Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 67, NWS Philadelphia/Mount Holly

July 1, 2001Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2001, 1:26 PM EDT for Berks County, Pennsylvania. It was in force for 64 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 1, 2001, 1:26 PM EDT (17:26 UTC)
Expired: Jul 1, 2001, 2:30 PM EDT
In force: 64 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 17:27 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.

What was reported inside it

Time	Report	Where	Remark
Jul 1, 1:35 PM EDT	Thunderstorm Wind 50 E	Hamburg, PA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 1, 12:00 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.4 hours before the alert went out and 206 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: 737 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1231 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 011726
SVRPHI

PAC011-011830-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
126 PM EDT SUN JUL 1 2001

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BERKS COUNTY IN EASTERN PENNSYLVANIA.

* UNTIL 230 PM EDT.

* AT 122 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM... 2 MILES NORTH OF STRAUSSTOWN...MOVING EAST
  AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HAMBURG AT 140 PM.
  LEESPORT AT 145 PM.
  FLEETWOOD AT 200 PM.
  KUTZTOWN AT 205 PM.

DAMAGING WINDS IN EXCESS OF 55 MPH ARE EXPECTED FROM THIS STORM. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED.

FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE
TELEVISION OUTLET.

A SEVERE THUNDERSTORM WATCH REM)AINS IN EFFECT UNTIL 600 PM SUNDAY
EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.

$$

LAT...LON 4063 7625 4046 7627 4035 7565 4051 7559

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 10:53 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	52 min
Jul 1, 1:09 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	36 min
Jul 1, 1:20 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	25 min
Jul 1, 2:03 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	42 min
Jul 1, 2:44 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Northampton	61 min
Jul 1, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	39 min
Jul 1, 4:35 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Montgomery	40 min
Jul 1, 5:15 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	45 min
Jul 1, 5:15 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	45 min
Jul 1, 6:31 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	29 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2001 Every severe thunderstorm warning in 2001

Sources

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