Alert archive / Maryland / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 178, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 23, 2020, 11:00 PM EDT for New Castle County, Delaware; Cecil County, Kent County, Maryland. It was in force for 45 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
- Jul 23, 2020, 11:00 PM EDT (03:00 UTC)
- Expired
- Jul 23, 2020, 11:45 PM EDT
- In force
- 45 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Cecil County, MD, Kent County, MD
The radar
The Dover AFB radar (KDOX), 84 km from the middle of the area, began a volume at 03:02 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 |
|---|---|---|---|
| Jul 23, 11:07 PM EDT | TSTM WND DMG | 3 Wsw Earleville, MD | DOWNED WIRES NEAR GROVE NECK ROAD IN EARLEVILLE. TIME ESTIMATED FROM RADAR. |
| Jul 23, 11:41 PM EDT | TSTM WND DMG | Woodshade, DE | SEVERAL REPORTS OF DOWNED TREE LIMBS AND WIRES BETWEEN GLASGOW AND WOODSHADE. 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
Washington/Dulle, VA (KIAD), launched 00:00Z, 3.0 hours before the alert went out and 134 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
- 229 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 2029 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
670
WUUS51 KPHI 240300
SVRPHI
DEC003-MDC015-029-240345-
/O.NEW.KPHI.SV.W.0178.200724T0300Z-200724T0345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1100 PM EDT Thu Jul 23 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
West central New Castle County in northern Delaware...
North central Kent County in northeastern Maryland...
Southeastern Cecil County in northeastern Maryland...
* Until 1145 PM EDT.
* At 1059 PM EDT, a severe thunderstorm was located over Betterton,
or 8 miles southeast of Aberdeen Proving Ground, moving northeast
at 20 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...
Newark, Middletown, Elkton, North East, Cecilton, Betterton,
Warwick, Saint Georges, Barksdale, Mount Pleasant, Glasgow, Bear,
Bohemias Mills, Brantwood, Cayots, Hollywood Beach, Kennedyville,
Pike Creek, Chesapeake City and Brookside.
This includes the following highways...
Interstate 95 in Delaware between mile markers 0 and 7.
Interstate 95 in Maryland between mile markers 105 and 109.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
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 3944 7600
3946 7601 3952 7598 3954 7600 3965 7587
3972 7567 3951 7560 3927 7605 3933 7614
3935 7613
TIME...MOT...LOC 0259Z 228DEG 16KT 3936 7604
HAIL...0.75IN
WIND...60MPH
$$
Staarmann2 follow-up statements
096
WWUS51 KPHI 240306
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1106 PM EDT Thu Jul 23 2020
DEC003-MDC015-029-240345-
/O.CON.KPHI.SV.W.0178.000000T0000Z-200724T0345Z/
New Castle DE-Kent MD-Cecil MD-
1106 PM EDT Thu Jul 23 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT
FOR WEST CENTRAL NEW CASTLE...NORTH CENTRAL KENT AND SOUTHEASTERN
CECIL COUNTIES...
At 1106 PM EDT, severe thunderstorms were located along a line
extending from near Elkton to near Hollywood Beach to Betterton,
moving northeast at 25 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Newark, Middletown, Elkton, North East, Cecilton, Betterton, Saint
Georges, Barksdale, Mount Pleasant, Glasgow, Bear, Bohemias Mills,
Brantwood, Cayots, Hollywood Beach, Pike Creek, Chesapeake City and
Brookside.
This includes the following highways...
Interstate 95 in Delaware between mile markers 0 and 7.
Interstate 95 in Maryland between mile markers 105 and 109.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3937 7611 3937 7606 3942 7600 3944 7600
3946 7601 3952 7598 3954 7600 3965 7587
3972 7567 3951 7560 3931 7602
TIME...MOT...LOC 0306Z 221DEG 20KT 3962 7587 3952 7595 3935 7605
HAIL...0.75IN
WIND...60MPH
$$
Staarmann302
WWUS51 KPHI 240321
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1121 PM EDT Thu Jul 23 2020
MDC029-240331-
/O.CAN.KPHI.SV.W.0178.000000T0000Z-200724T0345Z/
Kent MD-
1121 PM EDT Thu Jul 23 2020
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL KENT COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 3950 7561 3946 7577 3948 7592 3963 7589
3965 7587 3972 7567 3951 7560
TIME...MOT...LOC 0321Z 231DEG 17KT 3961 7579 3949 7589
$$
DEC003-MDC015-240345-
/O.CON.KPHI.SV.W.0178.000000T0000Z-200724T0345Z/
New Castle DE-Cecil MD-
1121 PM EDT Thu Jul 23 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT
FOR WEST CENTRAL NEW CASTLE AND EAST CENTRAL CECIL COUNTIES...
At 1121 PM EDT, severe thunderstorms were located along a line
extending from Elkton to Hollywood Beach, moving northeast at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Newark, Middletown, Elkton, Saint Georges, Barksdale, Mount Pleasant,
Glasgow, Bear, Bohemias Mills, Brantwood, Cayots, Hollywood Beach,
Pike Creek, Chesapeake City and Brookside.
This includes the following highways...
Interstate 95 in Delaware between mile markers 0 and 7.
Interstate 95 in Maryland between mile markers 105 and 109.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3950 7561 3946 7577 3948 7592 3963 7589
3965 7587 3972 7567 3951 7560
TIME...MOT...LOC 0321Z 231DEG 17KT 3961 7579 3949 7589
HAIL...0.75IN
WIND...60MPH
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 10:26 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 49 min |
| Jul 23, 11:10 PM EDT | Areal Flood Advisory | PHI | New Castle | 2 hr |
| Jul 23, 11:16 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 44 min |
| Jul 24, 12:24 AM EDT | Flash Flood Warning | PHI | New Castle | 114 min |
| Jul 24, 12:37 AM EDT | River Flood Warning | PHI | New Castle | 102 min |
| Jul 24, 4:35 PM EDT | Special Weather Statement | PHI | New Castle | 25 min |
| Jul 24, 5:34 PM EDT | Special Weather Statement | PHI | Sussex | 26 min |
| Jul 23, 10:18 PM EDT | Special Weather Statement | PHI | Cecil | 27 min |
| Jul 23, 10:44 PM EDT | Areal Flood Advisory | PHI | Cecil | 2 hr |
Nearby
Severe Thunderstorm Warnings in Maryland, 2020Severe Thunderstorm Warnings in Delaware, 2020Every severe thunderstorm warning in 2020
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.