Alert archive / Maryland / Coastal Flood Statements in 2015

Coastal Flood Statement 4, NWS Wakefield, VA

April 20, 2015Dorchester County, Somerset County, Wicomico County, Maryland

NWS Wakefield, VA issued this coastal flood statement at Apr 20, 2015, 10:46 PM EDT for Dorchester County, Somerset County, Wicomico County, Maryland. It took effect at Apr 21, 2015, 2:00 AM EDT. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Apr 20, 2015, 10:46 PM EDT (02:46 UTC)
In effect from
Apr 21, 2015, 2:00 AM EDT
Expired
Apr 21, 2015, 6:00 AM EDT
In force
4 hr
Issued by
NWS Wakefield, VA

Counties Dorchester County, MD, Somerset County, MD, Wicomico County, MD

The radar

The Dover AFB radar (KDOX), 70 km from the middle of the area, began a volume at 02:48 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

Wallops Is Stn, VA (KWAL), launched 00:00Z, 2.8 hours before the alert went out and 57 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 2015-04-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 157 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 2015-04-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 square meters per square second.1939587897117Sfc1 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
157 J/kg
Mixed-layer CIN
-146 J/kg
Mixed-layer LCL
1129 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
195 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The office that day

Everything else NWS Wakefield, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 20, 8:34 PM EDTSpecial Weather StatementAKQDinwiddie26 min
Apr 20, 8:46 PM EDTSpecial Weather StatementAKQDinwiddie, Prince George, City of Colonial Heights, City of Hopewell, City of Petersburg29 min
Apr 20, 9:54 PM EDTSpecial Weather StatementAKQSouthampton, City of Franklin36 min
Apr 20, 11:50 PM EDTSpecial Weather StatementAKQBrunswick40 min
Apr 21, 12:31 AM EDTSpecial Weather StatementAKQBrunswick, Greensville, City of Emporia44 min
Apr 21, 1:20 AM EDTSpecial Weather StatementAKQSouthampton40 min
Apr 21, 2:04 AM EDTSpecial Weather StatementAKQCity of Suffolk41 min
Apr 21, 8:28 AM EDTRiver Flood WarningAKQChesterfield, Henrico, City of Richmond42 hr
Apr 21, 3:50 PM EDTSmall Craft AdvisoryAKQ42 hr
Apr 20, 9:33 PM EDTSpecial Weather StatementAKQNorthampton27 min
Apr 21, 2:42 AM EDTSpecial Weather StatementAKQGates, Hertford33 min

Nearby

Coastal Flood Statements in Maryland, 2015Every coastal flood statement in 2015

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.