Alert archive / Maryland / Tornado Warnings in 2026
Tornado Warning 40, NWS Baltimore/Washington
NWS Baltimore/Washington issued this tornado warning at Aug 10, 2026, 4:14 PM EDT for 4 counties in Maryland. It was in force for 18 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 10, 2026, 4:14 PM EDT (20:14 UTC)
- Expired
- Aug 10, 2026, 4:32 PM EDT
- In force
- 18 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Baltimore County, MD, Carroll County, MD, City of Baltimore, MD, Howard County, MD
The radar
The Sterling radar (KLWX), 75 km from the middle of the area, began a volume at 20:17 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 10, 1:13 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.2 hours before the alert went out and 71 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
- 682 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 1254 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -34 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.6
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Baltimore/Washington wrote its last area forecast discussion before this tornado warning went out at Aug 10, 3:43 PM EDT, 31 minutes earlier.
Area forecast discussion, Aug 10, 3:43 PM EDT, 31 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Aug 10, 1:17 PM EDT, 2 hours 57 minutes before
Hazardous Weather Outlook National Weather Service Baltimore MD/Washington DC 117 PM EDT Mon Aug 10 2026 ANZ530>543-DCZ001-MDZ008-011-013-014-016>018-504-506-508- VAZ053>057-527-111000- Chesapeake Bay north of Pooles Island MD- Chesapeake Bay from Pooles Island to Sandy Point MD- Chesapeake Bay from Sandy Point to North Beach MD- Chesapeake Bay from North Beach to Drum Point MD- Chesapeake Bay from Drum Point MD to Smith Point VA- Tidal Potomac from Key Bridge to Indian Head MD- Tidal Potomac from Indian Head to Cobb Island MD- Tidal Potomac from Cobb Island MD to Smith Point VA- Patapsco River including Baltimore Harbor- Chester River to Queenstown MD-Eastern Bay- Choptank River to Cambridge MD and the Little Choptank River- Patuxent River to Broomes Island MD- Tangier Sound and the inland waters surrounding Bloodsworth Island-District of Columbia-Cecil-Southern Baltimore- Prince Georges-Anne Arundel-Charles-St. Marys-Calvert- Central and Southeast Montgomery-Central and Southeast Howard- Southeast Harford-Fairfax-Arlington/Falls Church/Alexandria- Stafford-Spotsylvania-King George- Central and Southeast Prince William/Manassas/Manassas Park- 117 PM EDT Mon Aug 10 2026 This Hazardous Weather Outlook is for the Maryland portion of the Chesapeake Bay, Tidal Potomac River, and I-95 corridor through central Maryland, northern Virginia, and District of Columbia. .DAY ONE...This Afternoon and Tonight Severe Thunderstorm Watch Number 555 is in effect for the entire area except St. Mary's County until 9 PM. Scattered severe thunderstorms are possible this afternoon and evening. Damaging wind gusts are the primary hazard. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Additional severe thunderstorms capable of producing damaging winds are possible Tuesday. .SPOTTER INFORMATION STATEMENT... Skywarn Spotter Network has been activated. MDZ003>006-503-505-507-VAZ025>031-036>040-050-051-501-502-505>508- 526-WVZ050>053-055-111000- Washington-Frederick-Carroll-Northern Baltimore- Northwest Montgomery-Northwest Howard-Northwest Harford-Augusta- Rockingham-Shenandoah-Page-Warren-Clarke-Nelson-Albemarle-Greene- Madison-Rappahannock-Orange-Culpeper-Northern Fauquier- Southern Fauquier-Western Loudoun-Eastern Loudoun- Northern Virginia Blue Ridge-Central Virginia Blue Ridge- Northwest Prince William-Hampshire-Morgan-Berkeley-Jefferson- Hardy- 117 PM EDT Mon Aug 10 2026 This Hazardous Weather Outlook is for portions of eastern West Virginia, northern and central Virginia, and central and western Maryland. .DAY ONE...This Afternoon and Tonight Severe Thunderstorm Watch Number 555 is in effect for the entire area until 9 PM. Scattered severe thunderstorms are possible this afternoon and evening. Damaging wind gusts are the primary hazard. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Additional strong to severe thunderstorms capable of producing damaging winds are possible Tuesday. .SPOTTER INFORMATION STATEMENT... Skywarn Spotter Network has been activated. MDZ501-502-509-510-VAZ503-504-WVZ501>506-111000- Extreme Western Allegany-Central and Eastern Allegany- Western Garrett-Eastern Garrett-Western Highland-Eastern Highland- Western Grant-Eastern Grant-Western Mineral-Eastern Mineral- Western Pendleton-Eastern Pendleton- 117 PM EDT Mon Aug 10 2026 This Hazardous Weather Outlook is for the Allegheny Front counties in western Maryland, eastern West Virginia, and Highland County Virginia. .DAY ONE...This Afternoon and Tonight Severe Thunderstorm Watch Number 555 is in effect for the entire area until 9 PM. Scattered thunderstorms are possible this afternoon and evening. Damaging wind gusts and isolated instances of flash flooding are possible. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Additional severe thunderstorms capable of producing damaging winds and isolated instances of flash flooding are possible Tuesday. .SPOTTER INFORMATION STATEMENT... Skywarn Spotter Network has been activated.
