Alert archive / Maryland / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 144, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2020, 7:41 PM EDT for Kent County, New Castle County, Sussex County, Delaware; 4 counties in Maryland. It was in force for 64 min. 10 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
- Jul 6, 2020, 7:41 PM EDT (23:41 UTC)
- Expired
- Jul 6, 2020, 8:45 PM EDT
- In force
- 64 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 60 km from the middle of the area, began a volume at 23:43 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 |
|---|---|---|---|
| Jul 6, 7:44 PM EDT | TSTM WND DMG | 2 Wnw Goldsboro, MD | MD 313 CLOSED IN BOTH DIRECTIONS FROM HOLLINGSWORTH CIRCLE TO JONES RD DUE TO STORM DEBRIS. TIME ESTIMATED FROM RADAR. |
| Jul 6, 7:50 PM EDT | TSTM WND DMG | 2 Ne Skipton, MD | SEVERAL TREES DOWN DUE TO STRAIGHT LINE WINDS ON SPARKIE LANE IN QUEEN ANNE. TIME ESTIMATED FROM RADAR. |
| Jul 6, 7:54 PM EDT | TSTM WND GST 60 | Goldsboro, MD | VIDEO ON SOCIAL MEDIA OF WINDS WHICH APPEARED TO BE AT LEAST 60 MPH. TIME ESTIMATED FROM RADAR. |
| Jul 6, 8:01 PM EDT | TSTM WND DMG | 2 Ene Copperville, MD | UNIONVILLE ROAD CLOSED AT TODDS CORNER ROAD FROM WIND-BLOWN DEBRIS. TIME ESTIMATED FROM RADAR. |
| Jul 6, 8:05 PM EDT | TSTM WND DMG | 3 Nne Easton, MD | STATE HIGHWAY 309 CLOSED AT BLACK DOG ALLEY FROM WIND-BLOWN DEBRIS. TIME ESTIMATED FROM RADAR. |
| Jul 6, 8:15 PM EDT | TSTM WND DMG | 4 Ene Royal Oak, MD | TREE INTO BUILDING ON TRAVELERS REST CIRCLE. TIME ESTIMATED FROM RADAR. |
| Jul 6, 8:17 PM EDT | TSTM WND DMG | 2 Wnw Easton, MD | TREE INTO A STRUCTURE ON ST. MICHAELS RD. TIME ESTIMATED FROM RADAR. |
| Jul 6, 8:18 PM EDT | TSTM WND DMG | 5 Sse Sandtown, DE | DOWNED POWER LINES NEAR PARK BROWN ROAD NEAR SANDTOWN. TIME ESTIMATED FROM RADAR. |
| Jul 6, 8:20 PM EDT | TSTM WND DMG | 6 Wnw Harrington, DE | TREES AND WIRES DOWN TO THE NORTH AND WEST OF HARRINGTON. TIME ESTIMATED FROM RADAR. |
| Jul 6, 8:28 PM EDT | TSTM WND DMG | 1 Nnw Trappe, MD | STATE HIGHWAY 565 NORTHBOUND PAST BACKTOWN ROAD IN TRAPPE WAS CLOSED FROM WIND-BLOWN DEBRIS. 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 |
|---|---|---|---|
| Jul 6, 1:38 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.7 hours before the alert went out and 111 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
- 1250 J/kg
- Mixed-layer CIN
- -133 J/kg
- Mixed-layer LCL
- 1150 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
900
WUUS51 KPHI 062341
SVRPHI
DEC001-003-005-MDC011-029-035-041-070045-
/O.NEW.KPHI.SV.W.0144.200706T2341Z-200707T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
741 PM EDT Mon Jul 6 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Sussex County in southern Delaware...
Southwestern New Castle County in northern Delaware...
Kent County in central Delaware...
Talbot County in eastern Maryland...
Queen Anne's County in northeastern Maryland...
Caroline County in eastern Maryland...
Central Kent County in northeastern Maryland...
* Until 845 PM EDT.
* At 739 PM EDT, severe thunderstorms were located along a line
extending from Smyrna to Hope to near Chesapeake Beach, 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...
Dover, Easton, Centerville, Talbot, Smyrna, Milford, Chestertown,
Denton, Centreville, Harrington, Camden, Clayton, Federalsburg,
Greensboro, Oakland, Ridgely, Cheswold, Trappe, St. Michaels and
Church Hill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
&&
LAT...LON 3896 7631 3885 7638 3904 7631 3898 7628
3899 7625 3900 7617 3910 7624 3918 7614
3947 7556 3903 7521 3868 7573 3870 7590
3857 7602 3868 7621 3876 7622 3871 7628
3878 7629 3876 7632 3867 7634
TIME...MOT...LOC 2339Z 317DEG 25KT 3930 7559 3903 7598 3873 7645
HAIL...0.75IN
WIND...60MPH
$$
Robertson2 follow-up statements
593
WWUS51 KPHI 070009
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
809 PM EDT Mon Jul 6 2020
DEC003-MDC029-070018-
/O.CAN.KPHI.SV.W.0144.000000T0000Z-200707T0045Z/
New Castle DE-Kent MD-
809 PM EDT Mon Jul 6 2020
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NEW CASTLE AND
CENTRAL KENT COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened and moved out of
the warned area. Therefore, the warning has been cancelled. However
gusty winds and heavy rain are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
central and southern Delaware...and eastern and northeastern
Maryland.
