Alert archive / Delaware / Special Weather Statements in 2018
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Aug 18, 2018, 9:49 PM EDT for Kent County, Delaware. It was in force for 26 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 18, 2018, 9:49 PM EDT (01:49 UTC)
- Expired
- Aug 18, 2018, 10:15 PM EDT
- In force
- 26 min
- Issued by
- NWS Philadelphia/Mount Holly
County Kent County, DE
The radar
The Dover AFB radar (KDOX), 22 km from the middle of the area, began a volume at 01:49 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, 1.8 hours before the alert went out and 122 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
- 1988 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 748 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.2
The text
As transmitted.
654
WWUS81 KPHI 190149
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
949 PM EDT SAT AUG 18 2018
DEZ002-190215-
Kent-
949 PM EDT SAT AUG 18 2018
...A STRONG THUNDERSTORM WILL AFFECT CENTRAL KENT COUNTY...
At 949 PM EDT, a strong thunderstorm was located over Rising
Sun-Lebanon, or near Dover, moving east at 15 mph.
Winds up to 40 mph are possible with this storm.
This storm will be near...
Bowers around 1010 PM EDT.
Big Stone Beach around 1015 PM EDT.
Other locations impacted by this storm include Highland Acres,
Felton, Rodney Village, Woodside East, Frederica, Wyoming, Little
Creek, Kent Acres, Magnolia and Riverview.
Torrential rainfall is occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is also occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 3900 7562 3905 7567 3913 7557 3919 7554
3917 7541 3907 7541 3903 7534 3897 7531
3895 7536 3896 7536 3895 7537 3896 7539
3893 7542
TIME...MOT...LOC 0149Z 291DEG 15KT 3908 7550
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 8:52 PM EDT | Special Weather Statement | PHI | Ocean | 23 min |
| Aug 18, 9:07 PM EDT | Special Marine Warning | PHI | 83 min | |
| Aug 18, 9:23 PM EDT | Special Marine Warning | PHI | 97 min | |
| Aug 19, 1:03 AM EDT | Areal Flood Advisory | PHI | Cape May | 4 hr |
| Aug 19, 3:31 AM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Ocean | 101 min |
| Aug 19, 4:11 AM EDT | Areal Flood Warning | PHI | Ocean | 4 hr |
| Aug 19, 10:00 AM EDT | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 110 min |
| Aug 19, 2:05 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware | 8 hr |
| Aug 19, 1:11 AM EDT | Areal Flood Advisory | PHI | Kent, Sussex | 3 hr |
Nearby
Special 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.