Alert archive / Maryland / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 270, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2023, 5:57 PM EDT for 4 counties in Maryland; Kent County, New Castle County, Delaware. It was in force for 63 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 7, 2023, 5:57 PM EDT (21:57 UTC)
- Expired
- Aug 7, 2023, 7:00 PM EDT
- In force
- 63 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Kent County, DE, New Castle County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 69 km from the middle of the area, began a volume at 22:00 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 7, 6:33 PM EDT | TSTM WND DMG | Chestertown, MD | Trees down in Chestertown, MD. Time estimated from radar. |
| Aug 7, 6:40 PM EDT | TSTM WND DMG | Millington, MD | Trees down in Millington. Time estimated from radar. |
| Aug 7, 6:54 PM EDT | TSTM WND DMG | 2 Se Grasonville, MD | Wires down Crows Nest Road. 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 7, 3:13 PM EDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.0 hours before the alert went out and 102 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
- 285 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 738 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
465
WUUS51 KPHI 072157
SVRPHI
DEC001-003-MDC011-029-035-041-072300-
/O.NEW.KPHI.SV.W.0270.230807T2157Z-230807T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
557 PM EDT Mon Aug 7 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
South central New Castle County in northern Delaware...
Northwestern Kent County in central Delaware...
Talbot County in eastern Maryland...
Queen Anne's County in northeastern Maryland...
Northern Caroline County in eastern Maryland...
Kent County in northeastern Maryland...
* Until 700 PM EDT.
* At 557 PM EDT, severe thunderstorms were located along a line
extending from near Dundalk to Nationals Park, moving east at 65
mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Dover, Easton, Centerville, Talbot, Smyrna, Chestertown,
Centreville, Romancoke, Clayton, Greensboro, Oakland, Ridgely,
Cheswold, Rock Hall, St. Michaels, Church Hill, Oxford, Millington,
Sudlersville and Goldsboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM EDT for central and
northern Delaware...and eastern and northeastern Maryland.
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.
A Tornado Watch remains in effect until 1100 PM EDT for central and
northern Delaware...and eastern and northeastern Maryland.
&&
LAT...LON 3876 7635 3886 7626 3879 7619 3883 7619
3897 7625 3884 7637 3895 7636 3904 7631
3900 7617 3915 7628 3928 7620 3933 7539
3866 7615 3878 7629 3867 7634 3877 7638
TIME...MOT...LOC 2157Z 259DEG 57KT 3924 7654 3886 7701
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM1 follow-up statement
144
WWUS51 KPHI 072229
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
629 PM EDT Mon Aug 7 2023
DEC001-003-MDC011-029-035-041-072300-
/O.CON.KPHI.SV.W.0270.000000T0000Z-230807T2300Z/
New Castle DE-Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
629 PM EDT Mon Aug 7 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SOUTH CENTRAL NEW CASTLE...NORTHWESTERN KENT...TALBOT...QUEEN
ANNE'S...NORTHERN CAROLINE AND KENT COUNTIES...
At 629 PM EDT, severe thunderstorms were located along a line
extending from near Kennedyville to near Severn River, moving east at
65 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Dover, Easton, Centerville, Talbot, Smyrna, Chestertown, Centreville,
Romancoke, Clayton, Greensboro, Oakland, Ridgely, Cheswold, Rock
Hall, St. Michaels, Church Hill, Oxford, Millington, Sudlersville and
Goldsboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM EDT for central and
northern Delaware...and eastern and northeastern Maryland.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3876 7635 3886 7626 3879 7619 3883 7619
3897 7625 3884 7637 3895 7636 3904 7631
3900 7617 3915 7628 3928 7620 3933 7539
3866 7615 3878 7629 3867 7634 3877 7638
TIME...MOT...LOC 2229Z 259DEG 57KT 3933 7595 3895 7642
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 5:37 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 53 min |
| Aug 7, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 69 min |
| Aug 7, 6:52 PM EDT | Areal Flood Advisory | PHI | Caroline, Kent, Queen Anne's, Talbot | 95 min |
| Aug 7, 6:58 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 62 min |
| Aug 7, 7:56 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 49 min |
| Aug 7, 5:57 PM EDT | Areal Flood Advisory | PHI | New Castle | 79 min |
| Aug 7, 6:29 PM EDT | Areal Flood Advisory | PHI | New Castle | 63 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2023Severe Thunderstorm Warnings in Delaware, 2023Every severe thunderstorm warning in 2023
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.