Alert archive / Maryland / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 27, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 5, 2017, 9:00 AM EDT for 5 counties in Maryland. It was in force for 60 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
- May 5, 2017, 9:00 AM EDT (13:00 UTC)
- Expired
- May 5, 2017, 10:00 AM EDT
- In force
- 60 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 68 km from the middle of the area, began a volume at 13:01 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 |
|---|---|---|---|
| May 5, 9:26 AM EDT | TSTM WND DMG | Saint Michaels, MD | TREES DOWN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 1.0 hours before the alert went out and 102 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
- 8 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 473 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 407 m²/s²
- 0-3 km storm-relative helicity
- 508 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
635
WUUS51 KPHI 051300
SVRPHI
MDC011-015-029-035-041-051400-
/O.NEW.KPHI.SV.W.0027.170505T1300Z-170505T1400Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
900 AM EDT FRI MAY 5 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Talbot County in eastern Maryland...
Queen Anne's County in northeastern Maryland...
Caroline County in eastern Maryland...
Kent County in northeastern Maryland...
Southeastern Cecil County in northeastern Maryland...
* Until 1000 AM EDT
* At 856 AM EDT, severe thunderstorms were located along a line
on the western shore of Chesapeake Bay, moving northeast at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Easton, Centerville, Talbot, Chestertown, Denton, Centreville,
Romancoke, Greensboro, Oakland, Ridgely, Rock Hall, Trappe, St.
Michaels, Church Hill, Preston, Cecilton, Millington, Sudlersville,
Goldsboro and Queen Anne.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This severe thunderstorm will produce little lightning. Do not wait
until you hear thunder before taking cover.
&&
LAT...LON 3886 7626 3879 7620 3879 7619 3897 7625
3884 7637 3885 7638 3894 7636 3904 7631
3898 7628 3900 7617 3915 7628 3924 7623
3948 7581 3874 7575 3857 7604 3876 7622
3877 7631 3867 7634 3868 7634 3876 7638
TIME...MOT...LOC 1256Z 219DEG 40KT 3871 7658 3829 7644
HAIL...<.75IN
WIND...60MPH
$$
SFJ2 follow-up statements
261
WWUS51 KPHI 051318
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
918 AM EDT FRI MAY 5 2017
MDC011-015-029-035-041-051400-
/O.CON.KPHI.SV.W.0027.000000T0000Z-170505T1400Z/
Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-Cecil MD-
918 AM EDT FRI MAY 5 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 AM EDT
FOR TALBOT...QUEEN ANNE'S...CAROLINE...KENT AND SOUTHEASTERN CECIL
COUNTIES...
At 917 AM EDT, severe thunderstorms were located along a line
extending from near Romancoke to near Taylors Island, moving
northeast at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Easton, Centerville, Talbot, Chestertown, Denton, Centreville,
Romancoke, Greensboro, Oakland, Ridgely, Rock Hall, Trappe, St.
Michaels, Church Hill, Preston, Cecilton, Millington, Sudlersville,
Goldsboro and Queen Anne.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a DANGEROUS SITUATION. These storms have a history of
producing strong winds. SEEK SHELTER NOW inside a sturdy structure
and stay away from windows.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3886 7626 3879 7620 3879 7619 3897 7625
3884 7637 3885 7638 3894 7636 3904 7631
3898 7628 3900 7617 3915 7628 3924 7623
3948 7581 3874 7575 3857 7604 3876 7622
3877 7631 3867 7634 3868 7634 3876 7638
TIME...MOT...LOC 1317Z 219DEG 40KT 3889 7639 3847 7625
HAIL...<.75IN
WIND...60MPH
$$
SFJ687
WWUS51 KPHI 051329 CCA
SVSPHI
Severe Weather Statement
National Weather Service MOUNT HOLLY NJ
929 AM EDT FRI MAY 5 2017
MDC011-015-029-035-041-051400-
/O.COR.KPHI.SV.W.0027.000000T0000Z-170505T1400Z/
Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-Cecil MD-
929 AM EDT FRI MAY 5 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 AM EDT
FOR TALBOT...QUEEN ANNE'S...CAROLINE...KENT AND SOUTHEASTERN CECIL
COUNTIES...
At 925 AM EDT, severe thunderstorms were located along a line
extending from near Chester to near University Of Maryland Center For
Environmental Studies, moving northeast at 45 mph.
HAZARD...60 mph wind gusts. A brief tornado is also possible.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Easton, Centerville, Talbot, Chestertown, Denton, Centreville,
Romancoke, Greensboro, Oakland, Ridgely, Rock Hall, Trappe, St.
Michaels, Church Hill, Preston, Cecilton, Millington, Sudlersville,
Goldsboro and Queen Anne.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
These storms could also produce a brief tornado along their line
with locally enhanced damage.
This is a DANGEROUS SITUATION. These storms have a history of
producing strong winds. SEEK SHELTER NOW inside a sturdy structure
and stay away from windows.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3886 7626 3879 7620 3879 7619 3897 7625
3884 7637 3885 7638 3894 7636 3904 7631
3898 7628 3900 7617 3915 7628 3924 7623
3948 7581 3874 7575 3857 7604 3876 7622
3877 7631 3867 7634 3868 7634 3876 7638
TIME...MOT...LOC 1317Z 219DEG 40KT 3889 7639 3847 7625
TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
$$
AMCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 10:00 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's | 45 min |
| May 5, 11:14 AM EDT | Areal Flood Advisory | PHI | Cecil | 4 hr |
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.