Alert archive / Pennsylvania / Areal Flood Warnings in 2011
Areal Flood Warning 79, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood warning at Sep 8, 2011, 12:13 AM EDT for Berks County, Pennsylvania. It was in force for 24 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 8, 2011, 12:13 AM EDT (04:13 UTC)
- Expired
- Sep 9, 2011, 12:28 AM EDT
- In force
- 24 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 160 km from the middle of the area, began a volume at 04:16 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 nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 4.2 hours before the alert went out and 208 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
- 36 J/kg
- Mixed-layer CIN
- -101 J/kg
- Mixed-layer LCL
- 504 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
286
WGUS41 KPHI 080413
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1213 AM EDT THU SEP 8 2011
PAC011-081015-
/O.NEW.KPHI.FA.W.0079.110908T0413Z-110908T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-
1213 AM EDT THU SEP 8 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLOOD WARNING FOR SMALL STREAMS IN...
WESTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 615 AM EDT
* AT 1208 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN...FALLING AT THE RATE OF ONE TO TWO INCHES PER
HOUR...IN THE FAR NORTHWESTERN PORTION OF BERKS COUNTY. WITH THE
GROUND ALREADY SATURATED FROM EARLIER RAIN...MUCH OF THIS
PRECIPITATION WILL RUNOFF AND COLLECT IN SMALLS STREAMS AND LOW
LYING AREAS. THIS WILL JUST ADD TO ALREADY OCCURRING FLOODING
ISSUES.
THIS AREAL FLOOD WARNING REPLACES THE FLASH FLOOD WARNING THAT WAS
ISSUED EARLIER FOR THE SAME AREA.
A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS IMMEDIATELY.
LAT...LON 4053 7632 4052 7630 4054 7618 4056 7615
4058 7609 4060 7605 4059 7603 4064 7601
4068 7591 4067 7588 4015 7589 4049 7642
$$
JJM4 follow-up statements
487
WGUS41 KPHI 081002
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
602 AM EDT THU SEP 8 2011
PAC011-081815-
/O.EXT.KPHI.FA.W.0079.000000T0000Z-110908T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-
602 AM EDT THU SEP 8 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLOOD WARNING FOR SMALL STREAMS IN...
WESTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 215 PM EDT THURSDAY
* AT 600 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR
INDICATED MORE RAIN WAS MOVING IN FROM THE WEST. WITH THE GROUND
ALREADY SATURATED FROM EARLIER RAIN...THE RAINFALL RUNOFF PROCESS
IS EXTREMELY EFFICIENT. RENEWED FLOODING ON ROADWAYS...IN
POOR DRAINAGE AREAS...AND ALONG SMALL STREAMS...CAN BE EXPECTED.
A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
STREAM RISES WILL BE SLOW AND FLASH FLOODING IS NOT EXPECTED.
HOWEVER...ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS
IMMEDIATELY.
LAT...LON 4053 7632 4052 7630 4054 7618 4056 7615
4058 7609 4060 7605 4059 7603 4064 7601
4068 7591 4067 7588 4015 7589 4049 7642
$$
JJM732
WGUS41 KPHI 081803
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
203 PM EDT THU SEP 8 2011
PAC011-090215-
/O.EXT.KPHI.FA.W.0079.000000T0000Z-110909T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-
203 PM EDT THU SEP 8 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLOOD WARNING FOR SMALL STREAMS IN...
WESTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 1015 PM EDT
* AT 155 PM EDT...ALTHOUGH RAINS HAVE BECOME MORE SPORADIC THIS
AFTERNOON...CREEKS AND STREAMS REMAINED VERY HIGH ACROSS PORTIONS OF
THE WARNED AREA. SINCE THE RAINS BEGAN ON MONDAY, 7.00 TO 9.00
INCHES OF RAIN HAVE FALLEN. THE FLOOD WARNING HAS BEEN EXTENDED.
LAT...LON 4053 7632 4052 7630 4054 7618 4056 7615
4058 7609 4060 7605 4059 7603 4064 7601
4068 7591 4067 7588 4015 7589 4049 7642
$$
KRUZDLO962
WGUS41 KPHI 090117
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
917 PM EDT THU SEP 8 2011
PAC011-090815-
/O.EXT.KPHI.FA.W.0079.000000T0000Z-110909T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-
917 PM EDT THU SEP 8 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE
* FLOOD WARNING FOR SMALL STREAMS IN...
WESTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 415 AM EDT FRIDAY
* WHILE THE HEAVIEST RAIN HAS MOVED OUT OF THE AREA...SMALL STREAMS
AND CREEKS CONTINUE TO RISE FROM EARLIER HEAVY RAIN. THE RISES
COULD RESULT IN ADDITIONAL FLOODING THROUGH THE OVERNIGHT HOURS.
A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
STREAM RISES WILL BE SLOW AND FLASH FLOODING IS NOT EXPECTED.
HOWEVER...ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS
IMMEDIATELY.
LAT...LON 4053 7632 4052 7630 4054 7618 4056 7615
4058 7609 4060 7605 4059 7603 4064 7601
4068 7591 4067 7588 4015 7589 4049 7642
$$
HAYES331
WGUS81 KPHI 090428
FLSPHI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1228 AM EDT FRI SEP 9 2011
PAC011-090436-
/O.CAN.KPHI.FA.W.0079.000000T0000Z-110909T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-
1228 AM EDT FRI SEP 9 2011
...THE FLOOD WARNING HAS BEEN CANCELLED FOR SMALL STREAMS IN WESTERN
BERKS COUNTY...
SMALL STREAMS HAVE NOW RETURNED TO THEIR BANKS AFTER MAJOR RISES
TOOK PLACE FROM HEAVY RAIN THE PAST FEW DAYS. THE FLOOD WARNING HAS
THEREFORE BEEN CANCELLED.
FLOOD WARNINGS REMAIN IN EFFECT FOR THE SCHUYLKILL RIVER, WHICH IS
EXPECTED TO CREST AT PHILADELPHIA LATER FRIDAY MORNING.
LAT...LON 4053 7632 4052 7630 4054 7618 4056 7615
4058 7609 4060 7605 4059 7603 4064 7601
4068 7591 4067 7588 4015 7589 4049 7642
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 8:11 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Sep 7, 8:24 PM EDT | Areal Flood Warning | PHI | Montgomery | 6 hr |
| Sep 7, 9:32 PM EDT | Special Weather Statement | PHI | Berks | 118 min |
| Sep 7, 9:38 PM EDT | River Flood Warning | PHI | Montgomery | 13 hr |
| Sep 7, 11:32 PM EDT | Areal Flood Advisory | PHI | Bucks, Carbon, Lehigh, Monroe, Northampton | 3 hr |
| Sep 8, 1:25 AM EDT | Flash Flood Warning | PHI | Delaware, Montgomery, Philadelphia | 7 hr |
| Sep 8, 2:26 AM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 6 hr |
| Sep 8, 3:15 AM EDT | Flash Flood Warning | PHI | Lehigh, Monroe, Northampton | 6 hr |
| Sep 8, 3:41 AM EDT | River Flood Warning | PHI | Lehigh, Northampton | 7 hr |
| Sep 8, 3:49 AM EDT | River Flood Warning | PHI | Monroe | 7 hr |
| Sep 8, 5:30 AM EDT | Coastal Flood Watch | PHI | Delaware, Philadelphia | 6 hr |
| Sep 8, 5:30 AM EDT | Coastal Flood Advisory | PHI | Delaware, Philadelphia | 8 hr |
| Sep 8, 5:48 AM EDT | River Flood Warning | PHI | Monroe | 34 hr |
| Sep 8, 8:36 AM EDT | Areal Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 16 hr |
| Sep 8, 9:32 AM EDT | Areal Flood Warning | PHI | Berks, Bucks, Carbon, Chester, Lehigh, Montgomery | 15 hr |
| Sep 8, 11:12 AM EDT | River Flood Warning | PHI | Monroe, Northampton | 8 hr |
| Sep 8, 11:42 AM EDT | Coastal Flood Warning | PHI | Delaware, Philadelphia | 15 hr |
| Sep 8, 3:14 PM EDT | River Flood Warning | PHI | Lehigh, Northampton | 13 hr |
Nearby
Areal Flood Warnings in Pennsylvania, 2011Every areal flood warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.