Alert archive / Maryland / Flash Flood Warnings in 2026

Flash Flood Warning 33, NWS Baltimore/Washington

August 7, 2026Baltimore County, Harford County, Maryland

NWS Baltimore/Washington issued this flash flood warning at Aug 7, 2026, 4:43 PM EDT for Baltimore County, Harford County, Maryland. 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 counties it named.

The facts

Issued
Aug 7, 2026, 4:43 PM EDT (20:43 UTC)
Expired
Aug 7, 2026, 7:24 PM EDT
In force
3 hr
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Flood severity
None

Counties Baltimore County, MD, Harford County, MD

The radar

The Sterling radar (KLWX), 105 km from the middle of the area, began a volume at 20:42 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, 8.7 hours before the alert went out and 101 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.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2026-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 514 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2026-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
514 J/kg
Mixed-layer CIN
-149 J/kg
Mixed-layer LCL
1052 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 4:27 AM EDTSmall Craft AdvisoryLWX21 hr
Aug 7, 3:29 PM EDTSevere Thunderstorm WarningLWXLoudoun46 min
Aug 7, 4:00 PM EDTSevere Thunderstorm WarningLWXAlbemarle, City of Charlottesville60 min
Aug 7, 5:02 PM EDTSpecial Marine WarningLWX118 min
Aug 7, 5:36 PM EDTSevere Thunderstorm WarningLWXRockingham54 min
Aug 7, 5:58 PM EDTSevere Thunderstorm WarningLWXFairfax, Loudoun27 min
Aug 7, 3:07 PM EDTSevere Thunderstorm WarningLWXWashington23 min
Aug 7, 4:02 PM EDTSevere Thunderstorm WarningLWXBaltimore, Harford41 min
Aug 7, 4:56 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Prince George's15 min
Aug 7, 5:19 PM EDTSevere Thunderstorm WarningLWXBaltimore, City of Baltimore29 min
Aug 7, 5:22 PM EDTFlash Flood WarningLWXBaltimore, City of Baltimore3 hr
Aug 7, 6:23 PM EDTFlash Flood WarningLWXMontgomery46 min

Nearby

Flash Flood Warnings in Maryland, 2026Every flash flood warning in 2026

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.