Alert archive / Pennsylvania / Areal Flood Warnings in 2011
Areal Flood Warning 97, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood warning at Sep 27, 2011, 7:00 PM EDT for Berks County, Pennsylvania. It was in force for 3 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 27, 2011, 7:00 PM EDT (23:00 UTC)
- Expired
- Sep 27, 2011, 10:01 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Berks County, PA
The radar
The State College radar (KCCX), 153 km from the middle of the area, began a volume at 23:00 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.0 hours before the alert went out and 112 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
- 456 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 557 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
133
WGUS41 KPHI 272300
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
700 PM EDT TUE SEP 27 2011
PAC011-280500-
/O.NEW.KPHI.FA.W.0097.110927T2300Z-110928T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-
700 PM EDT TUE SEP 27 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLOOD WARNING FOR SMALL STREAMS IN...
WEST CENTRAL BERKS COUNTY IN EASTERN PENNSYLVANIA...
* UNTIL 100 AM EDT WEDNESDAY
* AT 655 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED
SHOWERS AND THUNDERSTORMS WHICH CONTINUED TO MOVE OVER THE SAME
AREAS. RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE WARNED
AREA.
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.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO
HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO
FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 4053 7634 4052 7630 4054 7621 4054 7617
4033 7617 4036 7621 4036 7624 4047 7640
4049 7644 4050 7644
$$
NIERENBERG1 follow-up statement
286
WGUS81 KPHI 280201
FLSPHI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1001 PM EDT TUE SEP 27 2011
PAC011-280210-
/O.CAN.KPHI.FA.W.0097.000000T0000Z-110928T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-
1001 PM EDT TUE SEP 27 2011
...THE FLOOD WARNING HAS BEEN CANCELLED FOR SMALL STREAMS IN WEST
CENTRAL BERKS COUNTY...
LAT...LON 4053 7634 4052 7630 4054 7621 4054 7617
4033 7617 4036 7621 4036 7624 4047 7640
4049 7644 4050 7644
$$
NIERENBERGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 10:00 AM EDT | Special Weather Statement | PHI | Schuylkill | 45 min |
| Sep 27, 11:13 AM EDT | Special Weather Statement | PHI | Carbon | 62 min |
| Sep 27, 5:37 PM EDT | Special Weather Statement | PHI | Lebanon | 83 min |
| Sep 27, 7:42 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 93 min |
| Sep 27, 7:45 PM EDT | Areal Flood Warning | PHI | Carbon | 3 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.