Alert archive / Maryland / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 287, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 2, 2020, 8:47 PM EDT for 5 counties in Maryland. It was in force for 58 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
- Sep 2, 2020, 8:47 PM EDT (00:47 UTC)
- Expired
- Sep 2, 2020, 9:45 PM EDT
- In force
- 58 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Caroline County, MD, Cecil 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 00:48 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 |
|---|---|---|---|
| Sep 2, 6:43 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 0.8 hours before the alert went out and 104 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
- 1723 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 847 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 229 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 8.6
The text
As transmitted.
845
WUUS51 KPHI 030047
SVRPHI
MDC011-015-029-035-041-030145-
/O.NEW.KPHI.SV.W.0287.200903T0047Z-200903T0145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
847 PM EDT Wed Sep 2 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northern Talbot County in eastern Maryland...
Queen Anne's County in northeastern Maryland...
Central Caroline County in eastern Maryland...
Kent County in northeastern Maryland...
Southeastern Cecil County in northeastern Maryland...
* Until 945 PM EDT.
* At 847 PM EDT, severe thunderstorms were located along a line
extending from Bel Air South to Londontowne, moving southeast at 30
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Easton, Centerville, Talbot, Chestertown, Denton, Centreville,
Romancoke, Greensboro, Oakland, Ridgely, Rock Hall, Church Hill,
Cecilton, Millington, Sudlersville, Betterton, Goldsboro, Queen
Anne, Old Town and Grasonville.
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 3903 7631 3904 7631 3898 7628 3900 7617
3901 7621 3917 7628 3932 7618 3946 7601
3941 7577 3876 7580 3882 7631 3883 7619
3886 7626 3886 7621 3897 7625 3891 7624
3894 7627 3884 7637
TIME...MOT...LOC 0047Z 295DEG 24KT 3950 7632 3895 7653
HAIL...<.75IN
WIND...60MPH
$$
Iovino1 follow-up statement
679
WWUS51 KPHI 030114
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
914 PM EDT Wed Sep 2 2020
MDC011-015-029-035-041-030145-
/O.CON.KPHI.SV.W.0287.000000T0000Z-200903T0145Z/
Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-Cecil MD-
914 PM EDT Wed Sep 2 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR NORTHERN TALBOT...QUEEN ANNE'S...CENTRAL CAROLINE...KENT AND
SOUTHEASTERN CECIL COUNTIES...
At 913 PM EDT, severe thunderstorms were located along a line
extending from Newtown to Romancoke, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Easton, Centerville, Talbot, Chestertown, Denton, Centreville,
Romancoke, Greensboro, Oakland, Ridgely, Rock Hall, Church Hill,
Cecilton, Millington, Sudlersville, Betterton, Goldsboro, Queen Anne,
Old Town and Grasonville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3903 7631 3904 7631 3898 7628 3900 7617
3901 7621 3917 7628 3932 7618 3946 7601
3941 7577 3876 7580 3882 7631 3883 7619
3886 7626 3886 7621 3897 7625 3891 7624
3894 7627 3884 7637
TIME...MOT...LOC 0113Z 275DEG 27KT 3932 7617 3888 7634
HAIL...<.75IN
WIND...60MPH
$$
IovinoThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 8:07 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 53 min |
| Sep 2, 10:08 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 67 min |
| Sep 3, 5:47 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 73 min |
| Sep 3, 6:48 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 57 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 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.