Alert archive / Maryland / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 101, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2017, 5:40 PM EDT for 4 counties in Maryland; Kent County, Delaware. It was in force for 65 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 14, 2017, 5:40 PM EDT (21:40 UTC)
- Expired
- Jul 14, 2017, 6:45 PM EDT
- In force
- 65 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Kent County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 65 km from the middle of the area, began a volume at 21:41 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 14, 5:41 PM EDT | TSTM WND DMG | Centreville, MD | TREE DOWN ON A BUILDING ON CLARK ROAD. |
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 14, 1:40 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.7 hours before the alert went out and 106 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
- 403 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 1367 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
480
WUUS51 KPHI 142140
SVRPHI
DEC001-MDC011-029-035-041-142245-
/O.NEW.KPHI.SV.W.0101.170714T2140Z-170714T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
540 PM EDT FRI JUL 14 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
West central Kent County in central Delaware...
Northern Talbot County in eastern Maryland...
Queen Anne's County in northeastern Maryland...
Caroline County in eastern Maryland...
Southwestern Kent County in northeastern Maryland...
* Until 645 PM EDT
* At 539 PM EDT, severe thunderstorms were located along a line
extending from near Old Town to near Stevensville to near Shady
Side, moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect damage to
trees and power lines.
* Severe thunderstorms will be near,
Centerville, Centreville, Starkey Corner and Old Town around 545
PM EDT.
Church Hill and Carville around 550 PM EDT.
Grasonville, Overton and Hope around 555 PM EDT.
St. Michaels around 605 PM EDT.
Goldsboro, Copperville and Wye Mills around 610 PM EDT.
Skipton around 615 PM EDT.
Easton, Starr and Sandtown around 620 PM EDT.
Queen Anne and Cordova around 625 PM EDT.
Other locations impacted by these severe thunderstorms include
Felton, Queenstown, Woodside East, Marydel, Hillsboro, Stevensville
South, Romancoke, Riverview, Henderson and Dominion.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3903 7631 3904 7631 3898 7628 3900 7617
3901 7621 3902 7623 3909 7623 3917 7606
3906 7544 3892 7578 3873 7586 3878 7632
3886 7626 3879 7620 3879 7619 3897 7625
3891 7624 3884 7637 3885 7638
TIME...MOT...LOC 2139Z 277DEG 26KT 3911 7608 3899 7637 3884 7645
HAIL...1.00IN
WIND...60MPH
$$
Robertson2 follow-up statements
506
WWUS51 KPHI 142210
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
610 PM EDT FRI JUL 14 2017
MDC029-142219-
/O.CAN.KPHI.SV.W.0101.000000T0000Z-170714T2245Z/
Kent MD-
610 PM EDT FRI JUL 14 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN KENT COUNTY IS
CANCELLED...
The storms which prompted the warning have weakened and moved out of
the warned area. Therefore, the warning has been cancelled. However
heavy rain and gusty winds remain possible.
A severe thunderstorm watch remains in effect until 900 PM EDT for
central Delaware...and eastern and northeastern Maryland.
LAT...LON 3878 7631 3883 7623 3879 7620 3879 7619
3884 7621 3890 7611 3915 7594 3906 7544
3892 7578 3873 7586
TIME...MOT...LOC 2209Z 284DEG 31KT 3909 7586 3888 7601 3874 7625
$$
DEC001-MDC011-035-041-142245-
/O.CON.KPHI.SV.W.0101.000000T0000Z-170714T2245Z/
Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-
610 PM EDT FRI JUL 14 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR WEST CENTRAL KENT...NORTHERN TALBOT...SOUTHEASTERN QUEEN ANNE'S
AND CAROLINE COUNTIES...
At 609 PM EDT, severe thunderstorms were located along a line
extending from near Goldsboro to Cordova to near St. Michaels, moving
east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect damage to
trees and power lines.
These severe storms will be near...
Oakland, Goldsboro, Queen Anne, Matthews and Jumptown around 615
PM EDT.
Greensboro, Ridgely and Griffin around 620 PM EDT.
Denton, Sandtown and Harmony around 625 PM EDT.
Woodside, Viola and Tanyard around 635 PM EDT.
