Alert archive / Maryland / Tornado Warnings in 2020
Tornado Warning 19, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Aug 4, 2020, 8:27 AM EDT for Kent County, Delaware; 4 counties in Maryland. It was in force for 33 min. 1 report 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
- Aug 4, 2020, 8:27 AM EDT (12:27 UTC)
- Expired
- Aug 4, 2020, 9:00 AM EDT
- In force
- 33 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Kent County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 58 km from the middle of the area, began a volume at 12:27 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 |
|---|---|---|---|
| Aug 4, 8:30 AM EDT | TORNADO | Sandtown, DE | CALL CENTER REPORTS A TORNADO ON SANDTOWN ROAD. 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 |
|---|---|---|---|
| Aug 4, 2:26 AM EDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 0.5 hours before the alert went out and 151 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
- 472 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 648 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 254 m²/s²
- 0-3 km storm-relative helicity
- 273 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 2.9
The text
As transmitted.
020
WFUS51 KPHI 041227
TORPHI
DEC001-MDC011-015-029-035-041300-
/O.NEW.KPHI.TO.W.0019.200804T1227Z-200804T1300Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mount Holly NJ
827 AM EDT Tue Aug 4 2020
The National Weather Service in Mount Holly NJ has issued a
* Tornado Warning for...
Southwestern Kent County in central Delaware...
Northeastern Queen Anne's County in northeastern Maryland...
Northeastern Caroline County in eastern Maryland...
Northeastern Kent County in northeastern Maryland...
Southern Cecil County in northeastern Maryland...
* Until 900 AM EDT.
* At 826 AM EDT, a severe thunderstorm capable of producing a tornado
was located over Sandtown, or 14 miles southwest of Dover, moving
northwest at 55 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* Locations impacted include...
Millington, Sudlersville, Goldsboro, Morgnec, Massey, Crumpton,
Sandtown, Kennedyville, Galena, Henderson, Marydel, Templeville and
Barclay.
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.
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 3937 7591 3936 7589 3937 7584 3895 7563
3893 7574 3931 7610
TIME...MOT...LOC 1226Z 149DEG 47KT 3902 7571
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
SFJ2 follow-up statements
954
WWUS51 KPHI 041241
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
841 AM EDT Tue Aug 4 2020
DEC001-MDC011-015-029-035-041300-
/O.CON.KPHI.TO.W.0019.000000T0000Z-200804T1300Z/
Kent DE-Queen Anne's MD-Caroline MD-Kent MD-Cecil MD-
841 AM EDT Tue Aug 4 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 AM EDT FOR WEST
CENTRAL KENT...NORTHEASTERN QUEEN ANNE'S...NORTHEASTERN CAROLINE...
NORTHEASTERN KENT AND SOUTHERN CECIL COUNTIES...
At 840 AM EDT, a confirmed tornado was located over Sudlersville, or
15 miles northeast of Centerville, moving northwest at 55 mph.
HAZARD...Damaging tornado.
SOURCE...Law enforcement confirmed tornado.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Millington, Sudlersville, Morgnec, Massey, Crumpton, Kennedyville,
Galena, Henderson, Marydel, Templeville and Barclay.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
To repeat, a tornado is has been confirmed. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.
&&
LAT...LON 3937 7591 3936 7589 3937 7584 3905 7568
3904 7584 3931 7610
TIME...MOT...LOC 1240Z 149DEG 47KT 3919 7584
TORNADO...OBSERVED
HAIL...0.00IN
$$
SFJ201
WWUS51 KPHI 041253
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
853 AM EDT Tue Aug 4 2020
DEC001-MDC011-015-029-035-041303-
/O.EXP.KPHI.TO.W.0019.000000T0000Z-200804T1300Z/
Kent DE-Queen Anne's MD-Caroline MD-Kent MD-Cecil MD-
853 AM EDT Tue Aug 4 2020
...THE TORNADO WARNING FOR WEST CENTRAL KENT...NORTHEASTERN QUEEN
ANNE'S...NORTHEASTERN CAROLINE...NORTHEASTERN KENT AND SOUTHERN CECIL
COUNTIES WILL EXPIRE AT 900 AM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.
A Tornado Watch remains in effect until noon EDT for central
Delaware...and eastern and northeastern Maryland.
LAT...LON 3937 7591 3936 7589 3937 7584 3905 7568
3904 7584 3931 7610
TIME...MOT...LOC 1253Z 149DEG 47KT 3933 7595
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 4:50 AM EDT | Tornado Warning | PHI | Sussex | 25 min |
| Aug 4, 5:17 AM EDT | Areal Flood Advisory | PHI | New Castle | 4 hr |
| Aug 4, 7:28 AM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Aug 4, 7:39 AM EDT | Tornado Warning | PHI | Sussex | 36 min |
| Aug 4, 7:51 AM EDT | Tornado Warning | PHI | Sussex | 24 min |
| Aug 4, 8:15 AM EDT | Tornado Warning | PHI | Kent | 45 min |
| Aug 4, 8:18 AM EDT | Tornado Warning | PHI | Sussex | 27 min |
| Aug 4, 8:56 AM EDT | Tornado Warning | PHI | Kent, New Castle | 34 min |
| Aug 4, 8:58 AM EDT | Flash Flood Warning | PHI | Kent, New Castle, Sussex | 3 hr |
| Aug 4, 9:06 AM EDT | River Flood Warning | PHI | New Castle | 11 hr |
| Aug 4, 9:23 AM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Aug 4, 9:23 AM EDT | Tornado Warning | PHI | New Castle | 22 min |
| Aug 4, 10:02 AM EDT | Flash Flood Warning | PHI | New Castle | 4 hr |
| Aug 4, 10:38 AM EDT | River Flood Warning | PHI | New Castle | 14 hr |
| Aug 4, 12:27 PM EDT | River Flood Warning | PHI | New Castle | 10 hr |
| Aug 4, 12:48 PM EDT | River Flood Warning | PHI | New Castle | 24 hr |
| Aug 4, 1:59 PM EDT | Areal Flood Warning | PHI | New Castle | 9 hr |
| Aug 4, 1:33 AM EDT | Areal Flood Advisory | PHI | Caroline, Kent, Queen Anne's, Talbot | 4 hr |
| Aug 4, 2:10 AM EDT | Flash Flood Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 4 hr |
| Aug 4, 6:55 AM EDT | Tornado Warning | PHI | Kent, Queen Anne's | 35 min |
| Aug 4, 7:22 AM EDT | Tornado Warning | PHI | Kent, Queen Anne's | 23 min |
| Aug 4, 7:50 AM EDT | Flash Flood Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 4 hr |
| Aug 4, 8:13 AM EDT | Tornado Warning | PHI | Kent, Queen Anne's, Talbot | 26 min |
| Aug 4, 8:50 AM EDT | Flash Flood Warning | PHI | Caroline, Cecil, Kent, Queen Anne's | 4 hr |
Nearby
Tornado Warnings in Maryland, 2020Tornado Warnings in Delaware, 2020Every tornado warning in 2020Tornadoes 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.