Alert archive / Maryland / River Flood Warnings in 2018

River Flood Warning 63, NWS Baltimore/Washington

July 24, 2018Washington County, Maryland

NWS Baltimore/Washington issued this river flood warning at Jul 24, 2018, 10:20 AM EDT for Washington County, Maryland. It took effect at Jul 25, 2018, 1:27 PM EDT. It was in force for 27 hr.

The area

The counties it named.

The facts

Issued: Jul 24, 2018, 10:20 AM EDT (14:20 UTC)
In effect from: Jul 25, 2018, 1:27 PM EDT
Expired: Jul 26, 2018, 4:00 PM EDT
In force: 27 hr
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Flood severity: Minor

County Washington County, MD

The radar

The Sterling radar (KLWX), 75 km from the middle of the area, began a volume at 14:19 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 Conococheague Creek at Fairview (FAVM2). The gauge peaked at 7.32 ft at Jul 26, 2018, 8:00 PM EDT.

Action stage: 8 ft
Minor stage: 10 ft
Moderate stage: 12 ft
Major stage: 15 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01614500, 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 Jul 24, 9:53 AM EDT, 27 minutes earlier.

Area forecast discussion, Jul 24, 9:53 AM EDT, 27 minutes before

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Hazardous weather outlook, Jul 24, 5:33 AM EDT, 4 hours 47 minutes before

Hazardous Weather Outlook
National Weather Service Baltimore MD/Washington DC
533 AM EDT Tue Jul 24 2018

ANZ530>543-DCZ001-MDZ011-013-014-016>018-508-VAZ052>057-251000-
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-
533 AM EDT Tue Jul 24 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...Today and Tonight

A Flash Flood Watch is in effect.

Scattered showers and thunderstorms with gusty winds over the
waters may require Special Marine Warnings.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

A Flash Flood Watch remains in effect through Wednesday afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time. Please report
rainfall totals and any observed flooding to the National Weather
Service.

MDZ003>006-501>507-VAZ025>031-036>040-050-051-501>508-WVZ050>053-
055-501>506-251000-
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-
533 AM EDT Tue Jul 24 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...Today and Tonight

A Flash Flood Watch is in effect for all areas along and east of
the Interstate 81 corridor.

River flooding is likely on area mainstem rivers due to excessive
runoff from heavy rain, mainly east of the Blue Ridge.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

A Flash Flood Watch is in effect for all areas along and east of
the Interstate 81 corridor through Wednesday afternoon.

River flooding is likely on area mainstem rivers due to excessive
runoff from heavy rain, mainly east of the Blue Ridge through at
least Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.  Please report
rainfall totals and any observed flooding to the National Weather
Service.

In the hours before

Local storm report, Jul 24, 8:27 AM EDT, 1 hour 53 minutes before

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Local storm report, Jul 24, 8:31 AM EDT, 1 hour 49 minutes before

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Local storm report, Jul 24, 9:04 AM EDT, 1 hour 16 minutes before

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Local storm report, Jul 24, 9:16 AM EDT, 1 hour 4 minutes before

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Local storm report, Jul 24, 9:21 AM EDT, 59 minutes before

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Local storm report, Jul 24, 9:52 AM EDT, 28 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 5:54 AM EDT	Tornado Warning	LWX	Fairfax	21 min
Jul 24, 6:14 AM EDT	Areal Flood Warning	LWX	Fairfax, Loudoun, Prince William, City of Fairfax, City of Falls Church	8 hr
Jul 24, 9:27 AM EDT	Special Marine Warning	LWX		93 min
Jul 24, 10:22 AM EDT	Special Marine Warning	LWX		38 min
Jul 24, 10:59 AM EDT	Special Marine Warning	LWX		61 min
Jul 23, 8:11 PM EDT	Coastal Flood Advisory	LWX	Anne Arundel, Harford	35 hr
Jul 23, 8:47 PM EDT	Areal Flood Warning	LWX	Anne Arundel, Baltimore, Carroll, Howard	6 hr
Jul 23, 9:22 PM EDT	Areal Flood Warning	LWX	Anne Arundel, Baltimore, Carroll, City of Baltimore	6 hr
Jul 23, 10:34 PM EDT	Flash Flood Warning	LWX	Baltimore, Carroll	3 hr
Jul 24, 3:23 AM EDT	Areal Flood Warning	LWX	Baltimore, City of Baltimore	43 hr
Jul 24, 8:10 AM EDT	Areal Flood Warning	LWX	Anne Arundel, Calvert, Charles, Prince George's, Saint Mary's	15 hr
Jul 24, 9:05 AM EDT	Areal Flood Warning	LWX	Anne Arundel, Baltimore, Howard, Prince George's	6 hr
Jul 24, 10:21 AM EDT	River Flood Warning	LWX	Washington	39 hr
Jul 24, 11:18 AM EDT	Areal Flood Warning	LWX	Baltimore, Harford, City of Baltimore	21 hr
Jul 24, 2:58 PM EDT	Coastal Flood Advisory	LWX	Harford	21 hr
Jul 24, 3:19 PM EDT	Areal Flood Warning	LWX	Anne Arundel, Baltimore, Howard	23 hr
Jul 24, 7:12 PM EDT	Areal Flood Warning	LWX	Allegany	6 hr
Jul 24, 7:16 PM EDT	Coastal Flood Advisory	LWX	Calvert	7 hr

Nearby

River Flood Warnings in Maryland, 2018 Every 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.