Alert archive / Arkansas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 203, NWS Little Rock, AR

May 27, 2017Boone County, Marion County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at May 27, 2017, 12:57 AM CDT for Boone County, Marion County, Arkansas. It was in force for 48 min. 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 27, 2017, 12:57 AM CDT (05:57 UTC)
Expired
May 27, 2017, 1:45 AM CDT
In force
48 min
Issued by
NWS Little Rock, AR
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Boone County, AR, Marion County, AR

The radar

The Springfield radar (KSGF), 115 km from the middle of the area, began a volume at 05:58 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 27, 12:06 AM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 6.0 hours before the alert went out and 106 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 00:00Z on 2017-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2596 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 00:00Z on 2017-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.1939587897Sfc1 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
2596 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
942 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
1.4
Supercell composite
6.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 26, 6:09 PM CDT, 6 hours 48 minutes earlier.

Area forecast discussion, May 26, 6:09 PM CDT, 6 hours 48 minutes before
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Hazardous weather outlook, May 26, 2:59 PM CDT, 9 hours 58 minutes before
Hazardous Weather Outlook...Updated
National Weather Service Little Rock AR
259 PM CDT Fri May 26 2017

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-271000-
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-
259 PM CDT Fri May 26 2017

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

.DAY ONE...Today and Tonight

No hazardous weather is expected through tonight.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

There is a Moderate Risk of severe thunderstorms in the north
Saturday, likely Saturday night. There is an Enhanced Risk
surrounding the Moderate Risk that extends into central and
southwest Arkansas.Severe thunderstorms will become possible
Saturday afternoon and early evening across the
northern/northwestern half of Arkansas. While uncertainty exists on
whether storms can form and become mature...any storm that does form
will have the potential to produce very large hail and damaging
winds. These storms may also be capable of producing a tornado or
two.

As time goes on late Saturday evening into the early morning hours
on Sunday...the potential for seeing more organized thunderstorms
will increase as a cold front drops south towards the state. These
thunderstorms could also become severe...with damaging winds
possible with the strongest storms as this activity looks to form
into a larger...more organized line or complex. Large hail and a few
brief tornadoes will also be possible as this line or complex moves
south across northern Arkansas. Some locally heavy rain may also be
seen...resulting in an isolated flash flood threat.

By Sunday morning...the threat for seeing severe weather will have
decreased...but the cold front will still be dropping south across
the state. Additional thunderstorms will be possible Sunday
afternoon and evening across the southern/southeastern half of the
state as the cold front pushes through this region of Arkansas.
Additional strong to severe thunderstorms may again be possible
during this period.

Calmer and drier conditions will be seen for Monday into Tuesday.
The threat for hazardous weather will then become low.

.Spotter Information Statement...

Spotter activation is not anticipated at this time. However, please
monitor forecast trends over the holiday weekend.

&&

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

44/62/51

The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 1:37 AM CDTSevere Thunderstorm WarningLZKBoone, Marion38 min
May 27, 2:11 AM CDTSevere Thunderstorm WarningLZKBaxter, Boone, Marion49 min
May 27, 2:25 AM CDTSevere Thunderstorm WarningLZKBaxter, Fulton, Izard, Marion50 min
May 27, 3:07 AM CDTSevere Thunderstorm WarningLZKBaxter, Fulton, Izard, Marion, Sharp38 min
May 27, 3:10 AM CDTFlash Flood WarningLZKBaxter, Boone, Marion3 hr
May 27, 3:38 AM CDTSevere Thunderstorm WarningLZKBaxter, Fulton, Izard, Sharp52 min
May 27, 4:15 AM CDTSevere Thunderstorm WarningLZKSharp30 min
May 27, 4:36 AM CDTSpecial Weather StatementLZKIzard, Sharp39 min
May 27, 5:17 AM CDTSpecial Weather StatementLZKLawrence28 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2017Every severe thunderstorm warning in 2017

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.