Alert archive / Maryland / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 49, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 3, 2009, 6:21 PM EDT for Kent County, Queen Anne's County, Maryland; Kent County, New Castle County, Delaware. It was in force for 54 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 3, 2009, 6:21 PM EDT (22:21 UTC)
- Expired
- Jun 3, 2009, 7:15 PM EDT
- In force
- 54 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, New Castle County, DE, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 67 km from the middle of the area, began a volume at 22:23 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 3, 6:22 PM EDT | HAIL 0.75 | 3 S Galena, MD |
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 3, 1:06 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.4 hours before the alert went out and 29 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
- 13 J/kg
- Mixed-layer CIN
- -276 J/kg
- Mixed-layer LCL
- 1089 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 032221
SVRPHI
DEC001-003-MDC029-035-032315-
/O.NEW.KPHI.SV.W.0049.090603T2221Z-090603T2315Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
621 PM EDT WED JUN 3 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN KENT COUNTY IN CENTRAL DELAWARE...
NORTHEASTERN KENT COUNTY IN NORTHEAST MARYLAND...
NORTHEASTERN QUEEN ANNES COUNTY IN NORTHEAST MARYLAND...
SOUTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
THIS INCLUDES THE CITY OF MIDDLETOWN...
* UNTIL 715 PM EDT
* AT 621 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
SASSAFRAS...OR 7 MILES SOUTHWEST OF MIDDLETOWN...AND MOVING
SOUTHEAST AT 10 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
SASSAFRAS AROUND 630 PM EDT...
MASSEY AND 6 MILES SOUTHWEST OF MIDDLETOWN AROUND 635 PM EDT...
9 MILES NORTHEAST OF MILLINGTON AROUND 640 PM EDT...
DELANEY CORNER AROUND 655 PM EDT...
GREEN SPRING...CLAYTON AND SMYRNA AROUND 715 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
WEDNESDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY.
&&
LAT...LON 3937 7593 3937 7587 3938 7584 3939 7577
3948 7577 3949 7572 3948 7561 3938 7552
3913 7566 3916 7592 3928 7602
TIME...MOT...LOC 2221Z 301DEG 10KT 3939 7582
$$
JJM1 follow-up statement
000
WWUS51 KPHI 032301
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
701 PM EDT WED JUN 3 2009
DEC003-MDC029-032311-
/O.CAN.KPHI.SV.W.0049.000000T0000Z-090603T2315Z/
KENT MD-NEW CASTLE DE-
701 PM EDT WED JUN 3 2009
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN NEW CASTLE AND
NORTHEASTERN KENT COUNTIES IS CANCELLED...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
WEDNESDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY.
LAT...LON 3927 7585 3925 7581 3925 7577 3930 7575
3929 7568 3931 7559 3935 7555 3935 7554
3914 7567 3916 7591 3922 7597
TIME...MOT...LOC 2301Z 341DEG 10KT 3934 7555 3919 7593
$$
DEC001-MDC035-032315-
/O.CON.KPHI.SV.W.0049.000000T0000Z-090603T2315Z/
KENT DE-QUEEN ANNES MD-
701 PM EDT WED JUN 3 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHEASTERN QUEEN ANNES AND NORTHWESTERN KENT COUNTIES...
AT 658 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM SMYRNA TO SUDLERSVILLE...
MOVING SOUTH AT 10 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
SUDLERSVILLE AND SMYRNA BY 710 PM EDT...
KENTON AND HARTLY BY 715 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
WEDNESDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY.
&&
LAT...LON 3927 7585 3925 7581 3925 7577 3930 7575
3929 7568 3931 7559 3935 7555 3935 7554
3914 7567 3916 7591 3922 7597
TIME...MOT...LOC 2301Z 341DEG 10KT 3934 7555 3919 7593
$$
AMCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 3, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 54 min |
| Jun 3, 6:10 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 65 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2009Severe Thunderstorm Warnings in Delaware, 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.