Alert archive / Maryland / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 289, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 3, 2020, 5:47 PM EDT for 4 counties in Maryland. It was in force for 73 min. 2 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
- Sep 3, 2020, 5:47 PM EDT (21:47 UTC)
- Expired
- Sep 3, 2020, 7:00 PM EDT
- In force
- 73 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 70.0 mph
Counties Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 67 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 |
|---|---|---|---|
| Sep 3, 6:30 PM EDT | TSTM WND GST 64 | 4 Nnw Copperville, MD | CORRECTS TIME OF PREVIOUS TSTM WND GST REPORT FROM 4 NNW COPPERVILLE. MEASURED BY A TEMPEST WEATHER STATION ON BENNET POINT RD. |
| Sep 3, 6:30 PM EDT | TSTM WND GST 64 | 4 Nnw Copperville, MD | CORRECTS TIME OF PREVIOUS TSTM WND GST REPORT FROM 4 NNW COPPERVILLE. MEASURED BY A TEMPEST WEATHER STATION ON BENNET POINT RD. |
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 |
|---|---|---|---|
| Sep 3, 3:42 PM EDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.8 hours before the alert went out and 103 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
- 12 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 1011 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
219
WUUS51 KPHI 032147
SVRPHI
MDC011-029-035-041-032300-
/O.NEW.KPHI.SV.W.0289.200903T2147Z-200903T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
547 PM EDT Thu Sep 3 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Talbot County in eastern Maryland...
Queen Anne's County in northeastern Maryland...
Northwestern Caroline County in eastern Maryland...
Southwestern Kent County in northeastern Maryland...
* Until 700 PM EDT.
* At 545 PM EDT, severe thunderstorms were located along a line
extending from near Parole to near Bowie to Landover, moving east
at 35 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
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...
Easton, Centerville, Talbot, Centreville, Oakland, Ridgely, St.
Michaels, Queen Anne, Tanyard, Grasonville, Starr, Stevensville,
Skipton, Copperville, Jumptown, Chester, Matthews, Wye Mills,
Cordova, and Carville.
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.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure. A Tornado
Watch remains in effect until 1000 PM EDT for eastern and
northeastern Maryland.
&&
LAT...LON 3894 7636 3904 7631 3900 7617 3911 7624
3912 7583 3911 7582 3873 7597 3871 7623
3876 7623 3868 7634 3886 7626 3886 7625
3879 7620 3879 7619 3894 7621 3896 7631
3884 7637 3885 7638
TIME...MOT...LOC 2145Z 278DEG 30KT 3903 7656 3894 7670 3892 7688
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH
$$
Staarmann2 follow-up statements
690
WWUS51 KPHI 032222
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
622 PM EDT Thu Sep 3 2020
MDC029-032232-
/O.CAN.KPHI.SV.W.0289.000000T0000Z-200903T2300Z/
Kent MD-
622 PM EDT Thu Sep 3 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN KENT COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1000 PM EDT for eastern and
northeastern Maryland.
LAT...LON 3904 7631 3898 7628 3897 7622 3900 7617
3905 7620 3905 7585 3873 7597 3871 7623
3876 7623 3869 7634 3873 7630 3884 7626
3879 7622 3879 7619 3893 7620 3896 7624
3895 7625 3896 7631 3884 7637 3885 7638
TIME...MOT...LOC 2222Z 279DEG 31KT 3899 7617 3888 7629 3887 7655
$$
MDC011-035-041-032300-
/O.CON.KPHI.SV.W.0289.000000T0000Z-200903T2300Z/
Talbot MD-Queen Anne's MD-Caroline MD-
622 PM EDT Thu Sep 3 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR TALBOT...SOUTHERN QUEEN ANNE'S AND NORTHWESTERN CAROLINE
COUNTIES...
At 622 PM EDT, severe thunderstorms were located along a line
extending from near Grasonville to near Romancoke to Rhode River,
moving east at 35 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
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...
Easton, Centerville, Centreville, Oakland, Ridgely, St. Michaels,
Queen Anne, Tanyard, Grasonville, Starr, Stevensville, Skipton,
Copperville, Jumptown, Chester, Matthews, Wye Mills, Cordova,
Carville and Hope.
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.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure. A Tornado
Watch remains in effect until 1000 PM EDT for eastern and
northeastern Maryland.
Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3904 7631 3898 7628 3897 7622 3900 7617
3905 7620 3905 7585 3873 7597 3871 7623
3876 7623 3869 7634 3873 7630 3884 7626
3879 7622 3879 7619 3893 7620 3896 7624
3895 7625 3896 7631 3884 7637 3885 7638
TIME...MOT...LOC 2222Z 279DEG 31KT 3899 7617 3888 7629 3887 7655
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH
$$
Staarmann227
WWUS51 KPHI 032250
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
650 PM EDT Thu Sep 3 2020
MDC011-035-041-032300-
/O.CON.KPHI.SV.W.0289.000000T0000Z-200903T2300Z/
Talbot MD-Queen Anne's MD-Caroline MD-
650 PM EDT Thu Sep 3 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR TALBOT...SOUTH CENTRAL QUEEN ANNE'S AND WEST CENTRAL CAROLINE
COUNTIES...
At 649 PM EDT, severe thunderstorms were located along a line
extending from Ridgely to Cordova to Talbot, moving east at 35 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Easton, Oakland, Ridgely, St. Michaels, Queen Anne, Tanyard, Skipton,
Copperville, Jumptown, Matthews, Wye Mills, Cordova, Starr and
Hillsboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure. A Tornado
Watch remains in effect until 1000 PM EDT for eastern and
northeastern Maryland.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3890 7620 3890 7619 3902 7591 3902 7586
3873 7597 3871 7623 3876 7623 3869 7634
3873 7630 3884 7626 3879 7622 3879 7619
TIME...MOT...LOC 2249Z 278DEG 30KT 3896 7589 3885 7601 3884 7627
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH
$$
StaarmannThe 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, 8:47 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 58 min |
| Sep 2, 10:08 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 67 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.