Alert archive / Maryland / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 15, NWS Philadelphia/Mount Holly

April 3, 2006Cecil County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 3, 2006, 8:13 PM EDT for Cecil County, Maryland. It was in force for 62 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 3, 2006, 8:13 PM EDT (00:13 UTC)
Expired: Apr 3, 2006, 9:15 PM EDT
In force: 62 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Cecil County, MD

The radar

The Dover AFB radar (KDOX), 95 km from the middle of the area, began a volume at 00:14 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
Apr 3, 8:31 PM EDT	HAIL 0.75	Abingdon, MD
Apr 3, 8:37 PM EDT	HAIL 0.75	Belcamp, MD	POWER OUT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 3, 4:15 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.2 hours before the alert went out and 123 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: 84 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 812 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -181 m²/s²
0-3 km storm-relative helicity: -161 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 040015
SVRPHI
MDC015-040115-
/O.NEW.KPHI.SV.W.0015.060404T0013Z-060404T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
813 PM EDT MON APR 3 2006

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CECIL COUNTY IN NORTHEAST MARYLAND

* UNTIL 915 PM EDT

* AT 812 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED 29 MILES WEST OF
  CECILTON...OR ABOUT 11 MILES EAST OF BALTIMORE...AND MOVING EAST 
  NORTHEAST AT 30 MPH. HAIL TO 3/4 INCH OR MORE AND WIND GUSTS TO 60 
  MPH MAY ACCOMPANY THIS STORM.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  NORTH EAST BY 900 PM EDT
  CECILTON BY 905 PM EDT
  ELKTON BY 915 PM EDT

LAT...LON 3950 7639 3932 7634 3939 7581 3971 7582

$$

RPW

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 8:08 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	67 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2006 Every severe thunderstorm warning in 2006

Sources

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