Alert archive / Arkansas / Flash Flood Warnings in 2018

Flash Flood Warning 10, NWS Little Rock, AR

February 21, 2018Hot Spring County, Arkansas

NWS Little Rock, AR issued this flash flood warning at Feb 21, 2018, 5:56 PM CST for Hot Spring County, 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 21, 2018, 5:56 PM CST (23:56 UTC)
Expired
Feb 21, 2018, 9:00 PM CST
In force
3 hr
Issued by
NWS Little Rock, AR
Area
Storm-based polygon
Flood severity
None

County Hot Spring County, AR

The radar

The Little Rock radar (KLZK), 85 km from the middle of the area, began a volume at 23:54 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 12:00Z, 11.9 hours before the alert went out and 218 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, Shreveport, LA at 12:00Z on 2018-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1043 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 12:00Z on 2018-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 151 square meters per square second.19395878Sfc1 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
1043 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
529 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
151 m²/s²
0-3 km storm-relative helicity
175 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.1

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 21, 5:45 PM CST, 11 minutes earlier.

Area forecast discussion, Feb 21, 5:45 PM CST, 11 minutes before
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Hazardous weather outlook, Feb 21, 2:45 PM CST, 3 hours 11 minutes before
Hazardous Weather Outlook...Update
National Weather Service Little Rock AR
245 PM CST Wed Feb 21 2018

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-221100-
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-
245 PM CST Wed Feb 21 2018

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

.DAY ONE...Rest of Today and Tonight

Flood and flash flood watches remain in effect for much of Arkansas.
Areas of rain, heavy at times, and isolated thunderstorms will
continue to affect much of central and southern Arkansas, while
lowering over northern Arkansas. River levels are coming up and
areas of flooding have been reported. Tonight, most of the rain will
be seen over southern and the eastern half of Arkansas.
Precipitation will tend to taper off or become more spotty in the
northwest, also where temperatures will be around freezing some
spotty winter precipitation will be possible. No accumulations are
expected.

In much of the south and east, rain will continue tonight, and be
heavy at times. The threat for flooding will continue. Two to five
plus inches of rain have fallen over much of Arkansas, and one to
two more inches of rain may be seen tonight through Thursday
morning.

.DAYS TWO THROUGH SEVEN...Thursday Through Tuesday

Some rainfall will linger through the morning hours Thursday, mainly
across southeastern portions of the area. Any rain that falls would
likely only worsen expected flooding conditions.

Additional heavy rainfall will return to the forecast by late
Thursday through Sunday morning as the aforementioned front moves
back to the north over the region. Rainfall totals across the state
from Thursday through Sunday morning will likely be in the two to
four inch range for many areas. As a result, the threat for
widespread river and flash flooding will continue to increase
throughout the week and into the weekend.

Severe weather may be possible on Saturday as an upper level storm
system approaches from the west. Even with well above normal
temperatures expected and abundant moisture in place, certain
atmospheric conditions appear to limit the severe weather threat. Be
sure to monitor the latest forecast and outlooks for more
information regarding this severe weather chance.

.Spotter Information Statement...

Flooding will continue to be a concern across Arkansas, and any
significant reports are requested. Otherwise, due to a low severe
weather concern, spotter activation is not anticipated through
Friday. If there are severe storms, they appear most likely this
weekend, and spotter activation may be required.

&&

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

46/67/59

In the hours before

Local storm report, Feb 21, 12:59 PM CST, 4 hours 57 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1259 PM CST WED FEB 21 2018

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

1250 AM     FLOOD            GLENWOOD                34.33N 93.55W
02/21/2018                   PIKE               AR   SOCIAL MEDIA

            WATER WAS OVER THE ROAD NEAR GLENWOOD, OVER A LOW WATER
            CROSSING BRIDGE.

