Alert archive / Maryland / Tornado Warnings in 2021

Tornado Warning 40, NWS Baltimore/Washington

September 1, 2021Anne Arundel County, Prince George's County, Maryland

NWS Baltimore/Washington issued this tornado warning at Sep 1, 2021, 1:56 PM EDT for Anne Arundel County, Prince George's County, Maryland. It was in force for 34 min. 1 report 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
Sep 1, 2021, 1:56 PM EDT (17:56 UTC)
Expired
Sep 1, 2021, 2:30 PM EDT
In force
34 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Anne Arundel County, MD, Prince George's County, MD

The radar

The Sterling radar (KLWX), 83 km from the middle of the area, began a volume at 17:59 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

TimeReportWhereRemark
Sep 1, 2:00 PM EDTTORNADO3 W Galesville, MDEF-2 WITH ESTIMATED PEAK WINDS OF 125 MPH PATH LENGTH: 11.25 MILES MAX WIDTH: 200 YARDS

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.

IssuedProductOfficeLasted
Sep 1, 11:46 AM EDTTornado WatchSPC9 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.9 hours before the alert went out and 75 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-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2021-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 558 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2021-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
558 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
575 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
223 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.6

Open this sounding in Storm Lab

The text

As transmitted.

927 
WFUS51 KLWX 011756
TORLWX
MDC003-033-011830-
/O.NEW.KLWX.TO.W.0040.210901T1756Z-210901T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Baltimore MD/Washington DC
156 PM EDT Wed Sep 1 2021

The National Weather Service in Sterling Virginia has issued a

* Tornado Warning for...
  Central Anne Arundel County in central Maryland...
  East central Prince Georges County in central Maryland...

* Until 230 PM EDT.
    
* At 156 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Upper Marlboro, moving northeast at 35 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...
  Annapolis, Mayo, Naval Academy, Severn River, South River, Rhode
  River, Severna Park, Arnold, Parole, Londontowne, Edgewater, Riva,
  Herald Harbor, Crownsville, Galesville, Highland Beach, Lothian,
  Davidsonville, Navy-Marine Corps Stadium and Eastport.

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 or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 3896 7645 3891 7646 3877 7663 3880 7672
      3911 7661 3899 7640
TIME...MOT...LOC 1756Z 210DEG 32KT 3883 7665 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

LEE
2 follow-up statements
119 
WWUS51 KLWX 011810
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
210 PM EDT Wed Sep 1 2021

MDC033-011820-
/O.CAN.KLWX.TO.W.0040.000000T0000Z-210901T1830Z/
Prince Georges MD-
210 PM EDT Wed Sep 1 2021

...THE TORNADO WARNING FOR EAST CENTRAL PRINCE GEORGES 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 700 PM EDT for central
Maryland.

LAT...LON 3896 7645 3891 7646 3886 7657 3890 7665
      3909 7659 3899 7640
TIME...MOT...LOC 1810Z 210DEG 32KT 3894 7657 

$$

MDC003-011830-
/O.CON.KLWX.TO.W.0040.000000T0000Z-210901T1830Z/
Anne Arundel MD-
210 PM EDT Wed Sep 1 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 230 PM EDT FOR CENTRAL
ANNE ARUNDEL COUNTY...
    
At 210 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Londontowne, or near Mayo, moving northeast at 35
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...
Annapolis, Mayo, Naval Academy, Severn River, South River, Severna
Park, Arnold, Parole, Londontowne, Edgewater, Riva, Herald Harbor,
Crownsville, Highland Beach, Hillsmere Shores, Sherwood Forest,
Davidsonville, Navy-Marine Corps Stadium, Eastport and Bay Ridge.

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 or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 3896 7645 3891 7646 3886 7657 3890 7665
      3909 7659 3899 7640
TIME...MOT...LOC 1810Z 210DEG 32KT 3894 7657 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

LEE
318 
WWUS51 KLWX 011815
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
215 PM EDT Wed Sep 1 2021

MDC003-011830-
/O.CON.KLWX.TO.W.0040.000000T0000Z-210901T1830Z/
Anne Arundel MD-
215 PM EDT Wed Sep 1 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 230 PM EDT FOR EAST
CENTRAL ANNE ARUNDEL COUNTY...
        
At 214 PM EDT, a confirmed tornado was located over Londowntowne, or 
over Annapolis, moving northeast at 35 mph.

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

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 tornado will be near...
  Parole at 215 PM EDT.
  Severn River around 220 PM EDT.
  Arnold around 230 PM EDT.

Other locations impacted by this tornadic thunderstorm include
Sherwood Forest, Riva, Edgewater, Navy-Marine Corps Stadium,
Eastport, Edgewater Beach, Crownsville and Herald Harbor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should not take shelter under highway overpasses. If you
cannot safely drive away from the tornado, as a last resort, either
park your vehicle and stay put, or abandon your vehicle and lie down
in a low lying area and protect yourself from flying debris.

