Alert archive / Maryland / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 254, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 25, 2020, 5:50 PM EDT for Cecil County, Maryland; New Castle County, Delaware. It was in force for 40 min. 5 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 25, 2020, 5:50 PM EDT (21:50 UTC)
- Expired
- Aug 25, 2020, 6:30 PM EDT
- In force
- 40 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), 97 km from the middle of the area, began a volume at 21:51 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 25, 6:04 PM EDT | TSTM WND DMG | 1 Nnw North East, MD | TREE AND WIRES DOWN AT NORTH EAST RD. AND NAZARENE CAMP RD. TIME ESTIMATED FROM RADAR. |
| Aug 25, 6:05 PM EDT | TSTM WND DMG | North East, MD | MULTIPLE REPORTS OF WIRES AND TREES DOWN AROUND NORTH EAST. TIME ESTIMATED FROM RADAR. |
| Aug 25, 6:05 PM EDT | TSTM WND DMG | North East, MD | SOME SIDING BLOWN OFF A HOUSE IN NORTH EAST. TIME ESTIMATED FROM RADAR. |
| Aug 25, 6:10 PM EDT | TSTM WND GST 66 | 2 E North East, MD | |
| Aug 25, 6:13 PM EDT | TSTM WND DMG | 3 Sw Elkton, MD | 80 FT WALNUT TREE UPROOTED IN ELKMORE. ALSO HAD PEA-SIZED HAIL. 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 |
|---|---|---|---|
| Aug 25, 3:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.8 hours before the alert went out and 142 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
- 573 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 1117 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 176 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted.
756
WUUS51 KPHI 252150
SVRPHI
DEC003-MDC015-252230-
/O.NEW.KPHI.SV.W.0254.200825T2150Z-200825T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
550 PM EDT Tue Aug 25 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southwestern New Castle County in northern Delaware...
Cecil County in northeastern Maryland...
* Until 630 PM EDT.
* At 550 PM EDT, a severe thunderstorm was located over Bay View, or
8 miles northeast of Havre De Grace, moving southeast 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, Elkton, Calvert, North East, Rising Sun, Charlestown,
Warwick, Zion, Mount Pleasant, Bohemias Mills, Woodlawn, West
Nottingham, Octoraro, Brantwood, Pleasant Hill, Cayots, Bay View,
Farmington, Hollywood Beach and Glasgow.
This includes Interstate 95 in Maryland between mile markers 92 and
106.
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.
&&
LAT...LON 3971 7602 3970 7595 3950 7555 3935 7574
3951 7599 3953 7598 3955 7604 3961 7613
3965 7616 3966 7618
TIME...MOT...LOC 2150Z 308DEG 28KT 3963 7598
HAIL...1.00IN
WIND...60MPH
$$
JEO3 follow-up statements
158
WWUS51 KPHI 252207
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
607 PM EDT Tue Aug 25 2020
DEC003-MDC015-252230-
/O.CON.KPHI.SV.W.0254.000000T0000Z-200825T2230Z/
New Castle DE-Cecil MD-
607 PM EDT Tue Aug 25 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHWESTERN NEW CASTLE AND EASTERN CECIL COUNTIES...
At 607 PM EDT, a severe thunderstorm was located over Brantwood, or
near Elkton, moving southeast at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Middletown, Elkton, North East, Charlestown, Warwick, Mount Pleasant,
Bohemias Mills, Brantwood, Cayots, Bay View, Hollywood Beach,
Glasgow, Perryville, Townsend, Chesapeake City and Odessa.
This includes Interstate 95 in Maryland between mile markers 96 and
102.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3966 7595 3950 7555 3935 7574 3951 7599
3953 7598 3955 7604 3957 7607
TIME...MOT...LOC 2207Z 308DEG 28KT 3955 7584
HAIL...1.00IN
WIND...60MPH
$$
JEO713
WWUS51 KPHI 252215 RRA
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
615 PM EDT Tue Aug 25 2020
DEC003-MDC015-252230-
/O.CON.KPHI.SV.W.0254.000000T0000Z-200825T2230Z/
New Castle DE-Cecil MD-
615 PM EDT Tue Aug 25 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHWESTERN NEW CASTLE AND SOUTHEASTERN CECIL COUNTIES...
At 615 PM EDT, a severe thunderstorm was located over Bohemias Mills,
or near Middletown, moving southeast at 30 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Law enforcement. Trees and wires have been reported down in
and around North East.
IMPACT...Minor damage to vehicles is possible. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Middletown, Elkton, North East, Charlestown, Warwick, Mount Pleasant,
Bohemias Mills, Brantwood, Cayots, Hollywood Beach, Townsend,
Chesapeake City and Odessa.
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.
&&
LAT...LON 3963 7594 3950 7555 3935 7574 3951 7599
3953 7598 3955 7603
TIME...MOT...LOC 2215Z 308DEG 28KT 3951 7577
HAIL...1.00IN
WIND...70MPH
$$
JEO286
WWUS51 KPHI 252228
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
628 PM EDT Tue Aug 25 2020
DEC003-MDC015-252238-
/O.EXP.KPHI.SV.W.0254.000000T0000Z-200825T2230Z/
New Castle DE-Cecil MD-
628 PM EDT Tue Aug 25 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NEW CASTLE AND
SOUTHEASTERN CECIL COUNTIES WILL EXPIRE AT 630 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
northern Delaware...and northeastern Maryland.
LAT...LON 3963 7594 3950 7555 3935 7574 3951 7599
3953 7598 3955 7603
TIME...MOT...LOC 2228Z 308DEG 28KT 3945 7567
$$
JEOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 6:31 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 19 min |
| Aug 25, 7:52 PM EDT | Special Weather Statement | PHI | Talbot | 38 min |
| Aug 25, 5:35 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 40 min |
| Aug 25, 7:15 PM EDT | Special Weather Statement | PHI | Kent | 45 min |
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.