Alert archive / Arkansas / Flash Flood Warnings in 2020

Flash Flood Warning 100, NWS Little Rock, AR

September 1, 20205 counties in Arkansas

NWS Little Rock, AR issued this flash flood warning at Sep 1, 2020, 11:09 AM CDT 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: Sep 1, 2020, 11:09 AM CDT (16:09 UTC)
Expired: Sep 1, 2020, 2:45 PM CDT
In force: 4 hr
Issued by: NWS Little Rock, AR
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Logan County, AR, Montgomery County, AR, Polk County, AR, Scott County, AR, Yell County, AR

The radar

The Western Arkansas radar (KSRX), 72 km from the middle of the area, began a volume at 16:11 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

Springfield, MO (KSGF), launched 12:00Z, 4.2 hours before the alert went out and 231 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: 38 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 987 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: -22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Sep 1, 6:19 AM CDT, 4 hours 50 minutes earlier.

Area forecast discussion, Sep 1, 6:19 AM CDT, 4 hours 50 minutes before

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Hazardous weather outlook, Sep 1, 3:02 AM CDT, 8 hours 7 minutes before

Hazardous Weather Outlook
National Weather Service Little Rock AR
302 AM CDT Tue Sep 1 2020

ARZ003>008-012>017-021>025-030>034-037>047-052>057-062>069-020815-
Boone-Marion-Baxter-Fulton-Sharp-Randolph-Newton-Searcy-Stone-
Izard-Independence-Lawrence-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-
302 AM CDT Tue Sep 1 2020

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

.DAY ONE...Tonight

Tuesday, widespread rain and thunderstorms will persist over
western and central Arkansas. Excessive soil moisture content
across western and southwestern Arkansas has left the region
extremely vulnerable to flash flooding, prompting the continuation
of the flash flood watch. Heavy rainfall associated with
thunderstorms through Tuesday could bring another 2+ inches to
the region, and pose a significant flash flooding threat.

.DAYS TWO THROUGH SEVEN...Wednesday Through Monday

Scattered to numerous showers and thunderstorms will continue
on Wednesday, especially in northern and western sections of the
state. One to more than two inches of rain could occur in the
north and west. Additional flash flooding is possible, especially
in portions of the Ouachita Mountains where the ground is
nearly saturated.

Precipitation will build to the south on Thursday, and will not
tend to be as widespread and heavy. Drier air will arrive from the
north on Friday, with rain mostly ending through the weekend.

.Spotter Information Statement...

Spotter activation will not be needed.

&&

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

232/46

In the hours before

Local storm report, Sep 1, 9:57 AM CDT, 1 hour 12 minutes before

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Local storm report, Sep 1, 10:03 AM CDT, 1 hour 6 minutes before

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Local storm report, Sep 1, 10:10 AM CDT, 59 minutes before

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Local storm report, Sep 1, 10:14 AM CDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1014 AM CDT TUE SEP 01 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0930 AM     FLASH FLOOD      MOUNT IDA               34.55N  93.63W
09/01/2020                   MONTGOMERY         AR   LAW ENFORCEMENT

            REPORTS OF PARTS OF HIGHWAY 270, 27, AND 88 ARE FLOODED
            IN MONTGOMERY COUNTY.

&&

EVENT NUMBER LZK2000516

TRS

Local storm report, Sep 1, 10:53 AM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1053 AM CDT TUE SEP 01 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1045 AM     FLASH FLOOD      WALDRON                 34.90N  94.09W
09/01/2020                   SCOTT              AR   LAW ENFORCEMENT

            WATER RESCUE ALONG HIGHWAY 248W IN SCOTT COUNTY

&&

EVENT NUMBER LZK2000517

TRS

Local storm report, Sep 1, 11:00 AM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1100 AM CDT TUE SEP 01 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1000 AM     FLASH FLOOD      WALNUT RIDGE            36.07N  90.96W
09/01/2020                   LAWRENCE           AR   EMERGENCY MNGR

            SOME STREETS IN AND NEAR WALNUT RIDGE INUNDATED. WATER
            HAS SINCE RECEDED.

