Alert archive / Maryland / Tornado Warnings in 2021

Tornado Warning 19, NWS Baltimore/Washington

July 8, 2021Calvert County, Saint Mary's County, Maryland

NWS Baltimore/Washington issued this tornado warning at Jul 8, 2021, 11:13 PM EDT for Calvert County, Saint Mary's County, Maryland. It was in force for 17 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 8, 2021, 11:13 PM EDT (03:13 UTC)
Expired: Jul 8, 2021, 11:30 PM EDT
In force: 17 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Calvert County, MD, Saint Mary's County, MD

The radar

The Dover AFB radar (KDOX), 105 km from the middle of the area, began a volume at 03:15 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.

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 8, 1:50 PM EDT	Tornado Watch	SPC	11 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 3.2 hours before the alert went out and 96 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: 440 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 675 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 336 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

As transmitted.

432 
WFUS51 KLWX 090313
TORLWX
MDC009-037-090345-
/O.NEW.KLWX.TO.W.0019.210709T0313Z-210709T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Baltimore MD/Washington DC
1113 PM EDT Thu Jul 8 2021

The National Weather Service in Sterling Virginia has issued a

* Tornado Warning for...
  East central St. Marys County in southern Maryland...
  Southern Calvert County in southern Maryland...

* Until 1145 PM EDT.
    
* At 1112 PM EDT, a severe thunderstorm capable of producing a
  tornado was located near Patuxent River Naval Air Station, or near
  Lexington Park, moving northwest at 30 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.

* Locations impacted include...
  Lexington Park, Cuckold Creek, Town Creek, California, Lusby,
  Patuxent River Naval Air Station, Drum Point and Park Hall.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 3826 7638 3825 7638 3823 7636 3819 7639
      3828 7654 3835 7647 3829 7636
TIME...MOT...LOC 0312Z 126DEG 24KT 3824 7634 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

LEE

1 follow-up statement

956 
WWUS51 KLWX 090330
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
1130 PM EDT Thu Jul 8 2021

MDC009-037-090339-
/O.CAN.KLWX.TO.W.0019.000000T0000Z-210709T0345Z/
St. Marys MD-Calvert MD-
1130 PM EDT Thu Jul 8 2021

...THE TORNADO WARNING FOR EAST CENTRAL ST. MARYS AND SOUTHERN
CALVERT COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.


LAT...LON 3826 7638 3825 7638 3823 7636 3819 7639
      3828 7654 3835 7647 3829 7636
TIME...MOT...LOC 0328Z 126DEG 24KT 3831 7646 

$$

BJL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 10:31 PM EDT	Tornado Warning	LWX	Saint Mary's	29 min
Jul 8, 11:13 PM EDT	Flash Flood Warning Considerable damage threat	LWX	Saint Mary's	76 min
Jul 9, 12:40 AM EDT	Coastal Flood Warning	LWX	Saint Mary's	2 hr
Jul 9, 12:47 AM EDT	Coastal Flood Advisory	LWX	Charles	2 hr
Jul 9, 4:56 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	49 min
Jul 9, 5:02 PM EDT	Areal Flood Warning	LWX	Prince George's	3 hr
Jul 9, 5:30 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's	45 min
Jul 9, 5:54 PM EDT	Severe Thunderstorm Warning	LWX	Calvert	51 min
Jul 9, 6:03 PM EDT	Severe Thunderstorm Warning	LWX	Cecil, Harford	57 min
Jul 9, 6:17 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	31 min
Jul 9, 6:19 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's, Saint Mary's	41 min
Jul 9, 6:43 PM EDT	Severe Thunderstorm Warning	LWX	Calvert	32 min
Jul 9, 6:55 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick	50 min
Jul 9, 7:05 PM EDT	Areal Flood Warning	LWX	Calvert, Charles, Prince George's	3 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.