Alert archive / Maryland / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 34, NWS Philadelphia/Mount Holly

June 6, 2005Cecil County, Maryland; Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 6, 2005, 6:50 PM EDT for Cecil County, Maryland; Chester County, Pennsylvania. It was in force for 55 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 6, 2005, 6:50 PM EDT (22:50 UTC)
Expired: Jun 6, 2005, 7:45 PM EDT
In force: 55 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties Cecil County, MD, Chester County, PA

The radar

The Dover AFB radar (KDOX), 107 km from the middle of the area, began a volume at 22:50 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 6, 1:55 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.8 hours before the alert went out and 19 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: 477 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 1115 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 37 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.

000 
WUUS51 KPHI 062251
SVRPHI
MDC015-PAC029-062345-
/O.NEW.KPHI.SV.W.0034.050606T2250Z-050606T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
650 PM EDT MON JUN 6 2005

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CECIL COUNTY IN NORTHEAST MARYLAND
  SOUTHWESTERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA

* UNTIL 745 PM EDT

* AT 644 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM 15 MILES SOUTH OF 
  LANCASTER TO 22 MILES NORTHEAST OF BALTIMORE...AND MOVING EAST
  AT 35 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  RISING SUN BY 710 PM EDT
  OXFORD BY 715 PM EDT
  WEST GROVE AND NORTH EAST BY 725 PM EDT
  ELKTON BY 735 PM EDT

LAT...LON 3984 7628 3954 7636 3941 7605 3941 7581
      3983 7581

$$

KRUZDLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 7:15 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	60 min
Jun 6, 1:48 PM EDT	Severe Thunderstorm Warning	PHI	Carbon	57 min
Jun 6, 1:56 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	64 min
Jun 6, 2:00 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	60 min
Jun 6, 2:05 PM EDT	Severe Thunderstorm Warning	PHI	Berks	55 min
Jun 6, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	57 min
Jun 6, 3:30 PM EDT	Flash Flood Warning	PHI	Berks	3 hr

Nearby

Severe Thunderstorm Warnings in Maryland, 2005 Severe Thunderstorm Warnings in Pennsylvania, 2005 Every severe thunderstorm warning in 2005

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.