Alert archive / Maryland / Coastal Flood Statements in 2011

Coastal Flood Statement 18, NWS Philadelphia/Mount Holly

May 12, 2011Caroline County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this coastal flood statement at May 12, 2011, 8:40 AM EDT for Caroline County, Talbot County, Maryland. It took effect at May 12, 2011, 10:00 AM EDT. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
May 12, 2011, 8:40 AM EDT (12:40 UTC)
In effect from
May 12, 2011, 10:00 AM EDT
Expired
May 12, 2011, 2:00 PM EDT
In force
4 hr
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 12:43 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, 0.7 hours before the alert went out and 74 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 2011-05-12Temperature 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 km15 km-30°-20°-10°0°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 2011-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.1939587897Sfc1 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
778 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
65 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.

487 
WHUS41 KPHI 121240
CFWPHI

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

MDZ019-020-121800-
/O.NEW.KPHI.CF.S.0018.110512T1400Z-110512T1800Z/
TALBOT-CAROLINE-
840 AM EDT THU MAY 12 2011

...SPOTTY MINOR TIDAL FLOODING...

TIDE LEVELS CONTINUE TO RUN HIGH ON CHESAPEAKE BAY. AS A RESULT,
SPOTTY MINOR TIDAL FLOODING IS POSSIBLE AROUND THE MIDDAY HIGH
TIDE IN TALBOT COUNTY AND IN CAROLINE COUNTY.

ONLY THOSE LOCATIONS THAT ARE MOST SUSCEPTIBLE TO TIDAL FLOODING
MAY BE AFFECTED.

$$

IOVINO

The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 7:21 PM EDTCoastal Flood StatementPHIQueen Anne's, Talbot6 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.