Alert archive / Arkansas / Flash Flood Warnings in 2020

Flash Flood Warning 60, NWS Little Rock, AR

August 11, 20205 counties in Arkansas

NWS Little Rock, AR issued this flash flood warning at Aug 11, 2020, 3:30 PM CDT for 5 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: Aug 11, 2020, 3:30 PM CDT (20:30 UTC)
Expired: Aug 11, 2020, 6:13 PM CDT
In force: 3 hr
Issued by: NWS Little Rock, AR
Area: Storm-based polygon
Flood severity: None

Counties Faulkner County, AR, Lonoke County, AR, Prairie County, AR, Pulaski County, AR, White County, AR

The radar

The Little Rock radar (KLZK), 30 km from the middle of the area, began a volume at 20:33 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 12:00Z, 8.5 hours before the alert went out and 184 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: 710 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1429 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 46 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 11, 2:31 PM CDT, 59 minutes earlier.

Area forecast discussion, Aug 11, 2:31 PM CDT, 59 minutes before

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Hazardous weather outlook, Aug 11, 4:15 AM CDT, 11 hours 15 minutes before

Hazardous Weather Outlook
National Weather Service Little Rock AR
415 AM CDT Tue Aug 11 2020

ARZ003>008-012>017-021>025-030>034-037>047-052>057-062>069-121000-
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-
415 AM CDT Tue Aug 11 2020

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

.DAY ONE...Today and Tonight

Showers and thunderstorms will be possible late this morning and
into the evening hours over the majority of the state. Some storms
may be strong to possibly severe with the primary hazard being
strong winds.

Unseasonably hot conditions will continue this afternoon with
high temperatures in the lower to mid 90s for most locations.
Widespread heat index values in excess of 100 degrees are expected
with a few areas possibly reaching 105 degrees for a brief period
of time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Hot and humid conditions will continue through the end of the week,
with chances for mainly afternoon showers and thunderstorms. While
organized severe is not anticipated, a few stronger storms can not
be ruled out. the primary concern with any strong storm would be
gusty winds.

.Spotter Information Statement...

Spotter activation will not be needed.

&&

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

In the hours before

Special weather statement, Aug 11, 11:44 AM CDT, 3 hours 46 minutes before

Special Weather Statement
National Weather Service Little Rock AR
1144 AM CDT Tue Aug 11 2020

ARZ025-033-034-111730-
White AR-Woodruff AR-Jackson AR-
1144 AM CDT Tue Aug 11 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL WOODRUFF...SOUTHERN
JACKSON AND EASTERN WHITE COUNTIES UNTIL 1230 PM CDT...

At 1143 AM CDT, Doppler radar was tracking a strong thunderstorm 8
miles west of Tupelo, or 9 miles north of Augusta, moving northeast
at 15 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Newport...                        Tupelo...
Algoa...                          Beedeville...
Amagon...                         Weldon...
Blackville...                     Olyphant...
Shoffner...                       Ingleside...
Fitzhugh...                       Erwin...
Possum Grape...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3532 9134 3547 9149 3553 9140 3553 9137
      3555 9137 3566 9120 3549 9104 3546 9104
TIME...MOT...LOC 1643Z 245DEG 12KT 3543 9137

SHELTON

Local storm report, Aug 11, 2:05 PM CDT, 1 hour 25 minutes before

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Special weather statement, Aug 11, 2:36 PM CDT, 54 minutes before

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Special weather statement, Aug 11, 2:40 PM CDT, 50 minutes before

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Special weather statement, Aug 11, 3:04 PM CDT, 26 minutes before

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Special weather statement, Aug 11, 3:16 PM CDT, 14 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 11, 8:00 AM CDT	Special Weather Statement	LZK	Stone	45 min
Aug 11, 11:13 AM CDT	Special Weather Statement	LZK	Scott	47 min
Aug 11, 11:28 AM CDT	Special Weather Statement	LZK	Boone	47 min
Aug 11, 11:42 AM CDT	Special Weather Statement	LZK	Independence	48 min
Aug 11, 11:44 AM CDT	Special Weather Statement	LZK	Jackson	46 min
Aug 11, 12:03 PM CDT	Severe Thunderstorm Warning	LZK	Boone, Marion, Newton	30 min
Aug 11, 12:27 PM CDT	Severe Thunderstorm Warning	LZK	Logan, Yell	48 min
Aug 11, 1:35 PM CDT	Severe Thunderstorm Warning	LZK	Newton, Pope, Searcy, Van Buren	25 min
Aug 11, 2:03 PM CDT	Flash Flood Warning	LZK	Newton, Searcy	3 hr
Aug 11, 2:36 PM CDT	Special Weather Statement	LZK	Conway	24 min
Aug 11, 2:40 PM CDT	Special Weather Statement	LZK	Cleburne, Van Buren	35 min
Aug 11, 3:04 PM CDT	Special Weather Statement	LZK	Faulkner	26 min
Aug 11, 3:16 PM CDT	Special Weather Statement	LZK	Prairie	44 min
Aug 11, 3:36 PM CDT	Special Weather Statement	LZK	Pulaski	24 min
Aug 11, 4:10 PM CDT	Severe Thunderstorm Warning	LZK	Grant, Pulaski, Saline	35 min
Aug 11, 4:24 PM CDT	Severe Thunderstorm Warning	LZK	Grant, Hot Spring, Saline	36 min
Aug 11, 4:49 PM CDT	Flash Flood Warning	LZK	Monroe, Prairie	3 hr
Aug 11, 5:29 PM CDT	Special Weather Statement	LZK	Jefferson	31 min
Aug 11, 6:04 PM CDT	Special Weather Statement	LZK	Arkansas	41 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.