Alert archive / Maryland / Flash Flood Warnings in 1989

Flash Flood Warning 13, NWS Baltimore/Washington

May 5, 1989Charles County, Maryland

NWS Baltimore/Washington issued this flash flood warning at May 5, 1989, 11:58 PM EDT for Charles County, Maryland. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
May 5, 1989, 11:58 PM EDT (03:58 UTC)
Expired
May 6, 1989, 4:00 AM EDT
In force
4 hr
Issued by
NWS Baltimore/Washington
Area
Whole counties

County Charles County, MD

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 00:00Z, 4.0 hours before the alert went out and 243 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, Atlantic City In, NJ at 00:00Z on 1989-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Atlantic City In, NJ at 00:00Z on 1989-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 319 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
633 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
319 m²/s²
0-3 km storm-relative helicity
301 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
May 5, 10:52 PM EDTFlash Flood WarningLWXPrince George's4 hr
May 5, 11:58 PM EDTFlash Flood WarningLWXAnne Arundel, Baltimore, Howard, City of Baltimore4 hr
May 5, 11:58 PM EDTFlash Flood WarningLWXCarroll4 hr
May 6, 12:44 AM EDTSevere Thunderstorm WarningLWXKent61 min
May 6, 12:44 AM EDTSevere Thunderstorm WarningLWXBaltimore61 min
May 6, 1:09 AM EDTFlash Flood WarningLWXCaroline, Kent, Queen Anne's, Talbot4 hr
May 6, 1:09 AM EDTFlash Flood WarningLWXCalvert, Saint Mary's4 hr
May 6, 1:09 AM EDTFlash Flood WarningLWXDorchester4 hr
May 6, 4:06 PM EDTSevere Thunderstorm WarningLWXMontgomery54 min
May 6, 4:32 PM EDTSevere Thunderstorm WarningLWXCarroll, Howard58 min
May 6, 5:17 PM EDTSevere Thunderstorm WarningLWXCalvert, Charles, Saint Mary's88 min
May 5, 10:00 PM EDTFlash Flood WarningLWXArlington, Fairfax4 hr
May 5, 10:00 PM EDTFlash Flood WarningLWXKing George4 hr
May 5, 10:00 PM EDTFlash Flood WarningLWXClarke, Fauquier, Frederick, Page, Rappahannock, Shenandoah and 1 more4 hr
May 5, 10:00 PM EDTFlash Flood WarningLWXLoudoun, Prince William4 hr
May 5, 10:00 PM EDTFlash Flood WarningLWXCulpeper4 hr
May 5, 10:52 PM EDTFlash Flood WarningLWXKing George, Stafford4 hr
May 5, 10:52 PM EDTFlash Flood WarningLWXGreene, Madison, Orange4 hr
May 6, 3:41 PM EDTSevere Thunderstorm WarningLWXLoudoun64 min
May 6, 4:58 PM EDTSevere Thunderstorm WarningLWXKing George32 min

Nearby

Flash Flood Warnings in Maryland, 1989Every flash flood warning in 1989

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.