Alert archive / Arkansas / Flash Flood Warnings in 2018

Flash Flood Warning 103, NWS Little Rock, AR

August 18, 2018Drew County, Arkansas

NWS Little Rock, AR issued this flash flood warning at Aug 18, 2018, 10:29 AM CDT for Drew County, Arkansas. 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: Aug 18, 2018, 10:29 AM CDT (15:29 UTC)
Expired: Aug 18, 2018, 1:30 PM CDT
In force: 3 hr
Issued by: NWS Little Rock, AR
Area: Storm-based polygon
Flood severity: None

County Drew County, AR

The radar

The Little Rock radar (KLZK), 147 km from the middle of the area, began a volume at 15:30 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

Jackson, MS (KJAN), launched 12:00Z, 3.5 hours before the alert went out and 208 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1565 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 715 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Little Rock, AR wrote its last area forecast discussion before this flash flood warning went out at Aug 18, 6:39 AM CDT, 3 hours 50 minutes earlier.

Area forecast discussion, Aug 18, 6:39 AM CDT, 3 hours 50 minutes before

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Hazardous weather outlook, Aug 18, 3:55 AM CDT, 6 hours 34 minutes before

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In the hours before

Special weather statement, Aug 18, 10:23 AM CDT, 6 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 10:23 AM CDT	Special Weather Statement	LZK	Drew	52 min
Aug 18, 10:59 AM CDT	River Flood Warning	LZK	Jackson, Woodruff	20 days

Nearby

Flash Flood Warnings in Arkansas, 2018 Every flash flood warning in 2018

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.