Alert archive / Maryland / Special Weather Statements in 2015
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Jun 20, 2015, 5:18 PM EDT for Cecil County, Maryland. It was in force for 42 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 20, 2015, 5:18 PM EDT (21:18 UTC)
- Expired
- Jun 20, 2015, 6:00 PM EDT
- In force
- 42 min
- Issued by
- NWS Philadelphia/Mount Holly
County Cecil County, MD
The radar
The Dover AFB radar (KDOX), 62 km from the middle of the area, began a volume at 21:21 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 12:00Z, 9.3 hours before the alert went out and 143 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
- 30 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 1169 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
028
WWUS81 KPHI 202118
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
518 PM EDT SAT JUN 20 2015
DEZ001-002-MDZ008-012-202200-
KENT-NEW CASTLE-CECIL-KENT-KENT-CECIL-
518 PM EDT SAT JUN 20 2015
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN NEW CASTLE...
NORTHWESTERN KENT...NORTHEASTERN QUEEN ANNE'S...NORTHEASTERN KENT AND
SOUTHEASTERN CECIL COUNTIES...
AT 518 PM EDT...A STRONG THUNDERSTORM WAS OVER MILLINGTON...OR 13
MILES SOUTHWEST OF MIDDLETOWN...MOVING NORTHEAST AT 20 MPH.
WIND GUSTS UP TO 30 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS
STORM.
LOCATIONS IMPACTED INCLUDE...
SMYRNA...CLAYTON...MILLINGTON...SASSAFRAS...DELANEY CORNER...
MASSEY...GREEN SPRING AND GALENA.
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY CAUSE
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
LAT...LON 3942 7575 3929 7562 3924 7578 3924 7580
3926 7585 3925 7588 3930 7600
TIME...MOT...LOC 2118Z 236DEG 17KT 3929 7586
$$
AMCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 3:47 AM EDT | Small Craft Advisory | PHI | 40 hr | |
| Jun 20, 7:01 PM EDT | Special Weather Statement | PHI | Salem | 29 min |
| Jun 20, 5:28 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 47 min |
| Jun 20, 6:07 PM EDT | Areal Flood Advisory | PHI | Cecil, Kent, Queen Anne's | 3 hr |
| Jun 20, 5:04 PM EDT | Special Weather Statement | PHI | New Castle | 26 min |
| Jun 20, 6:18 PM EDT | Special Weather Statement | PHI | New Castle | 42 min |
Nearby
Special Weather Statements in Maryland, 2015Every special weather statement in 2015
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.