Alert archive / Maryland / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 27, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 9, 2018, 1:21 PM EDT for Caroline County, Queen Anne's County, Maryland; Kent County, Delaware. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 9, 2018, 1:21 PM EDT (17:21 UTC)
- Expired
- Jun 9, 2018, 2:00 PM EDT
- In force
- 39 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Kent County, DE, Caroline County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 35 km from the middle of the area, began a volume at 17:23 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.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 5.4 hours before the alert went out and 133 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
- 733 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 972 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
603
WUUS51 KPHI 091721
SVRPHI
DEC001-MDC011-035-091800-
/O.NEW.KPHI.SV.W.0027.180609T1721Z-180609T1800Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
121 PM EDT SAT JUN 9 2018
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Kent County in central Delaware...
Eastern Queen Anne's County in northeastern Maryland...
Northern Caroline County in eastern Maryland...
* Until 200 PM EDT.
* At 120 PM EDT, a severe thunderstorm was located over Hazlettville,
or near Dover, moving east at 25 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to
roofs, siding, trees, and power lines is possible.
* Locations impacted include...
Dover, Camden, Cheswold, Bowers, Goldsboro, Woodside, Viola,
Hartly, Rising Sun-Lebanon, Hazlettville, Dover Base Housing, Dover
Speedway, Sandtown, Rising Sun, Wyoming, Felton, Frederica,
Magnolia, Little Creek and Henderson.
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, and
the storm will affect the beaches. For your safety, immediately move
off the beach and seek shelter indoors.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3920 7577 3924 7537 3905 7537 3900 7533
3903 7579
TIME...MOT...LOC 1720Z 268DEG 20KT 3912 7563
HAIL...1.25IN
WIND...60MPH
$$
JRK2 follow-up statements
909
WWUS51 KPHI 091741
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
141 PM EDT SAT JUN 9 2018
MDC011-035-091750-
/O.CAN.KPHI.SV.W.0027.000000T0000Z-180609T1800Z/
Queen Anne's MD-Caroline MD-
141 PM EDT SAT JUN 9 2018
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN QUEEN ANNE'S AND
NORTHERN CAROLINE COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3901 7546 3903 7559 3909 7569 3921 7564
3924 7537 3905 7537 3900 7533
TIME...MOT...LOC 1740Z 269DEG 15KT 3913 7551
$$
DEC001-091800-
/O.CON.KPHI.SV.W.0027.000000T0000Z-180609T1800Z/
Kent DE-
141 PM EDT SAT JUN 9 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM EDT
FOR CENTRAL KENT COUNTY...
At 140 PM EDT, a severe thunderstorm was located over Dover Base
Housing, or over Dover, moving east at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Dover, Camden, Cheswold, Bowers, Woodside, Viola, Rising Sun-Lebanon,
Rising Sun, Hazlettville, Dover Base Housing, Dover Speedway,
Wyoming, Frederica, Magnolia, Little Creek, Rodney Village, Kent
Acres, Riverview, Highland Acres and Woodside East.
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, and
the storm will affect the beaches. For your safety, immediately move
off the beach and seek shelter indoors.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3901 7546 3903 7559 3909 7569 3921 7564
3924 7537 3905 7537 3900 7533
TIME...MOT...LOC 1740Z 269DEG 15KT 3913 7551
HAIL...<.75IN
WIND...60MPH
$$
JRK278
WWUS51 KPHI 091753
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
153 PM EDT SAT JUN 9 2018
DEC001-091803-
/O.EXP.KPHI.SV.W.0027.000000T0000Z-180609T1800Z/
Kent DE-
153 PM EDT SAT JUN 9 2018
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL KENT COUNTY WILL
EXPIRE AT 200 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However heavy rain
is still possible with this thunderstorm.
LAT...LON 3901 7546 3903 7559 3909 7569 3921 7564
3924 7537 3905 7537 3900 7533
TIME...MOT...LOC 1753Z 268DEG 20KT 3913 7542
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 2:00 PM EDT | Special Weather Statement | PHI | Caroline | 30 min |
| Jun 9, 2:24 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 51 min |
| Jun 9, 2:42 PM EDT | Areal Flood Advisory | PHI | Caroline | 58 min |
| Jun 9, 3:53 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 37 min |
| Jun 9, 4:24 PM EDT | Special Weather Statement | PHI | Kent | 51 min |
| Jun 9, 5:31 PM EDT | Special Weather Statement | PHI | Caroline | 44 min |
| Jun 9, 12:51 PM EDT | Special Weather Statement | PHI | Sussex | 24 min |
| Jun 9, 1:04 PM EDT | Special Weather Statement | PHI | Kent | 56 min |
| Jun 9, 1:25 PM EDT | Flash Flood Warning | PHI | Sussex | 4 hr |
| Jun 9, 1:35 PM EDT | Areal Flood Advisory | PHI | Kent | 71 min |
| Jun 9, 1:35 PM EDT | Special Weather Statement | PHI | Sussex | 25 min |
| Jun 9, 2:48 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 42 min |
| Jun 9, 2:53 PM EDT | Flash Flood Warning | PHI | Sussex | 4 hr |
| Jun 9, 3:06 PM EDT | Special Weather Statement | PHI | New Castle | 24 min |
| Jun 9, 3:26 PM EDT | Special Weather Statement | PHI | Sussex | 34 min |
| Jun 9, 3:45 PM EDT | Special Weather Statement | PHI | Kent | 45 min |
| Jun 9, 3:47 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 3 hr |
| Jun 9, 4:06 PM EDT | Special Weather Statement | PHI | Sussex | 39 min |
| Jun 9, 4:15 PM EDT | Flash Flood Warning | PHI | Sussex | 3 hr |
| Jun 9, 4:20 PM EDT | Flash Flood Warning | PHI | Kent | 3 hr |
| Jun 9, 5:44 PM EDT | Areal Flood Warning | PHI | Sussex | 4 hr |
| Jun 9, 6:44 PM EDT | Areal Flood Warning | PHI | Sussex | 3 hr |
Nearby
Severe Thunderstorm Warnings in Maryland, 2018Severe Thunderstorm Warnings in Delaware, 2018Every severe thunderstorm warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.