Alert archive / Maryland / Special Weather Statements in 2018
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Aug 8, 2018, 10:42 PM EDT for New Castle County, Delaware; Cecil County, Kent County, Maryland. It was in force for 63 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 8, 2018, 10:42 PM EDT (02:42 UTC)
- Expired
- Aug 8, 2018, 11:45 PM EDT
- In force
- 63 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties New Castle County, DE, Cecil County, MD, Kent County, MD
The radar
The Dover AFB radar (KDOX), 88 km from the middle of the area, began a volume at 02:43 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
Washington/Dulle, VA (KIAD), launched 00:00Z, 2.7 hours before the alert went out and 152 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.
- Mixed-layer CAPE
- 1465 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1224 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.4
The text
As transmitted.
320
WWUS81 KPHI 090242
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
1042 PM EDT WED AUG 8 2018
DEZ001-002-MDZ008-012-015-PAZ101-102-090345-
Kent-New Castle-Queen Anne's-Cecil-Kent-Western Chester-Eastern
Chester-
1042 PM EDT WED AUG 8 2018
...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT NEW CASTLE...NORTHERN
KENT...NORTHEASTERN QUEEN ANNE'S...KENT...CECIL AND SOUTHWESTERN
CHESTER COUNTIES...
At 1042 PM EDT, a cluster of strong thunderstorms was over Bel Air
North, or 13 miles west of Aberdeen, moving east at 40 mph.
Winds up to 40 mph are possible with this storm.
Locations impacted include...
Wilmington, Newark, Middletown, Elkton, Havre De Grace, Calvert,
Smyrna, Elsmere, Kennett Square, New Castle, Chestertown, Oxford,
North East, Clayton, West Grove, Rising Sun, Delaware City, Cheswold,
Rock Hall and Charlestown.
Torrential rainfall is also occurring with this storm, 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 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 3932 7618 3942 7600 3952 7598 3955 7609
3972 7623 3973 7610 3987 7600 3992 7555
3986 7560 3983 7552 3971 7549 3965 7559
3961 7556 3962 7561 3958 7556 3958 7557
3946 7559 3924 7540 3912 7625 3917 7628
TIME...MOT...LOC 0242Z 270DEG 33KT 3957 7641
$$
MeolaThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 8:09 PM EDT | Areal Flood Advisory | PHI | Burlington, Mercer, Monmouth | 3 hr |
| Aug 8, 9:58 PM EDT | Special Weather Statement | PHI | Monmouth | 32 min |
| Aug 9, 2:06 AM EDT | Special Weather Statement | PHI | Morris | 24 min |
| Aug 9, 5:29 PM EDT | Coastal Flood Advisory | PHI | Burlington, Mercer | 10 hr |
| Aug 9, 12:03 AM EDT | Special Weather Statement | PHI | Kent | 57 min |
Nearby
Special Weather Statements in Maryland, 2018Special Weather Statements in Delaware, 2018Every special weather statement in 2018
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.