Alert archive / Maryland / Tornado Warnings in 2021

Tornado Warning 22, NWS Baltimore/Washington

July 29, 2021Anne Arundel County, Baltimore County, Howard County, Maryland

NWS Baltimore/Washington issued this tornado warning at Jul 29, 2021, 4:59 PM EDT for Anne Arundel County, Baltimore County, Howard County, Maryland. It was in force for 31 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: Jul 29, 2021, 4:59 PM EDT (20:59 UTC)
Expired: Jul 29, 2021, 5:30 PM EDT
In force: 31 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Anne Arundel County, MD, Baltimore County, MD, Howard County, MD

The radar

The Sterling radar (KLWX), 74 km from the middle of the area, began a volume at 20:59 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
Jul 29, 4:59 PM EDT	TSTM WND DMG	1 Nnw Columbia, MD	A TREE BLEW DOWN NEAR THE INTERSECTION OF GREEN MOUNTAIN CIRCLE AND PAINTED CUP. A TREE BLEW DOWN NEAR THE INTERSECTION OF GOVERNOR WARFIELD PARKWAY AND LITTLE PATUXENT PARKWAY.
Jul 29, 5:07 PM EDT	TORNADO	2 Se Columbia, MD	EF0. PEAK WINDS 70MPH. PATH LENGTH 0.3 MILES. PATH WIDTH 50 YARDS.
Jul 29, 5:18 PM EDT	TSTM WND DMG	1 Sse Baltmore-Washingt, MD	A FEW TREE REPORTED DOWN ALONG WITH HEAVY METAL BARRELS FLIPPED OVER NEAR DORSEY ROAD AND ARUNDEL AVE.
Jul 29, 5:21 PM EDT	TSTM WND GST 62	Bwi Marshall Airport, MD	54 KNOT WIND GUST AT BWI ASOS

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 29, 2:23 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.0 hours before the alert went out and 69 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: 269 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 893 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

084 
WFUS51 KLWX 292059
TORLWX
MDC003-005-027-292130-
/O.NEW.KLWX.TO.W.0022.210729T2059Z-210729T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Baltimore MD/Washington DC
459 PM EDT Thu Jul 29 2021

The National Weather Service in Sterling Virginia has issued a

* Tornado Warning for...
  Northwestern Anne Arundel County in central Maryland...
  East central Howard County in central Maryland...
  South central Baltimore County in northern Maryland...

* Until 530 PM EDT.
    
* At 459 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Columbia, moving east at 25 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...For those in the direct path of a tornado touchdown, 
           flying debris will be dangerous to those caught without 
           shelter. Damage to roofs, siding, and windows may occur. 
           Mobile homes may be damaged or destroyed. Tree damage is 
           likely.

* This dangerous storm will be near...
  Catonsville around 505 PM EDT.
  Severn, Elkridge and Arbutus around 515 PM EDT.
  Baltimore-Washington Airport and Pumphrey around 520 PM EDT.
  Ferndale, Brooklyn Park, Brooklyn Park and South Gate around 525 
  PM EDT.
  Glen Burnie and Severna Park around 530 PM EDT.

Other locations impacted by this tornadic thunderstorm include
Hanover, Linthicum, Harmans, Ilchester, Halethorpe, Lansdowne,
Linthicum Heights, Gambrills and Jessup.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3923 7661 3921 7659 3922 7658 3908 7661
      3921 7689 3927 7686
TIME...MOT...LOC 2059Z 284DEG 23KT 3923 7683 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

DHOF

3 follow-up statements

044 
WWUS51 KLWX 292110
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
510 PM EDT Thu Jul 29 2021

MDC005-292120-
/O.CAN.KLWX.TO.W.0022.000000T0000Z-210729T2130Z/
Baltimore MD-
510 PM EDT Thu Jul 29 2021

...THE TORNADO WARNING FOR SOUTH CENTRAL BALTIMORE COUNTY IS
CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 900 PM EDT for central and
northern Maryland.

LAT...LON 3921 7659 3908 7661 3919 7684 3922 7681
TIME...MOT...LOC 2110Z 284DEG 23KT 3921 7674 

$$

MDC003-027-292130-
/O.CON.KLWX.TO.W.0022.000000T0000Z-210729T2130Z/
Anne Arundel MD-Howard MD-
510 PM EDT Thu Jul 29 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR
NORTHWESTERN ANNE ARUNDEL AND EAST CENTRAL HOWARD COUNTIES...
    
