Alert archive / Arkansas / Flash Flood Warnings in 2018

Flash Flood Warning 21, NWS Little Rock, AR

February 24, 201811 counties in Arkansas

NWS Little Rock, AR issued this flash flood warning at Feb 24, 2018, 3:04 PM CST for 11 counties in Arkansas. It was in force for 5 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Feb 24, 2018, 3:04 PM CST (21:04 UTC)
Expired
Feb 24, 2018, 8:00 PM CST
In force
5 hr
Issued by
NWS Little Rock, AR
Area
Storm-based polygon
Flood severity
None

Counties Faulkner County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Jefferson County, AR, Lonoke County, AR, Perry County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, White County, AR

The radar

The Little Rock radar (KLZK), 25 km from the middle of the area, began a volume at 21:06 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.

What was reported inside it

TimeReportWhereRemark
Feb 24, 3:41 PM CSTFLASH FLOOD2 Wsw Tull, ARSEVERAL ROAD REPORTED UNDERWATER
Feb 24, 4:18 PM CSTFLASH FLOOD1 Ene Indian Head Lake, ARWATER REPORTED TO BE OVER ROADWAYS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 9.1 hours before the alert went out and 223 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-pSkew-T log-p diagram, Little Rock, AR at 12:00Z on 2018-02-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 42 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 12:00Z on 2018-02-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
42 J/kg
Mixed-layer CIN
-186 J/kg
Mixed-layer LCL
568 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
196 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

932 
WGUS54 KLZK 242104
FFWLZK
ARC045-051-053-059-069-085-105-117-119-125-145-250000-
/O.NEW.KLZK.FF.W.0021.180224T2104Z-180225T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Little Rock AR
304 PM CST SAT FEB 24 2018

The National Weather Service in Little Rock has issued a

* Flash Flood Warning for...
  Northern Prairie County in central Arkansas...
  Southeastern Perry County in central Arkansas...
  Lonoke County in central Arkansas...
  Grant County in central Arkansas...
  Faulkner County in central Arkansas...
  Northwestern Jefferson County in southeastern Arkansas...
  White County in central Arkansas...
  Eastern Garland County in central Arkansas...
  Saline County in central Arkansas...
  Pulaski County in central Arkansas...
  Eastern Hot Spring County in southwestern Arkansas...

* Until 600 PM CST

* At 303 PM CST, Doppler radar indicated thunderstorms producing 
  heavy rain moving into the warned area. Flash flooding is likely 
  to occur!

* Some locations that will experience flooding include...
  Little Rock...                    North Little Rock...
  Conway...                         Hot Springs...
  Benton...                         Sherwood...
  Jacksonville...                   Cabot...
  Searcy...                         West Little Rock...
  Maumelle...                       Bryant...
  Hot Springs Village...            Malvern...
  Downtown Little Rock...           Sheridan...
  Lonoke...                         Des Arc...
  North Little Rock Airport...      Little Rock AFB...

Rainfall amounts of one to two inches are possible in the warned 
area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

&&

LAT...LON 3419 9225 3415 9263 3426 9299 3451 9311
      3478 9307 3535 9212 3534 9155 3496 9144

$$

Cooper
1 follow-up statement
748 
WGUS54 KLZK 242351
FFWLZK
ARC045-051-053-059-069-085-105-117-119-125-145-250200-
/O.EXT.KLZK.FF.W.0021.000000T0000Z-180225T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Little Rock AR
551 PM CST SAT FEB 24 2018

The National Weather Service in Little Rock has extended the

* Flash Flood Warning for...
  Northern Prairie County in central Arkansas...
  Southeastern Perry County in central Arkansas...
  Lonoke County in central Arkansas...
  Grant County in central Arkansas...
  Faulkner County in central Arkansas...
  Northwestern Jefferson County in southeastern Arkansas...
  White County in central Arkansas...
  Eastern Garland County in central Arkansas...
  Saline County in central Arkansas...
  Pulaski County in central Arkansas...
  Eastern Hot Spring County in southwestern Arkansas...

* Until 800 PM CST

* At 551 PM CST, local law enforcement reported high water across 
  the warned area. Up to two inches of rain have already fallen. 
  Flash flooding is already occurring.

