Alert archive / Maryland / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 83, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 20, 2009, 3:57 PM EDT for Kent County, Queen Anne's County, Talbot County, Maryland. It was in force for 66 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
- Jun 20, 2009, 3:57 PM EDT (19:57 UTC)
- Expired
- Jun 20, 2009, 5:03 PM EDT
- In force
- 66 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 70 km from the middle of the area, began a volume at 19:57 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 |
|---|---|---|---|
| Jun 20, 4:15 PM EDT | TSTM WND DMG | 5 Sse Overton, MD | SWATH OF DAMAGE TO CORN FIELD IN GRASONVILLE. |
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 |
|---|---|---|---|
| Jun 20, 3:05 PM EDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.0 hours before the alert went out and 102 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
- 1441 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 978 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 201957
SVRPHI
MDC029-035-041-202115-
/O.NEW.KPHI.SV.W.0083.090620T1957Z-090620T2115Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
357 PM EDT SAT JUN 20 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTH CENTRAL TALBOT COUNTY IN EASTERN MARYLAND...
SOUTHWESTERN KENT COUNTY IN NORTHEAST MARYLAND...
SOUTHWESTERN QUEEN ANNES COUNTY IN NORTHEAST MARYLAND...
THIS INCLUDES THE CITY OF CENTERVILLE...
* UNTIL 515 PM EDT
* AT 354 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED 7 MILES NORTHWEST OF
STEVENSVILLE...OR 17 MILES WEST OF CENTERVILLE...AND MOVING
SOUTHEAST AT 25 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
STEVENSVILLE AROUND 410 PM EDT...
OVERTON AND CHESTER AROUND 415 PM EDT...
GRASONVILLE AROUND 425 PM EDT...
6 MILES SOUTHWEST OF CENTERVILLE AROUND 435 PM EDT...
WYE MILLS AROUND 440 PM EDT...
SKIPTON AND STARR AROUND 445 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. 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.
&&
LAT...LON 3905 7631 3899 7624 3901 7617 3910 7615
3908 7619 3901 7619 3903 7625 3907 7623
3916 7628 3906 7592 3879 7611 3886 7622
3890 7623 3893 7628 3890 7630 3894 7638
TIME...MOT...LOC 1956Z 299DEG 21KT 3907 7636
$$
KRUZDLO2 follow-up statements
000
WWUS51 KPHI 202044
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
444 PM EDT SAT JUN 20 2009
MDC029-035-041-202115-
/O.CON.KPHI.SV.W.0083.000000T0000Z-090620T2115Z/
KENT MD-QUEEN ANNES MD-TALBOT MD-
444 PM EDT SAT JUN 20 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTH CENTRAL TALBOT...CENTRAL QUEEN ANNES AND SOUTHWESTERN KENT
COUNTIES...
AT 442 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR CARVILLE...OR NEAR CENTERVILLE...MOVING SOUTHEAST AT 25
MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
8 MILES NORTHEAST OF SKIPTON BY 450 PM EDT...
LAT...LON 3916 7628 3912 7613 3911 7613 3912 7612
3906 7592 3884 7607 3898 7623 3901 7617
3910 7615 3908 7619 3901 7619 3903 7625
3907 7623
TIME...MOT...LOC 2044Z 304DEG 22KT 3901 7601
$$
KRUZDLO000
WWUS51 KPHI 202103
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
503 PM EDT SAT JUN 20 2009
MDC029-035-041-202113-
/O.CAN.KPHI.SV.W.0083.000000T0000Z-090620T2115Z/
KENT MD-QUEEN ANNES MD-TALBOT MD-
503 PM EDT SAT JUN 20 2009
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL TALBOT...CENTRAL
QUEEN ANNES AND SOUTHWESTERN KENT COUNTIES IS CANCELLED...
LAT...LON 3916 7628 3912 7613 3911 7613 3912 7612
3906 7592 3884 7607 3898 7623 3901 7617
3910 7615 3908 7619 3901 7619 3903 7625
3907 7623
TIME...MOT...LOC 2103Z 304DEG 22KT 3894 7589
$$
KRUZDLOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 4:06 PM EDT | Tornado Warning | PHI | Kent, Queen Anne's, Talbot | 32 min |
| Jun 20, 4:27 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 53 min |
| Jun 20, 5:01 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 59 min |
Nearby
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.