Alert archive / Maryland / Tornado Warnings in 2020
Tornado Warning 13, NWS Baltimore/Washington
NWS Baltimore/Washington issued this tornado warning at Aug 4, 2020, 7:17 AM EDT for Anne Arundel County, Calvert County, Maryland. It was in force for 28 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
- Aug 4, 2020, 7:17 AM EDT (11:17 UTC)
- Expired
- Aug 4, 2020, 7:45 AM EDT
- In force
- 28 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Anne Arundel County, MD, Calvert County, MD
The radar
The Sterling radar (KLWX), 88 km from the middle of the area, began a volume at 11:22 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 |
|---|---|---|---|
| Aug 4, 7:35 AM EDT | TORNADO | 4 S Chesapeake Beach, MD | MULTIPLE TREES REPORTED DOWN IN THE WILLOW BEACH COLONY AREA. |
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 |
|---|---|---|---|
| Aug 4, 2:26 AM EDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 11.3 hours before the alert went out and 79 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.
- Mixed-layer CAPE
- 89 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 889 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
078
WFUS51 KLWX 041117
TORLWX
MDC003-009-041145-
/O.NEW.KLWX.TO.W.0013.200804T1117Z-200804T1145Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Baltimore MD/Washington DC
717 AM EDT Tue Aug 4 2020
The National Weather Service in Sterling Virginia has issued a
* Tornado Warning for...
South central Anne Arundel County in central Maryland...
Northwestern Calvert County in southern Maryland...
* Until 745 AM EDT.
* At 715 AM EDT, a severe thunderstorm capable of producing a
tornado was located over the Chesapeake Bay east of St. Leonard,
moving northwest at 45 mph. This tornado is expected to move
onshore near Dares Beach around 720 AM EDT.
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...
Chesapeake Beach, Breezy Point, Dunkirk, Huntingtown, Owings,
Friendship, Mount Harmony, Tracys Landing, Sunderland and Dares
Beach.
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 3862 7666 3882 7667 3874 7652 3873 7651
3870 7651 3853 7649 3851 7648
TIME...MOT...LOC 1115Z 132DEG 38KT 3851 7643
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
LEE1 follow-up statement
096
WWUS51 KLWX 041134
SVSLWX
Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
734 AM EDT Tue Aug 4 2020
MDC003-009-041145-
/O.CON.KLWX.TO.W.0013.000000T0000Z-200804T1145Z/
Anne Arundel MD-Calvert MD-
734 AM EDT Tue Aug 4 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 AM EDT FOR SOUTHERN
ANNE ARUNDEL AND NORTHWESTERN CALVERT COUNTIES...
At 734 AM EDT, a severe thunderstorm capable of producing a tornado
was coming ashore between Chesapeake Beach and Dares Beach, moving
west at 50 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...For those in the direct path of a tornado touchdown, flying
debris will be dangerous to those caught without shelter.
Damage to roofs, siding, and windows may occur. Mobile
homes may be damaged or destroyed. Tree damage is likely.
Locations impacted include...
Chesapeake Beach, Breezy Point, Dunkirk, Huntingtown, Owings,
Friendship, Mount Harmony and Sunderland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
&&
LAT...LON 3860 7660 3862 7666 3875 7666 3870 7651
3858 7652
TIME...MOT...LOC 1134Z 105DEG 45KT 3863 7654
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
LEEThe office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 4:01 AM EDT | Tornado Warning | LWX | Saint Mary's | 29 min |
| Aug 4, 4:47 AM EDT | Tornado Warning | LWX | Charles, Saint Mary's | 28 min |
| Aug 4, 5:17 AM EDT | Areal Flood Warning | LWX | Saint Mary's | 6 hr |
| Aug 4, 6:18 AM EDT | Tornado Warning | LWX | Charles, Saint Mary's | 13 min |
| Aug 4, 6:41 AM EDT | Tornado Warning | LWX | Saint Mary's | 34 min |
| Aug 4, 6:44 AM EDT | Tornado Warning | LWX | Calvert, Saint Mary's | 31 min |
| Aug 4, 6:57 AM EDT | Flash Flood Warning | LWX | Calvert, Saint Mary's | 4 hr |
| Aug 4, 7:32 AM EDT | Flash Flood Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 4 hr |
| Aug 4, 7:42 AM EDT | Tornado Warning | LWX | Calvert, Prince George's | 8 min |
| Aug 4, 8:31 AM EDT | Areal Flood Warning | LWX | Montgomery, Prince George's | 9 hr |
| Aug 4, 8:39 AM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, Prince George's, City of Baltimore | 4 hr |
| Aug 4, 9:02 AM EDT | Flash Flood Warning | LWX | Baltimore, Harford | 4 hr |
| Aug 4, 9:26 AM EDT | Tornado Warning | LWX | Harford | 18 min |
| Aug 4, 9:31 AM EDT | Tornado Warning | LWX | Baltimore | 11 min |
| Aug 4, 9:53 AM EDT | Areal Flood Warning | LWX | Baltimore, Carroll, Howard | 6 hr |
| Aug 4, 10:47 AM EDT | Areal Flood Warning | LWX | Calvert, Saint Mary's | 17 hr |
| Aug 4, 11:20 AM EDT | Areal Flood Warning | LWX | Anne Arundel, Calvert, Charles, Prince George's | 21 hr |
| Aug 4, 12:32 PM EDT | Areal Flood Warning | LWX | Anne Arundel, Baltimore, Prince George's, City of Baltimore | 11 hr |
| Aug 4, 12:53 PM EDT | Areal Flood Warning | LWX | Baltimore, Harford | 4 hr |
| Aug 4, 4:32 PM EDT | Areal Flood Warning | LWX | Charles | 43 hr |
| Aug 4, 7:18 PM EDT | Areal Flood Warning | LWX | Charles | 24 hr |
Nearby
Tornado Warnings in Maryland, 2020Every tornado warning in 2020Tornadoes in 2020
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.