Alert archive / Maryland / Coastal Flood Statements in 2011

Coastal Flood Statement 17, NWS Philadelphia/Mount Holly

May 11, 20115 counties in Maryland

NWS Philadelphia/Mount Holly issued this coastal flood statement at May 11, 2011, 3:08 PM EDT for 5 counties in Maryland. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued
May 11, 2011, 3:08 PM EDT (19:08 UTC)
Expired
May 12, 2011, 3:32 AM EDT
In force
12 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 19:05 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, 7.1 hours before the alert went out and 43 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, Phillips Aaf/Abe, MD at 12:00Z on 2011-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2011-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
816 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
97 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.

100 
WHUS41 KPHI 111908
CFWPHI

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
308 PM EDT WED MAY 11 2011

MDZ008-012-015-019-020-121000-
/O.NEW.KPHI.CF.S.0017.110511T1908Z-110512T1000Z/
CECIL-KENT MD-QUEEN ANNES-TALBOT-CAROLINE-
308 PM EDT WED MAY 11 2011

DUE TO THE PERSISTENT NORTHEAST TO EAST FLOW ALONG THE COAST,
WATER LEVELS REMAIN HIGH ALONG THE EASTERN SHORE OF THE CHESAPEAKE
BAY IN MARYLAND. LATER LEVELS WILL LIKELY REMAIN ELEVATED OVER THE
NEXT COUPLE OF DAYS AND MAY APPROACH THE MINOR TIDAL FLOODING
LEVEL DURING SUBSEQUENT HIGH TIDE CYCLES. WE WILL CONTINUE TO
MONITOR THE LEVEL IN CASE AN ADVISORY IS NEEDED AT A LATER TIME.


$$

ROBERTSON
1 follow-up statement
115 
WHUS41 KPHI 120732
CFWPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
332 AM EDT THU MAY 12 2011

...HIGHER THAN NORMAL TIDES WILL APPROACH MINOR TIDAL INUNDATION
FLOOD THRESHOLDS FROM TIME TO TIME BETWEEN THIS COMING THURSDAY NIGHT
AND NEXT WEDNESDAY...

.A PERSISTENTLY SOUTH TO SOUTH SOUTHEAST FLOW OVER THE NEXT 5 TO 6
DAYS COMBINED WITH THE APPROACHING FULL MOON HAS SET THE STAGE FOR
EPISODES OF MOSTLY MINOR COASTAL FLOODING ON PORTIONS OF CHESAPEAKE
BAY.

MDZ008-012-015-019-020-120845-
/O.CAN.KPHI.CF.S.0017.000000T0000Z-110512T1000Z/
CECIL-KENT MD-QUEEN ANNES-TALBOT-CAROLINE-
332 AM EDT THU MAY 12 2011

NO TIDAL INUNDATION FLOODING OCCURRED OVERNIGHT ALONG THE EASTERN
SHORE OF THE CHESAPEAKE BAY IN MARYLAND.

WATER LEVELS WILL REMAIN ELEVATED THROUGH THIS COMING TUESDAY OR
WEDNESDAY. 

NEW STATEMENTS OR ADVISORIES WILL BE ISSUED ONCE THERE IS MORE 
CERTAINTY OF THE NEXT POSSIBLE FLOOD EPISODE. THERE IS A CHANCE
OF VERY MINOR TIDAL FLOODING THIS COMING THURSDAY NIGHT.

EVENTUALLY THERE WILL BE A MUCH BETTER CHANCE FOR AN EXTENSIVE MINOR
COASTAL FLOOD EPISODE...PROBABLY CENTERED ON EARLY SUNDAY OR MONDAY
MORNING.

$$

DRAG

The office that day

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

IssuedProductOfficeCountiesLasted
May 11, 9:00 AM EDTCoastal Flood AdvisoryPHICaroline, Cecil, Kent, Queen Anne's, Talbot5 hr

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.