Alert archive / Arkansas / Flash Flood Warnings in 2018

Flash Flood Warning 14, NWS Little Rock, AR

February 22, 201811 counties in Arkansas

NWS Little Rock, AR issued this flash flood warning at Feb 22, 2018, 8:54 PM CST for 11 counties in 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: Feb 22, 2018, 8:54 PM CST (02:54 UTC)
Expired: Feb 22, 2018, 11:45 PM CST
In force: 3 hr
Issued by: NWS Little Rock, AR
Area: Storm-based polygon
Flood severity: None

Counties Clark County, AR, Dallas County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Lonoke County, AR, Ouachita County, AR, Perry County, AR, Pulaski County, AR, Saline County, AR

The radar

The Little Rock radar (KLZK), 56 km from the middle of the area, began a volume at 02:56 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 (KBAD), launched 00:00Z, 2.9 hours before the alert went out and 242 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: 124 J/kg
Mixed-layer CIN: -158 J/kg
Mixed-layer LCL: 422 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 290 m²/s²
0-3 km storm-relative helicity: 380 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.5

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 Feb 22, 8:15 PM CST, 39 minutes earlier.

Area forecast discussion, Feb 22, 8:15 PM CST, 39 minutes before

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Hazardous weather outlook, Feb 22, 3:45 PM CST, 5 hours 9 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Little Rock AR
345 PM CST Thu Feb 22 2018

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-231100-
Boone-Marion-Baxter-Fulton-Sharp-Newton-Searcy-Stone-Izard-
Independence-Johnson-Pope-Van Buren-Cleburne-Jackson-Logan-Conway-
Faulkner-White-Woodruff-Scott-Yell-Perry-Polk-Montgomery-Garland-
Saline-Pulaski-Lonoke-Prairie-Monroe-Pike-Clark-Hot Spring-Grant-
Jefferson-Arkansas-Dallas-Cleveland-Lincoln-Desha-Ouachita-
Calhoun-Bradley-Drew-
345 PM CST Thu Feb 22 2018

This Hazardous Weather Outlook is for a Large Part of Arkansas.

.DAY ONE...This Evening through Tonight

Rainfall, heavy at times, will continue to be seen this afternoon
and through tonight. One to two inches of rain, with isolated higher
amounts, are forecast to occur, mainly along an axis from along the
I-30 and US-67 corridor through tonight. Expect lesser amounts
outside of this axis. As a result, additional flash flooding will
remain possible for most areas given the widespread heavy rainfall
over the last few days, as well as river flooding will also
continue. Flood and flash flood watches remain in affect for all of
Arkansas. Extra caution should be used, especially at night, when
driving into areas that may have flooded.

.DAYS TWO THROUGH SEVEN...Friday Through Wednesday

Flooding continues to be the main hazard through the period. Showers
and thunderstorms will persist across much of the area on Friday,
with flooding and flash flooding remaining a major concern,
especially along and near the I-30 and US-67 corridor. An additional
one to two inches of rain is possible Friday and Friday night.

Another round of showers and thunderstorms is expected on Saturday
into Saturday night, with more heavy rainfall possible keeping the
flooding threat high. In addition to the flooding concerns, there is
a chance for some strong to severe thunderstorms Saturday afternoon
and evening across all but the northwest portion of the area. The
primary threat with the strongest storms will be damaging winds, and
a few tornadoes, with an enhanced flash flood threat as a result of
additional locally heavy rainfall.

.Spotter Information Statement...

Significant reports of flooding will be appreciated, though the
severe weather threat will remain low through Friday night. However,
spotter activation may be need on Saturday afternoon and evening.

&&

Visit NWS Little Rock on the web. Go to http://weather.gov/lzk.

46/67/62/59

In the hours before

Local storm report, Feb 22, 4:30 PM CST, 4 hours 24 minutes before

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Local storm report, Feb 22, 6:58 PM CST, 1 hour 56 minutes before

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Local storm report, Feb 22, 7:45 PM CST, 1 hour 9 minutes before

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Local storm report, Feb 22, 7:51 PM CST, 1 hour 3 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 22, 6:42 PM CST	Areal Flood Warning	LZK	Conway, Faulkner, Jackson, Lonoke, Perry, Prairie and 4 more	6 hr
Feb 22, 11:41 PM CST	Flash Flood Warning	LZK	Lonoke, Monroe, Prairie, Woodruff	3 hr
Feb 23, 1:58 AM CST	Areal Flood Warning	LZK	Clark, Conway, Faulkner, Garland, Hot Spring, Montgomery and 6 more	6 hr
Feb 23, 2:11 AM CST	Areal Flood Warning	LZK	Cleburne, Conway, Independence, Izard, Jackson, Lonoke and 6 more	6 hr
Feb 23, 3:47 AM CST	Flash Flood Warning	LZK	Hot Spring	6 hr
Feb 23, 4:35 AM CST	Areal Flood Warning	LZK	Cleveland, Dallas, Grant, Jefferson, Lonoke, Monroe and 4 more	6 hr
Feb 23, 4:44 AM CST	Areal Flood Warning	LZK	Faulkner	24 hr
Feb 23, 7:39 AM CST	Areal Flood Warning	LZK	Clark, Conway, Faulkner, Garland, Hot Spring, Montgomery and 6 more	6 hr
Feb 23, 7:46 AM CST	Areal Flood Warning	LZK	Cleburne, Conway, Independence, Izard, Jackson, Lonoke and 7 more	6 hr
Feb 23, 8:08 AM CST	Flash Flood Warning	LZK	Garland, Montgomery, Pike, Polk, Scott, Yell	3 hr
Feb 23, 9:28 AM CST	River Flood Warning	LZK	Lawrence, Randolph	3 days
Feb 23, 9:37 AM CST	Flash Flood Warning	LZK	Hot Spring	3 hr
Feb 23, 9:39 AM CST	River Flood Warning	LZK	Randolph	14 days
Feb 23, 9:58 AM CST	River Flood Warning	LZK	Independence	4 days
Feb 23, 10:23 AM CST	Areal Flood Warning	LZK	Cleveland, Dallas, Grant, Jefferson, Lonoke, Monroe and 4 more	3 hr
Feb 23, 10:48 AM CST	River Flood Warning	LZK	Independence, Jackson	8 days
Feb 23, 10:50 AM CST	River Flood Warning	LZK	Prairie, White, Woodruff	23 days
Feb 23, 11:00 AM CST	River Flood Warning	LZK	Prairie	23 days
Feb 23, 12:22 PM CST	Flash Flood Warning	LZK	Hot Spring	3 hr
Feb 23, 1:11 PM CST	Areal Flood Warning	LZK	Cleveland, Dallas, Grant, Jefferson, Lonoke, Monroe and 4 more	15 hr
Feb 23, 1:17 PM CST	Areal Flood Warning	LZK	Clark, Conway, Faulkner, Garland, Hot Spring, Montgomery and 6 more	18 hr
Feb 23, 1:22 PM CST	Areal Flood Warning	LZK	Cleburne, Conway, Independence, Izard, Jackson, Lonoke and 7 more	18 hr
Feb 23, 3:03 PM CST	Flash Flood Warning	LZK	Hot Spring	117 min

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.