Alert archive / Maryland / Coastal Flood Statements in 2011

Coastal Flood Statement 40, NWS Philadelphia/Mount Holly

September 29, 2011Caroline County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this coastal flood statement at Sep 29, 2011, 3:34 AM EDT for Caroline County, Talbot County, Maryland. It took effect at Sep 29, 2011, 5:00 AM EDT. It was in force for 89 min.

The area

The counties it named.

The facts

Issued
Sep 29, 2011, 3:34 AM EDT (07:34 UTC)
In effect from
Sep 29, 2011, 5:00 AM EDT
Expired
Sep 29, 2011, 6:29 AM EDT
In force
89 min
Issued by
NWS Philadelphia/Mount Holly

Counties Caroline County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 49 km from the middle of the area, began a volume at 07:37 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 7.6 hours before the alert went out and 111 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.

Skew-T log-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2011-09-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 831 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2011-09-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
831 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
760 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
53 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

544 
WHUS41 KPHI 290734
CFWPHI

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
334 AM EDT THU SEP 29 2011

DEZ002>004-NJZ012>014-020>027-291600-
/O.NEW.KPHI.CF.Y.0048.110929T1200Z-110929T1600Z/
KENT-INLAND SUSSEX-DELAWARE BEACHES-MIDDLESEX-WESTERN MONMOUTH-
EASTERN MONMOUTH-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY-
ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-COASTAL OCEAN-
SOUTHEASTERN BURLINGTON-
334 AM EDT THU SEP 29 2011

...COASTAL FLOOD ADVISORY IN EFFECT FROM 8 AM THIS MORNING TO
NOON EDT TODAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A COASTAL
FLOOD ADVISORY...WHICH IS IN EFFECT FROM 8 AM THIS MORNING TO
NOON EDT TODAY. 

* LOCATION...THE COASTAL AREAS OF DELAWARE AND NEW JERSEY
  INCLUDING THE BACK BAYS. THE LOWER DELAWARE BAY.

* COASTAL FLOODING...WIDESPREAD MINOR COASTAL FLOODING WILL OCCUR
  WITHIN AN HOUR OF THIS MORNINGS HIGH TIDE.

* TIMING...NEXT HIGH TIDE AT SANDY HOOK NJ AND ATLANTIC CITY NJ IS
  AROUND 930 AM. THE BACK BAYS AND THE LOWER DELAWARE RIVER WILL
  BE CLOSER TO 1030 AM. 

* IMPACTS...VULNERABLE ROADWAYS WILL FLOOD WITH THE LATE MORNING
  HIGH TIDE CYCLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A COASTAL FLOOD ADVISORY INDICATES THAT MINOR TIDAL FLOODING IS
ANTICIPATED. MINOR TIDAL FLOODING OFTEN RESULTS IN SOME ROADS
CLOSURES. USUALLY...THE MOST VULNERABLE ROADWAYS WILL FLOOD.

DO NOT LEAVE YOUR VEHICLE AT A LOCATION THAT IS PRONE TO TIDAL
FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOOD WATERS. THE
WATER MAY BE DEEPER THAN YOU THINK IT IS. YOU WILL BE PUTTING
YOURSELF IN DANGER AND YOUR VEHICLE MAY BE DAMAGED...LEADING TO
COSTLY REPAIR.

FOR A LIST OF THE IMPACT OF DIFFERENT TIDE HEIGHTS IN YOUR
COUNTY PLEASE GO TO WWW.WEATHER.GOV/PHI/TIDES.HTM (ALL IN LOWER
CASE).

&&

$$

DEZ001-NJZ015>019-PAZ069>071-291000-
/O.CON.KPHI.CF.Y.0047.000000T0000Z-110929T1000Z/
NEW CASTLE-MERCER-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-
BUCKS-DELAWARE-PHILADELPHIA-
334 AM EDT THU SEP 29 2011

...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT EARLY
THIS MORNING...

