Alert archive / Maryland / Flash Flood Warnings in 2017
Flash Flood Warning 13, NWS Baltimore/Washington
NWS Baltimore/Washington issued this flash flood warning at Jul 4, 2017, 3:51 PM EDT for Allegany County, Maryland; Mineral County, West Virginia. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 4, 2017, 3:51 PM EDT (19:51 UTC)
- Expired
- Jul 4, 2017, 6:45 PM EDT
- In force
- 3 hr
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Flood severity
- None
Counties Allegany County, MD, Mineral County, WV
The radar
The Sterling radar (KLWX), 134 km from the middle of the area, began a volume at 19:51 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 nearest sounding before it
Pittsburgh, PA (KAGC), launched 12:00Z, 7.9 hours before the alert went out and 141 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1092 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
311 WGUS51 KLWX 041951 FFWLWX MDC001-WVC057-042245- /O.NEW.KLWX.FF.W.0013.170704T1951Z-170704T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Baltimore MD/Washington DC 351 PM EDT TUE JUL 4 2017 The National Weather Service in Sterling Virginia has issued a * Flash Flood Warning for... Northwestern Allegany County in western Maryland... Northeastern Mineral County in eastern West Virginia... * Until 645 PM EDT * At 350 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the area. Up to two inches of rain have already fallen, and additional rainfall is expected. Flash flooding is expected to begin shortly. * Some locations that may experience flooding include... Cumberland, La Vale and Ridgeley. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Keep children away from storm drains, culverts, creeks and streams. Water levels can rise rapidly and sweep children away. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route. && LAT...LON 3969 7875 3965 7873 3963 7877 3967 7880 $$ LEE
1 follow-up statement
987 WGUS71 KLWX 042027 FFSLWX Flash Flood Statement National Weather Service Baltimore MD/Washington DC 427 PM EDT TUE JUL 4 2017 MDC001-WVC057-042036- /O.CAN.KLWX.FF.W.0013.000000T0000Z-170704T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Allegany MD-Mineral WV- 427 PM EDT TUE JUL 4 2017 ...THE FLASH FLOOD WARNING FOR NORTHWESTERN ALLEGANY AND NORTHEASTERN MINERAL COUNTIES IS CANCELLED... The heavy rain has ended. Flash flooding is no longer expected. Be alert for remaining standing water and continue to follow road closures. LAT...LON 3969 7875 3965 7873 3963 7877 3967 7880 $$ LEE
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 4:45 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Washington | 45 min |
| Jul 4, 5:31 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 31 min |
| Jul 4, 6:07 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Howard, Montgomery | 38 min |
Nearby
Flash Flood Warnings in Maryland, 2017Flash Flood Warnings in West Virginia, 2017Every flash flood warning in 2017
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.