Alert archive / Maryland / Flash Flood Warnings in 2026

Flash Flood Warning 3, NWS Baltimore/Washington

July 5, 2026Allegany County, Maryland

NWS Baltimore/Washington issued this flash flood warning at Jul 5, 2026, 4:18 PM EDT for Allegany 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
Jul 5, 2026, 4:18 PM EDT (20:18 UTC)
Expired
Jul 5, 2026, 7:01 PM EDT
In force
3 hr
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Flood severity
None

County Allegany County, MD

The radar

The Sterling radar (KLWX), 127 km from the middle of the area, began a volume at 20:18 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, 8.3 hours before the alert went out and 134 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 2026-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 61 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 2026-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 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
61 J/kg
Mixed-layer CIN
-350 J/kg
Mixed-layer LCL
1346 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 4, 8:14 PM EDTSpecial Marine WarningLWX2 hr
Jul 4, 8:54 PM EDTSpecial Marine WarningLWX66 min
Jul 4, 9:04 PM EDTSpecial Marine WarningLWX63 min
Jul 4, 9:06 PM EDTSpecial Weather StatementLWXArlington, City of Alexandria24 min
Jul 5, 1:57 AM EDTHeat AdvisoryLWXArlington, Culpeper, Fairfax, Fauquier, Greene, King George and 12 more18 hr
Jul 5, 12:43 PM EDTSmall Craft AdvisoryLWX10 hr
Jul 5, 2:08 PM EDTFlood WatchLWXArlington, Fairfax, Loudoun, City of Alexandria, City of Fairfax, City of Falls Church11 hr
Jul 5, 5:29 PM EDTSevere Thunderstorm WarningLWXSpotsylvania, City of Fredericksburg46 min
Jul 5, 5:38 PM EDTSevere Thunderstorm WarningLWXCulpeper, Orange, Spotsylvania52 min
Jul 5, 6:07 PM EDTSevere Thunderstorm Warning Considerable damage threatLWXCulpeper, Fauquier, Stafford38 min
Jul 5, 6:31 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier29 min
Jul 5, 7:27 PM EDTSpecial Marine WarningLWX2 hr
Jul 5, 7:42 PM EDTSevere Thunderstorm WarningLWXFairfax33 min
Jul 4, 8:38 PM EDTSevere Thunderstorm WarningLWXCharles, Saint Mary's37 min
Jul 5, 1:11 PM EDTSevere Thunderstorm WarningLWXAllegany49 min
Jul 5, 1:49 PM EDTSevere Thunderstorm WarningLWXAllegany, Washington56 min
Jul 5, 2:12 PM EDTSpecial Weather StatementLWXAllegany33 min
Jul 5, 4:06 PM EDTSevere Thunderstorm WarningLWXAllegany39 min
Jul 5, 6:09 PM EDTSevere Thunderstorm WarningLWXCarroll, Howard, Montgomery51 min
Jul 5, 6:40 PM EDTFlash Flood WarningLWXHoward, Montgomery3 hr
Jul 5, 6:51 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll39 min
Jul 5, 7:01 PM EDTSevere Thunderstorm WarningLWXHoward, Montgomery44 min
Jul 5, 7:28 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Howard, Montgomery, Prince George's32 min
Jul 5, 7:40 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Prince George's35 min
Jul 5, 7:57 PM EDTSevere Thunderstorm WarningLWXHoward, Montgomery, Prince George's33 min
Jul 5, 3:14 PM EDTSpecial Weather StatementLWXMineral31 min
Jul 5, 3:57 PM EDTSpecial Weather StatementLWXMineral33 min
Jul 5, 7:09 PM EDTFlash Flood WarningLWXPendleton2 hr

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.