Alert archive / Maryland / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 113, NWS Baltimore/Washington

June 10, 2021Baltimore County, City of Baltimore, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 10, 2021, 2:57 PM EDT for Baltimore County, City of Baltimore, Maryland. It was in force for 25 min. 2 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: Jun 10, 2021, 2:57 PM EDT (18:57 UTC)
Expired: Jun 10, 2021, 3:22 PM EDT
In force: 25 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Baltimore County, MD, City of Baltimore, MD

The radar

The Sterling radar (KLWX), 104 km from the middle of the area, began a volume at 18:59 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
Jun 10, 3:12 PM EDT	TSTM WND DMG	2 Ene Timonium, MD	TREES DOWN ON MD-146 DULANEY VALLEY ROAD NEAR EAST TIMONIUM ROAD.
Jun 10, 3:12 PM EDT	TSTM WND DMG	2 Se Long Green, MD	TREES AND WIRES BLEW DOWN NEAR THE INTERSECTION OF GLEN ARM ROAD AND HOOPER LANE.

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, 7.0 hours before the alert went out and 100 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: 163 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 987 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

867 
WUUS51 KLWX 101857
SVRLWX
MDC005-510-101945-
/O.NEW.KLWX.SV.W.0113.210610T1857Z-210610T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
257 PM EDT Thu Jun 10 2021

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  Northeastern Baltimore City in northern Maryland...
  East central Baltimore County in northern Maryland...

* Until 345 PM EDT.

* At 257 PM EDT, a severe thunderstorm was located over Carney, or
  near Middle River, and is nearly stationary.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damaging winds will cause some trees and large branches 
           to fall. This could injure those outdoors, as well as 
           damage homes and vehicles. Roadways may become blocked by 
           downed trees. Localized power outages are possible. 
           Unsecured light objects may become projectiles.

* Locations impacted include...
  Baltimore, Cockeysville, Towson, Parkville, Carney, Perry Hall,
  Rosedale, Rossville, Mays Chapel, Timonium, White Marsh, Fallston,
  Hampton, Kingsville, Lutherville-Timonium, Joppatowne, Lutherville,
  Nottingham, Glen Arm and Fork.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3952 7647 3951 7646 3951 7643 3949 7643
      3946 7639 3944 7638 3943 7638 3939 7636
      3940 7635 3938 7632 3933 7663 3947 7665
      3953 7652
TIME...MOT...LOC 1857Z 257DEG 1KT 3942 7650 

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

DHOF

2 follow-up statements

463 
WWUS51 KLWX 101909 RRA
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
309 PM EDT Thu Jun 10 2021

MDC005-510-101945-
/O.CON.KLWX.SV.W.0113.000000T0000Z-210610T1945Z/
Baltimore City MD-Baltimore MD-
309 PM EDT Thu Jun 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR CENTRAL BALTIMORE COUNTY AND NORTHEASTERN BALTIMORE CITY...

At 309 PM EDT, a severe thunderstorm was located over Perry Hall, or
near Middle River, and is nearly stationary.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damaging winds will cause some trees and large branches to 
         fall. This could injure those outdoors, as well as damage 
         homes and vehicles. Roadways may become blocked by downed 
         trees. Localized power outages are possible. Unsecured 
         light objects may become projectiles.

Locations impacted include...
Baltimore, Cockeysville, Towson, Parkville, Carney, Perry Hall,
Rosedale, Rossville, Mays Chapel, Timonium, White Marsh, Hampton,
Kingsville, Lutherville-Timonium, Lutherville, Nottingham, Glen Arm,
Fullerton, Baldwin and Long Green.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3952 7647 3937 7641 3933 7663 3947 7665
TIME...MOT...LOC 1909Z 257DEG 1KT 3942 7650 

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

DHOF

059 
WWUS51 KLWX 101922
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
322 PM EDT Thu Jun 10 2021

MDC005-510-101932-
/O.CAN.KLWX.SV.W.0113.000000T0000Z-210610T1945Z/
Baltimore City MD-Baltimore MD-
322 PM EDT Thu Jun 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BALTIMORE COUNTY AND
NORTHEASTERN BALTIMORE CITY IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Sterling Virginia.

LAT...LON 3952 7647 3937 7641 3933 7663 3947 7665
TIME...MOT...LOC 1920Z 257DEG 1KT 3942 7650 

$$

DHOF

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 9, 9:10 PM EDT	Areal Flood Warning	LWX	Saint Mary's	4 hr
Jun 10, 2:53 AM EDT	Flash Flood Watch	LWX	Allegany, Anne Arundel, Baltimore, Calvert, Carroll, Charles and 8 more	43 hr
Jun 10, 5:10 AM EDT	Areal Flood Warning	LWX	Saint Mary's	47 min
Jun 10, 2:59 PM EDT	Areal Flood Warning	LWX	Baltimore	38 min
Jun 10, 2:59 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	46 min
Jun 10, 3:03 PM EDT	Areal Flood Warning	LWX	Carroll	8 hr
Jun 10, 3:37 PM EDT	Flash Flood Warning Considerable damage threat	LWX	Baltimore, City of Baltimore	2 hr
Jun 10, 3:52 PM EDT	Areal Flood Warning	LWX	Anne Arundel, Prince George's	17 hr
Jun 10, 4:50 PM EDT	Areal Flood Warning	LWX	Baltimore, City of Baltimore	5 hr
Jun 10, 4:52 PM EDT	Flash Flood Warning Considerable damage threat	LWX	Charles, Prince George's	93 min
Jun 10, 6:03 PM EDT	Areal Flood Warning	LWX	Baltimore, City of Baltimore	2 hr
Jun 10, 6:25 PM EDT	Areal Flood Warning	LWX	Charles, Prince George's	2 hr

Nearby

Severe Thunderstorm Warnings in Maryland, 2021 Every severe thunderstorm warning in 2021

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.