AIR CONDITIONING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AN EXCESSIVE HEAT WARNING MEANS THAT A PROLONGED PERIOD OF
DANGEROUSLY HOT TEMPERATURES WILL OCCUR. THE COMBINATION OF HOT
TEMPERATURES AND HIGH HUMIDITY WILL CREATE A DANGEROUS SITUATION
IN WHICH HEAT ILLNESSES ARE LIKELY. DRINK PLENTY OF FLUIDS...STAY
IN AN AIR-CONDITIONED ROOM...STAY OUT OF THE SUN...AND CHECK UP
ON RELATIVES AND NEIGHBORS.

TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN
POSSIBLE...RESCHEDULE STRENUOUS ACTIVITY TO EARLY MORNING OR
EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT
STROKE. WEAR LIGHT WEIGHT AND LOOSE FITTING CLOTHING WHEN
POSSIBLE AND DRINK PLENTY OF WATER.

TO REDUCE RISK DURING OUTDOOR WORK...THE OCCUPATIONAL SAFETY AND
HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS
IN SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY
HEAT SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE
IS AN EMERGENCY - CALL 9 1 1.

&&

$$

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 25, 8:21 PM EDTSpecial Weather StatementPHIAtlantic54 min

Nearby

Excessive Heat Watches in New Jersey, 2012Excessive Heat Watches in Pennsylvania, 2012Excessive Heat Watches in Delaware, 2012Every excessive heat watch in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.