Alert archive / Maryland / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 115, NWS Philadelphia/Mount Holly

August 7, 2005Caroline County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2005, 12:09 PM EDT for Caroline County, Maryland. It was in force for 39 min. 1 report 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: Aug 7, 2005, 12:09 PM EDT (16:09 UTC)
Expired: Aug 7, 2005, 12:48 PM EDT
In force: 39 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Caroline County, MD

The radar

The Dover AFB radar (KDOX), 37 km from the middle of the area, began a volume at 16:11 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
Aug 7, 12:35 PM EDT	TSTM WND DMG	Denton, MD	TREES AND WIRES DOWN.

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

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 4.2 hours before the alert went out and 111 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: 2719 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 581 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 071609
SVRPHI
MDC011-071700-
/O.NEW.KPHI.SV.W.0115.050807T1609Z-050807T1700Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1209 PM EDT SUN AUG 7 2005

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CAROLINE COUNTY IN EASTERN MARYLAND

* UNTIL 100 PM EDT

* AT 1207 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS
  STORM WAS LOCATED 6 MILES WEST OF DENTON...OR ABOUT 30 MILES
  SOUTHWEST OF DOVER...AND MOVING EAST AT 5 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DENTON BY 1240 PM EDT

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 3891 7594 3871 7595 3870 7573 3908 7577

$$

RNS

1 follow-up statement

000 
WWUS51 KPHI 071648
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1248 PM EDT SUN AUG 7 2005

MDC011-071658-
/O.CAN.KPHI.SV.W.0115.000000T0000Z-050807T1700Z/
CAROLINE MD-
1248 PM EDT SUN AUG 7 2005

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CAROLINE COUNTY IS
CANCELLED...

THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED AWAY AND NO LONGER
POSE A SEVERE WEATHER THREAT TO THE LOCAL AREA.

LAT...LON 3891 7594 3871 7595 3870 7573 3908 7577

$$

RNS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 11:28 AM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	34 min
Aug 7, 11:38 AM EDT	Tornado Warning	PHI	Queen Anne's	21 min

Nearby

Severe Thunderstorm Warnings in Maryland, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.