Alert archive / Maryland / Special Weather Statements in 2017
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at May 20, 2017, 12:09 AM EDT for Caroline County, Maryland; Kent County, Delaware. It was in force for 21 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
- May 20, 2017, 12:09 AM EDT (04:09 UTC)
- Expired
- May 20, 2017, 12:30 AM EDT
- In force
- 21 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Kent County, DE, Caroline County, MD
The radar
The Dover AFB radar (KDOX), 28 km from the middle of the area, began a volume at 04:08 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, 4.2 hours before the alert went out and 100 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
- 1860 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 1241 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
The text
As transmitted.
055
WWUS81 KPHI 200409
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
1209 AM EDT SAT MAY 20 2017
DEZ002-003-MDZ019-020-NJZ021-200430-
Inland Sussex-Kent-Talbot-Caroline-Cumberland-
1209 AM EDT SAT MAY 20 2017
...A GUST FRONT WILL AFFECT NORTHWESTERN SUSSEX...
KENT...SOUTHEASTERN TALBOT...CAROLINE AND SOUTHERN CUMBERLAND
COUNTIES...
At 1206 AM EDT, radar indicated a gust front along a line extending
from Hazlettville to Denton to Tanyard. Movement was east at 35 mph.
Winds up to 40 mph are possible with this gust front. Behind the
gust front, scattered thunderstorms with occasional lightning are
expected.
Locations impacted include...
Dover, Easton, Milford, Seaford, Denton, Harrington, Camden,
Federalsburg, Milton, Bridgeville, Greensboro, Cheswold, Trappe,
Preston, Oxford, Ellendale, Bowers, Woodside, Viola and Hartly.
LAT...LON 3864 7571 3869 7577 3868 7580 3871 7584
3868 7594 3857 7602 3863 7608 3864 7615
3868 7617 3868 7621 3871 7622 3890 7584
3924 7570 3921 7540 3907 7541 3901 7533
3893 7532 3887 7526 3878 7530 3852 7570
TIME...MOT...LOC 0406Z 286DEG 29KT 3915 7564 3889 7576 3875 7601
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 9:39 PM EDT | Special Marine Warning | PHI | 66 min | |
| May 19, 9:55 PM EDT | Special Weather Statement | PHI | Cape May, Cumberland | 50 min |
| May 19, 8:13 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 32 min |
| May 19, 8:47 PM EDT | Special Weather Statement | PHI | Caroline, Talbot | 43 min |
| May 19, 11:51 PM EDT | Special Weather Statement | PHI | Queen Anne's | 24 min |
| May 19, 9:24 PM EDT | Special Weather Statement | PHI | Kent | 36 min |
| May 19, 10:00 PM EDT | Special Weather Statement | PHI | Sussex | 30 min |
| May 19, 10:35 PM EDT | Special Weather Statement | PHI | Sussex | 25 min |
Nearby
Special Weather Statements in Maryland, 2017Special 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.