Alert archive / Pennsylvania / River Flood Warnings in 2018

River Flood Warning 99, NWS Philadelphia/Mount Holly

December 21, 2018Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Dec 21, 2018, 8:51 AM EST for Bucks County, Pennsylvania. It took effect at Dec 21, 2018, 11:27 AM EST. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Dec 21, 2018, 8:51 AM EST (13:51 UTC)
In effect from
Dec 21, 2018, 11:27 AM EST
Expired
Dec 21, 2018, 2:46 PM EST
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
Minor

County Bucks County, PA

The radar

The Philadelphia radar (KDIX), 49 km from the middle of the area, began a volume at 13:50 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 Neshaminy Creek near Langhorne (LNGP1). The gauge peaked at 8.71 ft at Dec 21, 2018, 11:00 AM EST.

actionminormoderate51012/2112/22
Action stage
8 ft
Minor stage
9 ft
Moderate stage
12 ft
Major stage
14 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01465500, 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.

593 
WGUS41 KPHI 211351
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mt Holly NJ
851 AM EST Fri Dec 21 2018

...The National Weather Service in Mount Holly NJ has issued a 
flood warning for the following rivers in Pennsylvania...

  Neshaminy Creek At Langhorne affecting Bucks County

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC017-211951-
/O.NEW.KPHI.FL.W.0099.181221T1627Z-181222T0300Z/
/LNGP1.1.ER.181221T1627Z.181221T1800Z.181221T2100Z.NO/
851 AM EST Fri Dec 21 2018

The National Weather Service in Mount Holly NJ has issued a 

* Flood Warning for 
  The Neshaminy Creek at Langhorne.
* until this evening...or until the warning is cancelled.
* At 8:39 AM Friday the stage was 8.1 feet.
* Flood stage is 9.0 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage this morning and continue 
  to rise to near 9.5 feet early this afternoon. The river will 
  fall below flood stage late this afternoon.
* Impact...At 9.0 feet...Flooding begins on Bridle Drive in 
  Middletown Township.
* Flood history...This crest compares to a previous crest of 9.7
  feet on Mar 7 2011.  
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG   DAY TIME     CREST

Neshaminy Creek
  Langhorne              9.0    8.09  Fri 9 AM     9.5    Fri 1 PM 
 
&&
 
LAT...LON 4019 7498 4020 7491 4008 7486 4006 7493
                                      

$$

Kruzdlo
1 follow-up statement
007 
WGUS81 KPHI 211946
FLSPHI
Flood Statement
National Weather Service Mt Holly NJ
246 PM EST Fri Dec 21 2018

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

  Neshaminy Creek At Langhorne affecting Bucks County

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

PAC017-212016-
/O.CAN.KPHI.FL.W.0099.000000T0000Z-181222T0300Z/
/LNGP1.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
246 PM EST Fri Dec 21 2018

The Flood Warning is cancelled for
  The Neshaminy Creek at Langhorne.
* At 2:15 PM Friday the stage was 8.3 feet.
* Flood stage is 9.0 feet.
* Forecast...The river crested below flood stage at 8.7 feet. 
 
&&

                         FLD    OBSERVED           FORECAST
 LOCATION                STG    STG   DAY TIME     CREST

Neshaminy Creek
  Langhorne              9.0    8.31  Fri 2 PM     Crested and falling 
 
&&
 
LAT...LON 4019 7498 4020 7491 4008 7486 4006 7493
                                      

$$

Kruzdlo

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 21, 3:44 AM ESTRiver Flood WarningPHIChester9 hr
Dec 21, 4:02 AM ESTAreal Flood WarningPHIBerks, Chester, Delaware, Montgomery, Philadelphia4 hr
Dec 21, 4:09 AM ESTAreal Flood WarningPHIBucks, Lehigh, Northampton16 hr
Dec 21, 4:27 AM ESTAreal Flood WarningPHIBerks, Carbon, Lehigh, Monroe, Northampton8 hr
Dec 21, 4:36 AM ESTAreal Flood WarningPHIBucks, Montgomery, Philadelphia7 hr
Dec 21, 5:10 AM ESTRiver Flood WarningPHIDelaware5 hr
Dec 21, 5:20 AM ESTRiver Flood WarningPHIChester, Delaware14 hr
Dec 21, 8:04 AM ESTAreal Flood WarningPHIBerks, Chester, Delaware, Montgomery, Philadelphia7 hr
Dec 21, 12:15 PM ESTAreal Flood WarningPHIBerks, Carbon, Lehigh, Monroe, Northampton4 hr

Nearby

River Flood Warnings in Pennsylvania, 2018Every 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.