Alert archive / Pennsylvania / Areal Flood Advisories in 2011
Areal Flood Advisory 105, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Aug 13, 2011, 7:47 PM EDT for Berks County, Pennsylvania. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 13, 2011, 7:47 PM EDT (23:47 UTC)
- Expired
- Aug 13, 2011, 10:45 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 23:48 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 12:00Z, 11.8 hours before the alert went out and 206 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
- 611 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 672 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at Aug 13, 7:35 PM EDT, 12 minutes earlier.
Area forecast discussion, Aug 13, 7:35 PM EDT, 12 minutes before
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</html>Hazardous weather outlook, Aug 13, 7:42 PM EDT, 5 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 742 PM EDT SAT AUG 13 2011 DEZ001-MDZ008-NJZ001-007>010-012-015-PAZ054-055-060>062-067>071- 142345- NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX- MERCER-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY- BUCKS-DELAWARE-PHILADELPHIA- 742 PM EDT SAT AUG 13 2011 ...FLOOD WATCH IN EFFECT THROUGH LATE SUNDAY NIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY...NORTHERN NEW JERSEY...NORTHWEST NEW JERSEY...EAST CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND SOUTHEAST PENNSYLVANIA. .DAY ONE...TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLOOD WATCH. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLOOD WATCH. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. DEZ002-003-MDZ012-015-019-020-NJZ013-016>023-027-142345- KENT-INLAND SUSSEX-KENT MD-QUEEN ANNES-TALBOT-CAROLINE- WESTERN MONMOUTH-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON- OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY-SOUTHEASTERN BURLINGTON- 742 PM EDT SAT AUG 13 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...SOUTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY AND SOUTHERN NEW JERSEY. .DAY ONE...TONIGHT. LOCALLY HEAVY RAIN IS POSSIBLE, WHICH MAY PRODUCE SOME FLOODING IN AREAS OF POOR DRAINAGE AND ON ROADWAYS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. LOCALLY HEAVY RAIN IS POSSIBLE SUNDAY, WHICH MAY PRODUCE SOME FLOODING IN AREAS OF POOR DRAINAGE AND ON ROADWAYS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. DEZ004-NJZ014-024>026-142345- DELAWARE BEACHES-EASTERN MONMOUTH-ATLANTIC COASTAL CAPE MAY- COASTAL ATLANTIC-COASTAL OCEAN- 742 PM EDT SAT AUG 13 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN DELAWARE...CENTRAL NEW JERSEY AND SOUTHERN NEW JERSEY. .DAY ONE...TONIGHT. LOCALLY HEAVY RAIN IS POSSIBLE, WHICH MAY PRODUCE SOME FLOODING IN AREAS OF POOR DRAINAGE AND ON ROADWAYS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE IS A MODERATE RISK OF RIP CURRENTS ON SUNDAY. LOCALLY HEAVY RAIN IS POSSIBLE SUNDAY, WHICH MAY PRODUCE SOME FLOODING IN AREAS OF POOR DRAINAGE AND ON ROADWAYS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ430-431-450>455-142345- DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM- COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM- COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM- COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM- COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM- COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM- 742 PM EDT SAT AUG 13 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND DELAWARE BAY WATERS. .DAY ONE...TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
In the hours before
Special weather statement, Aug 13, 3:13 PM EDT, 4 hours 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
313 PM EDT SAT AUG 13 2011
DEZ001-002-MDZ008-012-NJZ016-021-132045-
CECIL MD-CUMBERLAND NJ-KENT MD-KENT DE-NEW CASTLE DE-SALEM NJ-
313 PM EDT SAT AUG 13 2011
SHOWERS AND THUNDERSTORMS WILL CONTINUE TO EFFECT THE NORTHERN
PORTIONS OF THE DELMARVA...AS WELL AS FAR SOUTHWESTERN NEW
JERSEY...INTO THE LATE AFTERNOON HOURS. SOME OF THESE THUNDERSTORMS
WILL PRODUCE HEAVY DOWNPOURS WHICH COULD RESULT IN PONDING OF WATER
IN AREAS OF POOR DRAINAGE. IN ADDITION...GUSTY WINDS UP TO 40
MPH...FREQUENT LIGHTNING AND SMALL HAIL ARE POSSIBLE.
