Alert archive / Maryland / Tornado Warnings in 2021

Tornado Warning 26, NWS Baltimore/Washington

August 18, 2021Cecil County, Maryland

NWS Baltimore/Washington issued this tornado warning at Aug 18, 2021, 6:31 PM EDT for Cecil County, Maryland. It was in force for 29 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: Aug 18, 2021, 6:31 PM EDT (22:31 UTC)
Expired: Aug 18, 2021, 7:00 PM EDT
In force: 29 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Cecil County, MD

The radar

The Dover AFB radar (KDOX), 90 km from the middle of the area, began a volume at 22:34 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
Aug 18, 11:37 AM EDT	Tornado Watch	SPC	11 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.5 hours before the alert went out and 144 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: 1011 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 592 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

As transmitted.

901 
WFUS51 KLWX 182231
TORLWX
MDC015-182300-
/O.NEW.KLWX.TO.W.0026.210818T2231Z-210818T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Baltimore MD/Washington DC
631 PM EDT Wed Aug 18 2021

The National Weather Service in Sterling Virginia has issued a

* Tornado Warning for...
  Eastern Cecil County in northeastern Maryland...

* Until 700 PM EDT.
    
* At 631 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Hollywood Beach, or 9 miles east of Aberdeen
  Proving Ground, moving northeast at 50 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...
  Hollywood Beach around 635 PM EDT.
  Charlestown around 640 PM EDT.
  North East, Brantwood and Bay View around 645 PM EDT.
  Elkton, Cherry Hill, Barksdale, Andora, Fair Hill, Pleasant Hill, 
  Blake, Lombard and Glasgow around 650 PM EDT.
  Newark, Glen Westover and Appleton around 655 PM EDT.

Other locations impacted by this tornadic thunderstorm include
Chesapeake City.

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 3957 7578 3937 7595 3939 7604 3951 7600
      3952 7601 3972 7595 3972 7579
TIME...MOT...LOC 2231Z 203DEG 45KT 3945 7596 

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

$$

KLW

3 follow-up statements

033 
WWUS51 KLWX 182237
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
637 PM EDT Wed Aug 18 2021

MDC015-182300-
/O.CON.KLWX.TO.W.0026.000000T0000Z-210818T2300Z/
Cecil MD-
637 PM EDT Wed Aug 18 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR
NORTHEASTERN CECIL COUNTY...
    
At 636 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Hollywood Beach, or 8 miles east of Aberdeen Proving
Ground, moving north at 20 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...
  Hollywood Beach around 645 PM EDT.
  Charlestown and Brantwood around 655 PM EDT.
  Elkton and North East around 700 PM EDT.

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 3950 7587 3945 7595 3946 7600 3967 7595
      3964 7579 3958 7578
TIME...MOT...LOC 2236Z 194DEG 20KT 3948 7597 

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

$$

KLW

759 
WWUS51 KLWX 182249
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
649 PM EDT Wed Aug 18 2021

MDC015-182300-
/O.CON.KLWX.TO.W.0026.000000T0000Z-210818T2300Z/
Cecil MD-
649 PM EDT Wed Aug 18 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR
NORTHEASTERN CECIL COUNTY...
    
At 648 PM EDT, a severe thunderstorm capable of producing a tornado
was located over North East, or near Elkton, moving north at 60 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 tornadic thunderstorm will remain over mainly rural areas of
northeastern Cecil County.

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 3955 7586 3950 7591 3952 7597 3967 7595
      3964 7579 3960 7582
TIME...MOT...LOC 2248Z 199DEG 51KT 3958 7592 

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

$$

KLW

830 
WWUS51 KLWX 182259
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
659 PM EDT Wed Aug 18 2021

MDC015-182309-
/O.EXP.KLWX.TO.W.0026.000000T0000Z-210818T2300Z/
Cecil MD-
659 PM EDT Wed Aug 18 2021

...THE TORNADO WARNING FOR NORTHEASTERN CECIL COUNTY WILL EXPIRE AT
700 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A Tornado Watch remains in effect until 800 PM EDT for northeastern
Maryland.

LAT...LON 3955 7586 3950 7591 3952 7597 3967 7595
      3964 7579 3960 7582
TIME...MOT...LOC 2259Z 203DEG 45KT 3971 7585 

$$

KLW

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 3:12 PM EDT	Tornado Warning	LWX	Allegany, Washington	16 min
Aug 18, 4:29 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	14 min
Aug 18, 5:13 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Washington	47 min
Aug 18, 5:26 PM EDT	Tornado Warning	LWX	Frederick, Washington	17 min
Aug 18, 7:01 PM EDT	Coastal Flood Advisory	LWX	Anne Arundel, Baltimore, Harford, City of Baltimore	14 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.