&&

EVENT NUMBER LZK2000518

COOPER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 7:57 PM CDT	River Flood Warning	LZK	Clark, Hot Spring	13 hr
Sep 1, 2:39 AM CDT	Flash Flood Warning	LZK	Johnson, Logan, Scott	6 hr
Sep 1, 4:18 AM CDT	Flash Flood Warning	LZK	Johnson, Logan, Newton, Pope, Scott, Yell	5 hr
Sep 1, 5:02 AM CDT	Flash Flood Warning	LZK	Montgomery, Polk, Scott	3 hr
Sep 1, 5:08 AM CDT	Special Weather Statement	LZK	Johnson, Pope, Yell	52 min
Sep 1, 6:06 AM CDT	Special Weather Statement	LZK	Perry	39 min
Sep 1, 6:30 AM CDT	Special Weather Statement	LZK	Garland, Montgomery	45 min
Sep 1, 7:10 AM CDT	Special Weather Statement	LZK	Hot Spring, Saline	35 min
Sep 1, 7:13 AM CDT	Flash Flood Warning Considerable damage threat	LZK	Garland, Hot Spring, Montgomery	4 hr
Sep 1, 7:53 AM CDT	Flash Flood Warning Considerable damage threat	LZK	Montgomery, Perry, Polk, Scott, Yell	3 hr
Sep 1, 8:21 AM CDT	Flash Flood Warning	LZK	Izard, Sharp	3 hr
Sep 1, 8:54 AM CDT	Flash Flood Warning	LZK	Lawrence, Randolph	2 hr
Sep 1, 9:03 AM CDT	Flash Flood Warning Considerable damage threat	LZK	Logan, Yell	2 hr
Sep 1, 9:16 AM CDT	Flash Flood Warning	LZK	Cleburne, Independence, Lawrence, Sharp, Stone	2 hr
Sep 1, 9:46 AM CDT	Flash Flood Warning	LZK	Conway, Johnson, Logan, Pope, Searcy, Stone and 2 more	5 hr
Sep 1, 12:35 PM CDT	Special Weather Statement	LZK	Perry	25 min
Sep 1, 12:43 PM CDT	River Flood Warning	LZK	Perry	55 hr
Sep 1, 12:56 PM CDT	Severe Thunderstorm Warning	LZK	Montgomery, Polk, Scott	49 min
Sep 1, 1:36 PM CDT	Severe Thunderstorm Warning	LZK	Montgomery, Pike, Polk	39 min
Sep 1, 1:49 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Conway, Faulkner, Van Buren, White	41 min
Sep 1, 1:56 PM CDT	Tornado Warning	LZK	Conway, Faulkner, Perry	34 min
Sep 1, 2:25 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Pike	50 min
Sep 1, 2:27 PM CDT	Tornado Warning	LZK	Cleburne, Faulkner, Van Buren, White	33 min
Sep 1, 2:48 PM CDT	Areal Flood Advisory	LZK	Garland, Johnson, Logan, Montgomery, Perry, Polk and 3 more	10 hr
Sep 1, 2:55 PM CDT	Tornado Warning	LZK	Cleburne, White	50 min
Sep 1, 2:56 PM CDT	Severe Thunderstorm Warning	LZK	Grant, Hot Spring, Jefferson, Pulaski, Saline	49 min
Sep 1, 3:30 PM CDT	Tornado Warning	LZK	Cleburne, Independence, Jackson, White	45 min
Sep 1, 3:35 PM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Jefferson, Lonoke	40 min
Sep 1, 3:39 PM CDT	Severe Thunderstorm Warning	LZK	Grant, Jefferson, Lonoke, Pulaski, Saline	51 min
Sep 1, 3:48 PM CDT	Special Weather Statement	LZK	Pulaski, White	42 min
Sep 1, 4:10 PM CDT	Severe Thunderstorm Warning	LZK	Independence, Jackson	50 min
Sep 1, 4:13 PM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Lonoke, Prairie	32 min
Sep 1, 4:18 PM CDT	Special Weather Statement	LZK	Arkansas	27 min
Sep 1, 4:25 PM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Monroe	50 min
Sep 1, 4:30 PM CDT	Severe Thunderstorm Warning	LZK	Jackson, White, Woodruff	45 min
Sep 1, 4:56 PM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Desha, Jefferson, Lincoln	34 min
Sep 1, 5:10 PM CDT	Special Weather Statement	LZK	Jefferson	50 min
Sep 1, 5:11 PM CDT	Special Weather Statement	LZK	Cleveland, Lincoln	49 min
Sep 1, 5:13 PM CDT	Special Weather Statement	LZK	Jackson	47 min
Sep 1, 5:14 PM CDT	Special Weather Statement	LZK	Prairie	46 min

Nearby

Flash Flood Warnings in Arkansas, 2020 Every flash flood warning in 2020

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.