* LOCATION...THE TIDAL DELAWARE RIVER

* COASTAL FLOODING...MINOR TIDAL FLOODING IS OCCURRING WITH THE
  PREDAWN HIGH TIDE CYCLE NEAR PHILADELPHIA THOUGH TIDES ARE
  BEGINNING TO RECEDE FURTHER SOUTH ALONG SALEM AND NEW CASTLE
  COUNTIES. ANOTHER WIDESPREAD MINOR FLOOD EPISODE WILL OCCUR THIS
  AFTERNOON AND AN ADVISORY WILL BE ISSUED AFTER 6 AM.

* TIMING...HIGH TIDE ON THE DELAWARE RIVER AT PHILADELPHIA
  OCCURRED AT 314 AM TODAY.

* IMPACTS...LOCALIZED ROADWAY FLOODING WILL OCCUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A COASTAL FLOOD ADVISORY INDICATES THAT MINOR TIDAL FLOODING IS
ANTICIPATED. MINOR TIDAL FLOODING OFTEN RESULTS IN SOME ROADS
CLOSURES. USUALLY...THE MOST VULNERABLE ROADWAYS WILL FLOOD.

DO NOT LEAVE YOUR VEHICLE AT A LOCATION THAT IS PRONE TO TIDAL
FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOOD WATERS. THE
WATER MAY BE DEEPER THAN YOU THINK IT IS. YOU WILL BE PUTTING
YOURSELF IN DANGER AND YOUR VEHICLE MAY BE DAMAGED...LEADING TO
COSTLY REPAIR.

FOR A LIST OF THE IMPACT OF DIFFERENT TIDE HEIGHTS IN YOUR COUNTY
PLEASE GO TO WWW.WEATHER.GOV/PHI/TIDES.HTM (ALL IN LOWER CASE).

&&

$$

MDZ019-020-291600-
/O.NEW.KPHI.CF.S.0040.110929T0900Z-110930T1300Z/
TALBOT-CAROLINE-
334 AM EDT THU SEP 29 2011

* LOCATION...TALBOT AND CAROLINE COUNTIES ALONG MARYLAND'S EASTERN
  SHORE. 

* COASTAL FLOODING...SPOTTY MINOR FLOODING WITHIN 30 MINUTES OF
  THE MORNING HIGH TIDE. 

* TIMING...HIGH TIDE AT CAMBRIDGE IS AROUND 530 AM WITH HIGH TIDE
  ON THE CHOPTANK RIVER AT DENTON AROUND 830 AM.  



$$


  
DRAG
1 follow-up statement
211 
WHUS41 KPHI 291029
CFWPHI

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
629 AM EDT THU SEP 29 2011

DEZ001-NJZ016>019-PAZ070-071-291830-
/O.EXP.KPHI.CF.Y.0047.000000T0000Z-110929T1000Z/
/O.EXB.KPHI.CF.Y.0048.110929T1600Z-110929T2200Z/
NEW CASTLE-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-
DELAWARE-PHILADELPHIA-
629 AM EDT THU SEP 29 2011

...COASTAL FLOOD ADVISORY IN EFFECT FROM NOON TODAY TO 6 PM EDT
THIS EVENING...
...COASTAL FLOOD ADVISORY HAS EXPIRED...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A COASTAL
FLOOD ADVISORY...WHICH IS IN EFFECT FROM NOON TODAY TO 6 PM EDT
THIS EVENING. 

* COASTAL FLOODING...WIDESPREAD MINOR TIDAL FLOODING WILL OCCUR
  THIS AFTERNOON AND THIS ADVISORY REPLACES THE JUST EXPIRED EARLY
  MORNING ADVISORY FOR THIS REGION. 

* TIMING...HIGH TIDE ON THE DELAWARE RIVER AT REEDY POINT OCCURS
  AT 103 PM TODAY AND IN PHILADELPHIA AROUND 350 PM.

* IMPACTS...ROADWAY FLOODING WILL OCCUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A COASTAL FLOOD ADVISORY INDICATES THAT MINOR TIDAL FLOODING IS
ANTICIPATED. MINOR TIDAL FLOODING OFTEN RESULTS IN SOME ROADS
CLOSURES. USUALLY...THE MOST VULNERABLE ROADWAYS WILL FLOOD.

