Alert archive / Virginia / Flash Flood Warnings in 2021
Flash Flood Warning 55, NWS Baltimore/Washington
NWS Baltimore/Washington issued this flash flood warning at Aug 26, 2021, 7:58 PM EDT for Rockingham County, Virginia. It was in force for 69 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 26, 2021, 7:58 PM EDT (23:58 UTC)
- Expired
- Aug 26, 2021, 9:07 PM EDT
- In force
- 69 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Rockingham County, VA
The radar
The Sterling radar (KLWX), 137 km from the middle of the area, began a volume at 00:00 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 nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 12.0 hours before the alert went out and 143 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
- 809 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 1088 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
609
WGUS51 KLWX 262358
FFWLWX
VAC165-270300-
/O.NEW.KLWX.FF.W.0055.210826T2358Z-210827T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Baltimore MD/Washington DC
758 PM EDT Thu Aug 26 2021
The National Weather Service in Sterling Virginia has issued a
* Flash Flood Warning for...
Central Rockingham County in western Virginia...
* Until 1100 PM EDT.
* At 758 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Additional rainfall amounts of 1 to 2 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Sparkling Springs...
Singers Glen...
Cherry Grove...
Hinton...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3856 7904 3860 7897 3861 7885 3851 7884
3847 7890 3845 7897 3845 7901 3850 7900
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
DHOF1 follow-up statement
489
WGUS71 KLWX 270107
FFSLWX
Flash Flood Statement
National Weather Service Baltimore MD/Washington DC
907 PM EDT Thu Aug 26 2021
VAC165-270117-
/O.CAN.KLWX.FF.W.0055.000000T0000Z-210827T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Rockingham VA-
907 PM EDT Thu Aug 26 2021
...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL ROCKINGHAM COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3856 7904 3860 7897 3861 7885 3851 7884
3847 7890 3845 7897 3845 7901 3850 7900
$$
LFRThe office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 1:15 PM EDT | Special Marine Warning | LWX | 60 min | |
| Aug 26, 1:25 PM EDT | Severe Thunderstorm Warning | LWX | Prince William, Stafford | 50 min |
| Aug 26, 2:20 PM EDT | Severe Thunderstorm Warning | LWX | Stafford | 40 min |
| Aug 26, 2:43 PM EDT | Areal Flood Warning | LWX | Stafford | 3 hr |
| Aug 26, 3:31 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, City of Alexandria | 44 min |
| Aug 26, 3:32 PM EDT | Special Marine Warning | LWX | 58 min | |
| Aug 26, 3:45 PM EDT | Areal Flood Warning | LWX | Arlington | 3 hr |
| Aug 26, 4:02 PM EDT | Severe Thunderstorm Warning | LWX | Rockingham, Shenandoah | 31 min |
| Aug 26, 4:03 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax | 42 min |
| Aug 26, 6:42 PM EDT | Severe Thunderstorm Warning | LWX | Augusta, Rockingham | 48 min |
| Aug 26, 7:08 PM EDT | Flash Flood Warning | LWX | Augusta, Rockingham | 118 min |
Nearby
Flash Flood Warnings in Virginia, 2021Every flash flood warning in 2021
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.