Alert archive / Maryland / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 74, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 15, 2009, 2:52 PM EDT for Kent County, Maryland. It was in force for 37 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 15, 2009, 2:52 PM EDT (18:52 UTC)
- Expired
- Jun 15, 2009, 3:29 PM EDT
- In force
- 37 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Kent County, MD
The radar
The Dover AFB radar (KDOX), 79 km from the middle of the area, began a volume at 18:52 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.9 hours before the alert went out and 27 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.
- Mixed-layer CAPE
- 196 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 943 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 151852
SVRPHI
MDC029-152000-
/O.NEW.KPHI.SV.W.0074.090615T1852Z-090615T2000Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
252 PM EDT MON JUN 15 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTERN KENT COUNTY IN NORTHEAST MARYLAND...
* UNTIL 400 PM EDT
* AT 251 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
DAMAGING WINDS TO 60 MPH. THIS STORM WAS LOCATED NEAR
NEWTOWN...OR 19 MILES NORTH OF CENTERVILLE...AND MOVING SOUTH AT 10
MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
CHESTERTOWN AROUND 345 PM EDT...
LANGFORD AROUND 355 PM EDT...
7 MILES NORTHEAST OF ROCK HALL AROUND 400 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
&&
LAT...LON 3917 7628 3920 7625 3934 7618 3934 7617
3934 7615 3938 7610 3938 7608 3924 7600
3909 7624 3911 7626 3914 7626 3914 7628
TIME...MOT...LOC 1852Z 344DEG 7KT 3931 7617
$$
GORSE1 follow-up statement
000
WWUS51 KPHI 151929
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
329 PM EDT MON JUN 15 2009
MDC029-151938-
/O.CAN.KPHI.SV.W.0074.000000T0000Z-090615T2000Z/
KENT MD-
329 PM EDT MON JUN 15 2009
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN KENT COUNTY IS
CANCELLED...
THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED
SUBSTANTIALLY, THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.
LAT...LON 3917 7628 3920 7625 3934 7618 3934 7617
3934 7615 3938 7610 3938 7608 3924 7600
3909 7624 3911 7626 3914 7626 3914 7628
TIME...MOT...LOC 1928Z 344DEG 7KT 3924 7615
$$
GORSE/DEFINONearby
Severe Thunderstorm Warnings in Maryland, 2009Every severe thunderstorm warning in 2009
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.