LAT...LON 3891 7635 3886 7634 3883 7629 3890 7629
3879 7620 3894 7621 3893 7631 3894 7630
3933 7545 3904 7521 3869 7572 3870 7590
3857 7602 3868 7621 3876 7622 3871 7628
3878 7629 3876 7632 3869 7634 3870 7634
TIME...MOT...LOC 0008Z 315DEG 26KT 3916 7540 3889 7579 3859 7626
$$
DEC001-005-MDC011-035-041-070045-
/O.CON.KPHI.SV.W.0144.000000T0000Z-200707T0045Z/
Sussex DE-Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-
809 PM EDT Mon Jul 6 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR NORTHWESTERN SUSSEX...KENT...TALBOT...CENTRAL QUEEN ANNE'S AND
CAROLINE COUNTIES...
At 808 PM EDT, severe thunderstorms were located along a line
extending from near Dover Base Housing to Denton to 7 miles west of
University Of Maryland Center For Environmental Studies, 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...
Dover, Easton, Centerville, Talbot, Milford, Denton, Centreville,
Harrington, Camden, Greensboro, Oakland, Ridgely, Cheswold, Trappe,
St. Michaels, Preston, Oxford, Bowers, Goldsboro and Queen Anne.
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 3891 7635 3886 7634 3883 7629 3890 7629
3879 7620 3894 7621 3893 7631 3894 7630
3933 7545 3904 7521 3869 7572 3870 7590
3857 7602 3868 7621 3876 7622 3871 7628
3878 7629 3876 7632 3869 7634 3870 7634
TIME...MOT...LOC 0008Z 315DEG 26KT 3916 7540 3889 7579 3859 7626
HAIL...<.75IN
WIND...60MPH
$$
Robertson204
WWUS51 KPHI 070035
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
835 PM EDT Mon Jul 6 2020
MDC035-070044-
/O.CAN.KPHI.SV.W.0144.000000T0000Z-200707T0045Z/
Queen Anne's MD-
835 PM EDT Mon Jul 6 2020
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL QUEEN ANNE'S COUNTY IS
CANCELLED...
The storms which prompted the warning have weakened and moved out of
the warned area. Therefore, the warning has been cancelled. However
gusty winds and heavy rain are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
central and southern Delaware...and eastern Maryland.
LAT...LON 3874 7634 3890 7579 3919 7560 3905 7532
3895 7535 3872 7568 3869 7572 3870 7590
3866 7596 3857 7602 3863 7608 3864 7614
3868 7617 3868 7621 3876 7622 3871 7628
3874 7629 3873 7633
TIME...MOT...LOC 0034Z 317DEG 26KT 3908 7556 3875 7564 3858 7617
$$
DEC001-005-MDC011-041-070045-
/O.CON.KPHI.SV.W.0144.000000T0000Z-200707T0045Z/
Sussex DE-Kent DE-Talbot MD-Caroline MD-
835 PM EDT Mon Jul 6 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR NORTHWESTERN SUSSEX...SOUTHERN KENT...CENTRAL TALBOT AND SOUTHERN
CAROLINE COUNTIES...
At 834 PM EDT, severe thunderstorms were located along a line
extending from Woodside to Bridgeville to near University Of Maryland
Center For Environmental Studies, 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...
Dover, Easton, Milford, Denton, Harrington, Camden, Trappe, Preston,
Oxford, Bowers, Woodside, Viola, Smithville, Rising Sun-Lebanon,
Hazlettville, Agner, Choptank, Dover Base Housing, Windyhill and
Andrewsville.
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.
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 3874 7634 3890 7579 3919 7560 3905 7532
3895 7535 3872 7568 3869 7572 3870 7590
3866 7596 3857 7602 3863 7608 3864 7614
3868 7617 3868 7621 3876 7622 3871 7628
3874 7629 3873 7633
TIME...MOT...LOC 0034Z 317DEG 26KT 3908 7556 3875 7564 3858 7617
HAIL...<.75IN
WIND...60MPH
$$
RobertsonThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 3:16 AM EDT | Heat Advisory | PHI | New Castle | 12 hr |
| Jul 6, 12:52 PM EDT | Flash Flood Watch | PHI | New Castle | 8 hr |
| Jul 6, 5:43 PM EDT | Areal Flood Advisory | PHI | New Castle | 3 hr |
| Jul 6, 6:00 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 60 min |
| Jul 6, 6:13 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 48 min |
| Jul 6, 6:37 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 53 min |
| Jul 6, 7:48 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 117 min |
| Jul 6, 4:49 PM EDT | Special Weather Statement | PHI | Cecil | 56 min |
| Jul 6, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 61 min |
| Jul 6, 7:03 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 42 min |
| Jul 6, 7:23 PM EDT | Tornado Warning | PHI | Caroline, Kent, Queen Anne's | 19 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.