Alert archive / Delaware / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 208, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 6, 2020, 7:13 AM EDT for Kent County, Sussex County, Delaware. It was in force for 47 min. 3 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
- Aug 6, 2020, 7:13 AM EDT (11:13 UTC)
- Expired
- Aug 6, 2020, 8:00 AM EDT
- In force
- 47 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Kent County, DE, Sussex County, DE
The radar
The Dover AFB radar (KDOX), 6 km from the middle of the area, began a volume at 11:14 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 6, 7:17 AM EDT | TSTM WND DMG | 1 Ene Greenwood, DE | SEVERAL REPORTS OF DOWNED POWER LINES IN THE GREENWOOD AREA. TIME ESTIMATED FROM RADAR. |
| Aug 6, 7:25 AM EDT | TSTM WND DMG | 3 S Houston, DE | TREE ON WIRES NEAR TEATOWN ROAD SOUTH OF HOUSTON. TIME ESTIMATED FROM RADAR. |
| Aug 6, 7:50 AM EDT | TSTM WND DMG | 3 Ssw Milton, DE | REPORTS OF WIRES DOWN NEAR MILTON. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 11.2 hours before the alert went out and 94 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
- 1920 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 772 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
880
WUUS51 KPHI 061113
SVRPHI
DEC001-005-061200-
/O.NEW.KPHI.SV.W.0208.200806T1113Z-200806T1200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
713 AM EDT Thu Aug 6 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Sussex County in southern Delaware...
Southern Kent County in central Delaware...
* Until 800 AM EDT.
* At 712 AM EDT, a severe thunderstorm was located near Andrewsville,
or 14 miles northwest of Georgetown, moving east at 25 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Georgetown, Milford, Harrington, Lewes, Milton, Bridgeville,
Ellendale, Henlopen Acres, Cape Henlopen State Park, Andrewsville,
Greenwood, Houston, Dewey Beach and Farmington.
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.
In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.
&&
LAT...LON 3867 7571 3890 7572 3898 7520 3866 7499
TIME...MOT...LOC 1112Z 262DEG 20KT 3881 7562
HAIL...<.75IN
WIND...70MPH
$$
CMS3 follow-up statements
106
WWUS51 KPHI 061128
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
728 AM EDT Thu Aug 6 2020
DEC001-005-061200-
/O.CON.KPHI.SV.W.0208.000000T0000Z-200806T1200Z/
Sussex DE-Kent DE-
728 AM EDT Thu Aug 6 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 AM EDT
FOR CENTRAL SUSSEX AND SOUTHEASTERN KENT COUNTIES...
At 727 AM EDT, a severe thunderstorm was located near Ellendale, or
11 miles northwest of Georgetown, moving east at 25 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Georgetown, Milford, Harrington, Lewes, Milton, Bridgeville,
Ellendale, Henlopen Acres, Cape Henlopen State Park, Andrewsville,
Greenwood, Houston, Dewey Beach and Farmington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 3867 7565 3890 7564 3898 7520 3866 7499
TIME...MOT...LOC 1127Z 262DEG 20KT 3882 7551
HAIL...<.75IN
WIND...70MPH
$$
CMS679
WWUS51 KPHI 061140
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
740 AM EDT Thu Aug 6 2020
DEC001-005-061200-
/O.CON.KPHI.SV.W.0208.000000T0000Z-200806T1200Z/
Sussex DE-Kent DE-
740 AM EDT Thu Aug 6 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 AM EDT
FOR NORTHEASTERN SUSSEX AND SOUTHEASTERN KENT COUNTIES...
At 740 AM EDT, a severe thunderstorm was located over Ellendale, or 9
miles north of Georgetown, moving east at 25 mph.
HAZARD...70 mph wind gusts.
SOURCE...Law enforcement. Reports of power lines down have been
received from Greenwood.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Georgetown, Milford, Lewes, Milton, Ellendale, Henlopen Acres, Cape
Henlopen State Park, Houston and Dewey Beach.
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 this storm. 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 3867 7554 3892 7552 3898 7520 3866 7499
TIME...MOT...LOC 1140Z 262DEG 20KT 3883 7542
HAIL...<.75IN
WIND...70MPH
$$
CMS526
WWUS51 KPHI 061159
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
759 AM EDT Thu Aug 6 2020
DEC001-005-061209-
/O.EXP.KPHI.SV.W.0208.000000T0000Z-200806T1200Z/
Sussex DE-Kent DE-
759 AM EDT Thu Aug 6 2020
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SUSSEX AND
SOUTHEASTERN KENT COUNTIES WILL EXPIRE AT 800 AM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However, gusty
winds and heavy rain are still possible with this thunderstorm.
LAT...LON 3867 7554 3892 7552 3898 7520 3866 7499
TIME...MOT...LOC 1159Z 262DEG 20KT 3884 7530
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 3:37 AM EDT | Flash Flood Watch | PHI | Kent, New Castle, Sussex | 44 hr |
| Aug 6, 6:13 AM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle, Sussex | 62 min |
| Aug 6, 6:43 AM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 3 hr |
| Aug 6, 6:49 AM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 41 min |
| Aug 6, 7:13 AM EDT | Flash Flood Warning | PHI | Kent, New Castle | 3 hr |
| Aug 6, 7:18 AM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 42 min |
| Aug 6, 7:46 AM EDT | Special Weather Statement | PHI | Sussex | 29 min |
| Aug 6, 8:16 AM EDT | Severe Thunderstorm Warning | PHI | Sussex | 44 min |
Nearby
Severe 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.