Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 106, NWS Philadelphia/Mount Holly

August 24, 1996Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 24, 1996, 1:03 AM EDT for Chester County, Pennsylvania. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 24, 1996, 1:03 AM EDT (05:03 UTC)
Expired: Aug 24, 1996, 2:00 AM EDT
In force: 57 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

County Chester County, PA

The radar

The Philadelphia radar (KDIX), 114 km from the middle of the area, began a volume at 05:04 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 5.1 hours before the alert went out and 182 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1667 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1344 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 23, 8:12 PM EDT, 4 hours 51 minutes before

PAZ054-055-240100

SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH CANCELLATION..
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
815 PM EDT FRI AUG 23 1996

...A SEVERE THUNDERSTORM WATCH IS NO LONGER IN EFFECT FOR EASTERN
   PENNSYLVANIA INCLUDING THE COUNTIES OF CARBON AND MONROE...

THE NATIONAL WEATHER SERVICE HAS CANCELLED THE SEVERE THUNDERSTORM
PORTION OF EASTERN PENNSYLVANIA TO INCLUDE CARBON AND MONROE COUNTIES.

THUNDERSTORMS ARE STILL EXPECTED TONIGHT...HOWEVER...THE THREAT
OF SEVERE THUNDERSTORMS IS NO LONGER AS STRONG.

ALL THUNDERSTORMS CAN AND DO PRODUCE DEADLY LIGHTNING STRIKES THAT KILL.
ONE PERSON IN SUSSEX COUNTY NEW JERSEY NEAR THE TOWN OF ANDOVER WAS
STRUCK BY LIGHTNING AROUND 730 PM EDT.

THUNDERSTORMS ARE EXPECTED TO CONTINUE MOVING SOUTHEAST ACROSS EASTERN
PENNSYLVANIA AND NEW JERSEY TONIGHT.

MHOON

Local storm report, Aug 23, 8:32 PM EDT, 4 hours 31 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE PHILADELPHIA, PA
831 PM EDT FRI AUG 23 1996

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0727 PM    ANDOVER                   NJ
08/23/96   SUSSEX                         *** 1 INJ ***
                                          MAN STRUCK BY LIGHTNING AT
                                          HOME DRIVEWAY WHILE
                                          WORKING ON AUTO. HE WAS
                                          KNOCKED TO GROUND AND
                                          RECEIVED LEG BURNS. REPORT
                                          BY LAKE LAND EMERGENCY SQUAD

MHOON

Local storm report, Aug 23, 8:36 PM EDT, 4 hours 27 minutes before

STORM REPORT CORRECTED
NATIONAL WEATHER SERVICE PHILADELPHIA, PA
834 PM EDT FRI AUG 23 1996

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0727 PM    ANDOVER                   NJ
08/23/96   SUSSEX                         *** 1 INJ ***
                                          MAN STRUCK BY LIGHTNING AT
                                          HOME DRIVEWAY WHILE
                                          WORKING ON AUTO. HE WAS
                                          KNOCKED TO GROUND AND
                                          RECEIVED LEG BURNS. REPORT
                                          BY LAKE LAND EMERGENCY SQUAD

730 PM0     SPARTA                    NJ
08/23/96   SUSSEX                         *** DAMAGE ***
                                          HOME AND TREE STRUCK BY LIGHTNING

MHOON

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 11:12 PM EDT	Severe Thunderstorm Warning	PHI	Berks	33 min
Aug 23, 11:15 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	60 min
Aug 23, 11:19 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	56 min
Aug 23, 11:28 PM EDT	Flash Flood Warning	PHI	Bucks	2 hr
Aug 23, 11:28 PM EDT	Flash Flood Warning	PHI	Chester	2 hr
Aug 24, 1:03 AM EDT	Flash Flood Warning	PHI	Chester	57 min
Aug 24, 2:20 AM EDT	Flash Flood Warning	PHI	Philadelphia	115 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1996 Every severe thunderstorm warning in 1996

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.