Alert archive / Maryland / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 245, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2019, 9:44 PM EDT for New Castle County, Delaware; Cecil County, Kent County, Maryland. It was in force for 46 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
- Jul 21, 2019, 9:44 PM EDT (01:44 UTC)
- Expired
- Jul 21, 2019, 10:30 PM EDT
- In force
- 46 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, Kent County, MD
The radar
The Dover AFB radar (KDOX), 76 km from the middle of the area, began a volume at 01:46 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.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 1.7 hours before the alert went out and 150 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
- 157 J/kg
- Mixed-layer CIN
- -308 J/kg
- Mixed-layer LCL
- 1994 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -73 m²/s²
- 0-3 km storm-relative helicity
- -77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
913
WUUS51 KPHI 220144
SVRPHI
DEC003-MDC015-029-220230-
/O.NEW.KPHI.SV.W.0245.190722T0144Z-190722T0230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
944 PM EDT Sun Jul 21 2019
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern New Castle County in northern Delaware...
Northeastern Kent County in northeastern Maryland...
Southeastern Cecil County in northeastern Maryland...
* Until 1030 PM EDT.
* At 944 PM EDT, a severe thunderstorm was located near Cecilton, or
10 miles east of Aberdeen Proving Ground, moving east at 30 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, Delaware City, Cecilton, Betterton, Warwick, Saint
Georges, Sassafras, Mount Pleasant, Bohemias Mills, Port Penn,
Brantwood, Cayots, Hollywood Beach, Townsend, Chesapeake City,
Galena, Odessa and Chambersville.
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 3937 7611 3937 7606 3942 7600 3950 7599
3962 7561 3959 7560 3959 7557 3958 7558
3951 7556 3949 7559 3946 7559 3941 7554
3936 7552 3931 7604 3935 7613
TIME...MOT...LOC 0144Z 251DEG 24KT 3942 7595
HAIL...1.00IN
WIND...60MPH
$$
Staarmann1 follow-up statement
023
WWUS51 KPHI 220203
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1003 PM EDT Sun Jul 21 2019
MDC029-220213-
/O.CAN.KPHI.SV.W.0245.000000T0000Z-190722T0230Z/
Kent MD-
1003 PM EDT Sun Jul 21 2019
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN KENT COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3947 7597 3962 7562 3959 7560 3959 7557
3958 7558 3952 7557 3951 7556 3950 7559
3946 7559 3938 7553 3938 7582 3937 7583
3937 7595 3942 7600
TIME...MOT...LOC 0203Z 240DEG 14KT 3943 7588
$$
DEC003-MDC015-220230-
/O.CON.KPHI.SV.W.0245.000000T0000Z-190722T0230Z/
New Castle DE-Cecil MD-
1003 PM EDT Sun Jul 21 2019
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT
FOR SOUTHWESTERN NEW CASTLE AND SOUTHEASTERN CECIL COUNTIES...
At 1003 PM EDT, a severe thunderstorm was located over Cecilton, or 8
miles west of Middletown, moving northeast at 15 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, Delaware City, Cecilton, Warwick, Saint Georges, Port
Penn, Mount Pleasant, Cayots, Bohemias Mills, Townsend, Chesapeake
City and Odessa.
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 3947 7597 3962 7562 3959 7560 3959 7557
3958 7558 3952 7557 3951 7556 3950 7559
3946 7559 3938 7553 3938 7582 3937 7583
3937 7595 3942 7600
TIME...MOT...LOC 0203Z 240DEG 14KT 3943 7588
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 |
|---|---|---|---|---|
| Jul 21, 9:30 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 45 min |
| Jul 21, 10:13 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 47 min |
| Jul 21, 10:54 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 25 min |
| Jul 22, 3:47 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 58 min |
| Jul 22, 4:16 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 59 min |
| Jul 22, 4:40 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 114 min |
| Jul 22, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 61 min |
| Jul 21, 9:55 PM EDT | Areal Flood Advisory | PHI | Cecil | 87 min |
| Jul 22, 4:11 PM EDT | Areal Flood Advisory | PHI | Cecil | 4 hr |
| Jul 22, 4:21 PM EDT | Areal Flood Advisory | PHI | Cecil, Kent | 2 hr |
Nearby
Severe Thunderstorm Warnings in Maryland, 2019Severe 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.