Alert archive / Maryland / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 404, NWS Philadelphia/Mount Holly

October 31, 20195 counties in Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 31, 2019, 10:47 PM EDT for 5 counties in Maryland. It was in force for 73 min. 4 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: Oct 31, 2019, 10:47 PM EDT (02:47 UTC)
Expired: Nov 1, 2019, 12:00 AM EDT
In force: 73 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), 66 km from the middle of the area, began a volume at 02:49 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
Oct 31, 11:11 PM EDT	TSTM WND DMG	4 Wsw Chester, MD	DOWNED UTILITY NEAR THE INTERSECTION OF STATE HIGHWAY 802 AND ROMANCOKE ROAD. TIME ESTIMATED FROM RADAR.
Oct 31, 11:11 PM EDT	TSTM WND DMG	4 Wsw Chester, MD	DOWNED UTILITY NEAR THE INTERSECTION OF STATE HIGHWAY 802 AND ROMANCOKE ROAD. TIME ESTIMATED FROM RADAR.
Oct 31, 11:47 PM EDT	TSTM WND DMG	Easton, MD	SEVERAL REPORTS OF DOWNED TREES IN THE AREA. TIME ESTIMATED FROM RADAR.
Oct 31, 11:54 PM EDT	TSTM WND DMG	2 S Greensboro, MD	DOWNED POWER LINES NEAR THE INTERSECTION OF SPRING BRANCH ROAD AND GREENSBORO ROAD. TIME ESTIMATED FROM RADAR.

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
Oct 31, 7:56 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 2.8 hours before the alert went out and 108 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 529 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 827 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 623 m²/s²
0-3 km storm-relative helicity: 752 m²/s²
Significant tornado parameter: 2.5
Supercell composite: 9.8

Open this sounding in Storm Lab

The text

As transmitted.

247 
WUUS51 KPHI 010247
SVRPHI
MDC011-015-029-035-041-010400-
/O.NEW.KPHI.SV.W.0404.191101T0247Z-191101T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1047 PM EDT Thu Oct 31 2019

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 midnight EDT.

* At 1047 PM EDT, severe thunderstorms were located along a line
  extending from near Aberdeen to near Waldorf, moving northeast at
  65 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Easton, Centerville, Talbot, Chestertown, Denton, Centreville,
  Romancoke, Federalsburg, Greensboro, Oakland, Ridgely, Rock Hall,
  Trappe, St. Michaels, Church Hill, Preston, Cecilton, Oxford,
  Millington and Sudlersville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.

&&

LAT...LON 3897 7625 3884 7637 3885 7638 3894 7636
      3904 7631 3900 7617 3917 7628 3942 7600
      3955 7602 3955 7603 3957 7609 3954 7578
      3864 7571 3870 7590 3857 7604 3877 7631
      3867 7634 3876 7638
TIME...MOT...LOC 0247Z 236DEG 55KT 3949 7616 3868 7690 

HAIL...<.75IN
WIND...60MPH
 
$$

Iovino

1 follow-up statement

049 
WWUS51 KPHI 010339
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1139 PM EDT Thu Oct 31 2019

MDC015-010348-
/O.CAN.KPHI.SV.W.0404.000000T0000Z-191101T0400Z/
Cecil MD-
1139 PM EDT Thu Oct 31 2019

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CECIL COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 3885 7627 3890 7629 3879 7620 3883 7619
      3894 7625 3900 7617 3936 7591 3938 7577
      3865 7571 3870 7590 3857 7604 3872 7624
      3876 7622 3873 7626 3878 7629 3867 7634
      3875 7637
TIME...MOT...LOC 0338Z 254DEG 30KT 3953 7570 3909 7610 

$$

MDC011-029-035-041-010400-
/O.CON.KPHI.SV.W.0404.000000T0000Z-191101T0400Z/
Talbot MD-Queen Anne's MD-Caroline MD-Kent MD-
1139 PM EDT Thu Oct 31 2019

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT
FOR TALBOT...QUEEN ANNE'S...CAROLINE AND NORTHEASTERN KENT
COUNTIES...

At 1138 PM EDT, severe thunderstorms were located along a line
extending from Mount Pleasant to near Old Town, moving east at 35
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Easton, Centerville, Talbot, Denton, Centreville, Federalsburg,
Greensboro, Oakland, Ridgely, Trappe, St. Michaels, Church Hill,
Preston, Oxford, Millington, Sudlersville, Goldsboro, Queen Anne,
Smithville and Grasonville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This severe thunderstorm may contain little or no lightning. Do not
wait until you hear thunder before taking cover.

&&

LAT...LON 3885 7627 3890 7629 3879 7620 3883 7619
      3894 7625 3900 7617 3936 7591 3938 7577
      3865 7571 3870 7590 3857 7604 3872 7624
      3876 7622 3873 7626 3878 7629 3867 7634
      3875 7637
TIME...MOT...LOC 0338Z 254DEG 30KT 3953 7570 3909 7610 

HAIL...<.75IN
WIND...60MPH
 
$$

Iovino

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 31, 9:35 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	55 min
Oct 31, 10:23 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	67 min
Oct 31, 11:10 PM EDT	Tornado Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	35 min
Nov 1, 3:31 AM EDT	Freeze Watch	PHI	Cecil	6 hr
Nov 1, 9:12 AM EDT	Freeze Warning	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	25 hr

Nearby

Severe Thunderstorm Warnings in Maryland, 2019 Every severe thunderstorm warning in 2019

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.