Alert archive / Pennsylvania / River Flood Warnings in 2020
River Flood Warning 61, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this river flood warning at Dec 25, 2020, 4:00 AM EST for Lehigh County, Northampton County, Pennsylvania. It took effect at Dec 25, 2020, 5:12 AM EST. It was in force for 15 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 25, 2020, 4:00 AM EST (09:00 UTC)
- In effect from
- Dec 25, 2020, 5:12 AM EST
- Expired
- Dec 25, 2020, 7:59 PM EST
- In force
- 15 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- Minor
Counties Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 129 km from the middle of the area, began a volume at 09:02 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 river
Written for the forecast point Lehigh River at Walnutport (WNTP1). The gauge peaked at 9.40 ft at Dec 25, 2020, 10:00 AM EST.
- Action stage
- 7.5 ft
- Minor stage
- 8 ft
- Moderate stage
- 12 ft
- Major stage
- 16 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 01451000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
The text
As transmitted.
110 WGUS41 KPHI 250900 FLWPHI BULLETIN - EAS ACTIVATION REQUESTED Flood Warning National Weather Service Mount Holly NJ 400 AM EST Fri Dec 25 2020 ...The National Weather Service in Mount Holly NJ has issued a Flood Warning for the following rivers in Pennsylvania... Lehigh River At Walnutport affecting Lehigh and Northampton Counties. For the Lehigh River...including Walnutport...Minor flooding is forecast. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov/phi. PAC077-095-252100- /O.NEW.KPHI.FL.W.0061.201225T1012Z-201225T2230Z/ /WNTP1.1.ER.201225T1012Z.201225T1200Z.201225T1617Z.NO/ 400 AM EST Fri Dec 25 2020 The National Weather Service in Mount Holly has issued a * Flood Warning for the Lehigh River At Walnutport. * Until this afternoon. * At 3:45 AM EST Friday the stage was 7.6 feet. * Flood stage is 8.0 feet. * Minor flooding is forecast. * Forecast...The river is expected to rise above flood stage early this morning to a crest of 8.5 feet around daybreak. It will then fall below flood stage late this morning. * Impact at 6.0 feet...Minor flooding begins downstream at Catasaqua and Hokendaqua. * Flood History...This crest compares to a previous crest of 8.8 feet on 09/09/2011. && Stream Fld Observed Fcsts (1 am) Crest Location Stg Stg Day/Time Sat Sun Stg Time Date Lehigh River Walnutport 8.0 7.6 Fri 3 am 6.1 5.0 8.5 7am 12/25 && LAT...LON 4077 7563 4081 7559 4064 7542 4059 7545 $$ CMS
3 follow-up statements
912 WGUS81 KPHI 251753 FLSPHI Flood Statement National Weather Service Mount Holly NJ 1253 PM EST Fri Dec 25 2020 ...The Flood Warning continues for the following rivers in Pennsylvania... Lehigh River At Walnutport affecting Lehigh and Northampton Counties. For the Lehigh River...including Walnutport...Minor flooding is forecast. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov/phi. PAC077-095-252230- /O.CON.KPHI.FL.W.0061.000000T0000Z-201225T2230Z/ /WNTP1.1.ER.201225T0933Z.201225T1500Z.201225T2100Z.NO/ 1253 PM EST Fri Dec 25 2020 ...The Flood Warning remains in effect... The Flood Warning continues for the Lehigh River At Walnutport. * Until this afternoon. * At 12:31 PM EST Friday the stage was 9.2 feet. * Flood stage is 8.0 feet. * Minor flooding is occurring and minor flooding is forecast. * Recent Activity...The maximum river stage in the 24 hours ending at 12:31 PM EST Friday was 9.4 feet. * Forecast...The river is expected to fall below flood stage late this afternoon and continue falling to 4.3 feet Monday morning. * Impact at 6.0 feet...Minor flooding begins downstream at Catasaqua and Hokendaqua. * Flood History...This crest compares to a previous crest of 9.1 feet on 10/01/2010. && Stream Fld Observed Fcsts (1 pm) Crest Location Stg Stg Day/Time Sat Sun Stg Time Date Lehigh River Walnutport 8.0 9.2 Fri 12 p 5.5 4.6 Crested && LAT...LON 4077 7563 4081 7559 4064 7542 4059 7545 $$ Kruzdlo
