Alert archive / Maryland / Flood Watches in 2012

Flood Watch 1, NWS Wakefield, VA

September 6, 20124 counties in Maryland

NWS Wakefield, VA issued this flood watch at Sep 6, 2012, 11:34 AM EDT for 4 counties in Maryland. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Sep 6, 2012, 11:34 AM EDT (15:34 UTC)
Expired
Sep 6, 2012, 4:16 PM EDT
In force
5 hr
Issued by
NWS Wakefield, VA
Flood severity
None

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

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 3.6 hours before the alert went out and 47 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 12:00Z on 2012-09-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 992 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 12:00Z on 2012-09-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 square meters per square second.1939Sfc1 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
992 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
564 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 6, 8:56 AM EDTSpecial Weather StatementAKQCaroline64 min
Sep 6, 9:35 AM EDTSpecial Weather StatementAKQPrince Edward70 min
Sep 6, 9:55 AM EDTSpecial Weather StatementAKQWestmoreland35 min
Sep 6, 10:55 AM EDTSpecial Weather StatementAKQCharles City, Dinwiddie, Henrico, James City, Lunenburg, Middlesex and 6 more95 min
Sep 6, 11:55 AM EDTSpecial Weather StatementAKQCharles City, Gloucester, James City, Lancaster, Middlesex, Northumberland and 3 more65 min
Sep 6, 12:57 PM EDTSpecial Weather StatementAKQCity of Hampton, City of Newport News, City of Poquoson63 min
Sep 6, 1:14 PM EDTAreal Flood AdvisoryAKQAccomack3 hr
Sep 6, 1:37 PM EDTSpecial Weather StatementAKQCity of Chesapeake, City of Norfolk, City of Portsmouth, City of Suffolk, City of Virginia Beach68 min
Sep 6, 1:52 PM EDTSpecial Weather StatementAKQNorthampton68 min
Sep 6, 1:54 PM EDTSpecial Marine WarningAKQ51 min
Sep 6, 2:09 PM EDTSpecial Weather StatementAKQMecklenburg66 min
Sep 6, 2:16 PM EDTSpecial Marine WarningAKQ89 min
Sep 6, 2:55 PM EDTSpecial Weather StatementAKQCity of Virginia Beach65 min
Sep 6, 4:04 PM EDTSpecial Weather StatementAKQBertie, Camden, Chowan, Currituck, Gates, Hertford and 1 more56 min
Sep 6, 4:58 PM EDTSpecial Weather StatementAKQBertie, Camden, Chowan, Currituck, Pasquotank47 min
Sep 5, 9:02 PM EDTSpecial Weather StatementAKQWicomico, Worcester58 min
Sep 5, 9:54 PM EDTSpecial Weather StatementAKQWorcester51 min
Sep 6, 6:29 AM EDTSpecial Weather StatementAKQSomerset, Wicomico, Worcester46 min
Sep 6, 9:24 AM EDTAreal Flood AdvisoryAKQWorcester3 hr
Sep 6, 11:00 AM EDTSpecial Weather StatementAKQDorchester, Wicomico75 min
Sep 6, 12:27 PM EDTAreal Flood AdvisoryAKQDorchester, Somerset, Wicomico3 hr

Nearby

Flood Watches in Maryland, 2012Every flood watch in 2012

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.