Alert archive / Delaware / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 23, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 6, 2017, 1:08 PM EDT for Kent County, New Castle County, Sussex County, Delaware; Caroline County, Talbot County, Maryland. It was in force for 40 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
- Apr 6, 2017, 1:08 PM EDT (17:08 UTC)
- Expired
- Apr 6, 2017, 1:48 PM EDT
- In force
- 40 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Talbot County, MD
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 6, 12:45 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 5.1 hours before the alert went out and 92 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
- 61 J/kg
- Mixed-layer CIN
- -145 J/kg
- Mixed-layer LCL
- 1205 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
381
WUUS51 KPHI 061708
SVRPHI
DEC001-003-005-MDC011-041-061800-
/O.NEW.KPHI.SV.W.0023.170406T1708Z-170406T1800Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
108 PM EDT THU APR 6 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Sussex County in southern Delaware...
South central New Castle County in northern Delaware...
Kent County in central Delaware...
Southeastern Talbot County in eastern Maryland...
Caroline County in eastern Maryland...
* Until 200 PM EDT
* At 108 PM EDT, severe thunderstorms were located along a line
extending from 6 miles south of Secretary to near Vienna to 11
miles southwest of Hebron to near Deal Island to Tylerton, moving
northeast at 60 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near,
Choptank and Windyhill around 115 PM EDT.
Federalsburg and Preston around 120 PM EDT.
Agner, Smithville and Harmony around 125 PM EDT.
Seaford, Denton, Bridgeville and Delmar around 130 PM EDT.
Laurel and Andrewsville around 135 PM EDT.
Harrington and Ellendale around 140 PM EDT.
Georgetown, Milford, Woodside, Viola and Hazlettville around 145
PM EDT.
Dover, Camden, Bowers, Sycamore, Dover Base Housing, Rising
Sun-Lebanon, Rising Sun and Dover Speedway around 150 PM EDT.
Other locations impacted by these severe thunderstorms include
Kenton, Leipsic, Chambersville, Rodney Village, Blades, Greenwood,
Wyoming, Kent Acres, Magnolia and Riverview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Seek shelter in an interior room on the lowest floor of a well-built
structure. Abandon vehicles in search of a more substantial
permanent structure. Stay away from windows.
In addition to hail and 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.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3846 7569 3864 7571 3869 7577 3868 7580
3870 7580 3871 7584 3868 7593 3860 7599
3857 7604 3858 7604 3941 7560 3926 7537
3905 7537 3890 7526 3847 7528 3845 7531
TIME...MOT...LOC 1708Z 212DEG 63KT 3851 7597 3846 7590 3833 7586 3815
7588 3797 7600
HAIL...0.75IN
WIND...60MPH
$$
332 follow-up statements
421
WWUS51 KPHI 061737
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
137 PM EDT THU APR 6 2017
MDC041-061746-
/O.CAN.KPHI.SV.W.0023.000000T0000Z-170406T1800Z/
Talbot MD-
137 PM EDT THU APR 6 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN TALBOT COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A severe thunderstorm watch remains in effect until 500 PM EDT for
central, northern and southern Delaware...and eastern Maryland.
LAT...LON 3846 7569 3875 7572 3890 7585 3941 7560
3926 7537 3905 7537 3890 7526 3847 7528
3845 7531
TIME...MOT...LOC 1736Z 270DEG 63KT 3888 7563 3883 7556 3870 7552 3852
7554 3834 7566
$$
DEC001-003-005-MDC011-061800-
/O.CON.KPHI.SV.W.0023.000000T0000Z-170406T1800Z/
Sussex DE-New Castle DE-Kent DE-Caroline MD-
137 PM EDT THU APR 6 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM EDT
FOR SUSSEX...SOUTH CENTRAL NEW CASTLE...KENT AND NORTHEASTERN
CAROLINE COUNTIES...
At 136 PM EDT, severe thunderstorms were located along a line
extending from Andrewsville to 6 miles south of Harrington to near
Bridgeville to near Laurel to near Fruitland, moving northeast at 60
mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Georgetown and Ellendale around 140 PM EDT.
Milford, Millsboro, Milton and Gumboro around 145 PM EDT.
Other locations impacted by these severe thunderstorms include
Kenton, Leipsic, Chambersville, Rodney Village, Blades, Greenwood,
Wyoming, Kent Acres, Magnolia and Riverview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3846 7569 3875 7572 3890 7585 3941 7560
3926 7537 3905 7537 3890 7526 3847 7528
3845 7531
TIME...MOT...LOC 1736Z 270DEG 63KT 3888 7563 3883 7556 3870 7552 3852
7554 3834 7566
HAIL...0.75IN
WIND...60MPH
$$
33301
WWUS51 KPHI 061748
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
148 PM EDT THU APR 6 2017
DEC001-003-005-MDC011-061757-
/O.CAN.KPHI.SV.W.0023.000000T0000Z-170406T1800Z/
Sussex DE-New Castle DE-Kent DE-Caroline MD-
148 PM EDT THU APR 6 2017
...THE SEVERE THUNDERSTORM WARNING FOR SUSSEX...SOUTH CENTRAL NEW
CASTLE...KENT AND NORTHEASTERN CAROLINE COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning has been cancelled. However gusty winds and
heavy rain are still possible with these thunderstorms.
A severe thunderstorm watch remains in effect until 500 PM EDT for
central, northern and southern Delaware...and eastern Maryland.
LAT...LON 3846 7569 3875 7572 3890 7585 3941 7560
3926 7537 3905 7537 3890 7526 3847 7528
3845 7531
TIME...MOT...LOC 1743Z 212DEG 63KT 3899 7554 3894 7547 3881 7543 3863
7545 3845 7557
$$
33The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 12:17 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 24 min |
| Apr 6, 1:00 PM EDT | Special Weather Statement | PHI | Kent, Sussex | 60 min |
| Apr 6, 2:07 PM EDT | Special Weather Statement | PHI | Kent, Sussex | 53 min |
| Apr 6, 2:56 PM EDT | Special Weather Statement | PHI | Kent, New Castle | 64 min |
| Apr 6, 11:58 AM EDT | Areal Flood Advisory | PHI | Cecil, Kent | 4 hr |
| Apr 6, 11:59 AM EDT | Special Weather Statement | PHI | Caroline | 31 min |
| Apr 6, 2:13 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's, Talbot | 47 min |
| Apr 6, 4:02 PM EDT | Areal Flood Advisory | PHI | Cecil, Kent | 6 hr |
| Apr 6, 4:41 PM EDT | Special Weather Statement | PHI | Talbot | 34 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2017Severe Thunderstorm Warnings in Maryland, 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.