Alert archive / Pennsylvania / Flash Flood Warnings in 2017
Flash Flood Warning 7, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 1, 2017, 4:20 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 4 hr. 6 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
- Jul 1, 2017, 4:20 PM EDT (20:20 UTC)
- Expired
- Jul 1, 2017, 8:15 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Berks County, PA, Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 124 km from the middle of the area, began a volume at 20:24 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 |
|---|---|---|---|
| Jul 1, 4:46 PM EDT | FLASH FLOOD | Crackersport, PA | HIGH WATER RESCUE IN HOTEL PARKING LOT ON BULLDOG DRIVE IN SOUTH WHITEHALL TOWNSHIP |
| Jul 1, 5:04 PM EDT | FLASH FLOOD | Emmaus Junction, PA | HIGH WATER RESCUE NEAR INTERSECTION OF LEHIGH ST AND 33RD ST |
| Jul 1, 5:10 PM EDT | HEAVY RAIN 2.25 | Lower Macungie Twp, PA | 2.25 INCHES OF RAIN FELL IN JUST UNDER 30 MINUTES. |
| Jul 1, 5:15 PM EDT | HEAVY RAIN 2.56 | 1 Sse New Smithville, PA | 2.43 INCHES OF RAIN FELL IN 30-MIN PERIOD ENDING 425 PM |
| Jul 1, 5:20 PM EDT | FLOOD | Mertztown, PA | ROAD FLOODED NEAR THE INTERSECTION OF MEADOW DRIVE AND PARK AVE IN MERTZTOWN. |
| Jul 1, 5:30 PM EDT | FLOOD | Lower Macungie Twp, PA | LOCALIZED FLOODING ALONG LITTLE LEHIGH CREEK NEAR ANCIENT OAKS. WATER REPORTED IN SOME BUSINESSES ALONG HAMILTON BLVD. |
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, 8.3 hours before the alert went out and 233 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
- 160 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 564 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
290 WGUS51 KPHI 012020 FFWPHI PAC011-077-020015- /O.NEW.KPHI.FF.W.0007.170701T2020Z-170702T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Mount Holly NJ 420 PM EDT SAT JUL 1 2017 The National Weather Service in Mount Holly NJ has issued a * Flash Flood Warning for... Northeastern Berks County in eastern Pennsylvania... Central Lehigh County in eastern Pennsylvania... * Until 815 PM EDT * At 419 PM EDT...Doppler radar indicated thunderstorms producing heavy rain across the warned area. Radar has indicated up to two inches of rain have already fallen. Flash flooding is expected to begin shortly. * Some locations that will experience flooding include... Allentown, Emmaus, Kutztown, Fleetwood, Topton, Lyons, Neffs, Coffeetown, Ancient Oaks, Emerald, Schnecksville, Claussville, Macungie, Alburtis and Fullerton. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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 4056 7542 4037 7575 4052 7595 4075 7563 $$ MPS
2 follow-up statements
285 WGUS71 KPHI 012209 FFSPHI Flash Flood Statement National Weather Service Mount Holly NJ 609 PM EDT SAT JUL 1 2017 PAC011-077-020015- /O.CON.KPHI.FF.W.0007.000000T0000Z-170702T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Berks PA-Lehigh PA- 609 PM EDT SAT JUL 1 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM EDT FOR NORTHEASTERN BERKS AND CENTRAL LEHIGH COUNTIES... At 607 PM EDT...Doppler radar indicated heavy rain has moved out of the warned area. However, flash flooding is occurring across the warned area. Some locations that will experience flooding include... Allentown, Emmaus, Kutztown, Fleetwood, Topton, Lyons, Neffs, Coffeetown, Ancient Oaks, Emerald, Schnecksville, Claussville, Macungie, Alburtis and Fullerton. PRECAUTIONARY/PREPAREDNESS ACTIONS... Stay away or be swept away. River banks and culverts can become unstable and unsafe. Please report flooding to your local law enforcement agency when you can do so safely. && LAT...LON 4056 7542 4037 7575 4052 7595 4075 7563 $$ MPS
157 WGUS71 KPHI 020007 FFSPHI Flash Flood Statement National Weather Service Mount Holly NJ 807 PM EDT SAT JUL 1 2017 PAC011-077-020017- /O.EXP.KPHI.FF.W.0007.000000T0000Z-170702T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Berks PA-Lehigh PA- 807 PM EDT SAT JUL 1 2017 ...THE FLASH FLOOD WARNING FOR NORTHEASTERN BERKS AND CENTRAL LEHIGH COUNTIES WILL EXPIRE AT 815 PM EDT... Flood waters have receded. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 4056 7542 4037 7575 4052 7595 4075 7563 $$ SFJ
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 8:09 PM EDT | Special Weather Statement | PHI | Montgomery | 51 min |
| Jun 30, 8:32 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Lehigh, Montgomery | 118 min |
| Jun 30, 9:17 PM EDT | Special Weather Statement | PHI | Bucks | 43 min |
| Jul 1, 2:38 PM EDT | Special Weather Statement | PHI | Berks | 52 min |
| Jul 1, 3:22 PM EDT | Special Weather Statement | PHI | Berks, Carbon | 23 min |
| Jul 1, 3:24 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 3 hr |
| Jul 1, 3:41 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Northampton | 49 min |
| Jul 1, 4:05 PM EDT | Special Weather Statement | PHI | Chester | 40 min |
| Jul 1, 4:24 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery, Northampton | 51 min |
| Jul 1, 5:00 PM EDT | Areal Flood Advisory | PHI | Bucks, Lehigh, Northampton | 4 hr |
| Jul 1, 5:01 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 44 min |
| Jul 1, 5:08 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Montgomery, Northampton | 52 min |
| Jul 1, 5:30 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 1, 5:35 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 40 min |
| Jul 1, 5:50 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 40 min |
| Jul 1, 6:17 PM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 4 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2017Every flash 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.