Alert archive / New Jersey / Areal Flood Advisories in 2009

Areal Flood Advisory 14, NWS Philadelphia/Mount Holly

June 9, 2009Burlington County, Camden County, Gloucester County, New Jersey; Delaware County, Montgomery County, Philadelphia County, Pennsylvania; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this areal flood advisory at Jun 9, 2009, 8:20 AM EDT for Burlington County, Camden County, Gloucester County, New Jersey; Delaware County, Montgomery County, Philadelphia County, Pennsylvania; New Castle County, Delaware. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jun 9, 2009, 8:20 AM EDT (12:20 UTC)
Expired: Jun 9, 2009, 11:15 AM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 12:22 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, 0.3 hours before the alert went out and 90 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1272 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 804 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.9

Open this sounding in Storm Lab

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 Jun 9, 5:49 AM EDT, 2 hours 31 minutes earlier.

Area forecast discussion, Jun 9, 5:49 AM EDT, 2 hours 31 minutes before

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Hazardous weather outlook, Jun 9, 4:40 AM EDT, 3 hours 40 minutes before

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In the hours before

Special weather statement, Jun 9, 6:44 AM EDT, 1 hour 36 minutes before

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Local storm report, Jun 9, 7:00 AM EDT, 1 hour 20 minutes before

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Special weather statement, Jun 9, 7:15 AM EDT, 1 hour 5 minutes before

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Local storm report, Jun 9, 7:34 AM EDT, 46 minutes before

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Special weather statement, Jun 9, 7:41 AM EDT, 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
741 AM EDT TUE JUN 9 2009

DEZ001>003-MDZ008-012-015-019-020-NJZ016-PAZ067-091230-
CAROLINE MD-CECIL MD-CHESTER PA-INLAND SUSSEX DE-KENT MD-KENT DE-
NEW CASTLE DE-QUEEN ANNES MD-SALEM NJ-TALBOT MD-
741 AM EDT TUE JUN 9 2009

...NUMEROUS STRONG THUNDERSTORMS WILL AFFECT CAROLINE...CECIL...
CHESTER...KENT...NEW CASTLE...QUEEN ANNES...SALEM...SUSSEX AND
TALBOT COUNTIES THROUGH 8:30 AM...

AT 735 AM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED NUMEROUS
STRONG THUNDERSTORMS MOVING EASTWARD INTO THE NORTHEAST MARYLAND
AREA. THE STRONGEST THUNDERSTORMS WERE MOVING INTO TALBOT AND QUEEN
ANNES COUNTIES. THE THUNDERSTORMS WERE MOVING EAST AT 25 MPH.
THUNDERSTORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH AS
WELL AS SMALL HAIL. DANGEROUS CLOUD TO GROUND LIGHTING WILL ALSO BE
OCCURRING WITH THESE STORMS.

THUNDERSTORMS WILL BE NEAR SKIPTON AND WYE MILLS AROUND 745
AM...CORDOVA...STARR AROUND 800 AM...GRIFFIN...HILLSBORO AROUND 815
AM...DENTON AND GREENSBORO AROUND 830 AM.

JRP

Local storm report, Jun 9, 7:44 AM EDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
744 AM EDT TUE JUN 09 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0215 AM     FLOOD            HANOVER TOWNSHIP        40.82N 74.43W
06/09/2009                   MORRIS             NJ   TRAINED SPOTTER

            FLOODING WAS REPORTED ON ROUTE 10.

0231 AM     LIGHTNING        5 E MORRIS PLAINS       40.84N 74.39W
06/09/2009                   MORRIS             NJ   TRAINED SPOTTER

            A HOUSE IN CEDAR KNOLLS WAS STRUCK BY LIGHTNING AND ON
            FIRE. REPORT CONFIRMED BY THE HANOVER TOWNSHIP POLICE.

0610 AM     HAIL             WOMELSDORF              40.37N 76.19W
06/09/2009  E0.25 INCH       BERKS              PA   PUBLIC

            PEA SIZE HAIL REPORTED IN WOMELSDORF.

0630 AM     TSTM WND DMG     WEST READING            40.33N 75.95W
06/09/2009                   BERKS              PA   TRAINED SPOTTER

            TREE LIMBS REPORTED DOWN IN THE BLANDON AND WEST READING
            AREAS.

0728 AM     HAIL             1 E KEMBLESVILLE        39.75N 75.81W
06/09/2009  E0.25 INCH       CHESTER            PA   TRAINED SPOTTER

            PEA SIZE HAIL REPORTED JUST EAST OF KEMBLESVILLE.

0737 AM     HAIL             HOCKESSIN               39.78N 75.69W
06/09/2009  E0.25 INCH       NEW CASTLE         DE   TRAINED SPOTTER

            PEA SIZE HAIL REPORTED IN HOCKESSIN.

&&

MEOLA/GORSE

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 9, 12:48 AM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	42 min
Jun 9, 2:20 AM EDT	Areal Flood Advisory	PHI	Morris	100 min
Jun 9, 4:17 AM EDT	Dense Fog Advisory	PHI	Atlantic, Burlington, Camden, Hunterdon, Mercer, Middlesex and 3 more	5 hr
Jun 9, 8:00 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Salem	60 min
Jun 9, 8:06 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	54 min
Jun 9, 8:30 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Gloucester, Salem	60 min
Jun 9, 8:42 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Gloucester, Mercer, Middlesex and 4 more	3 hr
Jun 9, 8:43 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	62 min
Jun 9, 8:47 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	70 min
Jun 9, 9:09 AM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May, Cumberland	3 hr
Jun 9, 9:21 AM EDT	Special Marine Warning	PHI		54 min
Jun 9, 1:49 PM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 3 more	5 hr
Jun 9, 5:38 AM EDT	Severe Thunderstorm Warning	PHI	Berks	67 min
Jun 9, 7:20 AM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	55 min
Jun 9, 9:56 AM EDT	Flash Flood Warning	PHI	Chester	105 min
Jun 9, 2:20 PM EDT	Flash Flood Warning	PHI	Berks, Chester	3 hr
Jun 9, 2:24 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	66 min
Jun 9, 2:59 PM EDT	Tornado Warning	PHI	Chester	32 min
Jun 9, 3:08 PM EDT	Tornado Warning	PHI	Chester	28 min
Jun 9, 3:14 PM EDT	Tornado Warning	PHI	Chester	46 min
Jun 9, 3:29 PM EDT	Severe Thunderstorm Warning	PHI	Chester	61 min
Jun 9, 8:31 AM EDT	Severe Thunderstorm Warning	PHI	Sussex	59 min
Jun 9, 4:19 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	56 min
Jun 9, 5:13 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	92 min
Jun 9, 6:57 PM EDT	Severe Thunderstorm Warning	PHI	Kent	39 min

Nearby

Areal Flood Advisories in New Jersey, 2009 Areal Flood Advisories in Pennsylvania, 2009 Areal Flood Advisories in Delaware, 2009 Every 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.