Alert archive / Maryland / Special Weather Statements in 2016

Special Weather Statement, NWS Philadelphia/Mount Holly

July 20, 2016Caroline County, Maryland; Kent County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 20, 2016, 12:31 AM EDT for Caroline County, Maryland; Kent County, Delaware. It was in force for 44 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
Jul 20, 2016, 12:31 AM EDT (04:31 UTC)
Expired
Jul 20, 2016, 1:15 AM EDT
In force
44 min
Issued by
NWS Philadelphia/Mount Holly

Counties Kent County, DE, Caroline County, MD

The radar

The Dover AFB radar (KDOX), 26 km from the middle of the area, began a volume at 04:33 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, 4.5 hours before the alert went out and 120 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 2016-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1746 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 2016-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
1746 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1050 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted.

186 
WWUS81 KPHI 200431
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1231 AM EDT WED JUL 20 2016
 
DEZ002-003-MDZ015-019-020-200515-
KENT-INLAND SUSSEX-CAROLINE-TALBOT-QUEEN ANNE'S-
1231 AM EDT WED JUL 20 2016

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHERN KENT...
NORTHWESTERN SUSSEX...SOUTH CENTRAL QUEEN ANNE'S...NORTHERN CAROLINE
AND NORTHEASTERN TALBOT COUNTIES...

AT 1230 AM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM NEAR HAZLETTVILLE TO QUEEN ANNE...AND MOVING SOUTHEAST
AT 10 MPH.

WIND GUSTS UP TO 30 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THESE
STORMS.

LOCATIONS IMPACTED INCLUDE...
DOVER...DENTON...HARRINGTON...CAMDEN...GREENSBORO...OAKLAND...
RIDGELY...GOLDSBORO...QUEEN ANNE...WOODSIDE...VIOLA...HARTLY...
RISING SUN...HAZLETTVILLE...DOVER SPEEDWAY...JUMPTOWN...
DOVER BASE HOUSING...SANDTOWN...RISING SUN-LEBANON AND WYOMING.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 3876 7575 3892 7599 3921 7568 3917 7541
      3911 7540
TIME...MOT...LOC 0430Z 312DEG 9KT 3917 7564 3892 7595 
$$

ROBERTSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 1:21 AM EDTSpecial Marine WarningPHI54 min
Jul 20, 2:01 AM EDTSpecial Marine WarningPHI59 min
Jul 20, 2:54 AM EDTSpecial Marine WarningPHI66 min
Jul 20, 3:08 AM EDTSpecial Weather StatementPHIGloucester52 min
Jul 20, 3:14 AM EDTSpecial Marine WarningPHI46 min
Jul 20, 3:44 AM EDTSpecial Marine WarningPHI91 min
Jul 20, 3:49 AM EDTSpecial Weather StatementPHICumberland86 min
Jul 19, 11:06 PM EDTSpecial Weather StatementPHITalbot24 min
Jul 19, 11:08 PM EDTSpecial Weather StatementPHIKent, Queen Anne's37 min
Jul 19, 11:15 PM EDTSevere Thunderstorm WarningPHIQueen Anne's, Talbot60 min
Jul 19, 11:35 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's, Talbot55 min
Jul 19, 11:41 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's49 min
Jul 20, 12:15 AM EDTAreal Flood AdvisoryPHICaroline, Kent, Queen Anne's, Talbot4 hr
Jul 20, 12:32 AM EDTSpecial Weather StatementPHIQueen Anne's43 min
Jul 20, 1:11 AM EDTSpecial Weather StatementPHICaroline49 min
Jul 20, 1:14 AM EDTSpecial Weather StatementPHIQueen Anne's46 min
Jul 20, 1:17 AM EDTSpecial Weather StatementPHICaroline43 min
Jul 20, 1:50 AM EDTSpecial Weather StatementPHISussex40 min
Jul 20, 1:53 AM EDTSpecial Weather StatementPHISussex22 min
Jul 20, 1:55 AM EDTSpecial Weather StatementPHISussex35 min
Jul 20, 2:04 AM EDTSevere Thunderstorm WarningPHISussex56 min
Jul 20, 2:56 AM EDTSpecial Weather StatementPHISussex64 min
Jul 20, 3:22 AM EDTSevere Thunderstorm WarningPHISussex33 min
Jul 20, 4:11 AM EDTSpecial Weather StatementPHISussex49 min

Nearby

Special Weather Statements in Maryland, 2016Special Weather Statements in Delaware, 2016Every special weather statement in 2016

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.