LAT...LON 3951 7599 3972 7624 3973 7578 3983 7567
3984 7552 3951 7499 3928 7530 3946 7555
3958 7556 3946 7558 3924 7538 3909 7540
3894 7531 3883 7572 3925 7577 3924 7601
3914 7607 3915 7628
FORECASTER:
JJMSpecial weather statement, Aug 13, 4:32 PM EDT, 3 hours 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
432 PM EDT SAT AUG 13 2011
PAZ060-067-132200-
BERKS PA-CHESTER PA-
432 PM EDT SAT AUG 13 2011
...STRONG THUNDERSTORMS WILL MOVE THROUGH THE AREA LATE THIS
AFTERNOON...
SHOWERS AND THUNDERSTORMS WILL BE MOVING THROUGH THE REGION LATE
THIS AFTERNOON. SOME THUNDERSTORMS COULD PRODUCE GUSTY WINDS UP TO
40 MPH...HEAVY RAIN...SMALL HAIL AND LIGHTNING. PONDING OF WATER IS
POSSIBLE IN AREAS OF POOR DRAINAGE.
MORE RAIN IS ON TAP FOR THE LATE OVERNIGHT HOURS AND ON SUNDAY. A
FLOOD WATCH HAS BEEN POSTED FOR THE REGION THROUGH LATE SUNDAY NIGHT.
LAT...LON 4051 7643 4059 7603 4064 7600 4068 7589
4029 7567 4025 7569 4020 7557 4009 7545
4007 7537 4004 7543 3999 7545 3987 7562
3984 7560 3982 7570 3973 7578 3973 7615
3987 7601 4011 7595 4014 7590 4050 7644
JJMSpecial weather statement, Aug 13, 5:06 PM EDT, 2 hours 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
506 PM EDT SAT AUG 13 2011
PAZ054-055-132230-
CARBON PA-MONROE PA-
506 PM EDT SAT AUG 13 2011
...A STRONG THUNDERSTORM WILL AFFECT CARBON AND MONROE COUNTIES...
AT 459 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 15 MILES SOUTHWEST OF WILKES-BARRE...MOVING EAST
AT 20 MPH. THE THUNDERSTORM WILL BE NEAR...WHITE HAVEN AROUND 530
PM...LAKE HARMONY AROUND 600 PM...POCONO RACEWAY AND MECKESVILLE
AROUND 615 PM.
WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM.
EXPECT SMALL HAIL AND FREQUENT...CLOUD TO GROUND LIGHTNING FROM THIS
STORM. HEAVY DOWNPOURS RESULTING IN THE PONDING OF WATER IN AREAS OF
POOR DRAINAGE CAN ALSO BE EXPECTED.
LAT...LON 4121 7514 4116 7517 4114 7507 4109 7503
4110 7499 4108 7497 4100 7511 4096 7515
4087 7529 4084 7582 4091 7599 4100 7575
4105 7578 4110 7577 4114 7570 4113 7564
4123 7554 4125 7546 4126 7514
FORECASTER: JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 3:10 PM EDT | Flood Watch | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more | 13 hr |
| Aug 13, 3:13 PM EDT | Special Weather Statement | PHI | Salem | 92 min |
| Aug 13, 1:20 PM EDT | Special Weather Statement | PHI | Chester | 115 min |
| Aug 13, 4:32 PM EDT | Special Weather Statement | PHI | Berks, Chester | 88 min |
| Aug 13, 5:06 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 84 min |
| Aug 13, 6:15 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 30 min |
| Aug 13, 12:13 PM EDT | Special Weather Statement | PHI | Cecil | 62 min |
Nearby
Areal Flood Advisories in Pennsylvania, 2011Every areal flood advisory 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.