Alert archive / Pennsylvania / Flash Flood Warnings in 2019
Flash Flood Warning 15, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 13, 2019, 7:50 PM EDT for Chester County, Delaware County, Pennsylvania; New Castle County, Delaware. It was in force for 4 hr. 5 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 13, 2019, 7:50 PM EDT (23:50 UTC)
- Expired
- Jun 13, 2019, 11:45 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties New Castle County, DE, Chester County, PA, Delaware County, PA
The radar
The Philadelphia radar (KDIX), 101 km from the middle of the area, began a volume at 23:53 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 13, 7:58 PM EDT | FLOOD | Cheyney, PA | FLOODING ALONG DILWORTHTOWN RD BETWEEN WESTOWN RD. AND CREEK RD. FAST MOVING WATER SEEN OVER ROADWAY. 1.62 INCHES OF RAIN IN 45 MINUTES. |
| Jun 13, 7:58 PM EDT | FLASH FLOOD | Cheyney, PA | FLASH FLOODING ALONG DILWORTHTOWN RD BETWEEN WESTOWN RD. AND CREEK RD. FAST MOVING WATER SEEN OVER ROADWAY. 1.62 INCHES OF RAIN IN 45 MINUTES. |
| Jun 13, 8:15 PM EDT | FLASH FLOOD | 1 Nnw Clearview Manor, DE | SOCIAL MEDIA PHOTOS OF WATER OVER TWO FEET DEEP IN SEVERAL RESIDENTIAL AREAS IN THE OVERVIEW GARDENS AREA. TIME ESTIMATED FROM RADAR REPORTS AND SOCIAL MEDIA POSTS. |
| Jun 13, 9:46 PM EDT | COASTAL FLOOD | Wilmington, DE | SOUTH MARKET STREET BRIDGE CLOSED FROM TIDAL FLOODING. |
| Jun 13, 10:15 PM EDT | FLASH FLOOD | Chester Creek Near Ches, PA | THE GAUGE AT CHESTER CREEK NEAR CHESTER REACHED FLOOD STAGE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.8 hours before the alert went out and 184 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
- 24 J/kg
- Mixed-layer CIN
- -197 J/kg
- Mixed-layer LCL
- 521 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
626 WGUS51 KPHI 132350 FFWPHI DEC003-PAC029-045-140345- /O.NEW.KPHI.FF.W.0015.190613T2350Z-190614T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Mount Holly NJ 750 PM EDT Thu Jun 13 2019 The National Weather Service in Mount Holly NJ has issued a * Flash Flood Warning for... Northwestern New Castle County in northern Delaware... Southeastern Chester County in southeastern Pennsylvania... Delaware County in southeastern Pennsylvania... * Until 1145 PM EDT. * At 749 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to two inches of rain have already fallen. Flash flooding is expected to begin shortly in the areas of heaviest rain. * Some locations that could experience flooding include... Wilmington, Westtown, Swarthmore, Elsmere, New Castle, Newport, Arden, Stanton, Cheyney, North Star, Talleyville, Wilmington Manor, Elam, Lima, Pike Creek, Trout Lake, Chelsea, Radnor Township, Ashland and Gradyville. Additional rainfall amounts of up to one inch are possible in the warned area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Please report flooding to your local law enforcement agency when you can do so safely. A Flash Flood Warning means that flooding is imminent or occurring. If you are in the warned area move to higher ground immediately. Residents living along streams and creeks should take immediate precautions to protect life and property. && LAT...LON 3975 7579 4008 7546 3998 7528 3964 7562 $$ MPS
2 follow-up statements
329 WGUS71 KPHI 140206 FFSPHI Flash Flood Statement National Weather Service Mount Holly NJ 1006 PM EDT Thu Jun 13 2019 DEC003-PAC029-045-140345- /O.CON.KPHI.FF.W.0015.000000T0000Z-190614T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle DE-Chester PA-Delaware PA- 1006 PM EDT Thu Jun 13 2019 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT FOR NORTHWESTERN NEW CASTLE...SOUTHEASTERN CHESTER AND DELAWARE COUNTIES... At 1005 PM EDT, Doppler radar indicated heavy rain fell across the warned area earlier this evening, resulting in up to two inches of rain. Flash flooding is already occurring. Some locations that could experience flooding include... Wilmington, Westtown, Swarthmore, Elsmere, New Castle, Newport, Arden, Stanton, Cheyney, North Star, Talleyville, Wilmington Manor, Elam, Lima, Pike Creek, Trout Lake, Chelsea, Radnor Township, Ashland and Gradyville. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots. Please report flooding to your local law enforcement agency when you can do so safely. A Flash Flood Warning means that flooding is imminent or occurring. If you are in the warned area move to higher ground immediately. Residents living along streams and creeks should take immediate precautions to protect life and property. && LAT...LON 3975 7579 4008 7546 3998 7528 3964 7562 $$ MPS
357 WGUS71 KPHI 140343 FFSPHI Flash Flood Statement National Weather Service Mount Holly NJ 1143 PM EDT Thu Jun 13 2019 DEC003-PAC029-045-140352- /O.EXP.KPHI.FF.W.0015.000000T0000Z-190614T0345Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle DE-Chester PA-Delaware PA- 1143 PM EDT Thu Jun 13 2019 ...THE FLASH FLOOD WARNING FOR NORTHWESTERN NEW CASTLE...SOUTHEASTERN CHESTER AND DELAWARE COUNTIES WILL EXPIRE AT 1145 PM EDT... The heavy rain has ended and flood waters continue to recede. However, a flood warning remains for Chester Creek near Chester. Please continue to heed any road closures. LAT...LON 3975 7579 4008 7546 3998 7528 3964 7562 $$ Robertson
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 5:08 AM EDT | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jun 13, 7:25 AM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery, Philadelphia | 3 hr |
| Jun 13, 7:24 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jun 13, 7:44 PM EDT | Special Weather Statement | PHI | Delaware | 31 min |
| Jun 13, 5:58 AM EDT | Areal Flood Advisory | PHI | Kent, New Castle, Sussex | 3 hr |
| Jun 13, 7:10 PM EDT | Special Weather Statement | PHI | New Castle | 50 min |
| Jun 13, 7:41 PM EDT | Special Weather Statement | PHI | Sussex | 49 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2019Flash Flood Warnings in Delaware, 2019Every flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.