Alert archive / Maryland / Coastal Flood Advisories in 2011

Coastal Flood Advisory 26, NWS Philadelphia/Mount Holly

June 17, 20115 counties in Maryland

NWS Philadelphia/Mount Holly issued this coastal flood advisory at Jun 17, 2011, 3:10 AM EDT for 5 counties in Maryland. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Jun 17, 2011, 3:10 AM EDT (07:10 UTC)
Expired
Jun 17, 2011, 12:35 PM EDT
In force
9 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 nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 7.2 hours before the alert went out and 140 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, Wallops Is Stn, VA at 00:00Z on 2011-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 30 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, Wallops Is Stn, VA at 00:00Z on 2011-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.193958Sfc1 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
30 J/kg
Mixed-layer CIN
-144 J/kg
Mixed-layer LCL
1237 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this coastal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this coastal flood advisory went out at Jun 16, 10:25 PM EDT, 4 hours 45 minutes earlier.

Area forecast discussion, Jun 16, 10:25 PM EDT, 4 hours 45 minutes before
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Hazardous weather outlook, Jun 16, 9:42 PM EDT, 5 hours 28 minutes before
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In the hours before

Special weather statement, Jun 16, 9:10 PM EDT, 6 hours before
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Special weather statement, Jun 16, 11:45 PM EDT, 3 hours 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1145 PM EDT THU JUN 16 2011

DEZ003-004-170445-
DELAWARE BEACHES DE-INLAND SUSSEX DE-
1145 PM EDT THU JUN 16 2011

...A STRONG THUNDERSTORM WILL AFFECT SUSSEX COUNTY...

AT 1140 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 16 MILES WEST OF GEORGETOWN...MOVING NORTHEAST AT
25 MPH.

HEAVY RAIN WILL FALL FROM THIS STORM, AND WILL CAUSE WATER TO POND
ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND POOR DRAINAGE AREAS.

LOCAL WIND GUSTS TO AROUND 30 MPH ARE POSSIBLE WITH THIS STORM.
EXPECT CLOUD TO GROUND LIGHTNING WITH THIS STORM. DO NOT SEEK
SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A
THUNDERSTORM APPROACHES.

LAT...LON 3864 7571 3874 7570 3894 7531 3889 7525
      3883 7521 3880 7514 3872 7506 3869 7506
      3868 7512 3867 7513 3850 7569

FORECASTER: GORSE
Special weather statement, Jun 17, 12:51 AM EDT, 2 hours 19 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1251 AM EDT FRI JUN 17 2011

DEZ003-004-170545-
DELAWARE BEACHES DE-INLAND SUSSEX DE-
1251 AM EDT FRI JUN 17 2011

...STRONG THUNDERSTORMS WILL CONTINUE TO AFFECT SUSSEX COUNTY...

AT 1250 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
A CLUSTER OF STRONG THUNDERSTORMS MOVING ACROSS THE COUNTY. THESE
STORMS ARE MOVING TO THE NORTHEAST AT 25 MPH.

HEAVY RAIN WILL FALL FROM THESE STORMS, AND WILL CAUSE WATER TO POND
ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND POOR DRAINAGE AREAS.

LOCAL WIND GUSTS TO AROUND 30 MPH ARE POSSIBLE WITH THESE STORMS.
EXPECT CLOUD TO GROUND LIGHTNING WITH THESE STORMS. DO NOT SEEK
SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A
THUNDERSTORM APPROACHES.

LAT...LON 3846 7568 3866 7571 3878 7570 3894 7531
      3881 7518 3879 7513 3879 7511 3881 7509
      3880 7507 3865 7505 3863 7506 3860 7504
      3856 7505

FORECASTER: GORSE
Special weather statement, Jun 17, 2:00 AM EDT, 1 hour 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
200 AM EDT FRI JUN 17 2011

NJZ023-024-170700-
ATLANTIC COASTAL CAPE MAY NJ-CAPE MAY NJ-
200 AM EDT FRI JUN 17 2011

...A STRONG THUNDERSTORM WILL AFFECT CAPE MAY COUNTY...

AT 158 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 11 MILES NORTH OF CAPE MAY...MOVING NORTHEAST AT
30 MPH.

HEAVY RAIN WILL FALL FROM THIS STORM, AND WILL CAUSE WATER TO POND
ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND POOR DRAINAGE AREAS.

LOCAL WIND GUSTS TO 30 MPH ARE POSSIBLE WITH THIS STORM. EXPECT
CLOUD TO GROUND LIGHTNING WITH THIS STORM. DO NOT SEEK SHELTER UNDER
TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM
APPROACHES.

LAT...LON 3898 7498 3911 7490 3915 7490 3916 7491
      3928 7474 3921 7463 3912 7470 3910 7470
      3907 7471 3902 7479 3894 7486 3892 7493

FORECASTER: GORSE

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 9:32 PM EDTCoastal Flood AdvisoryPHISalem4 hr
Jun 17, 2:00 AM EDTSpecial Weather StatementPHICape May60 min
Jun 17, 4:39 AM EDTSpecial Weather StatementPHIMercer, Middlesex, Somerset51 min
Jun 17, 1:30 PM EDTSpecial Weather StatementPHISussex, Warren60 min
Jun 17, 1:45 PM EDTSpecial Weather StatementPHIMorris45 min
Jun 17, 1:48 PM EDTSevere Thunderstorm WarningPHISussex, Warren57 min
Jun 17, 3:31 PM EDTSpecial Weather StatementPHIMiddlesex59 min
Jun 17, 3:45 PM EDTSpecial Weather StatementPHICumberland, Gloucester, Salem60 min
Jun 17, 4:48 PM EDTSpecial Weather StatementPHIMonmouth57 min
Jun 17, 7:35 PM EDTSpecial Marine WarningPHI25 min
Jun 17, 4:05 AM EDTSpecial Weather StatementPHIPhiladelphia55 min
Jun 17, 2:34 PM EDTSpecial Weather StatementPHICecil56 min
Jun 17, 7:02 PM EDTSpecial Weather StatementPHICaroline, Talbot58 min
Jun 17, 7:23 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot52 min

Nearby

Coastal Flood Advisories in Maryland, 2011Every coastal flood advisory 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.