Alert archive / Pennsylvania / River Flood Warnings in 2018

River Flood Warning 50, NWS Philadelphia/Mount Holly

November 3, 2018Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Nov 3, 2018, 1:03 AM EDT for Lehigh County, Pennsylvania. It took effect at Nov 3, 2018, 2:29 AM EDT. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Nov 3, 2018, 1:03 AM EDT (05:03 UTC)
In effect from: Nov 3, 2018, 2:29 AM EDT
Expired: Nov 3, 2018, 6:00 AM EDT
In force: 4 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 05:03 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 7.98 ft at Nov 3, 2018, 4:00 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.

726 
WGUS41 KPHI 030503
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mt Holly NJ
103 AM EDT Sat Nov 3 2018

...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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. The water may be
deeper than you think.

&&

PAC077-031102-
/O.NEW.KPHI.FL.W.0050.181103T0629Z-181103T1517Z/
/APAP1.1.ER.181103T0629Z.181103T0700Z.181103T0917Z.UU/
103 AM EDT Sat Nov 3 2018

The National Weather Service in Mount Holly NJ has issued a 

* Flood Warning for 
  The Little Lehigh at Allentown 10th St Bridge.
* Until this morning...or until the warning is cancelled.
* At 12:45 AM Saturday the stage was 6.2 feet.
* Flood stage is 8.0 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage by after midnight this morning and continue 
  to rise to near 8.4 feet by early this morning. The river will fall below flood
  stage by early this morning.
* Impact...At 8.0 feet...Martin Luther King Jr. Drive begins to flood near 
  Lehigh Street.
* Flood history...This crest compares to a previous crest of 8.6 feet on Oct 19 
  1996.  

 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Little Lehigh
  Allentown 10th St Bri  8.0    6.18  Sat 1 AM     8.4    Sat 3 AM 
 
&&
 
LAT...LON 4061 7548 4059 7543 4054 7547 4056 7552
                                      

$$

Robertson

1 follow-up statement

956 
WGUS81 KPHI 031000
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
600 AM EDT Sat Nov 3 2018

...The Flood Warning is cancelled for the following rivers in Pennsylvania...

  Little Lehigh At Allentown 10th St Bridge affecting Lehigh County

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...Do not attempt to drive through flooded areas. The water may be
deeper than you think.

&&

PAC077-031030-
/O.CAN.KPHI.FL.W.0050.000000T0000Z-181103T1517Z/
/APAP1.1.ER.181103T0815Z.181103T0815Z.181103T0815Z.UU/
600 AM EDT Sat Nov 3 2018

The Flood Warning is cancelled for
  The Little Lehigh at Allentown 10th St Bridge.
* At 5:45 AM Saturday the stage was 7.2 feet.
* Flood stage is 8.0 feet.
* Fell below flood stage at 4:15 AM Saturday.
* Forecast...The river will continue to fall to 3.6 feet by tomorrow morning.
* Impact...At 8.0 feet...Martin Luther King Jr. Drive begins to flood near 
  Lehigh Street.
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG  DAY TIME      CREST

Little Lehigh
  Allentown 10th St Bri  8.0    7.24  Sat 6 AM     Falling 
 
&&
 
LAT...LON 4061 7548 4059 7543 4054 7547 4056 7552
                                      

$$

Robertson

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 2, 8:22 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	4 hr
Nov 2, 9:28 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	4 hr
Nov 2, 9:48 PM EDT	Special Weather Statement	PHI	Berks, Chester	27 min
Nov 2, 10:09 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	51 min
Nov 2, 10:32 PM EDT	Tornado Warning	PHI	Berks, Chester, Montgomery	28 min
Nov 2, 10:36 PM EDT	Special Weather Statement	PHI	Northampton	24 min
Nov 2, 10:45 PM EDT	Areal Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	13 hr
Nov 2, 10:47 PM EDT	Tornado Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	43 min
Nov 2, 10:53 PM EDT	Flash Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	4 hr
Nov 2, 10:53 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 1 more	67 min
Nov 2, 11:23 PM EDT	Tornado Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	24 min
Nov 2, 11:25 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Nov 2, 11:49 PM EDT	Tornado Warning	PHI	Bucks	26 min
Nov 2, 11:53 PM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Nov 2, 11:53 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	37 min
Nov 3, 12:20 AM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	4 hr
Nov 3, 1:29 AM EDT	Areal Flood Advisory	PHI	Monroe, Northampton	4 hr
Nov 3, 1:41 AM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Nov 3, 2:03 AM EDT	River Flood Warning	PHI	Chester	6 hr
Nov 3, 2:34 AM EDT	Areal Flood Warning	PHI	Bucks, Northampton	15 hr
Nov 3, 2:40 AM EDT	River Flood Warning	PHI	Montgomery	10 hr
Nov 3, 2:40 AM EDT	River Flood Warning	PHI	Chester, Montgomery, Philadelphia	15 hr
Nov 3, 3:21 AM EDT	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Nov 3, 5:00 AM EDT	River Flood Warning	PHI	Chester, Delaware	6 hr
Nov 3, 7:01 AM EDT	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	5 hr
Nov 3, 11:44 AM EDT	Areal Flood Warning	PHI	Berks, Bucks, Chester, Lehigh, Montgomery, Northampton	8 hr
Nov 3, 5:19 PM EDT	Areal Flood Warning	PHI	Northampton	22 hr

Nearby

River Flood Warnings in Pennsylvania, 2018 Every river flood warning in 2018

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.