In the hours before
Local storm report, Aug 10, 3:53 PM EDT, 21 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Local storm report, Aug 10, 3:55 PM EDT, 19 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Local storm report, Aug 10, 4:03 PM EDT, 11 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Local storm report, Aug 10, 4:06 PM EDT, 8 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Local storm report, Aug 10, 4:08 PM EDT, 6 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Local storm report, Aug 10, 4:11 PM EDT, 3 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 2:40 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Shenandoah, City of Winchester | 53 min |
| Aug 10, 2:54 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Page, Rockingham, Shenandoah, Warren | 51 min |
| Aug 10, 2:57 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, Highland, Rockingham, City of Harrisonburg | 63 min |
| Aug 10, 3:13 PM EDT | Special Marine Warning | LWX | 62 min | |
| Aug 10, 3:15 PM EDT | Severe Thunderstorm Warning | LWX | Loudoun | 60 min |
| Aug 10, 3:27 PM EDT | Severe Thunderstorm Warning | LWX | Clarke | 18 min |
| Aug 10, 3:31 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Fauquier, Loudoun, Madison, Page, Rappahannock and 1 more | 29 min |
| Aug 10, 3:38 PM EDT | Severe Thunderstorm Warning | LWX | Page, Rappahannock, Shenandoah, Warren | 37 min |
| Aug 10, 3:42 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, Rockingham, Shenandoah, City of Harrisonburg, City of Staunton, City of Waynesboro | 48 min |
| Aug 10, 3:44 PM EDT | Special Marine Warning | LWX | 107 min | |
| Aug 10, 3:48 PM EDT | Special Marine Warning | LWX | 86 min | |
| Aug 10, 3:57 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, Loudoun, City of Alexandria, City of Fairfax, City of Falls Church | 48 min |
| Aug 10, 4:00 PM EDT | Special Marine Warning | LWX | 2 hr | |
| Aug 10, 4:03 PM EDT | Severe Thunderstorm Warning | LWX | Culpeper, Fairfax, Fauquier, Loudoun, Madison, Prince William and 4 more | 57 min |
| Aug 10, 4:04 PM EDT | Special Marine Warning | LWX | 116 min | |
| Aug 10, 4:06 PM EDT | Severe Thunderstorm Warning | LWX | Albemarle, Culpeper, Greene, Madison, Nelson, Orange and 5 more | 69 min |
| Aug 10, 4:36 PM EDT | Special Marine Warning | LWX | 114 min | |
| Aug 10, 5:05 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, City of Alexandria | 25 min |
| Aug 10, 5:19 PM EDT | Special Marine Warning | LWX | 116 min | |
| Aug 10, 5:20 PM EDT | Special Marine Warning | LWX | 115 min | |
| Aug 10, 5:30 PM EDT | Severe Thunderstorm Warning | LWX | King George, Stafford | 45 min |
| Aug 10, 5:53 PM EDT | Special Marine Warning | LWX | 37 min | |
| Aug 10, 5:57 PM EDT | Special Marine Warning | LWX | 2 hr | |
| Aug 10, 1:14 PM EDT | Severe Thunderstorm Warning | LWX | Garrett | 61 min |
| Aug 10, 1:48 PM EDT | Severe Thunderstorm Warning | LWX | Allegany | 57 min |
| Aug 10, 1:49 PM EDT | Tornado Warning | LWX | Allegany, Garrett | 26 min |
| Aug 10, 1:57 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 48 min |
| Aug 10, 2:25 PM EDT | Severe Thunderstorm Warning | LWX | Allegany, Washington | 35 min |
| Aug 10, 2:29 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 31 min |
| Aug 10, 2:43 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 50 min |
| Aug 10, 2:46 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 44 min |
| Aug 10, 2:50 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 25 min |
| Aug 10, 2:56 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 38 min |
| Aug 10, 3:10 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 65 min |
| Aug 10, 3:12 PM EDT | Flash Flood Warning | LWX | Frederick, Washington | 3 hr |
| Aug 10, 3:12 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 48 min |
| Aug 10, 3:21 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick | 39 min |
| Aug 10, 3:55 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Frederick, Harford, Howard, Montgomery and 1 more | 50 min |
| Aug 10, 4:10 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Howard | 35 min |
| Aug 10, 4:18 PM EDT | Tornado Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 13 min |
| Aug 10, 4:33 PM EDT | Severe Thunderstorm Warning | LWX | Cecil, Harford | 42 min |
| Aug 10, 4:41 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, Calvert, Howard, Prince George's, City of Baltimore | 31 min |
| Aug 10, 5:21 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 24 min |
| Aug 10, 5:29 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Charles, Prince George's, Saint Mary's | 46 min |
| Aug 10, 5:33 PM EDT | Severe Thunderstorm Warning | LWX | Cecil | 27 min |
| Aug 10, 5:36 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Calvert, Prince George's | 24 min |
| Aug 10, 5:40 PM EDT | Flash Flood Warning | LWX | Baltimore, Harford, City of Baltimore | 88 min |
| Aug 10, 5:56 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 64 min |
| Aug 10, 6:51 PM EDT | Severe Thunderstorm Warning | LWX | Saint Mary's | 24 min |
Nearby
Tornado Warnings in Maryland, 2026Every tornado warning in 2026Tornadoes in 2026
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.