DO NOT LEAVE YOUR VEHICLE AT A LOCATION THAT IS PRONE TO TIDAL
FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOOD WATERS. THE
WATER MAY BE DEEPER THAN YOU THINK IT IS. YOU WILL BE PUTTING
YOURSELF IN DANGER AND YOUR VEHICLE MAY BE DAMAGED...LEADING TO
COSTLY REPAIR.

FOR A LIST OF THE IMPACT OF DIFFERENT TIDE HEIGHTS IN YOUR
COUNTY PLEASE GO TO WWW.WEATHER.GOV/PHI/TIDES.HTM (ALL IN LOWER
CASE).

&&

$$

NJZ015-PAZ069-291130-
/O.EXP.KPHI.CF.Y.0047.000000T0000Z-110929T1000Z/
MERCER-BUCKS-
629 AM EDT THU SEP 29 2011

...COASTAL FLOOD ADVISORY HAS BEEN DISCONTINUED...



$$

MDZ019-020-291130-
/O.CAN.KPHI.CF.S.0040.000000T0000Z-110930T1300Z/
TALBOT-CAROLINE-
629 AM EDT THU SEP 29 2011

* LOCATION...TALBOT AND CAROLINE COUNTIES ALONG MARYLAND'S EASTERN
  SHORE.

* COASTAL FLOODING...SPOTTY MINOR FLOODING PROBABLY WONT OCCUR
  THIS MORNING.


$$

DEZ002>004-NJZ012>014-020>027-291600-
/O.CON.KPHI.CF.Y.0048.110929T1200Z-110929T1600Z/
KENT-INLAND SUSSEX-DELAWARE BEACHES-MIDDLESEX-WESTERN MONMOUTH-
EASTERN MONMOUTH-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY-
ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-COASTAL OCEAN-
SOUTHEASTERN BURLINGTON-
629 AM EDT THU SEP 29 2011

...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL NOON EDT
TODAY...

* LOCATION...THE COASTAL AREAS OF DELAWARE AND NEW JERSEY 
  INCLUDING THE BACK BAYS. THE LOWER DELAWARE BAY. 

* COASTAL FLOODING...WIDESPREAD MINOR COASTAL FLOODING WILL 
  OCCUR WITHIN AN HOUR OF THIS MORNINGS HIGH TIDE. 

* TIMING...NEXT HIGH TIDE AT SANDY HOOK NJ AND ATLANTIC CITY NJ 
  IS AROUND 930 AM. THE BACK BAYS AND THE LOWER DELAWARE RIVER 
  WILL BE CLOSER TO 1030 AM. 

* IMPACTS...VULNERABLE ROADWAYS WILL FLOOD WITH THE LATE MORNING 
  HIGH TIDE CYCLE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A COASTAL FLOOD ADVISORY INDICATES THAT MINOR TIDAL FLOODING IS
ANTICIPATED. MINOR TIDAL FLOODING OFTEN RESULTS IN SOME ROADS
CLOSURES. USUALLY...THE MOST VULNERABLE ROADWAYS WILL FLOOD.

DO NOT LEAVE YOUR VEHICLE AT A LOCATION THAT IS PRONE TO TIDAL
FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOOD WATERS. THE
WATER MAY BE DEEPER THAN YOU THINK IT IS. YOU WILL BE PUTTING
YOURSELF IN DANGER AND YOUR VEHICLE MAY BE DAMAGED...LEADING TO
COSTLY REPAIR.

FOR A LIST OF THE IMPACT OF DIFFERENT TIDE HEIGHTS IN YOUR COUNTY
PLEASE GO TO WWW.WEATHER.GOV/PHI/TIDES.HTM (ALL IN LOWER CASE).

&&

$$

DRAG

Nearby

Coastal Flood Statements in Maryland, 2011Every coastal flood statement 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.