Alert archive / New Jersey / Areal Flood Advisories in 2009
Areal Flood Advisory 73, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Aug 22, 2009, 4:26 AM EDT for 6 counties in New Jersey; Kent County, Sussex County, Delaware. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Aug 22, 2009, 4:26 AM EDT (08:26 UTC)
- Expired
- Aug 22, 2009, 10:30 AM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Sussex County, DE, Atlantic County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 64 km from the middle of the area, began a volume at 08:28 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
Wallops Is Stn, VA (KWAL), launched 00:00Z, 8.4 hours before the alert went out and 159 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
- 2017 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 833 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.2
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at Aug 22, 4:21 AM EDT, 5 minutes earlier.
Area forecast discussion, Aug 22, 4:21 AM EDT, 5 minutes before
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</html>Hazardous weather outlook, Aug 22, 3:15 AM EDT, 1 hour 11 minutes before
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Special weather statement, Aug 21, 11:14 PM EDT, 5 hours 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1114 PM EDT FRI AUG 21 2009 DEZ001-002-MDZ008-012-015-019-020-220445- CAROLINE MD-CECIL MD-KENT MD-KENT DE-NEW CASTLE DE-QUEEN ANNES MD- TALBOT MD- 1114 PM EDT FRI AUG 21 2009 ...A STRONG THUNDERSTORM WILL AFFECT CAROLINE...CECIL...KENT...NEW CASTLE...QUEEN ANNES AND TALBOT COUNTIES... AT 1112 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 9 MILES SOUTHEAST OF CENTERVILLE...MOVING NORTHEAST AT 30 MPH. THE THUNDERSTORM WILL BE NEAR MARYDEL... HENDERSON AROUND 1130 PM...HARTLY...TEMPLEVILLE AROUND 1145 PM... KENTON...CLAYTON AROUND MIDNIGHT...SMYRNA...CHAMBERSVILLE AROUND 1215 AM...ODESSA AND MOUNT PLEASANT AROUND 1230 AM. VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM. EXPECT INTENSE LIGHTNING FROM THIS STORM. DO NOT SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES. RNS
Special weather statement, Aug 22, 12:20 AM EDT, 4 hours 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1220 AM EDT SAT AUG 22 2009 DEZ001-002-MDZ015-020-NJZ007>010-015>019-021-PAZ061-062-068>071- 220615- BUCKS PA-CAMDEN NJ-CAROLINE MD-CUMBERLAND NJ-DELAWARE PA- GLOUCESTER NJ-HUNTERDON NJ-KENT DE-LEHIGH PA-MERCER NJ-MONTGOMERY PA- MORRIS NJ-NEW CASTLE DE-NORTHAMPTON PA-NORTHWESTERN BURLINGTON NJ- PHILADELPHIA PA-QUEEN ANNES MD-SALEM NJ-SOMERSET NJ-WARREN NJ- 1220 AM EDT SAT AUG 22 2009 ...STRONG THUNDERSTORMS SOME WITH HEAVY RAIN WILL AFFECT BUCKS... BURLINGTON...CAMDEN...CAROLINE...CUMBERLAND...DELAWARE... GLOUCESTER...HUNTERDON...KENT...LEHIGH...MERCER...MONTGOMERY... MORRIS...NEW CASTLE...NORTHAMPTON...PHILADELPHIA...QUEEN ANNES... SALEM...SOMERSET AND WARREN COUNTIES... AT 1215 AM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED SHOWERS AND STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 16 MILES SOUTHEAST OF EASTON TO 14 MILES SOUTHWEST OF DOVER...MOVING EAST-NORTHEAST AT 15 TO 20 MPH. THE THUNDERSTORMS WILL BE NEAR LEBANON...CALIFON...SOUTH PHILADELPHIA...AND ABINGTON AROUND 1225 AM...LONG VALLEY...KENSINGTON...CENTER CITY...AND WEST DEPTFORD AROUND 1230 AM. VERY HEAVY RAINFALL WILL OCCUR OVER AREAS THAT RECEIVED HEAVY RAINS EARLIER. BE ALERT FOR THE POSSIBILITY OF LOCALIZED FLOODING. WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS...AS WELL AS SMALL HAIL AND FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING.
Local storm report, Aug 22, 2:44 AM EDT, 1 hour 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
244 AM EDT SAT AUG 22 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0228 AM FLASH FLOOD 3 S SOMERDALE 39.80N 75.02W
08/22/2009 CAMDEN NJ AMATEUR RADIO
FLASH FLOODING MINNETONKA RD IN HI-NELLA 3 FT OR WATER ON
THE ROAD
&&
RNSLocal storm report, Aug 22, 4:20 AM EDT, 6 minutes before
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</html>The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 1:28 AM EDT | Flash Flood Warning | PHI | Camden, Cumberland, Gloucester, Salem | 4 hr |
| Aug 22, 1:40 AM EDT | Areal Flood Advisory | PHI | Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 1 more | 3 hr |
| Aug 22, 3:36 AM EDT | Flash Flood Warning | PHI | Somerset | 4 hr |
| Aug 22, 5:42 AM EDT | Areal Flood Advisory | PHI | Camden, Cumberland, Gloucester, Salem | 3 hr |
| Aug 22, 9:01 AM EDT | Areal Flood Advisory | PHI | Atlantic, Cape May, Cumberland | 3 hr |
| Aug 22, 6:02 PM EDT | Flash Flood Warning | PHI | Mercer | 4 hr |
| Aug 22, 6:21 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 3 hr |
| Aug 22, 6:32 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester | 3 hr |
| Aug 22, 7:32 PM EDT | River Flood Warning | PHI | Mercer | 19 hr |
| Aug 21, 10:14 PM EDT | Areal Flood Advisory | PHI | Chester | 3 hr |
| Aug 21, 10:49 PM EDT | Flash Flood Warning | PHI | Chester | 55 min |
| Aug 22, 1:51 AM EDT | Flash Flood Warning | PHI | Montgomery, Philadelphia | 77 min |
| Aug 22, 6:03 AM EDT | Flash Flood Warning | PHI | Montgomery, Philadelphia | 3 hr |
| Aug 22, 7:00 PM EDT | Flash Flood Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Aug 22, 2:19 AM EDT | Areal Flood Advisory | PHI | Kent | 6 hr |
| Aug 22, 8:12 AM EDT | Areal Flood Advisory | PHI | Kent | 3 hr |
| Aug 22, 6:02 PM EDT | Flash Flood Warning | PHI | Kent, New Castle, Sussex | 4 hr |
Nearby
Areal Flood Advisories in New Jersey, 2009Areal Flood Advisories in Delaware, 2009Every areal flood advisory 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.