Alert archive / Delaware / Special Weather Statements in 2010

Special Weather Statement, NWS Philadelphia/Mount Holly

October 27, 2010Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 27, 2010, 11:10 PM EDT for Sussex County, Delaware. It was in force for 50 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: Oct 27, 2010, 11:10 PM EDT (03:10 UTC)
Expired: Oct 28, 2010, 12:00 AM EDT
In force: 50 min
Issued by: NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 37 km from the middle of the area, began a volume at 03:13 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, 3.2 hours before the alert went out and 74 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 660 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 983 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

499 
WWUS81 KPHI 280310
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1110 PM EDT WED OCT 27 2010

DEZ003-004-280400-
DELAWARE BEACHES DE-INLAND SUSSEX DE-
1110 PM EDT WED OCT 27 2010

...THUNDERSTORM WILL CONTINUE TO AFFECT SOUTHEASTERN SUSSEX COUNTY...

AT 1110 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH HEAVY RAIN OVER SOUTHEASTERN SUSSEX COUNTY. THE 
THUNDERSTORMS WILL CONTINUE TO AFFECT THE AREA THROUGH MIDNIGHT.

VERY HEAVY RAIN WILL FALL FROM THESE STORMS AND IT WILL CAUSE WATER 
TO POND ON ROADS AND IN AREAS OF POOR DRAINAGE.

WIND GUSTS TO 40 MPH ARE POSSIBLE.

LAT...LON 3845 7538 3853 7542 3867 7512 3864 7509
      3865 7508 3868 7508 3870 7506 3847 7503
      3844 7505

$$

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 27, 8:00 PM EDT	Small Craft Advisory	PHI		7 hr
Oct 27, 9:19 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Gloucester	56 min
Oct 27, 10:15 PM EDT	Special Weather Statement	PHI	Monmouth	45 min
Oct 27, 10:36 PM EDT	Special Marine Warning	PHI		24 min
Oct 28, 3:15 AM EDT	Small Craft Advisory for Hazardous Seas	PHI		12 hr
Oct 28, 3:13 PM EDT	Small Craft Advisory	PHI		4 days
Oct 27, 8:37 PM EDT	Special Weather Statement	PHI	Talbot	53 min
Oct 27, 9:06 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	54 min
Oct 27, 10:48 PM EDT	Special Weather Statement	PHI	Sussex	27 min

Nearby

Special Weather Statements in Delaware, 2010 Every special weather statement in 2010

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.