Alert archive / Pennsylvania / Areal Flood Warnings in 2017
Areal Flood Warning 8, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood warning at Jun 24, 2017, 2:10 PM EDT for Philadelphia County, Pennsylvania. It was in force for 110 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 24, 2017, 2:10 PM EDT (18:10 UTC)
- Expired
- Jun 24, 2017, 4:00 PM EDT
- In force
- 110 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 55 km from the middle of the area, began a volume at 18:12 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.2 hours before the alert went out and 239 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1108 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
700 WGUS41 KPHI 241810 FLWPHI BULLETIN - IMMEDIATE BROADCAST REQUESTED Flood Warning National Weather Service Mount Holly NJ 210 PM EDT SAT JUN 24 2017 PAC101-242000- /O.NEW.KPHI.FA.W.0008.170624T1810Z-170624T2000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Philadelphia PA- 210 PM EDT SAT JUN 24 2017 The National Weather Service in Mount Holly NJ has issued a * Flood Warning for... Northeastern Philadelphia County in southeastern Pennsylvania... * Until 400 PM EDT * At 205 PM EDT, the stage of the Pennypack Creek in Philadelphia was 7.34 feet and falling. Flood stage is 7 feet. The flood warning has therefore been extended until 400 PM or until the creek drops below the 7 foot flood stage. There could also be some minor flooding along the Wissahickon Creek which is experiencing rises from rain earlier today as well, but any additional increase in water level should be limited to under one foot. LAT...LON 4013 7501 4004 7499 4000 7507 4008 7508 $$ jjm
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 8:54 PM EDT | Areal Flood Advisory | PHI | Northampton | 3 hr |
| Jun 23, 9:23 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Northampton | 112 min |
| Jun 23, 11:42 PM EDT | Areal Flood Advisory | PHI | Chester | 4 hr |
| Jun 23, 11:58 PM EDT | Special Weather Statement | PHI | Philadelphia | 47 min |
| Jun 24, 3:25 AM EDT | Areal Flood Advisory | PHI | Bucks, Lehigh, Monroe, Montgomery, Northampton | 4 hr |
| Jun 24, 4:02 AM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Montgomery | 4 hr |
| Jun 24, 5:22 AM EDT | Areal Flood Advisory | PHI | Chester, Montgomery | 4 hr |
| Jun 24, 7:09 AM EDT | Areal Flood Advisory | PHI | Bucks | 4 hr |
| Jun 24, 7:21 AM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| Jun 24, 11:16 AM EDT | Areal Flood Warning | PHI | Philadelphia | 3 hr |
Nearby
Areal Flood Warnings in Pennsylvania, 2017Every areal flood warning in 2017
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.