Alert archive / Delaware / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 362, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 19, 2019, 3:00 PM EDT for Sussex County, Delaware. It was in force for 45 min. 3 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
- Aug 19, 2019, 3:00 PM EDT (19:00 UTC)
- Expired
- Aug 19, 2019, 3:45 PM EDT
- In force
- 45 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 31 km from the middle of the area, began a volume at 19:02 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 19, 3:13 PM EDT | MARINE TSTM WIND 40 | 2 Wnw Lewes, DE | WEATHERFLOW GAUGE. |
| Aug 19, 3:36 PM EDT | HAIL 1.25 | 1 Nw Dewey Beach, DE | |
| Aug 19, 3:39 PM EDT | TSTM WND DMG | 1 W Bethany Beach, DE | DOWNED WIRES ON FAIRWAY 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 12:00Z, 7.0 hours before the alert went out and 83 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
- 1552 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1081 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
217
WUUS51 KPHI 191900
SVRPHI
DEC005-191945-
/O.NEW.KPHI.SV.W.0362.190819T1900Z-190819T1945Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
300 PM EDT Mon Aug 19 2019
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Sussex County in southern Delaware...
* Until 345 PM EDT.
* At 259 PM EDT, a cluster of severe thunderstorms was over eastern
Sussex County and is moving southeast at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Georgetown, Millsboro, Lewes, Milton, Selbyville, Dagsboro,
Millville, Henlopen Acres, Cape Henlopen State Park, Long Neck,
Ocean View, Frankford, South Bethany and Dewey Beach.
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 this storm, and
the storm will affect the beaches. For your safety, immediately move
off the beach and seek shelter indoors.
&&
LAT...LON 3877 7544 3883 7521 3879 7516 3880 7509
3867 7507 3869 7508 3869 7514 3864 7513
3862 7508 3866 7507 3861 7506 3859 7521
3857 7518 3858 7507 3860 7506 3845 7505
3845 7531
TIME...MOT...LOC 1859Z 335DEG 17KT 3857 7505
HAIL...1.00IN
WIND...60MPH
$$
Davis2 follow-up statements
851
WWUS51 KPHI 191931
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
331 PM EDT Mon Aug 19 2019
DEC005-191945-
/O.CON.KPHI.SV.W.0362.000000T0000Z-190819T1945Z/
Sussex DE-
331 PM EDT Mon Aug 19 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR SOUTHEASTERN SUSSEX COUNTY...
At 330 PM EDT, a severe thunderstorm was located 7 miles northeast of
Ocean City, moving southeast at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Millsboro, Lewes, Selbyville, Dagsboro, Millville, Henlopen Acres,
Cape Henlopen State Park, Long Neck, Ocean View, Frankford, South
Bethany and Dewey Beach.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3871 7537 3881 7519 3879 7516 3880 7509
3867 7507 3869 7508 3869 7514 3864 7513
3862 7508 3866 7507 3861 7506 3859 7521
3857 7518 3858 7507 3860 7506 3845 7505
3845 7528
TIME...MOT...LOC 1930Z 335DEG 17KT 3843 7497
HAIL...1.00IN
WIND...60MPH
$$
Davis484
WWUS51 KPHI 191939
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
339 PM EDT Mon Aug 19 2019
DEC005-191948-
/O.EXP.KPHI.SV.W.0362.000000T0000Z-190819T1945Z/
Sussex DE-
339 PM EDT Mon Aug 19 2019
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SUSSEX COUNTY
WILL EXPIRE AT 345 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small hail
and gusty winds are still possible with this thunderstorm.
LAT...LON 3871 7537 3881 7519 3879 7516 3880 7509
3867 7507 3869 7508 3869 7514 3864 7513
3862 7508 3866 7507 3861 7506 3859 7521
3857 7518 3858 7507 3860 7506 3845 7505
3845 7528
TIME...MOT...LOC 1938Z 335DEG 17KT 3839 7495
$$
DavisThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 12:57 PM EDT | Special Weather Statement | PHI | Sussex | 48 min |
| Aug 19, 1:43 PM EDT | Special Weather Statement | PHI | Sussex | 47 min |
| Aug 19, 1:56 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 49 min |
| Aug 19, 2:39 PM EDT | Areal Flood Advisory | PHI | Sussex | 2 hr |
| Aug 19, 3:28 PM EDT | Flash Flood Warning | PHI | Sussex | 3 hr |
| Aug 19, 4:40 PM EDT | Special Weather Statement | PHI | Sussex | 50 min |
| Aug 19, 4:41 PM EDT | Special Weather Statement | PHI | Kent | 49 min |
| Aug 19, 4:46 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 46 min |
| Aug 19, 4:52 PM EDT | Areal Flood Advisory | PHI | Sussex | 68 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 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.