Alert archive / Arkansas / Flash Flood Warnings in 1999

Flash Flood Warning 34, NWS Shreveport, LA

March 13, 19995 counties in Arkansas

NWS Shreveport, LA issued this flash flood warning at Mar 13, 1999, 3:22 AM CST for 5 counties in Arkansas. It was in force for 4 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
Mar 13, 1999, 3:22 AM CST (09:22 UTC)
Expired
Mar 13, 1999, 7:30 AM CST
In force
4 hr
Issued by
NWS Shreveport, LA
Area
Whole counties

Counties Hempstead County, AR, Howard County, AR, Lafayette County, AR, Nevada County, AR, Sevier County, AR

The radar

The Shreveport radar (KSHV), 144 km from the middle of the area, began a volume at 09:21 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

Fort Worth, TX (KFWD), launched 00:00Z, 9.4 hours before the alert went out and 343 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, Fort Worth, TX at 00:00Z on 1999-03-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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, Fort Worth, TX at 00:00Z on 1999-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 270 square meters per square second.1939587897Sfc1 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
461 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
270 m²/s²
0-3 km storm-relative helicity
390 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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 Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 12, 9:45 PM CSTSevere Thunderstorm WarningSHVAngelina60 min
Mar 13, 12:26 AM CSTSevere Thunderstorm WarningSHVCaddo64 min
Mar 13, 5:34 AM CSTSevere Thunderstorm WarningSHVGrant51 min
Mar 13, 6:05 AM CSTSevere Thunderstorm WarningSHVLaSalle50 min

Nearby

Flash Flood Warnings in Arkansas, 1999Every flash flood warning in 1999

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.