Alert archive / Arkansas / Flash Flood Warnings in 2009

Flash Flood Warning 151, NWS Little Rock, AR

October 13, 20097 counties in Arkansas

NWS Little Rock, AR issued this flash flood warning at Oct 13, 2009, 10:34 AM CDT for 7 counties in Arkansas. It was in force for 8 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
Oct 13, 2009, 10:34 AM CDT (15:34 UTC)
Expired
Oct 13, 2009, 6:30 PM CDT
In force
8 hr
Issued by
NWS Little Rock, AR
Area
Storm-based polygon
Flood severity
None

Counties Clark County, AR, Cleveland County, AR, Dallas County, AR, Grant County, AR, Hot Spring County, AR, Jefferson County, AR, Lincoln County, AR

The radar

The Little Rock radar (KLZK), 83 km from the middle of the area, began a volume at 15:35 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

Shreveport, LA (KSHV), launched 12:00Z, 3.6 hours before the alert went out and 218 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, Shreveport, LA at 12:00Z on 2009-10-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 567 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, Shreveport, LA at 12:00Z on 2009-10-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 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
567 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
476 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
157 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.6

Open this sounding in Storm Lab

The office that day

Everything else NWS Little Rock, AR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 12, 10:19 PM CDTDense Fog AdvisoryLZKArkansas, Baxter, Bradley, Calhoun, Clark, Cleburne and 28 more11 hr
Oct 13, 9:07 AM CDTRiver Flood WarningLZKPerry4 days
Oct 13, 9:46 AM CDTFlash Flood WarningLZKBradley, Calhoun, Clark, Cleveland, Dallas, Desha and 4 more11 hr
Oct 13, 10:22 AM CDTFlash Flood WatchLZKArkansas, Bradley, Calhoun, Clark, Cleveland, Dallas and 14 more9 hr
Oct 13, 12:18 PM CDTFlash Flood WarningLZKArkansas, Desha, Jefferson, Lincoln, Lonoke, Monroe and 1 more6 hr
Oct 13, 1:57 PM CDTRiver Flood WarningLZKClark, Nevada, Ouachita20 hr

Nearby

Flash Flood Warnings in Arkansas, 2009Every flash flood warning in 2009

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.