Alert archive / Maryland / River Flood Warnings in 2018

River Flood Warning 9, NWS Baltimore/Washington

May 17, 2018Frederick County, Maryland

NWS Baltimore/Washington issued this river flood warning at May 17, 2018, 6:57 AM EDT for Frederick County, Maryland. It took effect at May 17, 2018, 1:25 PM EDT. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued: May 17, 2018, 6:57 AM EDT (10:57 UTC)
In effect from: May 17, 2018, 1:25 PM EDT
Expired: May 18, 2018, 9:53 AM EDT
In force: 20 hr
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Flood severity: Moderate

County Frederick County, MD

The radar

The Sterling radar (KLWX), 56 km from the middle of the area, began a volume at 11:00 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 Monocacy River near Frederick at Interstate 70 (FDKM2). The gauge peaked at 14.10 ft at May 17, 2018, 1:00 PM EDT.

Action stage: 13 ft
Minor stage: 15 ft
Moderate stage: 17 ft
Major stage: 20 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01643000, 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 May 17, 4:17 AM EDT, 2 hours 40 minutes earlier.

Area forecast discussion, May 17, 4:17 AM EDT, 2 hours 40 minutes before

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Hazardous weather outlook, May 17, 5:38 AM EDT, 1 hour 19 minutes before

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In the hours before

Local storm report, May 17, 4:48 AM EDT, 2 hours 9 minutes before

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Local storm report, May 17, 6:47 AM EDT, 10 minutes before

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Local storm report, May 17, 6:48 AM EDT, 9 minutes before

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      <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.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 8:40 PM EDT	Areal Flood Warning	LWX	Clarke, Frederick, Warren, City of Winchester	12 hr
May 16, 11:58 PM EDT	Areal Flood Warning	LWX	Clarke, Loudoun	14 hr
May 17, 7:13 AM EDT	Areal Flood Warning	LWX	Loudoun	8 hr
May 17, 7:36 AM EDT	Coastal Flood Advisory	LWX	Arlington, City of Alexandria, City of Falls Church	4 hr
May 17, 8:16 AM EDT	Areal Flood Warning	LWX	Clarke, Frederick	10 hr
May 17, 10:34 AM EDT	Coastal Flood Watch	LWX	Arlington, City of Alexandria, City of Falls Church	42 hr
May 17, 1:34 PM EDT	Small Craft Advisory	LWX		44 hr
May 17, 3:28 PM EDT	River Flood Warning	LWX	Loudoun	18 hr
May 17, 3:29 PM EDT	River Flood Warning	LWX	Culpeper, Fauquier	3 days
May 17, 3:32 PM EDT	River Flood Warning	LWX	Stafford, City of Fredericksburg	18 hr
May 17, 3:33 PM EDT	River Flood Warning	LWX	Clarke, Warren	3 days
May 17, 3:43 PM EDT	River Flood Warning	LWX	Loudoun	4 days
May 17, 3:44 PM EDT	River Flood Warning	LWX	Loudoun	4 days
May 17, 3:44 PM EDT	River Flood Warning	LWX	Fairfax, Loudoun	3 days
May 17, 3:49 PM EDT	Areal Flood Warning	LWX	Nelson	6 hr
May 17, 3:50 PM EDT	Coastal Flood Advisory	LWX	Arlington, King George, City of Alexandria, City of Falls Church	3 days
May 17, 3:27 PM EDT	River Flood Warning	LWX	Montgomery	18 hr
May 17, 3:40 PM EDT	River Flood Warning	LWX	Allegany	31 hr
May 17, 3:42 PM EDT	River Flood Warning	LWX	Washington	4 days
May 17, 3:43 PM EDT	River Flood Warning	LWX	Washington	36 hr
May 17, 3:33 AM EDT	River Flood Warning	LWX	Berkeley, Jefferson	3 days
May 17, 2:48 PM EDT	River Flood Warning	LWX	Morgan	3 days
May 17, 3:22 PM EDT	River Flood Warning	LWX	Hampshire, Hardy	36 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.