Alert archive / Maryland / Coastal Flood Statements in 2011

Coastal Flood Statement 29, NWS Philadelphia/Mount Holly

August 10, 2011Queen Anne's County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this coastal flood statement at Aug 10, 2011, 12:34 AM EDT for Queen Anne's County, Talbot County, Maryland. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Aug 10, 2011, 12:34 AM EDT (04:34 UTC)
Expired
Aug 10, 2011, 4:00 AM EDT
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly

Counties Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 60 km from the middle of the area, began a volume at 04:40 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, 4.6 hours before the alert went out and 110 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 00:00Z on 2011-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 59 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 00:00Z on 2011-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
59 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
1904 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
18 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

512 
WHUS41 KPHI 100434
CFWPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1234 AM EDT WED AUG 10 2011

MDZ015-019-100800-
/O.NEW.KPHI.CF.S.0029.110810T0434Z-110810T0800Z/
QUEEN ANNES-TALBOT-
1234 AM EDT WED AUG 10 2011

* LOCATION...CHESAPEAKE BAY NEAR CAMBRIDGE MARYLAND.

* COASTAL FLOODING...SPOTTY MINOR TIDAL FLOODING IS POSSIBLE
  AROUND THE TIME OF HIGH TIDE EARLY THIS MORNING.

* TIMING...HIGH TIDE OCCURS AT CAMBRIDGE AROUND 200 AM.

* IMPACTS...LOCALIZED ROADWAY FLOODING IS POSSIBLE.

$$

HAYES

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 8:56 PM EDTSpecial Weather StatementPHIKent64 min

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.