Alert archive / Pennsylvania / Areal Flood Warnings in 2024

Areal Flood Warning 47, NWS Philadelphia/Mount Holly

March 10, 2024Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood warning at Mar 10, 2024, 4:44 AM EDT for Philadelphia County, Pennsylvania. It was in force for 93 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 10, 2024, 4:44 AM EDT (08:44 UTC)
Expired: Mar 10, 2024, 6:17 AM EDT
In force: 93 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 62 km from the middle of the area, began a volume at 08:47 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 00:00Z, 8.7 hours before the alert went out and 214 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 478 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 579 m²/s²
0-3 km storm-relative helicity: 766 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 warning went out at Mar 10, 3:56 AM EDT, 48 minutes earlier.

Area forecast discussion, Mar 10, 3:56 AM EDT, 48 minutes before

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Hazardous weather outlook, Mar 10, 4:05 AM EDT, 39 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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In the hours before

Local storm report, Mar 9, 10:37 PM EST, 5 hours 7 minutes before

Preliminary Local Storm Report
National Weather Service Mount Holly NJ
1037 PM EST Sat Mar 9 2024

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

1020 PM     Rain             South River             40.45N 74.39W
03/09/2024  M1.40 inch       Middlesex          NJ   Trained Spotter

&&

RCM

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 9, 7:45 PM EST	Special Weather Statement	PHI	Camden, Cape May, Cumberland, Gloucester, Salem	30 min
Mar 9, 8:00 PM EST	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	3 hr
Mar 9, 8:03 PM EST	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Gloucester	27 min
Mar 9, 8:04 PM EST	Special Marine Warning	PHI		56 min
Mar 9, 8:07 PM EST	Special Weather Statement	PHI	Gloucester, Salem	23 min
Mar 9, 8:08 PM EST	Special Marine Warning	PHI		67 min
Mar 9, 8:09 PM EST	Areal Flood Advisory	PHI	Warren	3 hr
Mar 9, 8:11 PM EST	Areal Flood Advisory	PHI	Hunterdon, Morris, Sussex, Warren	3 hr
Mar 9, 8:13 PM EST	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 3 more	5 hr
Mar 9, 9:07 PM EST	River Flood Warning	PHI	Morris, Somerset	6 hr
Mar 9, 9:40 PM EST	River Flood Warning	PHI	Somerset	13 hr
Mar 9, 9:40 PM EST	Special Marine Warning	PHI		65 min
Mar 9, 9:41 PM EST	Special Weather Statement	PHI	Cape May	34 min
Mar 9, 9:42 PM EST	Areal Flood Warning	PHI	Hunterdon, Somerset	6 hr
Mar 9, 9:58 PM EST	River Flood Warning	PHI	Essex, Morris, Passaic	4 days
Mar 9, 9:59 PM EST	River Flood Warning	PHI	Essex, Passaic	3 days
Mar 9, 10:01 PM EST	River Flood Warning	PHI	Morris	43 hr
Mar 9, 11:15 PM EST	River Flood Warning	PHI	Hunterdon, Somerset	4 hr
Mar 10, 3:10 AM EDT	Areal Flood Warning	PHI	Mercer, Somerset	21 hr
Mar 10, 1:46 PM EDT	Areal Flood Warning	PHI	Warren	114 min
Mar 10, 6:17 PM EDT	Special Weather Statement	PHI	Atlantic	28 min
Mar 10, 6:19 PM EDT	Special Weather Statement	PHI	Ocean	41 min
Mar 10, 7:01 PM EDT	Special Weather Statement	PHI	Burlington, Camden	29 min
Mar 10, 7:43 PM EDT	Special Weather Statement	PHI	Warren	32 min
Mar 9, 8:03 PM EST	Areal Flood Advisory	PHI	Berks, Bucks, Lehigh, Montgomery	3 hr
Mar 9, 9:18 PM EST	River Flood Warning	PHI	Delaware	5 hr
Mar 9, 9:27 PM EST	Areal Flood Warning	PHI	Montgomery	6 hr
Mar 9, 10:55 PM EST	Areal Flood Warning	PHI	Philadelphia	4 hr
Mar 9, 11:22 PM EST	River Flood Warning	PHI	Chester	4 hr
Mar 9, 11:28 PM EST	Areal Flood Warning	PHI	Berks	5 hr
Mar 10, 12:47 AM EST	Areal Flood Warning	PHI	Lehigh	5 hr
Mar 10, 1:45 PM EDT	Snow Squall Warning	PHI	Carbon, Monroe	45 min
Mar 10, 2:32 PM EDT	Snow Squall Warning	PHI	Carbon, Monroe	43 min
Mar 10, 3:48 PM EDT	Snow Squall Warning	PHI	Carbon, Monroe	42 min
Mar 10, 4:28 PM EDT	Snow Squall Warning	PHI	Carbon, Monroe	62 min
Mar 10, 4:47 PM EDT	Special Weather Statement	PHI	Chester	43 min
Mar 10, 5:27 PM EDT	Snow Squall Warning	PHI	Carbon, Monroe	33 min
Mar 10, 5:33 PM EDT	Special Weather Statement	PHI	Montgomery, Philadelphia	27 min
Mar 10, 5:52 PM EDT	Special Weather Statement	PHI	Philadelphia	23 min
Mar 10, 7:04 PM EDT	Snow Squall Warning	PHI	Carbon, Lehigh, Monroe, Northampton	26 min
Mar 9, 8:41 PM EST	Special Weather Statement	PHI	Sussex	34 min
Mar 9, 10:14 PM EST	River Flood Warning	PHI	New Castle	4 hr
Mar 9, 10:32 PM EST	River Flood Warning	PHI	New Castle	4 hr
Mar 10, 2:05 PM EDT	Coastal Flood Advisory	PHI	Sussex	14 hr

Nearby

Areal Flood Warnings in Pennsylvania, 2024 Every areal flood warning in 2024

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.