Alert archive / Delaware / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

August 9, 2012Kent County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 9, 2012, 12:34 PM EDT for Kent County, Delaware. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 9, 2012, 12:34 PM EDT (16:34 UTC)
Expired
Aug 9, 2012, 1:30 PM EDT
In force
56 min
Issued by
NWS Philadelphia/Mount Holly

County Kent County, DE

The radar

The Dover AFB radar (KDOX), 28 km from the middle of the area, began a volume at 16:36 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 4.6 hours before the alert went out and 66 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, Phillips Aaf/Abe, MD at 12:00Z on 2012-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1906 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2012-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
1906 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
754 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
37 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.

089 
WWUS81 KPHI 091634
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1234 PM EDT THU AUG 9 2012

DEZ002-MDZ020-091730-
CAROLINE MD-KENT DE-
1234 PM EDT THU AUG 9 2012

...A STRONG THUNDERSTORM WILL AFFECT CAROLINE AND KENT COUNTIES...

AT 1231 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 15 MILES SOUTHWEST OF DOVER...MOVING EAST AT 15
MPH. THE THUNDERSTORM WILL BE NEAR FELTON...HAZLETTVILLE AROUND 100
PM...WOODSIDE EAST...VIOLA AROUND 115 PM...MAGNOLIA AND RISING SUN
AROUND 130 PM.

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

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. DO
NOT SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS
WHEN A THUNDERSTORM APPROACHES.

LAT...LON 3908 7583 3923 7544 3913 7539 3907 7539
      3904 7535 3898 7532 3890 7576

$$

MEOLA

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 1:17 PM EDTSpecial Marine WarningPHI88 min
Aug 9, 1:46 PM EDTSpecial Marine WarningPHI54 min
Aug 9, 2:01 PM EDTSpecial Marine WarningPHI119 min
Aug 9, 2:20 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Warren70 min
Aug 9, 2:25 PM EDTSevere Thunderstorm WarningPHIHunterdon, Somerset65 min
Aug 9, 2:56 PM EDTSpecial Weather StatementPHISussex94 min
Aug 9, 3:23 PM EDTSevere Thunderstorm WarningPHISussex71 min
Aug 9, 3:35 PM EDTSpecial Weather StatementPHIMercer, Middlesex, Morris, Somerset55 min
Aug 9, 4:18 PM EDTSpecial Weather StatementPHIHunterdon57 min
Aug 9, 4:33 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Somerset57 min
Aug 9, 4:57 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth78 min
Aug 9, 5:06 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Somerset3 hr
Aug 9, 5:08 PM EDTSpecial Weather StatementPHIMercer, Middlesex, Monmouth2 hr
Aug 9, 5:26 PM EDTFlash Flood WarningPHIHunterdon, Mercer2 hr
Aug 9, 5:48 PM EDTAreal Flood AdvisoryPHIMiddlesex2 hr
Aug 9, 6:17 PM EDTFlash Flood WarningPHIMiddlesex88 min
Aug 9, 1:00 PM EDTSpecial Weather StatementPHILehigh60 min
Aug 9, 1:22 PM EDTSevere Thunderstorm WarningPHIBucks, Montgomery68 min
Aug 9, 1:26 PM EDTAreal Flood AdvisoryPHIBucks, Montgomery3 hr
Aug 9, 1:33 PM EDTSpecial Weather StatementPHINorthampton57 min
Aug 9, 1:42 PM EDTSpecial Weather StatementPHIMonroe63 min
Aug 9, 1:45 PM EDTSpecial Weather StatementPHIBerks60 min
Aug 9, 2:13 PM EDTSevere Thunderstorm WarningPHIBerks77 min
Aug 9, 3:03 PM EDTSpecial Weather StatementPHIMonroe87 min
Aug 9, 3:05 PM EDTSpecial Weather StatementPHIChester, Montgomery85 min
Aug 9, 3:11 PM EDTAreal Flood AdvisoryPHICarbon, Monroe6 hr
Aug 9, 3:20 PM EDTSevere Thunderstorm WarningPHIChester, Montgomery55 min
Aug 9, 3:39 PM EDTSpecial Weather StatementPHIBucks66 min
Aug 9, 3:57 PM EDTAreal Flood AdvisoryPHIChester, Montgomery104 min
Aug 9, 3:57 PM EDTSevere Thunderstorm WarningPHIBucks, Montgomery63 min
Aug 9, 7:01 PM EDTSpecial Weather StatementPHIBerks59 min
Aug 9, 7:10 PM EDTSevere Thunderstorm WarningPHIBerks, Carbon, Lehigh80 min
Aug 9, 7:40 PM EDTSpecial Weather StatementPHICarbon, Monroe95 min
Aug 9, 7:46 PM EDTAreal Flood AdvisoryPHIBerks3 hr
Aug 9, 1:04 PM EDTSevere Thunderstorm WarningPHIKent23 min
Aug 9, 1:17 PM EDTSevere Thunderstorm WarningPHISussex43 min
Aug 9, 1:39 PM EDTSpecial Weather StatementPHIKent66 min
Aug 9, 1:55 PM EDTSevere Thunderstorm WarningPHISussex65 min
Aug 9, 2:04 PM EDTSpecial Weather StatementPHIKent56 min
Aug 9, 2:19 PM EDTSevere Thunderstorm WarningPHISussex56 min
Aug 9, 2:23 PM EDTSpecial Weather StatementPHISussex52 min
Aug 9, 3:17 PM EDTSpecial Weather StatementPHISussex88 min
Aug 9, 3:42 PM EDTAreal Flood AdvisoryPHISussex119 min
Aug 9, 1:47 PM EDTSpecial Weather StatementPHICecil88 min

Nearby

Special Weather Statements in Delaware, 2012Every special weather statement 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; radar from the NEXRAD Level II archive.