Alert archive / Arkansas / Flood Watches in 2021

Flood Watch 1, NWS Little Rock, AR

February 27, 202112 counties in Arkansas

NWS Little Rock, AR issued this flood watch at Feb 27, 2021, 2:36 AM CST for 12 counties in Arkansas. It took effect at Feb 28, 2021, 6:00 AM CST. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued: Feb 27, 2021, 2:36 AM CST (08:36 UTC)
In effect from: Feb 28, 2021, 6:00 AM CST
Expired: Mar 1, 2021, 1:59 AM CST
In force: 20 hr
Issued by: NWS Little Rock, AR
Flood severity: None

Counties Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Cleveland County, AR, Desha County, AR, Drew County, AR, Jefferson County, AR, Lincoln County, AR, Lonoke County, AR, Monroe County, AR, Prairie County, AR, Woodruff County, AR

The radar

The Little Rock radar (KLZK), 87 km from the middle of the area, began a volume at 08:36 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

Little Rock, AR (KLZK), launched 00:00Z, 8.6 hours before the alert went out and 178 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 501 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 403 m²/s²
0-3 km storm-relative helicity: 458 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 flood watch 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 flood watch went out at Feb 26, 11:25 PM CST, 3 hours 11 minutes earlier.

Area forecast discussion, Feb 26, 11:25 PM CST, 3 hours 11 minutes before

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Hazardous weather outlook, Feb 26, 9:23 PM CST, 5 hours 13 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
Feb 26, 6:48 PM CST	River Flood Advisory	LZK	Clark, Hot Spring	19 hr
Feb 26, 9:06 PM CST	Dense Fog Advisory	LZK	Arkansas, Baxter, Bradley, Calhoun, Clark, Cleburne and 30 more	13 hr

Nearby

Flood Watches in Arkansas, 2021 Every flood watch in 2021

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.