Alert archive / Maryland / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 75, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2017, 4:38 PM EDT for Cecil County, Kent County, Queen Anne's County, Maryland. It was in force for 67 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
- Jul 1, 2017, 4:38 PM EDT (20:38 UTC)
- Expired
- Jul 1, 2017, 5:45 PM EDT
- In force
- 67 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Cecil County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 78 km from the middle of the area, began a volume at 20:40 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 1, 4:58 PM EDT | HAIL 0.25 | Rising Sun, MD |
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 1, 1:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.6 hours before the alert went out and 114 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
- 160 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 564 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
770
WUUS51 KPHI 012038
SVRPHI
MDC015-029-035-012145-
/O.NEW.KPHI.SV.W.0075.170701T2038Z-170701T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
438 PM EDT SAT JUL 1 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Central Queen Anne's County in northeastern Maryland...
Kent County in northeastern Maryland...
Cecil County in northeastern Maryland...
* Until 545 PM EDT
* At 438 PM EDT, severe thunderstorms were located along a line
extending from White Marsh to Back River to near Millers Island to
near Gibson Island, moving northeast at 20 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Elkton, Havre De Grace, Calvert, Chestertown, Centreville, North
East, Rising Sun, Rock Hall, Charlestown, Church Hill, Cecilton,
Millington, Sudlersville, Betterton, Zion, Barksdale, Old Town,
Newtown, West Nottingham and Octoraro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3904 7631 3901 7628 3905 7623 3917 7628
3926 7622 3929 7617 3932 7618 3942 7600
3952 7598 3955 7603 3955 7609 3972 7623
3971 7581 3926 7577 3909 7595 3901 7622
3902 7625 3897 7634
TIME...MOT...LOC 2038Z 239DEG 19KT 3937 7642 3927 7646 3922 7636 3905
7636
HAIL...0.88IN
WIND...60MPH
$$
SFJ2 follow-up statements
697
WWUS51 KPHI 012055
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
455 PM EDT SAT JUL 1 2017
MDC015-029-035-012145-
/O.CON.KPHI.SV.W.0075.000000T0000Z-170701T2145Z/
Queen Anne's MD-Kent MD-Cecil MD-
455 PM EDT SAT JUL 1 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR CENTRAL QUEEN ANNE'S...KENT AND CECIL COUNTIES...
At 455 PM EDT, severe thunderstorms were located along a line
extending from near Kingsville to Bowleys Quarters to 7 miles
southwest of Newtown to near Rock Hall, moving northeast at 20 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Elkton, Havre De Grace, Calvert, Chestertown, Centreville, North
East, Rising Sun, Rock Hall, Charlestown, Church Hill, Cecilton,
Millington, Sudlersville, Betterton, Zion, Barksdale, Old Town,
Newtown, West Nottingham and Octoraro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
&&
LAT...LON 3904 7631 3901 7628 3905 7623 3917 7628
3926 7622 3929 7617 3932 7618 3942 7600
3952 7598 3955 7603 3955 7609 3972 7623
3971 7581 3926 7577 3909 7595 3901 7622
3902 7625 3897 7634
TIME...MOT...LOC 2055Z 239DEG 19KT 3941 7633 3931 7637 3926 7627 3909
7627
TORNADO...POSSIBLE
HAIL...0.88IN
WIND...60MPH
$$
SFJ104
WWUS51 KPHI 012120
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
520 PM EDT SAT JUL 1 2017
MDC015-029-035-012145-
/O.CON.KPHI.SV.W.0075.000000T0000Z-170701T2145Z/
Queen Anne's MD-Kent MD-Cecil MD-
520 PM EDT SAT JUL 1 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHEASTERN QUEEN ANNE'S...KENT AND CECIL COUNTIES...
At 520 PM EDT, severe thunderstorms were located along a line
extending from North East to near Hollywood Beach to near Starkey
Corner, moving east at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Elkton, Havre De Grace, Calvert, Chestertown, Centreville, North
East, Charlestown, Church Hill, Cecilton, Millington, Sudlersville,
Betterton, Zion, Barksdale, Old Town, Newtown, Brantwood, Morgnec,
Fair Hill and Crumpton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
&&
LAT...LON 3929 7617 3932 7618 3942 7600 3952 7598
3955 7603 3955 7609 3971 7603 3971 7581
3926 7577 3909 7595 3902 7618
TIME...MOT...LOC 2120Z 255DEG 36KT 3962 7593 3944 7594 3910 7597
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 4:12 PM EDT | Special Weather Statement | PHI | Cecil, Kent, Queen Anne's, Talbot | 33 min |
| Jul 1, 5:03 PM EDT | Special Weather Statement | PHI | Queen Anne's, Talbot | 27 min |
| Jul 1, 5:20 PM EDT | Areal Flood Advisory | PHI | Cecil, Kent, Queen Anne's | 4 hr |
| Jul 1, 5:39 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 51 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2017Every severe thunderstorm warning in 2017
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.