Alert archive / Delaware / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

October 29, 2012Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 29, 2012, 2:46 PM EDT for Kent County, Sussex County, Delaware. It was in force for 119 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 29, 2012, 2:46 PM EDT (18:46 UTC)
Expired: Oct 29, 2012, 4:45 PM EDT
In force: 119 min
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, Sussex County, DE

The radar

The Dover AFB radar (KDOX), 5 km from the middle of the area, began a volume at 18:48 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 12:00Z, 6.8 hours before the alert went out and 97 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 487 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 152 m²/s²
0-3 km storm-relative helicity: 583 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.

518 
WWUS81 KPHI 291846
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
246 PM EDT MON OCT 29 2012

DEZ002>004-292045-
DELAWARE BEACHES DE-INLAND SUSSEX DE-KENT DE-
246 PM EDT MON OCT 29 2012

...BANDS OF HEAVY SHOWERS WITH WIND GUSTS OVER 70 MPH WILL AFFECT 
PORTIONS KENT AND SUSSEX COUNTIES...

AT 235 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
BANDS OF HEAVY RAIN WITH STRONG TO DAMAGING WINDS ALONG A LINE 
EXTENDING FROM 24 MILES SOUTH OF OCEAN CITY TO 50 MILES EAST OF 
GEORGETOWN. THE BANDS OF HEAVY RAIN AND STRONG WINDS WERE MOVING 
TOWARD SOUTHERN AND CENTRAL DELAWARE.

WIND GUSTS OVER 70 MPH ARE POSSIBLE OVER SUSSEX COUNTY AND PORTIONS 
OF SOUTHERN KENT COUNTY BETWEEN 330 PM AND 430 PM...WITH THE HIGHEST 
GUSTS ALONG THE COAST OF SUSSEX COUNTY.

VERY HEAVY RAINFALL WILL OCCUR OVER AREAS THAT RECEIVED HEAVY RAINS 
EARLIER. THE ADDITIONAL HEAVY RAIN MAY WEAKEN TREE ROOT SYSTEMS... 
RESULTING IN DOWN TREES AND POWER LINES.

LAT...LON 3845 7560 3847 7570 3914 7575 3922 7570
      3910 7539 3906 7538 3898 7530 3892 7530
      3880 7517 3880 7508 3861 7504 3845 7505

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 29, 3:12 AM EDT	Areal Flood Advisory	PHI	Cape May	3 hr
Oct 29, 6:33 AM EDT	Areal Flood Warning	PHI	Atlantic, Cape May, Cumberland, Salem	28 hr
Oct 29, 7:35 AM EDT	Areal Flood Warning	PHI	Burlington, Camden, Gloucester, Ocean	24 hr
Oct 29, 2:18 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May, Ocean	117 min
Oct 29, 3:15 PM EDT	Special Weather Statement	PHI	Monmouth	2 hr
Oct 29, 4:09 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	111 min
Oct 29, 4:28 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Cumberland, Gloucester, Hunterdon, Mercer and 3 more	2 hr
Oct 29, 7:40 AM EDT	Areal Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	23 hr
Oct 29, 11:15 AM EDT	River Flood Warning	PHI	Chester, Delaware	33 hr
Oct 29, 11:21 AM EDT	River Flood Warning	PHI	Chester	21 hr
Oct 29, 11:29 AM EDT	River Flood Warning	PHI	Delaware	19 hr
Oct 29, 11:34 AM EDT	River Flood Warning	PHI	Bucks	18 hr
Oct 29, 11:34 AM EDT	River Flood Warning	PHI	Montgomery	18 hr
Oct 29, 4:48 PM EDT	Areal Flood Warning	PHI	Berks	14 hr
Oct 29, 6:10 AM EDT	Areal Flood Warning	PHI	Kent, Sussex	28 hr
Oct 29, 6:37 AM EDT	Areal Flood Warning	PHI	New Castle	28 hr
Oct 29, 8:32 AM EDT	River Flood Warning	PHI	New Castle	21 hr
Oct 29, 11:15 AM EDT	River Flood Warning	PHI	New Castle	26 hr
Oct 29, 11:42 AM EDT	River Flood Warning	PHI	New Castle	18 hr
Oct 29, 11:48 AM EDT	River Flood Warning	PHI	New Castle	18 hr

Nearby

Special Weather Statements in Delaware, 2012 Every 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.