Other locations impacted by these severe thunderstorms include
Felton, Woodside East, Marydel, Riverview, Hillsboro and Henderson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3878 7631 3883 7623 3879 7620 3879 7619
3884 7621 3890 7611 3915 7594 3906 7544
3892 7578 3873 7586
TIME...MOT...LOC 2209Z 284DEG 31KT 3909 7586 3888 7601 3874 7625
HAIL...1.00IN
WIND...60MPH
$$
Robertson535
WWUS51 KPHI 142236
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
636 PM EDT FRI JUL 14 2017
DEC001-MDC011-035-041-142246-
/O.EXP.KPHI.SV.W.0101.000000T0000Z-170714T2245Z/
Kent DE-Talbot MD-Queen Anne's MD-Caroline MD-
636 PM EDT FRI JUL 14 2017
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL KENT...NORTHERN
TALBOT...SOUTHEASTERN QUEEN ANNE'S AND CAROLINE COUNTIES WILL EXPIRE
AT 645 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore the warning will
be allowed to expire. However gusty winds and heavy rain are still
possible with these thunderstorms.
A severe thunderstorm watch remains in effect until 900 PM EDT for
central Delaware...and eastern and northeastern Maryland.
Remember, a Severe Thunderstorm Warning still remains in effect for
portions of Talbot...Caroline...and Kent counites.
LAT...LON 3878 7631 3883 7623 3879 7620 3879 7619
3884 7621 3890 7611 3915 7594 3906 7544
3892 7578 3873 7586
TIME...MOT...LOC 2236Z 277DEG 26KT 3907 7563 3886 7578 3872 7602
$$
RobertsonThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 10:03 PM EDT | Special Weather Statement | PHI | Caroline | 27 min |
| Jul 13, 10:15 PM EDT | Areal Flood Advisory | PHI | Caroline, Talbot | 4 hr |
| Jul 14, 9:23 AM EDT | Special Weather Statement | PHI | Cecil | 37 min |
| Jul 14, 11:40 AM EDT | Flash Flood Watch | PHI | Cecil, Kent, Queen Anne's | 11 hr |
| Jul 14, 12:06 PM EDT | Heat Advisory | PHI | Caroline, Kent, Queen Anne's, Talbot | 7 hr |
| Jul 14, 2:31 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 59 min |
| Jul 14, 2:46 PM EDT | Areal Flood Advisory | PHI | Cecil | 3 hr |
| Jul 14, 3:10 PM EDT | Flash Flood Warning | PHI | Cecil | 2 hr |
| Jul 14, 3:18 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 12 min |
| Jul 14, 3:23 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 67 min |
| Jul 14, 3:52 PM EDT | Flash Flood Warning | PHI | Talbot | 53 min |
| Jul 14, 3:57 PM EDT | Flash Flood Warning | PHI | Cecil, Kent | 2 hr |
| Jul 14, 4:00 PM EDT | Special Weather Statement | PHI | Caroline | 45 min |
| Jul 14, 4:05 PM EDT | Special Weather Statement | PHI | Kent | 40 min |
| Jul 14, 4:48 PM EDT | Special Weather Statement | PHI | Queen Anne's | 27 min |
| Jul 14, 4:59 PM EDT | Flash Flood Warning | PHI | Queen Anne's | 4 hr |
| Jul 14, 5:27 PM EDT | Special Weather Statement | PHI | Queen Anne's | 63 min |
| Jul 14, 5:54 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 51 min |
| Jul 14, 5:58 PM EDT | Flash Flood Warning | PHI | Talbot | 3 hr |
| Jul 14, 6:10 PM EDT | Flash Flood Warning | PHI | Caroline | 3 hr |
| Jul 14, 6:20 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 40 min |
| Jul 13, 8:09 PM EDT | Special Weather Statement | PHI | Kent | 36 min |
| Jul 13, 8:29 PM EDT | Special Weather Statement | PHI | Kent | 31 min |
| Jul 13, 10:39 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 51 min |
| Jul 14, 9:02 AM EDT | Special Weather Statement | PHI | New Castle | 28 min |
| Jul 14, 2:14 PM EDT | Areal Flood Advisory | PHI | New Castle | 3 hr |
| Jul 14, 2:53 PM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Jul 14, 3:25 PM EDT | Areal Flood Advisory | PHI | New Castle | 4 hr |
| Jul 14, 3:34 PM EDT | Flash Flood Warning | PHI | New Castle | 3 hr |
| Jul 14, 3:54 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 66 min |
| Jul 14, 5:14 PM EDT | Areal Flood Advisory | PHI | Kent | 3 hr |
| Jul 14, 5:24 PM EDT | Special Weather Statement | PHI | Sussex | 36 min |
| Jul 14, 5:30 PM EDT | River Flood Warning | PHI | New Castle | 7 hr |
| Jul 14, 5:51 PM EDT | Special Weather Statement | PHI | Sussex | 39 min |
| Jul 14, 6:32 PM EDT | Areal Flood Advisory | PHI | Sussex | 4 hr |
| Jul 14, 6:48 PM EDT | Special Weather Statement | PHI | Sussex | 42 min |
| Jul 14, 7:15 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 60 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2017Severe Thunderstorm Warnings in Delaware, 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.