Alert archive / Maryland / Flash Flood Warnings in 1997

Flash Flood Warning 2, NWS Baltimore/Washington

June 18, 1997Allegany County, Maryland

NWS Baltimore/Washington issued this flash flood warning at Jun 18, 1997, 4:01 PM EDT for Allegany County, Maryland. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 18, 1997, 4:01 PM EDT (20:01 UTC)
Expired
Jun 18, 1997, 4:45 PM EDT
In force
44 min
Issued by
NWS Baltimore/Washington
Area
Whole counties

County Allegany County, MD

The radar

The Sterling radar (KLWX), 127 km from the middle of the area, began a volume at 20:03 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, 8.0 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 1997-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 392 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 1997-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 156 square meters per square second.193958Sfc1 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
392 J/kg
Mixed-layer CIN
-95 J/kg
Mixed-layer LCL
671 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
156 m²/s²
0-3 km storm-relative helicity
219 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.4

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 1:29 PM EDTTornado WarningLWXWashington31 min
Jun 18, 4:01 PM EDTSevere Thunderstorm WarningLWXAllegany44 min
Jun 18, 5:29 PM EDTTornado WarningLWXWashington31 min
Jun 18, 6:02 PM EDTSevere Thunderstorm WarningLWXMontgomery33 min
Jun 18, 6:34 PM EDTSevere Thunderstorm WarningLWXMontgomery31 min
Jun 18, 6:52 PM EDTSevere Thunderstorm WarningLWXPrince George's48 min
Jun 18, 7:15 PM EDTSevere Thunderstorm WarningLWXAnne Arundel30 min
Jun 18, 7:31 PM EDTSevere Thunderstorm WarningLWXCharles59 min

Nearby

Flash Flood Warnings in Maryland, 1997Every flash flood warning in 1997

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.