Alert archive / Pennsylvania / River Flood Warnings in 2021
River Flood Warning 57, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this river flood warning at Sep 1, 2021, 8:29 PM EDT for Lehigh County, Pennsylvania. It took effect at Sep 1, 2021, 9:39 PM EDT. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 1, 2021, 8:29 PM EDT (00:29 UTC)
- In effect from
- Sep 1, 2021, 9:39 PM EDT
- Expired
- Sep 2, 2021, 6:38 AM EDT
- In force
- 9 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- Minor
County Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 115 km from the middle of the area, began a volume at 00:28 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 Little Lehigh Creek at Allentown (APAP1). The gauge peaked at 9.57 ft at Sep 2, 2021, 12:00 AM EDT.
- Action stage
- 6 ft
- Minor stage
- 8 ft
- Moderate stage
- 10 ft
- Major stage
- 12 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 01451650, 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.
544 WGUS41 KPHI 020029 FLWPHI BULLETIN - IMMEDIATE BROADCAST REQUESTED Flood Warning National Weather Service Mount Holly NJ 829 PM EDT Wed Sep 1 2021 ...The National Weather Service in Mount Holly NJ has issued a Flood Warning for the following rivers in Pennsylvania... Little Lehigh At Allentown 10th St Bridge affecting Lehigh County. For the Little Lehigh...including Allentown 10th St Bridge...Minor flooding is forecast. PRECAUTIONARY/PREPAREDNESS ACTIONS... Motorists should not attempt to drive around barricades or drive cars through flooded areas. Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov/phi. PAC077-020915- /O.NEW.KPHI.FL.W.0057.210902T0139Z-210902T0903Z/ /APAP1.1.ER.210902T0139Z.210902T0200Z.210902T0302Z.NO/ 829 PM EDT Wed Sep 1 2021 The National Weather Service in Mount Holly has issued a * Flood Warning for the Little Lehigh At Allentown 10th St Bridge. * Until late tonight. * At 8:17 PM EDT Wednesday the stage was 6.3 feet. * Flood stage is 8.0 feet. * Minor flooding is forecast. * Forecast...The river is expected to rise above flood stage late this evening to a crest of 8.2 feet late this evening. It will then fall below flood stage tonight. * Impact...At 6.0 feet, Fountain Park begins to flood. * Impact...At 7.0 feet, The Fountain Park pathway floods. * Impact...At 8.0 feet, Martin Luther King Jr. Drive begins to flood near Lehigh Street. * Impact...At 9.0 feet, Fish Hatchery Road is flooded. * Flood History...This crest compares to a previous crest of 8.1 feet on 09/16/1999. && Fld Observed Forecasts (8 pm EDT) Location Stg Stg Day/Time Thu Fri Sat Little Lehigh Allentown 10th St Bridg 8.0 6.3 Wed 8 pm EDT 3.3 MSG MSG && LAT...LON 4061 7548 4059 7543 4054 7547 4056 7552 $$ NC
2 follow-up statements
597 WGUS81 KPHI 020324 FLSPHI Flood Statement National Weather Service Mount Holly NJ 1124 PM EDT Wed Sep 1 2021 ...The Flood Warning is extended for the following rivers in Pennsylvania... Little Lehigh At Allentown 10th St Bridge affecting Lehigh County. For the Little Lehigh...including Allentown 10th St Bridge...Minor flooding is forecast. PRECAUTIONARY/PREPAREDNESS ACTIONS... Motorists should not attempt to drive around barricades or drive cars through flooded areas. Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov/phi. PAC077-021045- /O.EXT.KPHI.FL.W.0057.000000T0000Z-210902T1043Z/ /APAP1.1.ER.210902T0147Z.210902T0400Z.210902T0443Z.NO/ 1124 PM EDT Wed Sep 1 2021 ...The Flood Warning is now in effect until tomorrow morning... The Flood Warning continues for the Little Lehigh At Allentown 10th St Bridge. * Until Thursday morning. * At 10:45 PM EDT Wednesday 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 10:45 PM EDT Wednesday was 9.2 feet. * Forecast...The river will fall below flood stage just after midnight tonight to 3.1 feet and then begin rising early Friday morning. It will then rise again to 3.2 feet Friday morning. It will fall to 3.0 feet and then begin rising late Friday morning then rise again. * Impact...At 6.0 feet, Fountain Park begins to flood. * Impact...At 7.0 feet, The Fountain Park pathway floods. * Impact...At 8.0 feet, Martin Luther King Jr. Drive begins to flood near Lehigh Street. * Impact...At 9.0 feet, Fish Hatchery Road is flooded. * Impact...At 10.0 feet, Water is several feet deep on Martin Luther King Jr. Drive near Lehigh Street. Businesses are flooded. * Flood History...This crest compares to a previous crest of 9.9 feet on 08/28/2011. && Fld Observed Forecasts (11 pm EDT) Location Stg Stg Day/Time Thu Fri Sat Little Lehigh Allentown 10th St Bridg 8.0 9.2 Wed 10 pm ED 3.1 MSG MSG && LAT...LON 4061 7548 4059 7543 4054 7547 4056 7552 $$ Meola
683 WGUS81 KPHI 021038 FLSPHI Flood Statement National Weather Service Mount Holly NJ 638 AM EDT Thu Sep 2 2021 ...The Flood Warning is cancelled for the following rivers in Pennsylvania... Little Lehigh At Allentown 10th St Bridge affecting Lehigh County. PAC077-021145- /O.CAN.KPHI.FL.W.0057.000000T0000Z-210902T1038Z/ /APAP1.1.ER.210902T0147Z.210902T0330Z.210902T0656Z.NO/ 638 AM EDT Thu Sep 2 2021 ...The Flood Warning for the Little Lehigh At Allentown 10th St Bridge has been cancelled... The Flood Warning is cancelled for the Little Lehigh At Allentown 10th St Bridge. * At 5:45 AM EDT Thursday the stage was 6.9 feet. * Flood stage is 8.0 feet. * Forecast...The river will oscillate this morning before falling this afternoon. Additional flood warnings are in place for the region. && Fld Observed Forecasts (7 am EDT) Location Stg Stg Day/Time Fri Sat Sun Little Lehigh Allentown 10th St Bridg 8.0 6.9 Thu 5 am EDT 3.1 MSG MSG && LAT...LON 4061 7548 4059 7543 4054 7547 4056 7552 $$ Kruzdlo
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 9:47 PM EDT | River Flood Warning | PHI | Berks | 18 hr |
| Sep 1, 10:24 PM EDT | Flash Flood Warning | PHI | Bucks, Philadelphia | 4 hr |
| Sep 1, 10:29 PM EDT | River Flood Warning | PHI | Bucks | 49 hr |
| Sep 1, 10:32 PM EDT | River Flood Warning | PHI | Bucks | 31 hr |
| Sep 1, 10:42 PM EDT | Areal Flood Warning | PHI | Berks, Bucks, Montgomery | 12 hr |
| Sep 1, 10:47 PM EDT | Areal Flood Warning | PHI | Bucks, Carbon, Lehigh, Northampton | 23 hr |
| Sep 1, 10:52 PM EDT | Areal Flood Warning | PHI | Bucks | 12 hr |
| Sep 1, 11:38 PM EDT | Areal Flood Warning | PHI | Berks, Chester, Delaware, Montgomery | 10 hr |
| Sep 2, 12:01 AM EDT | Areal Flood Warning | PHI | Monroe, Northampton | 40 hr |
| Sep 2, 2:23 AM EDT | Areal Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 9 hr |
| Sep 2, 2:29 AM EDT | Areal Flood Warning | PHI | Bucks, Philadelphia | 5 hr |
| Sep 2, 2:41 AM EDT | Areal Flood Warning | PHI | Bucks | 14 hr |
| Sep 2, 3:52 AM EDT | Areal Flood Warning | PHI | Bucks | 8 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Bucks | 37 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Northampton | 37 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Bucks | 37 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Bucks | 33 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Bucks | 34 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Monroe, Northampton | 5 hr |
| Sep 2, 5:02 AM EDT | River Flood Warning | PHI | Lehigh | 11 hr |
| Sep 2, 6:05 AM EDT | Coastal Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 6 hr |
| Sep 2, 6:44 PM EDT | Coastal Flood Advisory | PHI | Bucks, Delaware, Philadelphia | 7 hr |
Nearby
River Flood Warnings in Pennsylvania, 2021Every river flood warning in 2021
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.