Alert archive / Maryland / Coastal Flood Advisories in 2016

Coastal Flood Advisory 21, NWS Philadelphia/Mount Holly

September 7, 20165 counties in Maryland

NWS Philadelphia/Mount Holly issued this coastal flood advisory at Sep 7, 2016, 6:47 AM EDT for 5 counties in Maryland. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Sep 7, 2016, 6:47 AM EDT (10:47 UTC)
Expired: Sep 7, 2016, 9:39 AM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly

Counties Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 59 km from the middle of the area, began a volume at 10:48 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 00:00Z, 10.8 hours before the alert went out and 120 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 2249 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

059 
WHUS41 KPHI 071047
CFWPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE FOR PENNSYLVANIA...NEW JERSEY...DELAWARE...
AND MARYLAND
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
647 AM EDT WED SEP 7 2016



MDZ008-012-015-019-020-071700-
/O.NEW.KPHI.CF.Y.0021.160907T1047Z-160907T1700Z/
CECIL-KENT MD-QUEEN ANNES-TALBOT-CAROLINE-
647 AM EDT WED SEP 7 2016

...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A COASTAL
FLOOD ADVISORY...WHICH IS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON.

* LOCATION...THE NORTHEASTERN SHORE OF THE CHESAPEAKE BAY.

* COASTAL FLOODING...MINOR COASTAL FLOODING IS EXPECTED ALONG THE
  NORTHEASTERN SHORE OF THE CHESAPEAKE BAY

* TIMING...MINOR FLOODING WILL OCCUR WITH THE HIGH TIDE THIS
  MORNING.

* SURGE...WATER LEVELS WILL BE ABOUT 1.5 TO 2 FEET ABOVE
  ASTRONOMICAL TIDES.

* IMPACTS...MINOR ROADWAY FLOODING IS POSSIBLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A COASTAL FLOOD ADVISORY MEANS THAT MINOR TIDAL FLOODING IS
EXPECTED. MINOR TIDAL FLOODING OFTEN RESULTS IN SOME ROAD
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 REPAIRS.

FOR A LIST OF THE IMPACT OF DIFFERENT TIDE HEIGHTS IN YOUR
COUNTY PLEASE GO TO WWW.WEATHER.GOV/PHI/TIDES

&&

$$

1 follow-up statement

996 
WHUS41 KPHI 071339
CFWPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE FOR PENNSYLVANIA...NEW JERSEY...DELAWARE...
AND MARYLAND
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
939 AM EDT WED SEP 7 2016

.
MDZ008-012-015-019-020-071445-
/O.CAN.KPHI.CF.Y.0021.000000T0000Z-160907T1700Z/
CECIL-KENT MD-QUEEN ANNES-TALBOT-CAROLINE-
939 AM EDT WED SEP 7 2016

...COASTAL FLOOD ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE
COASTAL FLOOD ADVISORY FOR MARYLANDS EASTERN SHORE.

ONLY SPOTTY MINOR TIDAL INUNDATION FLOODING IS EXPECTED WITH
TODAY'S HIGH TIDE.

$$
DRAG

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 11:50 AM EDT	Heat Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	3 days

Nearby

Coastal Flood Advisories in Maryland, 2016 Every coastal flood advisory in 2016

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.