Alert archive / Delaware / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 384, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 22, 2019, 10:11 PM EDT for Kent County, New Castle County, Sussex County, Delaware; Caroline County, Kent County, Queen Anne's County, Maryland. It was in force for 64 min. 1 report 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
- Aug 22, 2019, 10:11 PM EDT (02:11 UTC)
- Expired
- Aug 22, 2019, 11:15 PM EDT
- In force
- 64 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 33 km from the middle of the area, began a volume at 02:13 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 |
|---|---|---|---|
| Aug 22, 10:34 PM EDT | TSTM WND DMG | 1 Ene West Dover, DE | DOWNED TREE ON KENTON ROAD NEAR WIMBLEDON DRIVE. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 2.2 hours before the alert went out and 131 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
- 511 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 1530 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
915
WUUS51 KPHI 230211
SVRPHI
DEC001-003-005-MDC011-029-035-230315-
/O.NEW.KPHI.SV.W.0384.190823T0211Z-190823T0315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1011 PM EDT Thu Aug 22 2019
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northeastern Sussex County in southern Delaware...
Southwestern New Castle County in northern Delaware...
Kent County in central Delaware...
Northeastern Queen Anne's County in northeastern Maryland...
Northeastern Caroline County in eastern Maryland...
Northeastern Kent County in northeastern Maryland...
* Until 1115 PM EDT.
* At 1011 PM EDT, severe thunderstorms were located along a line
extending from Millington to near Hartly to Oakland, moving east at
35 mph.
HAZARD...70 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Dover, Smyrna, Milford, Harrington, Camden, Clayton, Greensboro,
Oakland, Ridgely, Cheswold, Millington, Sudlersville, Bowers,
Goldsboro, Woodside, Viola, Hartly, Starr, Hazlettville and Delaney
Corner.
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 these storms. 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 3913 7593 3933 7601 3934 7548 3925 7540
3907 7541 3899 7532 3891 7531 3881 7519
3897 7610
TIME...MOT...LOC 0211Z 274DEG 30KT 3925 7583 3912 7578 3900 7591
HAIL...0.75IN
WIND...70MPH
$$
Staarmann3 follow-up statements
706
WWUS51 KPHI 230238
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1038 PM EDT Thu Aug 22 2019
MDC029-035-230248-
/O.CAN.KPHI.SV.W.0384.000000T0000Z-190823T0315Z/
Queen Anne's MD-Kent MD-
1038 PM EDT Thu Aug 22 2019
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN QUEEN ANNE'S AND
NORTHEASTERN KENT COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3893 7588 3917 7573 3933 7576 3934 7561
3934 7548 3925 7540 3924 7541 3922 7540
3907 7541 3899 7532 3891 7531 3881 7519
TIME...MOT...LOC 0238Z 274DEG 30KT 3924 7556 3910 7551 3899 7564
$$
DEC001-003-005-MDC011-230315-
/O.CON.KPHI.SV.W.0384.000000T0000Z-190823T0315Z/
Sussex DE-New Castle DE-Kent DE-Caroline MD-
1038 PM EDT Thu Aug 22 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT
FOR NORTHEASTERN SUSSEX...SOUTHWESTERN NEW CASTLE...KENT AND
NORTHEASTERN CAROLINE COUNTIES...
At 1038 PM EDT, severe thunderstorms were located along a line
extending from Cheswold to Rising Sun to near Viola, moving east at
35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Dover, Smyrna, Milford, Harrington, Camden, Clayton, Greensboro,
Cheswold, Bowers, Goldsboro, Woodside, Viola, Hartly, Rising
Sun-Lebanon, Woodland Beach, Hazlettville, Delaney Corner, Dover Base
Housing, Dover Speedway and Sandtown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. 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 3893 7588 3917 7573 3933 7576 3934 7561
3934 7548 3925 7540 3924 7541 3922 7540
3907 7541 3899 7532 3891 7531 3881 7519
TIME...MOT...LOC 0238Z 274DEG 30KT 3924 7556 3910 7551 3899 7564
HAIL...0.75IN
WIND...60MPH
$$
Staarmann926
WWUS51 KPHI 230259
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1059 PM EDT Thu Aug 22 2019
DEC003-MDC011-230308-
/O.CAN.KPHI.SV.W.0384.000000T0000Z-190823T0315Z/
New Castle DE-Caroline MD-
1059 PM EDT Thu Aug 22 2019
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NEW CASTLE AND
NORTHEASTERN CAROLINE COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3881 7519 3890 7571 3915 7546 3923 7553
3926 7553 3931 7558 3934 7555 3934 7550
3933 7550 3934 7548 3925 7540 3907 7541
3899 7532 3891 7531
TIME...MOT...LOC 0258Z 274DEG 30KT 3923 7535 3909 7530 3898 7543
$$
DEC001-005-230315-
/O.CON.KPHI.SV.W.0384.000000T0000Z-190823T0315Z/
Sussex DE-Kent DE-
1059 PM EDT Thu Aug 22 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT
FOR NORTHEASTERN SUSSEX AND CENTRAL KENT COUNTIES...
At 1058 PM EDT, severe thunderstorms were located along a line
extending from 9 miles west of Fortesque to near Bowers to near
Milford, moving east at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Dover, Milford, Harrington, Bowers, Viola, Rising Sun-Lebanon,
Woodland Beach, Rising Sun, Dover Base Housing, Felton, Frederica,
Houston, Magnolia, Little Creek, Leipsic, Riverview and Woodside
East.
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 3881 7519 3890 7571 3915 7546 3923 7553
3926 7553 3931 7558 3934 7555 3934 7550
3933 7550 3934 7548 3925 7540 3907 7541
3899 7532 3891 7531
TIME...MOT...LOC 0258Z 274DEG 30KT 3923 7535 3909 7530 3898 7543
HAIL...0.75IN
WIND...60MPH
$$
Staarmann709
WWUS51 KPHI 230307
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1107 PM EDT Thu Aug 22 2019
DEC001-005-230315-
/O.CON.KPHI.SV.W.0384.000000T0000Z-190823T0315Z/
Sussex DE-Kent DE-
1107 PM EDT Thu Aug 22 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT
FOR NORTHEASTERN SUSSEX AND SOUTHEASTERN KENT COUNTIES...
At 1107 PM EDT, a severe thunderstorm was located over Big Stone
Beach, or 16 miles southeast of Dover, moving east at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Milford, Harrington, Bowers, Frederica, Houston, Magnolia and
Riverview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3899 7556 3909 7550 3910 7541 3907 7541
3899 7532 3891 7531 3881 7519 3888 7557
TIME...MOT...LOC 0307Z 286DEG 26KT 3897 7534
HAIL...0.75IN
WIND...60MPH
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 8:54 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 66 min |
| Aug 22, 9:21 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 54 min |
| Aug 22, 11:10 PM EDT | Special Weather Statement | PHI | Kent | 50 min |
| Aug 22, 8:26 PM EDT | Special Weather Statement | PHI | Cecil | 64 min |
| Aug 22, 8:36 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 54 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2019Severe Thunderstorm Warnings in Maryland, 2019Every severe thunderstorm warning in 2019
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.