&&

LAT...LON 3897 7647 3893 7651 3890 7655 3893 7661
      3905 7658 3901 7645
TIME...MOT...LOC 1814Z 210DEG 32KT 3897 7655 

TORNADO...OBSERVED
MAX HAIL SIZE...0.00 IN

$$

LEE

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 9:06 PM EDTCoastal Flood WatchLWXAnne Arundel22 hr
Aug 31, 9:36 PM EDTRiver Flood WarningLWXWashington68 hr
Aug 31, 9:44 PM EDTRiver Flood WatchLWXFrederick25 hr
Aug 31, 9:44 PM EDTRiver Flood WatchLWXMontgomery48 hr
Aug 31, 9:44 PM EDTRiver Flood WatchLWXWashington25 hr
Aug 31, 9:44 PM EDTRiver Flood WatchLWXMontgomery25 hr
Sep 1, 3:23 AM EDTAreal Flood WarningLWXMontgomery8 hr
Sep 1, 3:24 AM EDTSevere Thunderstorm WarningLWXMontgomery, Prince George's51 min
Sep 1, 3:50 AM EDTAreal Flood WarningLWXMontgomery, Prince George's6 hr
Sep 1, 4:00 AM EDTSevere Thunderstorm WarningLWXAnne Arundel, Prince George's60 min
Sep 1, 4:10 AM EDTAreal Flood WarningLWXAnne Arundel, Baltimore, Howard, City of Baltimore6 hr
Sep 1, 4:34 AM EDTAreal Flood WarningLWXMontgomery6 hr
Sep 1, 4:39 AM EDTAreal Flood WarningLWXAnne Arundel, Baltimore, Howard, City of Baltimore5 hr
Sep 1, 4:50 AM EDTSevere Thunderstorm WarningLWXAnne Arundel, Baltimore, City of Baltimore40 min
Sep 1, 5:41 AM EDTAreal Flood WarningLWXCecil, Harford5 hr
Sep 1, 6:15 AM EDTAreal Flood WarningLWXCecil5 hr
Sep 1, 8:39 AM EDTFlash Flood WarningLWXAllegany, Garrett5 hr
Sep 1, 10:14 AM EDTCoastal Flood AdvisoryLWXAnne Arundel, Baltimore, Calvert, Cecil, Harford, Saint Mary's and 1 more19 hr
Sep 1, 12:52 PM EDTAreal Flood WarningLWXAllegany22 hr
Sep 1, 1:11 PM EDTTornado WarningLWXCharles, Prince George's34 min
Sep 1, 1:23 PM EDTTornado WarningLWXCharles17 min
Sep 1, 1:30 PM EDTAreal Flood WarningLWXCarroll, Frederick, Washington27 hr
Sep 1, 1:31 PM EDTTornado WarningLWXCharles, Saint Mary's29 min
Sep 1, 1:46 PM EDTAreal Flood WarningLWXAllegany, Garrett16 hr
Sep 1, 2:12 PM EDTTornado WarningLWXBaltimore33 min
Sep 1, 2:23 PM EDTTornado WarningLWXBaltimore15 min
Sep 1, 2:26 PM EDTFlash Flood Warning Considerable damage threatLWXCarroll, Frederick6 hr
Sep 1, 2:26 PM EDTTornado WarningLWXBaltimore, Harford14 min
Sep 1, 2:27 PM EDTTornado Warning Tornado observedLWXAnne Arundel15 min
Sep 1, 2:48 PM EDTTornado Warning Tornado observedLWXBaltimore, Harford27 min
Sep 1, 3:10 PM EDTTornado WarningLWXBaltimore16 min
Sep 1, 3:17 PM EDTTornado WarningLWXHarford28 min
Sep 1, 3:25 PM EDTFlash Flood Warning Considerable damage threatLWXCarroll, Frederick5 hr
Sep 1, 3:34 PM EDTFlash Flood Warning Considerable damage threatLWXCecil, Harford3 hr
Sep 1, 3:36 PM EDTWind AdvisoryLWXAllegany, Carroll, Frederick, Washington7 hr
Sep 1, 3:49 PM EDTTornado WarningLWXCecil, Harford26 min
Sep 1, 4:13 PM EDTRiver Flood WatchLWXCecil7 hr
Sep 1, 4:13 PM EDTRiver Flood WarningLWXAllegany7 hr
Sep 1, 4:14 PM EDTRiver Flood WarningLWXAllegany9 hr
Sep 1, 4:37 PM EDTAreal Flood WarningLWXBaltimore, Carroll, Harford13 hr
Sep 1, 5:46 PM EDTTornado WarningLWXCecil29 min
Sep 1, 6:08 PM EDTAreal Flood WarningLWXCecil, Harford17 hr
Sep 1, 6:12 PM EDTTornado WarningLWXCecil19 min
Sep 1, 7:03 PM EDTCoastal Flood WarningLWXAnne Arundel8 hr
Sep 1, 7:27 PM EDTAreal Flood WarningLWXAllegany, Washington15 hr
Sep 1, 7:59 PM EDTAreal Flood WarningLWXCarroll, Frederick2 hr

Nearby

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