Alert archive / Virginia / River Flood Warnings in 2018
River Flood Warning 97, NWS Baltimore/Washington
NWS Baltimore/Washington issued this river flood warning at Sep 27, 2018, 9:31 PM EDT for Loudoun County, Virginia; Montgomery County, Maryland. It took effect at Sep 28, 2018, 3:47 AM EDT. It was in force for 72 hr.
The area
The counties it named.
The facts
- Issued
- Sep 27, 2018, 9:31 PM EDT (01:31 UTC)
- In effect from
- Sep 28, 2018, 3:47 AM EDT
- Expired
- Oct 1, 2018, 3:37 AM EDT
- In force
- 72 hr
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Flood severity
- Minor
Counties Montgomery County, MD, Loudoun County, VA
The radar
The Sterling radar (KLWX), 16 km from the middle of the area, began a volume at 01:32 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 river
Written for the forecast point Potomac River at Edwards Ferry (EDFM2). The gauge peaked at 21.35 ft at Sep 29, 2018, 12:00 PM EDT.
- Action stage
- 12.25 ft
- Minor stage
- 15 ft
- Moderate stage
- 17 ft
- Major stage
- 24 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 01644148, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
What forecasters said that day
The local office's own words before this river flood 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 river flood warning went out at Sep 27, 2:33 PM EDT, 6 hours 58 minutes earlier.
Area forecast discussion, Sep 27, 2:33 PM EDT, 6 hours 58 minutes before
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</html>Hazardous weather outlook, Sep 27, 7:45 PM EDT, 1 hour 46 minutes before
Hazardous Weather Outlook National Weather Service Baltimore MD/Washington DC 745 PM EDT Thu Sep 27 2018 ANZ530>543-DCZ001-MDZ011-013-014-016>018-508-VAZ052>057-282345- 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-Southern Baltimore-Prince Georges- Anne Arundel-Charles-St. Marys-Calvert-Southeast Harford- Prince William/Manassas/Manassas Park-Fairfax- Arlington/Falls Church/Alexandria-Stafford-Spotsylvania- King George- 745 PM EDT Thu Sep 27 2018 This Hazardous Weather Outlook is for the Maryland portion of the Chesapeake Bay, Tidal Potomac River, and adjacent counties in central Maryland and northern Virginia as well as the District of Columbia. .DAY ONE...Tonight A Flood Watch is in effect for much of northern and central Maryland and northern Virginia including the Baltimore MD and Washington DC through tonight. .DAYS TWO THROUGH SEVEN...Friday through Wednesday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. MDZ003>006-501>507-VAZ025>031-036>040-050-051-501>508-WVZ050>053- 055-501>506-282345- Washington-Frederick MD-Carroll-Northern Baltimore- Extreme Western Allegany-Central and Eastern Allegany- Northwest Montgomery-Central and Southeast Montgomery- Northwest Howard-Central and Southeast Howard-Northwest Harford- Augusta-Rockingham-Shenandoah-Frederick VA-Page-Warren-Clarke- Nelson-Albemarle-Greene-Madison-Rappahannock-Orange-Culpeper- Northern Fauquier-Southern Fauquier-Western Highland- Eastern Highland-Western Loudoun-Eastern Loudoun- Northern Virginia Blue Ridge-Central Virginia Blue Ridge- Hampshire-Morgan-Berkeley-Jefferson-Hardy-Western Grant- Eastern Grant-Western Mineral-Eastern Mineral-Western Pendleton- Eastern Pendleton- 745 PM EDT Thu Sep 27 2018 This Hazardous Weather Outlook is for eastern West Virginia, northern and central Virginia, and central and western Maryland with the exception of Garrett County. .DAY ONE...Tonight A Flood Watch is in effect for eastern West Virginia, much of central and northern Virginia and central and western Maryland through tonight. Please consult River Flood Warnings for the latest information on main stem river flooding. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Main stem river flooding may persist into the first part of the weekend, particularly on the Potomac River basin. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 8:24 PM EDT | Areal Flood Warning | LWX | Clarke, Frederick, Shenandoah, Warren, City of Winchester | 15 hr |