982 WGUS81 KPHI 252207 FLSPHI Flood Statement National Weather Service Mount Holly NJ 507 PM EST Fri Dec 25 2020 ...The Flood Warning is extended for the following river in Pennsylvania... Lehigh River At Walnutport affecting Lehigh and Northampton Counties. PRECAUTIONARY/PREPAREDNESS ACTIONS... Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov/phi. PAC077-095-260300- /O.EXT.KPHI.FL.W.0061.000000T0000Z-201226T0300Z/ /WNTP1.1.ER.201225T0933Z.201225T1500Z.201225T2302Z.NO/ 507 PM EST Fri Dec 25 2020 ...The Flood Warning is now in effect until late this evening... The Flood Warning continues for the Lehigh River At Walnutport. * Until this evening. * At 4:45 PM EST Friday the stage was 8.7 feet. * Flood stage is 8.0 feet. * Minor flooding is occurring. * Recent Activity...The maximum river stage in the 24 hours ending at 4:45 PM EST Friday was 9.4 feet. * Forecast...The river is expected to fall below flood stage this evening and continue falling. * Impact at 6.0 feet...Minor flooding occurs downstream at Catasaqua and Hokendaqua. * Flood History...This crest compares to a previous crest of 8.8 feet on 09/09/2011. && Stream Fld Observed Fcsts (7 pm) Crest Location Stg Stg Day/Time Sat Sun Stg Time Date Lehigh River Walnutport 8.0 8.7 Fri 4 pm 5.2 4.5 Crested && LAT...LON 4077 7563 4081 7559 4064 7542 4059 7545 $$ Iovino
205 WGUS81 KPHI 260059 FLSPHI Flood Statement National Weather Service Mount Holly NJ 759 PM EST Fri Dec 25 2020 ...The Flood Warning is cancelled for the following river in Pennsylvania... Lehigh River At Walnutport affecting Lehigh and Northampton Counties. PAC077-095-260200- /O.CAN.KPHI.FL.W.0061.000000T0000Z-201226T0059Z/ /WNTP1.1.ER.201225T0933Z.201225T1500Z.201225T2302Z.NO/ 759 PM EST Fri Dec 25 2020 ...The Flood Warning for the Lehigh River At Walnutport has been cancelled... The Flood Warning is cancelled for the Lehigh River At Walnutport. * At 7:46 PM EST Friday the stage was 7.97 feet. * Flood stage is 8.0 feet. * Forecast...The river level will continue to fall. && Stream Fld Observed Fcsts (7 pm) Crest Location Stg Stg Day/Time Sat Sun Stg Time Date Lehigh River Walnutport 8.0 7.97 Fri 7 pm 5.2 4.5 Crested && LAT...LON 4077 7563 4081 7559 4064 7542 4059 7545 $$ Iovino
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 24, 8:47 PM EST | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 6 hr |
| Dec 24, 9:08 PM EST | Coastal Flood Advisory | PHI | Bucks, Philadelphia | 14 hr |
| Dec 24, 9:16 PM EST | Areal Flood Advisory | PHI | Bucks, Lehigh, Northampton | 3 hr |
| Dec 24, 9:38 PM EST | Areal Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 14 hr |
| Dec 24, 10:09 PM EST | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 6 hr |
| Dec 24, 10:21 PM EST | Areal Flood Warning | PHI | Bucks | 14 hr |
| Dec 24, 10:30 PM EST | River Flood Warning | PHI | Delaware | 10 hr |
| Dec 24, 11:10 PM EST | Areal Flood Advisory | PHI | Bucks | 4 hr |
| Dec 24, 11:26 PM EST | River Flood Warning | PHI | Chester | 13 hr |
| Dec 24, 11:48 PM EST | Areal Flood Warning | PHI | Bucks | 15 hr |
| Dec 24, 11:54 PM EST | Areal Flood Warning | PHI | Lehigh, Monroe, Northampton | 12 hr |
| Dec 25, 12:36 AM EST | River Flood Warning | PHI | Montgomery | 13 hr |
| Dec 25, 12:53 AM EST | Areal Flood Warning | PHI | Chester | 6 hr |
| Dec 25, 12:59 AM EST | River Flood Warning | PHI | Chester, Montgomery, Philadelphia | 21 hr |
| Dec 25, 1:56 AM EST | Areal Flood Warning | PHI | Bucks, Philadelphia | 7 hr |
| Dec 25, 2:28 AM EST | River Flood Warning | PHI | Bucks | 15 hr |
| Dec 25, 3:29 AM EST | Areal Flood Warning | PHI | Berks | 6 hr |
| Dec 25, 3:33 AM EST | River Flood Warning | PHI | Chester, Delaware | 17 hr |
| Dec 25, 4:31 AM EST | Areal Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 7 hr |
| Dec 25, 4:53 AM EST | River Flood Warning | PHI | Berks, Montgomery | 9 hr |
| Dec 25, 6:32 AM EST | River Flood Warning | PHI | Montgomery, Philadelphia | 7 hr |
| Dec 25, 7:28 AM EST | River Flood Warning | PHI | Monroe | 10 hr |
| Dec 25, 12:13 PM EST | Areal Flood Warning | PHI | Carbon, Monroe | 9 hr |
Nearby
River Flood Warnings in Pennsylvania, 2020Every river flood warning in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.