Alert archive / Pennsylvania / Areal Flood Advisories in 2020
Areal Flood Advisory 9, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Apr 13, 2020, 2:37 PM EDT for Hunterdon County, Mercer County, New Jersey; 8 counties in Pennsylvania. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Apr 13, 2020, 2:37 PM EDT (18:37 UTC)
- Expired
- Apr 13, 2020, 4:55 PM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Mercer County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 87 km from the middle of the area, began a volume at 18:41 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
Brookhaven, NY (KOKX), launched 12:00Z, 6.6 hours before the alert went out and 216 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
- 5 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 428 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 455 m²/s²
- 0-3 km storm-relative helicity
- 813 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Apr 13, 2:28 PM EDT, 9 minutes earlier.
Area forecast discussion, Apr 13, 2:28 PM EDT, 9 minutes before
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</html>Hazardous weather outlook, Apr 13, 2:22 PM EDT, 15 minutes before
Hazardous Weather Outlook National Weather Service Mount Holly NJ 222 PM EDT Mon Apr 13 2020 NJZ001-007>010-PAZ054-055-060>062-101>103-105-141830- Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks-Lehigh- Northampton-Western Chester-Eastern Chester-Western Montgomery- Upper Bucks- 222 PM EDT Mon Apr 13 2020 ...WIND ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING... ...TORNADO WATCH 119 IN EFFECT UNTIL 6 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northern New Jersey, northwest New Jersey, east central Pennsylvania, northeast Pennsylvania and southeast Pennsylvania. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Tornado Watch. Wind Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. MDZ012-NJZ021-141830- Kent MD-Cumberland- 222 PM EDT Mon Apr 13 2020 ...HIGH WIND WARNING IN EFFECT UNTIL 7 PM EDT THIS EVENING... ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... ...TORNADO WATCH 119 IN EFFECT UNTIL 6 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northeast Maryland and southern New Jersey. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. Tornado Watch. Coastal Flood Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. DEZ002>004-MDZ015-019-020-NJZ012>015-020-022>027-PAZ104-141830- Kent-Inland Sussex-Delaware Beaches-Queen Annes-Talbot-Caroline- Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Ocean-Atlantic- Cape May-Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington-Eastern Montgomery- 222 PM EDT Mon Apr 13 2020 ...HIGH WIND WARNING IN EFFECT UNTIL 7 PM EDT THIS EVENING... ...TORNADO WATCH 119 IN EFFECT UNTIL 6 PM EDT THIS EVENING... This Hazardous Weather Outlook is for central Delaware, southern Delaware, northeast Maryland, central New Jersey, northern New Jersey, southern New Jersey and southeast Pennsylvania. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. Tornado Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. NJZ017>019-PAZ070-071-106-141830- Gloucester-Camden-Northwestern Burlington-Delaware-Philadelphia- Lower Bucks- 222 PM EDT Mon Apr 13 2020 ...HIGH WIND WARNING IN EFFECT UNTIL 7 PM EDT THIS EVENING... ...TORNADO WATCH 119 IN EFFECT UNTIL 6 PM EDT THIS EVENING... ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING... This Hazardous Weather Outlook is for southern New Jersey and southeast Pennsylvania. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. Tornado Watch. Coastal Flood Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. DEZ001-NJZ016-141830- New Castle-Salem- 222 PM EDT Mon Apr 13 2020 ...HIGH WIND WARNING IN EFFECT UNTIL 7 PM EDT THIS EVENING... ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 6 PM EDT THIS EVENING... ...TORNADO WATCH 119 IN EFFECT UNTIL 6 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northern Delaware and southern New Jersey. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. Tornado Watch. Coastal Flood Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. MDZ008-141830- Cecil- 222 PM EDT Mon Apr 13 2020 ...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... ...WIND ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING... ...TORNADO WATCH 119 IN EFFECT UNTIL 6 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northeast Maryland. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Tornado Watch. Wind Advisory. Coastal Flood Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. ANZ450>455-141830- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 222 PM EDT Mon Apr 13 2020 ...STORM WARNING IN EFFECT UNTIL 7 PM EDT THIS EVENING... This Hazardous Weather Outlook is for Atlantic coastal waters. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Storm Warning. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. ANZ430-431-141830- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- 222 PM EDT Mon Apr 13 2020 ...STORM WARNING IN EFFECT UNTIL 7 PM EDT THIS EVENING... ...TORNADO WATCH 119 IN EFFECT UNTIL 6 PM EDT THIS EVENING... This Hazardous Weather Outlook is for Delaware Bay Waters. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Tornado Watch. Storm Warning. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines.
In the hours before
Local storm report, Apr 13, 1:50 PM EDT, 47 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
150 PM EDT MON APR 13 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0143 PM COASTAL FLOOD 1 SSW POINT PLEASANT 40.06N 74.07W
04/13/2020 OCEAN NJ PUBLIC
FLOODING ON BEAVER DAM ROAD.
