Alert archive / Delaware / Special Weather Statements in 2017
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Jun 19, 2017, 8:45 PM EDT for Sussex County, Delaware. It was in force for 30 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
- Jun 19, 2017, 8:45 PM EDT (00:45 UTC)
- Expired
- Jun 19, 2017, 9:15 PM EDT
- In force
- 30 min
- Issued by
- NWS Philadelphia/Mount Holly
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 13 km from the middle of the area, began a volume at 00:48 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 00:00Z, 0.8 hours before the alert went out and 109 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
- 1394 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1009 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 162 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 8.5
The text
As transmitted.
141
WWUS81 KPHI 200045
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
845 PM EDT MON JUN 19 2017
DEZ002-003-200115-
Inland Sussex-Kent-
845 PM EDT MON JUN 19 2017
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN SUSSEX AND
SOUTHEASTERN KENT COUNTIES...
At 844 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Andrewsville to 6 miles southwest of
Ellendale to near Bridgeville. Movement was northeast at 50 mph.
Winds up to 40 mph are possible with these storms.
These storms will be near...
Milford and Milton around 900 PM EDT.
Big Stone Beach around 910 PM EDT.
Other locations impacted by these storms include Houston.
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 10 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
stations and available television stations for additional information
and possible warnings from the National Weather Service.
LAT...LON 3886 7538 3890 7556 3904 7537 3903 7534
3898 7531 3895 7532 3894 7531 3893 7532
3891 7531 3881 7520 3874 7529
TIME...MOT...LOC 0044Z 226DEG 44KT 3881 7562 3876 7552 3873 7553
$$
DragThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 9:05 PM EDT | Special Marine Warning | PHI | 55 min | |
| Jun 19, 9:08 PM EDT | Special Weather Statement | PHI | Cape May | 37 min |
| Jun 19, 9:51 PM EDT | Special Marine Warning | PHI | 54 min | |
| Jun 19, 9:57 PM EDT | Special Weather Statement | PHI | Atlantic, Cumberland | 63 min |
| Jun 19, 8:32 PM EDT | Areal Flood Advisory | PHI | Caroline, Kent, Queen Anne's, Talbot | 3 hr |
| Jun 19, 8:12 PM EDT | Special Weather Statement | PHI | Sussex | 48 min |
| Jun 19, 8:20 PM EDT | Flash Flood Warning | PHI | Sussex | 3 hr |
| Jun 19, 8:24 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 36 min |
Nearby
Special Weather Statements in Delaware, 2017Every special weather statement in 2017
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.