Alert archive / Maryland / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 277, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 7, 2023, 7:56 PM EDT for Caroline County, Talbot County, Maryland; Kent County, Sussex County, Delaware. It was in force for 49 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
- Aug 7, 2023, 7:56 PM EDT (23:56 UTC)
- Expired
- Aug 7, 2023, 8:45 PM EDT
- In force
- 49 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 47 km from the middle of the area, began a volume at 23:55 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 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 11.9 hours before the alert went out and 97 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
- 74 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 1004 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
148
WUUS51 KPHI 072356
SVRPHI
DEC001-005-MDC011-041-080045-
/O.NEW.KPHI.SV.W.0277.230807T2356Z-230808T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
756 PM EDT Mon Aug 7 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Sussex County in southern Delaware...
Southwestern Kent County in central Delaware...
Talbot County in eastern Maryland...
Caroline County in eastern Maryland...
* Until 845 PM EDT.
* At 756 PM EDT, severe thunderstorms were located along a line
extending from near Denton to near Oxford, moving southeast at 30
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...
Easton, Georgetown, Seaford, Denton, Laurel, Federalsburg, Milton,
Bridgeville, Greensboro, Ridgely, Trappe, Preston, Oxford,
Ellendale, Smithville, Agner, Choptank, Windyhill, Andrewsville and
Tanyard.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM EDT for central and
southern Delaware...and eastern Maryland.
For your protection move to an interior room on the lowest floor of a
building.
A Tornado Watch remains in effect until 1100 PM EDT for central and
southern Delaware...and eastern Maryland.
&&
LAT...LON 3864 7571 3869 7577 3868 7580 3871 7584
3870 7590 3857 7604 3863 7608 3864 7615
3868 7618 3867 7620 3874 7627 3873 7624
3874 7621 3876 7623 3875 7624 3876 7624
3898 7581 3871 7513 3845 7561 3846 7569
TIME...MOT...LOC 2356Z 303DEG 24KT 3888 7575 3863 7624
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM2 follow-up statements
276
WWUS51 KPHI 080023
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
823 PM EDT Mon Aug 7 2023
DEC001-080032-
/O.CAN.KPHI.SV.W.0277.000000T0000Z-230808T0045Z/
Kent DE-
823 PM EDT Mon Aug 7 2023
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN KENT COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1100 PM EDT for southern
Delaware...and eastern Maryland.
LAT...LON 3864 7571 3869 7577 3868 7580 3871 7584
3870 7590 3857 7604 3863 7608 3864 7615
3868 7618 3867 7620 3869 7622 3873 7611
3876 7601 3881 7589 3884 7582 3873 7556
3866 7540 3862 7531 3845 7561 3846 7569
TIME...MOT...LOC 0022Z 303DEG 24KT 3879 7557 3854 7606
$$
DEC005-MDC011-041-080045-
/O.CON.KPHI.SV.W.0277.000000T0000Z-230808T0045Z/
Sussex DE-Talbot MD-Caroline MD-
823 PM EDT Mon Aug 7 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR SOUTHWESTERN SUSSEX...SOUTHEASTERN TALBOT AND SOUTHERN CAROLINE
COUNTIES...
At 822 PM EDT, severe thunderstorms were located along a line
extending from near Bridgeville to near Cambridge, moving southeast
at 30 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...
Easton, Seaford, Laurel, Federalsburg, Bridgeville, Trappe, Preston,
Oxford, Tanyard, Harmony, Smithville, Agner, Choptank, Sycamore,
Hambleton, Windyhill, Blades and Bethel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM EDT for southern
Delaware...and eastern Maryland.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3864 7571 3869 7577 3868 7580 3871 7584
3870 7590 3857 7604 3863 7608 3864 7615
3868 7618 3867 7620 3869 7622 3873 7611
3876 7601 3881 7589 3884 7582 3873 7556
3866 7540 3862 7531 3845 7561 3846 7569
TIME...MOT...LOC 0022Z 303DEG 24KT 3879 7557 3854 7606
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
RCM984
WWUS51 KPHI 080040
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
840 PM EDT Mon Aug 7 2023
DEC005-MDC011-041-080050-
/O.EXP.KPHI.SV.W.0277.000000T0000Z-230808T0045Z/
Sussex DE-Talbot MD-Caroline MD-
840 PM EDT Mon Aug 7 2023
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SUSSEX...
SOUTHEASTERN TALBOT AND SOUTHERN CAROLINE COUNTIES WILL EXPIRE AT 845
PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
A Tornado Watch remains in effect until 1100 PM EDT for southern
Delaware...and eastern Maryland.
LAT...LON 3864 7571 3869 7577 3868 7580 3871 7584
3870 7590 3857 7604 3863 7608 3864 7615
3868 7618 3867 7620 3869 7622 3873 7611
3876 7601 3881 7589 3884 7582 3873 7556
3866 7540 3862 7531 3845 7561 3846 7569
TIME...MOT...LOC 0040Z 303DEG 24KT 3873 7546 3848 7595
$$
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, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 63 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, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.