Alert archive / Maryland / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 86, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 13, 2017, 5:14 PM EDT for Kent County, Delaware; Caroline County, Kent County, Queen Anne's County, Maryland. It was in force for 46 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
- Jul 13, 2017, 5:14 PM EDT (21:14 UTC)
- Expired
- Jul 13, 2017, 6:00 PM EDT
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kent County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 61 km from the middle of the area, began a volume at 21:15 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, 9.2 hours before the alert went out and 119 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
- 135 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 1715 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
722
WUUS51 KPHI 132114
SVRPHI
DEC001-MDC011-029-035-132200-
/O.NEW.KPHI.SV.W.0086.170713T2114Z-170713T2200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
514 PM EDT THU JUL 13 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Western Kent County in central Delaware...
Queen Anne's County in northeastern Maryland...
Northeastern Caroline County in eastern Maryland...
Central Kent County in northeastern Maryland...
* Until 600 PM EDT
* At 514 PM EDT, a severe thunderstorm was located over Old Town, or
near Centerville, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Centerville, Chestertown, Centreville, Greensboro, Oakland,
Ridgely, Church Hill, Millington, Sudlersville, Goldsboro, Hartly,
Old Town, Grasonville, Starr, Jumptown, Hazlettville, Morgnec,
Crumpton, Sandtown and Langford.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to damaging winds...frequent cloud to ground lightning
is occurring with this storm. Move indoors immediately.
Remember...if you can hear thunder...you are close enough to be
struck by lightning.
&&
LAT...LON 3898 7628 3897 7622 3900 7617 3903 7624
3909 7623 3911 7625 3921 7617 3932 7576
3929 7576 3930 7570 3929 7565 3894 7558
3896 7629
TIME...MOT...LOC 2114Z 258DEG 32KT 3911 7614
HAIL...<.75IN
WIND...60MPH
$$
JRK2 follow-up statements
314
WWUS51 KPHI 132143 RRA
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
543 PM EDT THU JUL 13 2017
DEC001-MDC011-029-035-132200-
/O.CON.KPHI.SV.W.0086.000000T0000Z-170713T2200Z/
Kent DE-Queen Anne's MD-Caroline MD-Kent MD-
543 PM EDT THU JUL 13 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR WESTERN KENT...NORTHEASTERN QUEEN ANNE'S...NORTHEASTERN CAROLINE
AND EAST CENTRAL KENT COUNTIES...
At 542 PM EDT, severe thunderstorms were located along a line
extending from Sudlersville to near Centerville, moving east at 35
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Centerville, Centreville, Greensboro, Oakland, Ridgely, Millington,
Sudlersville, Goldsboro, Hartly, Starr, Jumptown, Hazlettville,
Sandtown, Carville, Hope, Kenton, Henderson, Marydel, Templeville and
Barclay.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to damaging winds...frequent cloud to ground lightning
is occurring with this storm. Move indoors immediately.
Remember...if you can hear thunder...you are close enough to be
struck by lightning.
&&
LAT...LON 3896 7615 3908 7606 3910 7597 3923 7591
3930 7570 3929 7565 3894 7558
TIME...MOT...LOC 2142Z 258DEG 30KT 3919 7585 3899 7607
HAIL...<.75IN
WIND...60MPH
$$
JRK249
WWUS51 KPHI 132157
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
557 PM EDT THU JUL 13 2017
DEC001-MDC011-029-035-132206-
/O.EXP.KPHI.SV.W.0086.000000T0000Z-170713T2200Z/
Kent DE-Queen Anne's MD-Caroline MD-Kent MD-
557 PM EDT THU JUL 13 2017
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN KENT...NORTHEASTERN
QUEEN ANNE'S...NORTHEASTERN CAROLINE AND EAST CENTRAL KENT COUNTIES
WILL EXPIRE AT 600 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire. However gusty winds
to 45 mph are still possible with these thunderstorms.
LAT...LON 3896 7615 3908 7606 3910 7597 3923 7591
3930 7570 3929 7565 3894 7558
TIME...MOT...LOC 2156Z 258DEG 32KT 3921 7571 3901 7593
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 4:50 PM EDT | Special Weather Statement | PHI | Queen Anne's | 40 min |
| Jul 13, 7:23 PM EDT | Special Weather Statement | PHI | Kent | 52 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2017Severe Thunderstorm Warnings in Delaware, 2017Every severe thunderstorm warning 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.