At 510 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Elkridge, moving east at 25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...For those in the direct path of a tornado touchdown, flying 
         debris will be dangerous to those caught without shelter. 
         Damage to roofs, siding, and windows may occur. Mobile 
         homes may be damaged or destroyed. Tree damage is likely.

This dangerous storm will be near...
  Severn around 515 PM EDT.
  Baltimore-Washington Airport around 520 PM EDT.
  Ferndale, Brooklyn Park and South Gate around 525 PM EDT.
  Glen Burnie and Severna Park around 530 PM EDT.

Other locations impacted by this tornadic thunderstorm include
Hanover, Linthicum, Harmans, Linthicum Heights, Ilchester, Gambrills
and Jessup.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3921 7659 3908 7661 3919 7684 3922 7681
TIME...MOT...LOC 2110Z 284DEG 23KT 3921 7674 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

DHOF

916 
WWUS51 KLWX 292119
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
519 PM EDT Thu Jul 29 2021

MDC027-292129-
/O.CAN.KLWX.TO.W.0022.000000T0000Z-210729T2130Z/
Howard MD-
519 PM EDT Thu Jul 29 2021

...THE TORNADO WARNING FOR EAST CENTRAL HOWARD COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 900 PM EDT for central
Maryland.

LAT...LON 3921 7659 3908 7661 3916 7677 3918 7675
      3918 7672 3919 7672 3921 7670
TIME...MOT...LOC 2119Z 284DEG 23KT 3920 7667 

$$

MDC003-292130-
/O.CON.KLWX.TO.W.0022.000000T0000Z-210729T2130Z/
Anne Arundel MD-
519 PM EDT Thu Jul 29 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR
NORTHWESTERN ANNE ARUNDEL COUNTY...
    
At 519 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Baltimore-Washington Airport, moving east at 25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...For those in the direct path of a tornado touchdown, flying 
         debris will be dangerous to those caught without shelter. 
         Damage to roofs, siding, and windows may occur. Mobile 
         homes may be damaged or destroyed. Tree damage is likely.

This dangerous storm will be near...
  Glen Burnie and Severna Park around 530 PM EDT.

Other locations impacted by this tornadic thunderstorm include
Linthicum, Harmans, Linthicum Heights, Gambrills and Jessup.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3921 7659 3908 7661 3916 7677 3918 7675
      3918 7672 3919 7672 3921 7670
TIME...MOT...LOC 2119Z 284DEG 23KT 3920 7667 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

DHOF

991 
WWUS51 KLWX 292127
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
527 PM EDT Thu Jul 29 2021

MDC003-292137-
/O.EXP.KLWX.TO.W.0022.000000T0000Z-210729T2130Z/
Anne Arundel MD-
527 PM EDT Thu Jul 29 2021

...THE TORNADO WARNING FOR NORTHWESTERN ANNE ARUNDEL COUNTY WILL
EXPIRE AT 530 PM EDT...
        
The rotation with the storm which prompted the warning has weakened, 
and has exited the warned area. Therefore, the warning will be 
allowed to expire.

A Tornado Watch remains in effect until 900 PM EDT for central
Maryland.

LAT...LON 3921 7659 3908 7661 3916 7677 3918 7675
      3918 7672 3919 7672 3921 7670
TIME...MOT...LOC 2127Z 284DEG 23KT 3919 7662 

$$

DHOF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 9:30 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	45 min
Jul 28, 9:48 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	42 min
Jul 29, 3:31 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	44 min
Jul 29, 4:00 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll	45 min
Jul 29, 4:01 PM EDT	Tornado Warning	LWX	Carroll	29 min
Jul 29, 4:16 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Howard	44 min
Jul 29, 4:34 PM EDT	Tornado Warning	LWX	Howard	26 min
Jul 29, 4:40 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	50 min
Jul 29, 4:50 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Howard, City of Baltimore	55 min
Jul 29, 4:59 PM EDT	Severe Thunderstorm Warning	LWX	Charles	46 min
Jul 29, 5:01 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery, Prince George's	29 min
Jul 29, 5:30 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Prince George's	40 min
Jul 29, 5:43 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel	17 min
Jul 29, 6:49 PM EDT	Coastal Flood Advisory	LWX	Anne Arundel	4 hr

Nearby

Tornado Warnings in Maryland, 2021 Every tornado warning in 2021 Tornadoes 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.