Alert archive / Maryland / Coastal Flood Statements in 2011

Coastal Flood Statement 30, NWS Philadelphia/Mount Holly

August 28, 20115 counties in Maryland

NWS Philadelphia/Mount Holly issued this coastal flood statement at Aug 28, 2011, 3:23 PM EDT for 5 counties in Maryland. It was in force for 82 min.

The area

The counties it named.

The facts

Issued
Aug 28, 2011, 3:23 PM EDT (19:23 UTC)
Expired
Aug 28, 2011, 4:45 PM EDT
In force
82 min
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 19:21 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, 7.4 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-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2011-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 56 joules per kilogram.LCLLFCEL10008507005003002001001 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, Washington/Dulle, VA at 12:00Z on 2011-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -84 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
56 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
598 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-84 m²/s²
0-3 km storm-relative helicity
-303 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.

575 
WHUS41 KPHI 281923
CFWPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
323 PM EDT SUN AUG 28 2011

MDZ008-012-015-019-020-290000-
/O.NEW.KPHI.CF.S.0030.110828T1923Z-110829T0000Z/
CECIL-KENT MD-QUEEN ANNES-TALBOT-CAROLINE-
323 PM EDT SUN AUG 28 2011

* LOCATION...THE NORTHERN MARYLAND EASTERN SHORE. 

* COASTAL FLOODING...SPOTTY MINOR TIDAL FLOODING POSSIBLE. 

* TIMING...THROUGH 8 PM EDT.

* IMPACTS...THE MOST FLOOD-PRONE AREAS MAY EXPERIENCE MINOR
  FLOODING. 

$$

MPD
1 follow-up statement
871 
WHUS41 KPHI 282045
CFWPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
445 PM EDT SUN AUG 28 2011

MDZ008-012-015-019-020-282145-
/O.CAN.KPHI.CF.S.0030.000000T0000Z-110829T0000Z/
CECIL-KENT MD-QUEEN ANNES-TALBOT-CAROLINE-
445 PM EDT SUN AUG 28 2011

THE THREAT OF MINOR TIDAL FLOODING HAS ENDED ACROSS THE MARYLAND
EASTERN SHORE.

$$

MPD

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 27, 8:28 PM EDTFlash Flood WarningPHICecil, Kent, Queen Anne's12 hr
Aug 27, 8:49 PM EDTTornado WarningPHIKent, Queen Anne's26 min
Aug 28, 7:07 AM EDTAreal Flood WarningPHICaroline, Queen Anne's, Talbot12 hr
Aug 28, 8:09 AM EDTAreal Flood WarningPHICecil, Kent12 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.