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, 1:11 AM EDT for Caroline County, Maryland; Kent County, Delaware. It was in force for 49 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, 1:11 AM EDT (05:11 UTC)
Expired
Jul 20, 2016, 2:00 AM EDT
In force
49 min
Issued by
NWS Philadelphia/Mount Holly

Counties Kent County, DE, Caroline County, MD

The radar

The Dover AFB radar (KDOX), 16 km from the middle of the area, began a volume at 05:15 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, 5.2 hours before the alert went out and 102 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.

226 
WWUS81 KPHI 200511
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
111 AM EDT WED JUL 20 2016
 
DEZ002-003-MDZ019-020-200600-
KENT-INLAND SUSSEX-CAROLINE-TALBOT-
111 AM EDT WED JUL 20 2016

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHERN KENT...
NORTHWESTERN SUSSEX...EAST CENTRAL TALBOT AND CAROLINE COUNTIES...

AT 111 AM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM RISING SUN TO TANYARD...AND MOVING SOUTHEAST AT 20
MPH.

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

LOCATIONS IMPACTED INCLUDE...
DOVER...EASTON...MILFORD...SEAFORD...DENTON...HARRINGTON...CAMDEN...
FEDERALSBURG...BRIDGEVILLE...GREENSBORO...PRESTON...BOWERS...
WOODSIDE...VIOLA...CHOPTANK...HARMONY...ANDREWSVILLE...AGNER...
RISING SUN AND TANYARD.

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 3865 7571 3869 7577 3868 7580 3870 7580
      3871 7584 3867 7595 3875 7609 3917 7554
      3911 7540 3907 7541 3903 7534 3898 7531
      3893 7532 3891 7530 3860 7570
TIME...MOT...LOC 0511Z 299DEG 15KT 3909 7551 3874 7599 
$$

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, 12:31 AM EDTSpecial Weather StatementPHICaroline44 min
Jul 20, 12:32 AM EDTSpecial Weather StatementPHIQueen Anne's43 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.