&&

51
Local storm report, Feb 21, 3:45 PM CST, 2 hours 11 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
345 PM CST WED FEB 21 2018

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

1250 PM     FLOOD            GLENWOOD                34.33N 93.55W
02/21/2018                   PIKE               AR   SOCIAL MEDIA

            WATER WAS OVER THE ROAD NEAR GLENWOOD, OVER A LOW WATER
            CROSSING BRIDGE.

&&
CORRECTED TIME

57
Local storm report, Feb 21, 4:15 PM CST, 1 hour 41 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
415 PM CST WED FEB 21 2018

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

0413 PM     FLOOD            BAUXITE                 34.56N  92.52W
02/21/2018                   SALINE             AR   AMATEUR RADIO

            STORM SPOTTER REPORTS WATER FROM HURRICANE CREEK IS
            COVERING SARDIS ROAD NEAR BAUXITE.

&&

EVENT NUMBER LZK1800063

COOPER
Local storm report, Feb 21, 5:15 PM CST, 41 minutes before
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Local storm report, Feb 21, 5:19 PM CST, 37 minutes before
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Local storm report, Feb 21, 5:21 PM CST, 35 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Feb 20, 6:17 PM CSTSpecial Weather StatementLZKGarland, Montgomery43 min
Feb 20, 7:11 PM CSTSpecial Weather StatementLZKConway, Perry, Saline49 min
Feb 20, 8:37 PM CSTSpecial Weather StatementLZKCleburne, Independence, Stone, White38 min
Feb 21, 5:27 AM CSTFlash Flood WarningLZKFaulkner, Garland, Hot Spring, Montgomery, Perry, Pulaski and 1 more7 hr
Feb 21, 6:31 AM CSTFlash Flood WarningLZKHot Spring3 hr
Feb 21, 6:53 AM CSTFlash Flood WarningLZKMontgomery, Polk, Scott3 hr
Feb 21, 7:46 AM CSTRiver Flood WarningLZKYell49 hr
Feb 21, 8:30 AM CSTFlash Flood WarningLZKCleburne, Conway, Faulkner, Lonoke, Perry, Pulaski and 3 more4 hr
Feb 21, 8:46 AM CSTFlash Flood WarningLZKLonoke, Prairie, White3 hr
Feb 21, 9:21 AM CSTFlash Flood WarningLZKHot Spring3 hr
Feb 21, 10:56 AM CSTRiver Flood WarningLZKIndependence, Jackson, Lawrence20 days
Feb 21, 11:01 AM CSTRiver Flood WarningLZKWhite, Woodruff29 days
Feb 21, 11:59 AM CSTAreal Flood WarningLZKClark, Dallas, Faulkner, Garland, Hot Spring, Montgomery and 4 more6 hr
Feb 21, 12:07 PM CSTAreal Flood WarningLZKCleburne, Conway, Faulkner, Independence, Jackson, Lonoke and 7 more6 hr
Feb 21, 12:15 PM CSTFlash Flood WarningLZKHot Spring3 hr
Feb 21, 2:48 PM CSTAreal Flood WarningLZKBradley, Calhoun, Clark, Cleveland, Dallas, Grant and 6 more15 hr
Feb 21, 3:04 PM CSTFlash Flood WarningLZKHot Spring3 hr
Feb 21, 3:55 PM CSTWinter Weather AdvisoryLZKBaxter, Fulton, Izard, Marion, Stone14 hr
Feb 21, 3:57 PM CSTRiver Flood WarningLZKYell5 days
Feb 21, 4:21 PM CSTFlash Flood WarningLZKDesha, Drew, Lincoln3 hr
Feb 21, 5:02 PM CSTAreal Flood WarningLZKArkansas, Desha, Jefferson, Lincoln, Lonoke, Monroe and 3 more118 min
Feb 21, 5:49 PM CSTAreal Flood WarningLZKCleburne, Conway, Faulkner, Independence, Jackson, Lonoke and 6 more12 hr
Feb 21, 5:53 PM CSTAreal Flood WarningLZKClark, Dallas, Garland, Hot Spring, Logan, Montgomery and 6 more6 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.