Alert archive / Delaware / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 54, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 19, 2017, 5:38 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Talbot County, Maryland. It was in force for 67 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 19, 2017, 5:38 PM EDT (21:38 UTC)
- Expired
- Jun 19, 2017, 6:45 PM EDT
- In force
- 67 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 47 km from the middle of the area, began a volume at 21:38 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 19, 6:00 PM EDT | TSTM WND DMG | Federalsburg, MD | SEVERAL TREES AND WIRES BLOWN DOWN. TIME ESTIMATED FROM RADAR. |
| Jun 19, 6:15 PM EDT | TORNADO | Greenwood, DE | EF-0 TORNADO WITH WINDS OF 85 MPH CONFIRMED NEAR GREENWOOD WITH AN ESTIMATED PATH LENGTH OF 0.6 MILES AND A PATH WIDTH OF 200 YARDS. |
| Jun 19, 6:17 PM EDT | TSTM WND DMG | Saint Johnstown, DE | TREES DOWN NEAR INTERSECTION OF ROUTE 16 AND ST JOHNSTOWN RD. PROBABLE TORNADO. |
| Jun 19, 6:27 PM EDT | TSTM WND DMG | 1 Ene Pondside Acres, DE | DAMAGE TO MOBILE HOME ON AMEILA DR IN CEDAR CREEK ESTATES. PROBABLE TORNADO. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 19, 11:13 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.6 hours before the alert went out and 98 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
- 419 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 1020 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.8
The text
As transmitted.
856
WUUS51 KPHI 192138
SVRPHI
DEC001-005-MDC011-041-192245-
/O.NEW.KPHI.SV.W.0054.170619T2138Z-170619T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
538 PM EDT MON JUN 19 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Sussex County in southern Delaware...
Southern Kent County in central Delaware...
Talbot County in eastern Maryland...
Caroline County in eastern Maryland...
* Until 645 PM EDT
* At 537 PM EDT, severe thunderstorms were located along a line
extending from near Oxford to near Cambridge to 12 miles southeast
of Taylors Island, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Easton, Georgetown, Milford, Seaford, Denton, Millsboro, Laurel,
Harrington, Federalsburg, Milton, Bridgeville, Delmar, Trappe, St.
Michaels, Dagsboro, Preston, Oxford, Ellendale, Bowers and
Smithville.
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.
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 3871 7584 3868 7593
3860 7599 3857 7604 3863 7608 3864 7615
3868 7617 3868 7621 3871 7624 3876 7622
3873 7626 3880 7629 3882 7623 3878 7621
3883 7619 3907 7537 3889 7523 3845 7524
TIME...MOT...LOC 2137Z 259DEG 36KT 3872 7618 3852 7609 3834 7613
HAIL...<.75IN
WIND...60MPH
$$
Meola2 follow-up statements
676
WWUS51 KPHI 192210
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
610 PM EDT MON JUN 19 2017
DEC001-005-MDC011-041-192245-
/O.CON.KPHI.SV.W.0054.000000T0000Z-170619T2245Z/
Sussex DE-Kent DE-Talbot MD-Caroline MD-
610 PM EDT MON JUN 19 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR SUSSEX...SOUTHERN KENT...EAST CENTRAL TALBOT AND SOUTHERN
CAROLINE COUNTIES...
At 609 PM EDT, severe thunderstorms were located along a line
extending from Agner to near Sharptown to near Hebron, moving east at
40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Georgetown, Milford, Seaford, Denton, Millsboro, Laurel, Harrington,
Federalsburg, Milton, Bridgeville, Delmar, Dagsboro, Preston,
Ellendale, Bowers, Smithville, Gumboro, Agner, Andrewsville and
Harmony.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to damaging winds...frequent cloud to ground lightning
is occurring with this storm. Move indoors immediately.
Remember...if you can hear thunder...you are close enough to be
struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3846 7569 3865 7572 3869 7577 3868 7578
3871 7584 3868 7593 3890 7596 3907 7537
3893 7529 3889 7523 3845 7524
TIME...MOT...LOC 2209Z 259DEG 36KT 3878 7579 3858 7570 3840 7575
HAIL...<.75IN
WIND...60MPH
$$
Meola398
WWUS51 KPHI 192238
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
638 PM EDT MON JUN 19 2017
MDC011-041-192247-
/O.CAN.KPHI.SV.W.0054.000000T0000Z-170619T2245Z/
Talbot MD-Caroline MD-
638 PM EDT MON JUN 19 2017
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL TALBOT AND
CAROLINE COUNTIES 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 800 PM EDT for
central and southern Delaware.
LAT...LON 3846 7569 3859 7570 3878 7555 3901 7560
3907 7537 3893 7529 3889 7523 3845 7524
TIME...MOT...LOC 2237Z 241DEG 50KT 3906 7533 3877 7524 3846 7554
$$
DEC001-005-192245-
/O.CON.KPHI.SV.W.0054.000000T0000Z-170619T2245Z/
Sussex DE-Kent DE-
638 PM EDT MON JUN 19 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR SUSSEX AND SOUTHEASTERN KENT COUNTIES...
At 637 PM EDT, severe thunderstorms were located along a line
extending from near Bowers to near Milton to Delmar, moving northeast
at 55 mph.
These are very dangerous storms.
HAZARD...90 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...You are in a life-threatening situation. Flying debris may
be deadly to those caught without shelter. Mobile homes
will be heavily damaged or destroyed. Homes and businesses
will have substantial roof and window damage. Expect
extensive tree damage and power outages.
Locations impacted include...
Georgetown, Milford, Seaford, Millsboro, Laurel, Harrington, Milton,
Delmar, Dagsboro, Ellendale, Bowers, Gumboro, Sycamore, Felton,
Blades, Frankford, Frederica, Houston, Bethel and Riverview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds...frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember...if you can hear thunder...you are close
enough to be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3846 7569 3859 7570 3878 7555 3901 7560
3907 7537 3893 7529 3889 7523 3845 7524
TIME...MOT...LOC 2237Z 241DEG 50KT 3906 7533 3877 7524 3846 7554
HAIL...<.75IN
WIND...90MPH
$$
MeolaThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 4:07 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 38 min |
| Jun 19, 4:07 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 38 min |
| Jun 19, 4:34 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 41 min |
| Jun 19, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 52 min |
| Jun 19, 4:42 PM EDT | Areal Flood Advisory | PHI | New Castle | 3 hr |
| Jun 19, 4:59 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 46 min |
| Jun 19, 5:14 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle, Sussex | 3 hr |
| Jun 19, 5:28 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 62 min |
| Jun 19, 6:17 PM EDT | Tornado Warning | PHI | Kent, Sussex | 16 min |
| Jun 19, 6:52 PM EDT | Special Weather Statement | PHI | Sussex | 23 min |
| Jun 19, 7:30 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 45 min |
| Jun 19, 7:34 PM EDT | Areal Flood Advisory | PHI | Sussex | 3 hr |
| Jun 19, 3:45 PM EDT | Areal Flood Advisory | PHI | Cecil, Kent, Queen Anne's | 3 hr |
| Jun 19, 4:17 PM EDT | Special Weather Statement | PHI | Cecil, Kent, Queen Anne's | 58 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.