Alert archive / Maryland / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 301, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 15, 2020, 8:57 PM EST for Caroline County, Talbot County, Maryland; Kent County, Sussex County, Delaware. It was in force for 63 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
- Nov 15, 2020, 8:57 PM EST (01:57 UTC)
- Expired
- Nov 15, 2020, 10:00 PM EST
- In force
- 63 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), 42 km from the middle of the area, began a volume at 01:58 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 |
|---|---|---|---|
| Nov 15, 5:35 PM EST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 2.0 hours before the alert went out and 95 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 883 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- 517 m²/s²
- 0-3 km storm-relative helicity
- 602 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
080
WUUS51 KPHI 160157
SVRPHI
DEC001-005-MDC011-041-160300-
/O.NEW.KPHI.SV.W.0301.201116T0157Z-201116T0300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
857 PM EST Sun Nov 15 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Sussex County in southern Delaware...
Southern Kent County in central Delaware...
Talbot County in eastern Maryland...
Caroline County in eastern Maryland...
* Until 1000 PM EST.
* At 856 PM EST, severe thunderstorms were located along a line
extending from near Fortesque to near Denton to Greenwell State
Park, moving southeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Dover, Easton, Georgetown, Milford, Seaford, Denton, Millsboro,
Laurel, Harrington, Camden, Lewes, Federalsburg, Milton,
Selbyville, Bridgeville, Greensboro, Ridgely, Delmar, Trappe and
Dagsboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.
&&
LAT...LON 3846 7569 3864 7571 3869 7577 3868 7580
3871 7584 3870 7590 3857 7604 3863 7608
3864 7615 3868 7618 3868 7621 3871 7621
3874 7628 3876 7624 3873 7624 3874 7621
3876 7623 3922 7533 3884 7488 3845 7499
TIME...MOT...LOC 0156Z 339DEG 29KT 3921 7525 3892 7574 3838 7656
HAIL...<.75IN
WIND...60MPH
$$
NC2 follow-up statements
022
WWUS51 KPHI 160239
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
939 PM EST Sun Nov 15 2020
DEC001-MDC011-041-160248-
/O.CAN.KPHI.SV.W.0301.000000T0000Z-201116T0300Z/
Kent DE-Talbot MD-Caroline MD-
939 PM EST Sun Nov 15 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN KENT...TALBOT AND
CAROLINE COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled. Gusty W-NW winds
will be possible though for the next hour or so.
A Severe Thunderstorm Watch remains in effect until 1100 PM EST for
central and southern Delaware.
LAT...LON 3846 7569 3883 7572 3884 7555 3890 7549
3892 7541 3896 7539 3895 7532 3898 7531
3901 7533 3906 7540 3915 7541 3919 7540
3922 7533 3884 7488 3845 7499
TIME...MOT...LOC 0238Z 339DEG 29KT 3890 7510 3861 7559 3807 7641
$$
DEC005-160300-
/O.CON.KPHI.SV.W.0301.000000T0000Z-201116T0300Z/
Sussex DE-
939 PM EST Sun Nov 15 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EST
FOR SUSSEX COUNTY...
At 938 PM EST, severe thunderstorms were located along a line
extending from 7 miles north of Cape Henlopen State Park to near
Seaford to near Saint Inigoes Creek, moving south at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Georgetown, Milford, Seaford, Millsboro, Laurel, Lewes, Milton,
Selbyville, Bridgeville, Delmar, Dagsboro, Millville, Ellendale,
Bowers, Henlopen Acres, Gumboro, Cape Henlopen State Park, Sycamore,
Long Neck and Ocean View.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.
&&
LAT...LON 3846 7569 3883 7572 3884 7555 3890 7549
3892 7541 3896 7539 3895 7532 3898 7531
3901 7533 3906 7540 3915 7541 3919 7540
3922 7533 3884 7488 3845 7499
TIME...MOT...LOC 0238Z 339DEG 29KT 3890 7510 3861 7559 3807 7641
HAIL...<.75IN
WIND...60MPH
$$
NC528
WWUS51 KPHI 160255
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
955 PM EST Sun Nov 15 2020
DEC005-160304-
/O.EXP.KPHI.SV.W.0301.000000T0000Z-201116T0300Z/
Sussex DE-
955 PM EST Sun Nov 15 2020
...THE SEVERE THUNDERSTORM WARNING FOR SUSSEX COUNTY WILL EXPIRE AT
1000 PM EST...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 1100 PM EST for
central and southern Delaware.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 3846 7569 3883 7572 3884 7555 3890 7549
3892 7541 3896 7539 3895 7532 3898 7531
3901 7533 3906 7540 3915 7541 3919 7540
3922 7533 3884 7488 3845 7499
TIME...MOT...LOC 0254Z 339DEG 29KT 3890 7510 3861 7559 3807 7641
$$
NCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 15, 7:40 PM EST | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 80 min |
| Nov 15, 7:50 PM EST | Severe Thunderstorm Warning | PHI | New Castle | 70 min |
| Nov 15, 11:02 PM EST | Coastal Flood Statement | PHI | Sussex | 3 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.