&&Local storm report, Apr 13, 1:58 PM EDT, 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
158 PM EDT MON APR 13 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0100 PM NON-TSTM WND DMG WILDWOOD 38.99N 74.82W
04/13/2020 CAPE MAY NJ PUBLIC
DAMAGE TO BOARDWALK IN WILDWOOD.
&&Local storm report, Apr 13, 2:01 PM EDT, 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
201 PM EDT MON APR 13 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0127 PM FLOOD 1 WNW PUGHTOWN 40.17N 75.69W
04/13/2020 CHESTER PA DEPT OF HIGHWAYS
FLOODING ON BETHEL CHURCH ROAD BETWEEN RIDGE
ROAD AND ELLIS WOODS ROAD.
&&
TCDLocal storm report, Apr 13, 2:06 PM EDT, 31 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
206 PM EDT MON APR 13 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0100 PM NON-TSTM WND DMG MILLVILLE 39.40N 75.04W
04/13/2020 CUMBERLAND NJ PUBLIC
TREE DOWN.
&&Local storm report, Apr 13, 2:16 PM EDT, 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
216 PM EDT MON APR 13 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1200 PM NON-TSTM WND DMG CAPE MAY 38.93N 74.92W
04/13/2020 CAPE MAY NJ PUBLIC
DAMAGE TO THE ROOF OF CONGRESS HALL.
&&Local storm report, Apr 13, 2:28 PM EDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
228 PM EDT MON APR 13 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0224 PM NON-TSTM WND DMG 1 SSW ATLANTIC CITY 39.36N 74.43W
04/13/2020 ATLANTIC NJ BROADCAST MEDIA
DAMAGE REPORTED TO A TRAFFIC LIGHT AT
TENNESSEE AVENUE AND PACIFIC AVENUE.
&&
MEOLAThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 3:43 AM EDT | Coastal Flood Statement | PHI | Ocean | 17 hr |
| Apr 13, 6:17 AM EDT | Special Weather Statement | PHI | Gloucester, Salem | 28 min |
| Apr 13, 6:48 AM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Salem | 4 hr |
| Apr 13, 8:03 AM EDT | Areal Flood Advisory | PHI | Burlington, Hunterdon, Mercer, Middlesex, Somerset | 4 hr |
| Apr 13, 8:36 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Middlesex, Morris, Somerset | 4 hr |
| Apr 13, 10:29 AM EDT | Areal Flood Warning | PHI | Hunterdon, Somerset | 7 hr |
| Apr 13, 1:01 PM EDT | Areal Flood Advisory | PHI | Sussex, Warren | 4 hr |
| Apr 13, 2:41 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 64 min |
| Apr 13, 3:40 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 65 min |
| Apr 13, 3:52 PM EDT | Special Marine Warning | PHI | 23 min | |
| Apr 13, 4:13 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 31 min |
| Apr 13, 6:32 PM EDT | Small Craft Advisory | PHI | 21 hr | |
| Apr 13, 6:11 AM EDT | Areal Flood Advisory | PHI | Berks, Chester, Delaware, Montgomery | 4 hr |
| Apr 13, 10:58 AM EDT | River Flood Warning | PHI | Chester | 6 hr |
| Apr 13, 11:09 AM EDT | Areal Flood Warning | PHI | Chester, Delaware | 3 hr |
| Apr 13, 12:29 PM EDT | River Flood Warning | PHI | Chester, Delaware | 12 hr |
| Apr 13, 1:07 PM EDT | Flash Flood Warning | PHI | Berks, Carbon, Lehigh, Northampton | 4 hr |
| Apr 13, 1:27 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 33 min |
| Apr 13, 1:47 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Apr 13, 2:23 PM EDT | Areal Flood Warning | PHI | Montgomery, Philadelphia | 4 hr |
| Apr 13, 4:35 PM EDT | Areal Flood Warning | PHI | Montgomery | 2 hr |
| Apr 13, 5:12 AM EDT | Special Weather Statement | PHI | Kent, New Castle | 33 min |
| Apr 13, 5:41 AM EDT | Special Weather Statement | PHI | New Castle | 34 min |
| Apr 13, 5:44 AM EDT | Special Weather Statement | PHI | Kent, Sussex | 31 min |
| Apr 13, 6:42 AM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 4 hr |
| Apr 13, 11:25 AM EDT | River Flood Warning | PHI | New Castle | 4 hr |
| Apr 13, 12:13 PM EDT | River Flood Warning | PHI | New Castle | 3 hr |
| Apr 13, 3:22 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 38 min |
| Apr 13, 3:26 PM EDT | Tornado Warning | PHI | Kent | 13 min |
| Apr 13, 3:45 PM EDT | Tornado Warning | PHI | Kent | 15 min |
Nearby
Areal Flood Advisories in Pennsylvania, 2020Areal Flood Advisories in New Jersey, 2020Every areal flood advisory in 2020
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.