Alert archive / Pennsylvania / Areal Flood Warnings in 2019
Areal Flood Warning 21, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood warning at Jun 10, 2019, 11:25 PM EDT for Chester County, Delaware County, Pennsylvania. It was in force for 112 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 10, 2019, 11:25 PM EDT (03:25 UTC)
- Expired
- Jun 11, 2019, 1:17 AM EDT
- In force
- 112 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Chester County, PA, Delaware County, PA
The radar
The Philadelphia radar (KDIX), 90 km from the middle of the area, began a volume at 03:27 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 00:00Z, 3.4 hours before the alert went out and 203 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
- 671 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
352 WGUS41 KPHI 110325 FLWPHI BULLETIN - IMMEDIATE BROADCAST REQUESTED Flood Warning National Weather Service Mount Holly NJ 1125 PM EDT Mon Jun 10 2019 PAC029-045-110730- /O.NEW.KPHI.FA.W.0021.190611T0325Z-190611T0730Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chester PA-Delaware PA- 1125 PM EDT Mon Jun 10 2019 The National Weather Service in Mount Holly NJ has issued a * Flood Warning for... Eastern Chester County in southeastern Pennsylvania... Central Delaware County in southeastern Pennsylvania... * Until 330 AM EDT. * At 1122 PM EDT, reporting gauges have indicated minor flooding is occurring at Crum Creek near Newtown Square. Up to two inches of rain have already fallen over the area with additional rainfall possible over the next few hours. * Flooding will remain over mainly rural areas of eastern Chester and central Delaware Counties. LAT...LON 4003 7547 3997 7539 3996 7545 4001 7554 $$ NC
1 follow-up statement
344 WGUS81 KPHI 110517 FLSPHI Flood Statement National Weather Service Mount Holly NJ 117 AM EDT Tue Jun 11 2019 PAC029-045-110524- /O.CAN.KPHI.FA.W.0021.000000T0000Z-190611T0730Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Chester PA-Delaware PA- 117 AM EDT Tue Jun 11 2019 ...THE FLOOD WARNING HAS BEEN CANCELLED FOR EASTERN CHESTER AND CENTRAL DELAWARE COUNTIES... The level of Crum's Creek has dropped down below flood stage over the past hour and thus the flood warning is cancelled. LAT...LON 4003 7547 3997 7539 3996 7545 4001 7554 $$ NC
Nearby
Areal Flood Warnings in Pennsylvania, 2019Every areal flood warning in 2019
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.