| Sep 27, 9:34 PM EDT | River Flood Watch | LWX | Loudoun | 62 hr |
| Sep 27, 9:36 PM EDT | River Flood Watch | LWX | Clarke, Warren | 48 hr |
| Sep 27, 9:53 PM EDT | Areal Flood Warning | LWX | Augusta, Highland, Rockingham, Shenandoah, City of Harrisonburg, City of Staunton and 1 more | 33 hr |
| Sep 28, 12:09 AM EDT | Areal Flood Warning | LWX | Frederick, Loudoun | 22 hr |
| Sep 28, 12:53 AM EDT | Coastal Flood Advisory | LWX | Arlington, City of Alexandria, City of Falls Church | 37 hr |
| Sep 28, 1:09 AM EDT | Areal Flood Warning | LWX | Arlington, Fairfax, Loudoun, City of Alexandria, City of Fairfax, City of Falls Church | 11 hr |
| Sep 28, 2:14 AM EDT | Special Marine Warning | LWX | 91 min | |
| Sep 28, 2:16 AM EDT | Special Marine Warning | LWX | 89 min | |
| Sep 28, 3:46 AM EDT | River Flood Warning | LWX | Loudoun | 56 hr |
| Sep 28, 3:49 AM EDT | River Flood Warning | LWX | Fairfax, Loudoun | 56 hr |
| Sep 28, 3:51 AM EDT | River Flood Warning | LWX | Clarke, Warren | 58 hr |
| Sep 28, 4:58 AM EDT | Areal Flood Warning | LWX | Fairfax, Fauquier, Prince William, City of Manassas, City of Manassas Park | 16 hr |
| Sep 28, 6:29 AM EDT | Areal Flood Warning | LWX | Culpeper, Fauquier, Madison | 3 hr |
| Sep 28, 7:13 AM EDT | River Flood Warning | LWX | Loudoun | 11 hr |
| Sep 28, 9:57 AM EDT | River Flood Warning | LWX | Rockingham | 6 hr |
| Sep 28, 9:57 AM EDT | River Flood Warning | LWX | Page | 16 hr |
| Sep 28, 12:40 PM EDT | River Flood Warning | LWX | Culpeper, Fauquier | 9 hr |
| Sep 27, 8:36 PM EDT | Areal Flood Warning | LWX | Allegany | 9 hr |
| Sep 27, 9:26 PM EDT | River Flood Warning | LWX | Washington | 61 hr |
| Sep 27, 10:06 PM EDT | Areal Flood Warning | LWX | Allegany, Washington | 31 hr |
| Sep 27, 11:37 PM EDT | River Flood Warning | LWX | Montgomery | 11 hr |
| Sep 27, 11:45 PM EDT | River Flood Warning | LWX | Garrett | 4 hr |
| Sep 28, 2:03 AM EDT | Areal Flood Warning | LWX | Anne Arundel, Baltimore, Carroll, Harford, Howard, Prince George's and 1 more | 20 hr |
| Sep 28, 3:54 AM EDT | River Flood Warning | LWX | Washington | 22 hr |
| Sep 28, 3:55 AM EDT | River Flood Warning | LWX | Frederick | 22 hr |
| Sep 28, 3:57 AM EDT | River Flood Watch | LWX | Allegany | 29 hr |
| Sep 28, 8:44 AM EDT | River Flood Watch | LWX | Washington | 41 hr |
| Sep 28, 9:53 AM EDT | River Flood Warning | LWX | Allegany | 16 hr |
| Sep 28, 9:54 AM EDT | River Flood Warning | LWX | Washington | 32 hr |
| Sep 28, 1:56 PM EDT | Coastal Flood Advisory | LWX | Anne Arundel, Saint Mary's | 8 hr |
| Sep 27, 9:14 PM EDT | River Flood Warning | LWX | Berkeley, Jefferson | 36 hr |
| Sep 28, 12:35 AM EDT | River Flood Warning | LWX | Pendleton | 3 hr |
| Sep 28, 3:41 AM EDT | River Flood Warning | LWX | Hampshire, Hardy | 22 hr |
| Sep 28, 4:00 AM EDT | River Flood Watch | LWX | Morgan | 4 hr |
| Sep 28, 7:45 AM EDT | River Flood Warning | LWX | Morgan | 21 hr |
Nearby
River Flood Warnings in Virginia, 2018River Flood Warnings in Maryland, 2018Every river flood warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.