Alert archive / Maryland / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 85, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 20, 2009, 5:01 PM EDT for Cecil County, Kent County, Queen Anne's County, Maryland; Kent County, New Castle County, Delaware; Cumberland County, Salem County, New Jersey. It was in force for 59 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, 5:01 PM EDT (21:01 UTC)
- Expired
- Jun 20, 2009, 6:00 PM EDT
- In force
- 59 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, New Castle County, DE, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Cumberland County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 73 km from the middle of the area, began a volume at 21:01 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, 5:03 PM EDT | TSTM WND DMG | 5 Wsw Wilmington, DE | POWER LINE DOWN IN STANTON. |
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, 9.0 hours before the alert went out and 162 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 202101
SVRPHI
DEC001-003-MDC015-029-035-NJC011-033-202200-
/O.NEW.KPHI.SV.W.0085.090620T2101Z-090620T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
501 PM EDT SAT JUN 20 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN KENT COUNTY IN CENTRAL DELAWARE...
SOUTHEASTERN CECIL COUNTY IN NORTHEAST MARYLAND...
THIS INCLUDES THE CITY OF ELKTON...
NORTHEASTERN KENT COUNTY IN NORTHEAST MARYLAND...
NORTHEASTERN QUEEN ANNES COUNTY IN NORTHEAST MARYLAND...
NEW CASTLE COUNTY IN NORTHERN DELAWARE...
THIS INCLUDES THE CITIES OF...WILMINGTON...MIDDLETOWN...
NORTHWESTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
SALEM COUNTY IN SOUTHERN NEW JERSEY...
THIS INCLUDES THE CITY OF SALEM...
* UNTIL 600 PM EDT
* AT 500 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM STANTON TO GLASGOW TO BRANTWOOD
TO HOLLYWOOD BEACH TO 7 MILES WEST OF HOLLYWOOD BEACH...OR ALONG A
LINE EXTENDING FROM 8 MILES NORTHWEST OF WILMINGTON TO NEWARK TO
ELKTON TO 14 MILES SOUTHWEST OF ELKTON...AND MOVING SOUTHEAST AT 35
MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
NEWPORT AROUND 505 PM EDT...
WILMINGTON...BOHEMIAS MILLS...MOUNT PLEASANT AND SAINT GEORGES
AROUND 510 PM EDT...
CARNEYS POINT...WARWICK...CECILTON AND NEW CASTLE AROUND 515 PM
EDT...
SASSAFRAS AROUND 520 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.
THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS
&&
LAT...LON 3945 7600 3946 7602 3953 7599 3961 7580
3982 7556 3952 7504 3932 7533 3939 7545
3943 7548 3946 7555 3950 7557 3957 7553
3958 7556 3946 7558 3927 7540 3908 7567
3941 7604
TIME...MOT...LOC 2101Z 314DEG 32KT 3977 7565 3964 7574
3959 7576 3956 7580 3953 7586 3948 7602
$$
KRUZDLOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 3:57 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's, Talbot | 66 min |
| 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, 5:46 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 59 min |
| Jun 20, 6:23 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 27 min |
| Jun 20, 6:55 PM EDT | Coastal Flood Advisory | PHI | Kent, New Castle, Sussex | 5 hr |
| Jun 20, 4:33 AM EDT | Small Craft Advisory | PHI | 3 days | |
| Jun 20, 5:14 PM EDT | Special Marine Warning | PHI | 61 min | |
| Jun 20, 6:35 PM EDT | Special Marine Warning | PHI | 40 min | |
| Jun 20, 6:35 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 10 min |
| Jun 20, 6:38 PM EDT | Special Marine Warning | PHI | 52 min | |
| Jun 20, 7:29 PM EDT | Special Marine Warning | PHI | 61 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2009Severe Thunderstorm Warnings in Delaware, 2009Severe Thunderstorm Warnings in New Jersey, 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.