Alert archive / Maryland / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 150, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2020, 10:21 PM EDT for Caroline County, Kent County, Queen Anne's County, Maryland; Kent County, Delaware. It was in force for 54 min. 6 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 21, 2020, 10:21 PM EDT (02:21 UTC)
- Expired
- Jul 21, 2020, 11:15 PM EDT
- In force
- 54 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kent County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 51 km from the middle of the area, began a volume at 02:24 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 21, 10:23 PM EDT | TSTM WND DMG | 1 Nnw Sudlersville, MD | TWO TREES REPORTED DOWN BETWEEN SUDLERSVILLE AND CRUMPTON. TIME ESTIMATED FROM RADAR. |
| Jul 21, 10:23 PM EDT | TSTM WND DMG | 1 Nnw Sudlersville, MD | TWO TREES REPORTED DOWN BETWEEN SUDLERSVILLE AND CRUMPTON. TIME ESTIMATED FROM RADAR. |
| Jul 21, 10:30 PM EDT | TSTM WND DMG | 2 Se Hartly, DE | SEVERAL REPORTS OF TREES AND WIRES DOWN NEAR CRYSTAL ROAD SOUTHEAST OF HARTLY. TIME ESTIMATED FROM RADAR. |
| Jul 21, 10:32 PM EDT | TSTM WND DMG | 2 Se Hartly, DE | DOWNED POWER POLE AND WIRES NEAR JUDITH ROAD NEAR HARTLY. TIME ESTIMATED FROM RADAR. |
| Jul 21, 11:14 PM EDT | TSTM WND GST 43 | 3 Ssw Little Creek, DE | KDOV MEASURED GUST. |
| Jul 21, 11:14 PM EDT | MARINE TSTM WIND 43 | 3 Ssw Little Creek, DE |
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, 2.4 hours before the alert went out and 148 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
- 3628 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1027 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
591
WUUS51 KPHI 220221
SVRPHI
DEC001-MDC011-029-035-220315-
/O.NEW.KPHI.SV.W.0150.200722T0221Z-200722T0315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1021 PM EDT Tue Jul 21 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Kent County in central Delaware...
Northeastern Queen Anne's County in northeastern Maryland...
Northeastern Caroline County in eastern Maryland...
East central Kent County in northeastern Maryland...
* Until 1115 PM EDT.
* At 1021 PM EDT, a severe thunderstorm was located over
Sudlersville, or 13 miles northeast of Centerville, moving east at
20 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, Smyrna, Camden, Clayton, Cheswold, Millington, Sudlersville,
Bowers, Goldsboro, Woodside, Viola, Hartly, Rising Sun-Lebanon,
Woodland Beach, Hazlettville, Dover Base Housing, Crumpton, Dover
Speedway, Rising Sun and Wyoming.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of
a building.
In addition to 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 3924 7597 3930 7568 3929 7565 3931 7562
3931 7558 3932 7557 3935 7542 3904 7535
3904 7591
TIME...MOT...LOC 0221Z 265DEG 18KT 3916 7586
HAIL...0.75IN
WIND...60MPH
$$
Gorse3 follow-up statements
291
WWUS51 KPHI 220239
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1039 PM EDT Tue Jul 21 2020
DEC001-MDC011-029-035-220315-
/O.CON.KPHI.SV.W.0150.000000T0000Z-200722T0315Z/
Kent DE-Queen Anne's MD-Caroline MD-Kent MD-
1039 PM EDT Tue Jul 21 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT
FOR CENTRAL KENT...NORTHEASTERN QUEEN ANNE'S...NORTHEASTERN CAROLINE
AND EAST CENTRAL KENT COUNTIES...
At 1038 PM EDT, a severe thunderstorm was located over Hartly, or 8
miles west of Dover, moving east at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Dover, Smyrna, Camden, Clayton, Cheswold, Millington, Sudlersville,
Bowers, Goldsboro, Woodside, Viola, Hartly, Rising Sun-Lebanon,
Woodland Beach, Hazlettville, Dover Base Housing, Dover Speedway,
Rising Sun, Wyoming and Kenton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 3930 7569 3929 7565 3931 7562 3931 7558
3932 7557 3935 7542 3904 7535 3904 7586
3926 7586
TIME...MOT...LOC 0238Z 265DEG 26KT 3917 7568
HAIL...0.75IN
WIND...60MPH
$$
Gorse014
WWUS51 KPHI 220254
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1054 PM EDT Tue Jul 21 2020
MDC011-029-035-220303-
/O.CAN.KPHI.SV.W.0150.000000T0000Z-200722T0315Z/
Queen Anne's MD-Caroline MD-Kent MD-
1054 PM EDT Tue Jul 21 2020
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN QUEEN ANNE'S...
NORTHEASTERN CAROLINE AND EAST CENTRAL KENT COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3930 7569 3929 7565 3931 7562 3931 7558
3932 7557 3935 7542 3904 7535 3904 7572
3929 7573
TIME...MOT...LOC 0253Z 271DEG 21KT 3916 7555
$$
DEC001-220315-
/O.CON.KPHI.SV.W.0150.000000T0000Z-200722T0315Z/
Kent DE-
1054 PM EDT Tue Jul 21 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT
FOR CENTRAL KENT COUNTY...
At 1053 PM EDT, a severe thunderstorm was located over Dover, moving
east at 25 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Dover, Smyrna, Camden, Clayton, Cheswold, Bowers, Woodside, Viola,
Hartly, Rising Sun-Lebanon, Woodland Beach, Rising Sun, Hazlettville,
Dover Base Housing, Dover Speedway, Wyoming, Kenton, Magnolia, Little
Creek and Leipsic.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.
&&
LAT...LON 3930 7569 3929 7565 3931 7562 3931 7558
3932 7557 3935 7542 3904 7535 3904 7572
3929 7573
TIME...MOT...LOC 0253Z 271DEG 21KT 3916 7555
HAIL...0.75IN
WIND...60MPH
$$
Gorse979
WWUS51 KPHI 220312
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1112 PM EDT Tue Jul 21 2020
DEC001-220322-
/O.EXP.KPHI.SV.W.0150.000000T0000Z-200722T0315Z/
Kent DE-
1112 PM EDT Tue Jul 21 2020
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL KENT COUNTY WILL
EXPIRE AT 1115 PM 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 are still possible with this thunderstorm.
LAT...LON 3930 7569 3929 7565 3931 7562 3931 7558
3932 7557 3935 7542 3904 7535 3904 7572
3929 7573
TIME...MOT...LOC 0312Z 265DEG 18KT 3917 7543
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 9:16 PM EDT | Special Weather Statement | PHI | Kent | 29 min |
| Jul 21, 9:25 PM EDT | Special Weather Statement | PHI | Talbot | 35 min |
| Jul 21, 9:39 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 51 min |
| Jul 21, 9:46 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 29 min |
| Jul 21, 10:14 PM EDT | Special Weather Statement | PHI | Caroline | 46 min |
| Jul 22, 4:01 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 22 min |
| Jul 22, 4:38 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 52 min |
| Jul 22, 4:47 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 43 min |
| Jul 22, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 47 min |
| Jul 22, 5:23 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 52 min |
| Jul 22, 5:54 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's | 51 min |
| Jul 22, 5:33 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 57 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.