Alert archive / Arkansas / Flash Flood Warnings in 2015

Flash Flood Warning 34, NWS Little Rock, AR

May 20, 2015Polk County, Scott County, Arkansas

NWS Little Rock, AR issued this flash flood warning at May 20, 2015, 2:56 AM CDT for Polk County, Scott 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: May 20, 2015, 2:56 AM CDT (07:56 UTC)
Expired: May 20, 2015, 6:00 AM CDT
In force: 3 hr
Issued by: NWS Little Rock, AR
Area: Storm-based polygon
Flood severity: None

Counties Polk County, AR, Scott County, AR

The radar

The Western Arkansas radar (KSRX), 71 km from the middle of the area, began a volume at 07:55 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 00:00Z, 7.9 hours before the alert went out and 247 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: 791 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 1207 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

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 May 20, 1:16 AM CDT, 1 hour 40 minutes earlier.

Area forecast discussion, May 20, 1:16 AM CDT, 1 hour 40 minutes before

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Hazardous weather outlook, May 19, 3:15 PM CDT, 11 hours 41 minutes before

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In the hours before

Special weather statement, May 20, 1:54 AM CDT, 1 hour 2 minutes before

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Special weather statement, May 20, 2:38 AM CDT, 18 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
May 20, 1:54 AM CDT	Special Weather Statement	LZK	Logan, Scott	46 min
May 20, 2:38 AM CDT	Special Weather Statement	LZK	Scott, Yell	47 min
May 20, 3:38 AM CDT	Special Weather Statement	LZK	Montgomery, Perry, Yell	47 min
May 20, 4:03 AM CDT	Flash Flood Warning	LZK	Logan, Scott	3 hr
May 20, 4:20 AM CDT	Special Weather Statement	LZK	Garland, Perry	45 min
May 20, 5:01 AM CDT	Special Weather Statement	LZK	Pulaski, Saline	44 min
May 20, 5:38 AM CDT	Special Weather Statement	LZK	Faulkner, Pulaski	47 min
May 20, 5:43 AM CDT	Flash Flood Warning	LZK	Pope, Van Buren	3 hr
May 20, 5:59 AM CDT	Flash Flood Warning	LZK	Garland, Logan, Montgomery, Perry, Polk, Scott and 1 more	3 hr
May 20, 6:14 AM CDT	Flash Flood Warning	LZK	Johnson, Logan, Pope, Scott, Van Buren, Yell	3 hr
May 20, 6:51 AM CDT	Flash Flood Warning	LZK	Grant, Hot Spring, Jefferson, Lonoke, Pulaski, Saline	3 hr
May 20, 8:19 AM CDT	River Flood Warning	LZK	Conway, Perry	8 days
May 20, 8:30 AM CDT	River Flood Warning	LZK	Yell	4 days
May 20, 8:37 AM CDT	River Flood Advisory	LZK	Faulkner, Perry	36 hr
May 20, 9:01 AM CDT	River Flood Warning	LZK	Clark, Hot Spring	4 days
May 20, 9:07 AM CDT	River Flood Warning	LZK	Saline	54 hr
May 20, 4:34 PM CDT	River Flood Advisory	LZK	Jefferson, Lincoln	36 hr

Nearby

Flash Flood Warnings in Arkansas, 2015 Every flash flood warning in 2015

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.