* Some locations that will experience flooding include...
  Little Rock...                    North Little Rock...
  Conway...                         Hot Springs...
  Benton...                         Sherwood...
  Jacksonville...                   Cabot...
  Searcy...                         West Little Rock...
  Maumelle...                       Bryant...
  Hot Springs Village...            Malvern...
  Downtown Little Rock...           Sheridan...
  Lonoke...                         Des Arc...
  North Little Rock Airport...      Little Rock AFB...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

&&

LAT...LON 3419 9225 3415 9263 3426 9299 3451 9311
      3478 9307 3535 9212 3534 9155 3496 9144

$$

Cooper

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 24, 10:06 AM CSTDense Fog AdvisoryLZKBaxter, Cleburne, Conway, Faulkner, Fulton, Independence and 6 more3 hr
Feb 24, 10:27 AM CSTAreal Flood WarningLZKFaulkner24 hr
Feb 24, 10:44 AM CSTSpecial Weather StatementLZKScott46 min
Feb 24, 10:48 AM CSTTornado WarningLZKPolk, Scott27 min
Feb 24, 12:38 PM CSTSevere Thunderstorm WarningLZKLogan, Polk, Scott52 min
Feb 24, 12:56 PM CSTSevere Thunderstorm WarningLZKPolk34 min
Feb 24, 1:00 PM CSTSpecial Weather StatementLZKJohnson45 min
Feb 24, 1:13 PM CSTTornado WarningLZKLogan, Yell8 min
Feb 24, 1:24 PM CSTSevere Thunderstorm WarningLZKLogan, Pope, Scott, Yell51 min
Feb 24, 1:32 PM CSTSevere Thunderstorm WarningLZKMontgomery, Pike, Polk, Scott, Yell43 min
Feb 24, 1:40 PM CSTSpecial Weather StatementLZKPope, Searcy50 min
Feb 24, 2:06 PM CSTSevere Thunderstorm WarningLZKClark, Garland, Hot Spring, Montgomery, Perry, Pike and 2 more39 min
Feb 24, 2:10 PM CSTSevere Thunderstorm WarningLZKConway, Perry, Pope, Van Buren, Yell50 min
Feb 24, 2:16 PM CSTSevere Thunderstorm WarningLZKBaxter, Fulton, Izard, Marion, Searcy, Stone44 min
Feb 24, 2:37 PM CSTSevere Thunderstorm WarningLZKBaxter, Fulton38 min
Feb 24, 2:42 PM CSTSevere Thunderstorm WarningLZKClark, Dallas, Faulkner, Garland, Grant, Hot Spring and 6 more48 min
Feb 24, 2:56 PM CSTSevere Thunderstorm WarningLZKBaxter, Fulton, Independence, Izard, Sharp, Stone and 1 more49 min
Feb 24, 2:58 PM CSTSevere Thunderstorm WarningLZKConway, Faulkner, Perry, Van Buren47 min
Feb 24, 3:10 PM CSTFlash Flood WarningLZKCleburne, Conway, Faulkner, Perry, Pope, Saline and 5 more5 hr
Feb 24, 3:22 PM CSTTornado WarningLZKCleburne, Independence, Izard, Stone, Van Buren23 min
Feb 24, 3:25 PM CSTSevere Thunderstorm WarningLZKFaulkner, Garland, Grant, Lonoke, Perry, Pulaski and 2 more50 min
Feb 24, 3:26 PM CSTFlash Flood WarningLZKClark, Cleveland, Dallas, Garland, Grant, Hot Spring and 1 more5 hr
Feb 24, 3:33 PM CSTSevere Thunderstorm WarningLZKClark, Dallas, Grant, Hot Spring42 min
Feb 24, 3:37 PM CSTFlash Flood WarningLZKBaxter, Boone, Fulton, Independence, Izard, Jackson and 5 more4 hr
Feb 24, 3:42 PM CSTFlash Flood WarningLZKIndependence, Jackson, Monroe, Prairie, White, Woodruff5 hr
Feb 24, 3:43 PM CSTSevere Thunderstorm WarningLZKCleburne, Faulkner, White47 min
Feb 24, 4:01 PM CSTFlash Flood WarningLZKCalhoun, Dallas, Ouachita6 hr
Feb 24, 4:07 PM CSTFlash Flood WarningLZKArkansas, Bradley, Calhoun, Cleveland, Dallas, Drew and 6 more6 hr
Feb 24, 4:14 PM CSTSevere Thunderstorm WarningLZKLonoke, Prairie, Pulaski46 min
Feb 24, 4:14 PM CSTSevere Thunderstorm WarningLZKCleburne, Independence, Jackson, Sharp, Stone, White and 1 more46 min
Feb 24, 4:44 PM CSTFlash Flood WarningLZKArkansas, Desha, Drew, Jefferson, Lincoln, Monroe6 hr
Feb 24, 4:54 PM CSTSpecial Weather StatementLZKWoodruff36 min
Feb 24, 4:59 PM CSTSevere Thunderstorm WarningLZKMonroe, Prairie, Woodruff31 min
Feb 24, 5:02 PM CSTSpecial Weather StatementLZKJackson13 min
Feb 24, 5:06 PM CSTSpecial Weather StatementLZKArkansas, Jefferson, Monroe39 min
Feb 24, 5:42 PM CSTSpecial Weather StatementLZKArkansas, Monroe48 min
Feb 24, 5:52 PM CSTSevere Thunderstorm WarningLZKArkansas, Monroe, Prairie38 min

Nearby

Flash Flood Warnings in Arkansas, 2018Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.