Alert archive / Delaware / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 151, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 29, 2019, 2:47 PM EDT for New Castle County, Delaware; Cecil County, Maryland. It was in force for 28 min. 2 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 29, 2019, 2:47 PM EDT (18:47 UTC)
- Expired
- Jun 29, 2019, 3:15 PM EDT
- In force
- 28 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Cecil County, MD
The radar
The Dover AFB radar (KDOX), 81 km from the middle of the area, began a volume at 18:48 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 29, 2:51 PM EDT | TSTM WND DMG | 1 E Cayots, MD | DOWNED TREES RESULTED IN PROPERTY DAMAGE ON WOODSTOCK FARM LANE. TIME ESTIMATED FROM RADAR. |
| Jun 29, 2:55 PM EDT | TSTM WND DMG | 2 Ene Cayots, MD | SEVERAL DOWNED TREES AND LIMBS ALONG STATE HIGHWAY 310 SOUTH OF CHESAPEAKE CITY. TIME ESTIMATED FROM RADAR. |
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 29, 12:08 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.8 hours before the alert went out and 147 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
- 927 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 1390 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
852
WUUS51 KPHI 291847
SVRPHI
DEC003-MDC015-291915-
/O.NEW.KPHI.SV.W.0151.190629T1847Z-190629T1915Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
247 PM EDT Sat Jun 29 2019
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
West central New Castle County in northern Delaware...
East central Cecil County in northeastern Maryland...
* Until 315 PM EDT.
* At 246 PM EDT, a severe thunderstorm was located over Cayots, or
near Elkton, and moving east at 5 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...
Middletown, Warwick, Mount Pleasant, Cayots, Hollywood Beach,
Bohemias Mills and Chesapeake City.
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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3947 7592 3954 7590 3956 7569 3940 7575
TIME...MOT...LOC 1846Z 283DEG 4KT 3950 7585
HAIL...1.00IN
WIND...60MPH
$$
Staarmann1 follow-up statement
009
WWUS51 KPHI 291859
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
259 PM EDT Sat Jun 29 2019
DEC003-MDC015-291915-
/O.CON.KPHI.SV.W.0151.000000T0000Z-190629T1915Z/
New Castle DE-Cecil MD-
259 PM EDT Sat Jun 29 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR WEST CENTRAL NEW CASTLE AND SOUTHEASTERN CECIL COUNTIES...
At 259 PM EDT, a severe thunderstorm was located near Bohemias Mills,
or near Middletown, moving east at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Middletown, Bohemias Mills, Mount Pleasant and Chesapeake City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3954 7582 3956 7569 3944 7573 3942 7575
3949 7584
TIME...MOT...LOC 1859Z 274DEG 11KT 3951 7579
HAIL...1.00IN
WIND...60MPH
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 2:33 PM EDT | Special Weather Statement | PHI | Kent | 27 min |
| Jun 29, 2:57 PM EDT | Special Weather Statement | PHI | Kent | 33 min |
| Jun 29, 3:06 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 39 min |
| Jun 29, 3:13 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 8 min |
| Jun 29, 3:24 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 36 min |
| Jun 29, 3:39 PM EDT | Special Weather Statement | PHI | New Castle | 51 min |
| Jun 29, 3:59 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 46 min |
| Jun 29, 4:00 PM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Jun 29, 4:24 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 36 min |
| Jun 29, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 52 min |
| Jun 29, 4:52 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 38 min |
| Jun 29, 4:55 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 50 min |
| Jun 29, 5:26 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 79 min |
| Jun 29, 5:38 PM EDT | Areal Flood Advisory | PHI | Kent | 109 min |
| Jun 29, 6:38 PM EDT | Special Weather Statement | PHI | Sussex | 52 min |
| Jun 29, 1:19 PM EDT | Special Weather Statement | PHI | Cecil | 26 min |
| Jun 29, 1:26 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 49 min |
| Jun 29, 2:08 PM EDT | Areal Flood Advisory | PHI | Cecil | 3 hr |
| Jun 29, 2:12 PM EDT | Special Weather Statement | PHI | Cecil | 33 min |
| Jun 29, 2:44 PM EDT | Special Weather Statement | PHI | Cecil | 31 min |
| Jun 29, 3:27 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 53 min |
| Jun 29, 4:14 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 46 min |
| Jun 29, 4:58 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's, Talbot | 47 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.