Alert archive / Virginia / River Flood Warnings in 2018
River Flood Warning 7, NWS Baltimore/Washington
NWS Baltimore/Washington issued this river flood warning at Apr 18, 2018, 6:17 AM EDT for Loudoun County, Virginia; Montgomery County, Maryland. It took effect at Apr 18, 2018, 8:00 AM EDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Apr 18, 2018, 6:17 AM EDT (10:17 UTC)
- In effect from
- Apr 18, 2018, 8:00 AM EDT
- Expired
- Apr 18, 2018, 2:21 PM EDT
- In force
- 6 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 10:14 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 15.13 ft at Apr 18, 2018, 10:00 AM 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.
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 4:24 AM EDT | Gale Warning | LWX | 42 hr | |
| Apr 18, 4:24 AM EDT | Small Craft Advisory | LWX | 13 hr | |
| Apr 18, 4:24 AM EDT | Small Craft Advisory | LWX | 24 hr | |
| Apr 18, 10:12 AM EDT | Small Craft Advisory | LWX | 65 hr | |
| Apr 18, 2:22 PM EDT | Wind Advisory | LWX | Albemarle, Amherst, Augusta, Greene, Highland, Madison and 6 more | 27 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.