Alert archive / Arkansas / Flash Flood Warnings in 2018

Flash Flood Warning 47, NWS Little Rock, AR

May 16, 2018Johnson County, Arkansas

NWS Little Rock, AR issued this flash flood warning at May 16, 2018, 1:15 PM CDT for Johnson County, Arkansas. It was in force for 2 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
May 16, 2018, 1:15 PM CDT (18:15 UTC)
Expired
May 16, 2018, 3:15 PM CDT
In force
2 hr
Issued by
NWS Little Rock, AR
Area
Storm-based polygon
Flood severity
None

County Johnson County, AR

The radar

The Western Arkansas radar (KSRX), 87 km from the middle of the area, began a volume at 18:16 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, 6.3 hours before the alert went out and 151 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, Springfield, MO at 12:00Z on 2018-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1078 joules per kilogram.LCLLFCEL10008507005003002001001 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, Springfield, MO at 12:00Z on 2018-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 square meters per square second.193958Sfc1 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
1078 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
668 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
16 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 May 16, 12:11 PM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, May 16, 12:11 PM CDT, 1 hour 4 minutes before
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Hazardous weather outlook, May 16, 12:45 PM CDT, 30 minutes before
Hazardous Weather Outlook...UPDATED
National Weather Service Little Rock AR
1245 PM CDT Wed May 16 2018

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-171745-
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-
1245 PM CDT Wed May 16 2018

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

.DAY ONE...Through Tonight

Isolated strong to severe thunderstorms are possible into tonight,
primarily over the western, central, and southern portions of
Arkansas. Strong winds and hail will be the primary threats. Some
of the stronger storms will also be capable of producing localized
heavy rainfall.

.DAYS TWO THROUGH SEVEN...Thursday Through Tuesday

Isolated to scattered thunderstorms will be in the forecast from
Thursday through the early part of next week. Although widespread
severe weather is not expected, locally strong winds and isolated
heavy rainfall may still be seen with some of the stronger storms.

.Spotter Information Statement...

Spotter activation is not anticipated today.

&&

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

In the hours before

Special weather statement, May 16, 11:52 AM CDT, 1 hour 23 minutes before
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Special weather statement, May 16, 12:29 PM CDT, 46 minutes before
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Special weather statement, May 16, 12:37 PM CDT, 38 minutes before
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Special weather statement, May 16, 1:03 PM CDT, 12 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 11:52 AM CDTSpecial Weather StatementLZKLogan38 min
May 16, 12:29 PM CDTSpecial Weather StatementLZKLogan31 min
May 16, 12:37 PM CDTSpecial Weather StatementLZKJohnson38 min
May 16, 1:03 PM CDTSpecial Weather StatementLZKJohnson27 min
May 16, 1:19 PM CDTSpecial Weather StatementLZKJohnson41 min
May 16, 2:04 PM CDTSpecial Weather StatementLZKPope41 min
May 16, 2:18 PM CDTSevere Thunderstorm WarningLZKJohnson, Newton, Pope27 min
May 16, 2:30 PM CDTSpecial Weather StatementLZKConway45 min
May 16, 2:41 PM CDTSpecial Weather StatementLZKMontgomery49 min
May 16, 3:08 PM CDTSpecial Weather StatementLZKGarland37 min
May 16, 3:12 PM CDTSpecial Weather StatementLZKFaulkner33 min
May 16, 3:30 PM CDTSpecial Weather StatementLZKConway30 min
May 16, 3:41 PM CDTSevere Thunderstorm WarningLZKFaulkner34 min
May 16, 3:55 PM CDTSpecial Weather StatementLZKConway35 min
May 16, 4:05 PM CDTSpecial Weather StatementLZKConway40 min
May 16, 4:09 PM CDTSpecial Weather StatementLZKBoone51 min
May 16, 4:12 PM CDTSpecial Weather StatementLZKGarland33 min
May 16, 4:44 PM CDTSpecial Weather StatementLZKGarland31 min
May 16, 4:46 PM CDTSpecial Weather StatementLZKBoone44 min
May 16, 4:53 PM CDTFlash Flood WarningLZKGarland, Hot Spring2 hr
May 16, 5:01 PM CDTSpecial Weather StatementLZKClark44 min
May 16, 5:06 PM CDTSevere Thunderstorm WarningLZKGarland, Hot Spring39 min
May 16, 5:35 PM CDTSpecial Weather StatementLZKDallas40 min
May 16, 5:38 PM CDTSpecial Weather StatementLZKSaline37 min
May 16, 5:56 PM CDTSpecial Weather StatementLZKGrant34 min
May 16, 6:17 PM CDTSpecial Weather StatementLZKLonoke28 min
May 16, 6:35 PM CDTSpecial Weather StatementLZKDallas25 min
May 16, 6:48 PM CDTSevere Thunderstorm WarningLZKCalhoun, Cleveland, Dallas, Ouachita42 min
May 16, 6:54 PM CDTSevere Thunderstorm WarningLZKCalhoun, Ouachita36 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.