Alert archive / Arkansas / Severe Thunderstorm Watches in 2017

Severe Thunderstorm Watch 367

June 23, 201757 counties in Arkansas; 15 counties in Mississippi

The Storm Prediction Center issued this severe thunderstorm watch at Jun 23, 2017, 2:04 PM CDT for 57 counties in Arkansas; 15 counties in Mississippi. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 23, 2017, 2:04 PM CDT (19:04 UTC)
Expired
Jun 23, 2017, 8:27 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 72 counties

Arkansas County, AR, Baxter County, AR, Boone County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Clay County, AR, Cleburne County, AR, Cleveland County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hot Spring County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Johnson County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Logan County, AR, Lonoke County, AR, Marion County, AR, Mississippi County, AR, Monroe County, AR, Montgomery County, AR, Newton County, AR, Ouachita County, AR, Perry County, AR, Phillips County, AR, Pike County, AR, Poinsett County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Benton County, MS, Calhoun County, MS, Coahoma County, MS, DeSoto County, MS, Lafayette County, MS, Marshall County, MS, Panola County, MS, Pontotoc County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Union County, MS, Yalobusha County, MS

The radar

The Little Rock radar (KLZK), 78 km from the middle of the area, began a volume at 19:04 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
10%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
20%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

27 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 23, 2:11 PM CDTSevere Thunderstorm WarningLZKBaxter, Fulton, Izard49 min
Jun 23, 2:16 PM CDTSevere Thunderstorm WarningLZKBaxter, Izard, Marion29 min
Jun 23, 2:23 PM CDTSevere Thunderstorm WarningLZKNewton37 min
Jun 23, 2:24 PM CDTSevere Thunderstorm WarningLZKBaxter, Marion, Searcy36 min
Jun 23, 2:41 PM CDTSevere Thunderstorm WarningLZKIndependence, Izard, Sharp, Stone49 min
Jun 23, 2:50 PM CDTSevere Thunderstorm WarningLZKJohnson, Newton, Pope40 min
Jun 23, 3:00 PM CDTSevere Thunderstorm WarningLZKFulton, Sharp45 min
Jun 23, 3:14 PM CDTSevere Thunderstorm WarningMEGLawrence, Randolph61 min
Jun 23, 3:17 PM CDTSevere Thunderstorm WarningLZKCleburne, Independence, Jackson, Stone, White43 min
Jun 23, 3:22 PM CDTSevere Thunderstorm WarningLZKCleburne, Conway, Faulkner, Van Buren, White38 min
Jun 23, 3:31 PM CDTSevere Thunderstorm WarningLZKIndependence, Jackson, Sharp29 min
Jun 23, 3:33 PM CDTSevere Thunderstorm WarningLZKJohnson27 min
Jun 23, 3:34 PM CDTSevere Thunderstorm WarningMEGRandolph41 min
Jun 23, 4:08 PM CDTSevere Thunderstorm WarningMEGCraighead, Greene, Lawrence, Randolph52 min
Jun 23, 4:37 PM CDTSevere Thunderstorm WarningMEGCraighead, Poinsett38 min
Jun 23, 4:39 PM CDTSevere Thunderstorm WarningLZKFaulkner, Perry, Pulaski, Saline51 min
Jun 23, 4:42 PM CDTFlash Flood WarningMEGLawrence, Randolph3 hr
Jun 23, 4:51 PM CDTSevere Thunderstorm WarningMEGCraighead, Crittenden, Cross, Mississippi, Poinsett39 min
Jun 23, 4:54 PM CDTSevere Thunderstorm WarningMEGCraighead, Greene, Mississippi34 min
Jun 23, 5:04 PM CDTSevere Thunderstorm WarningLZKGarland, Hot Spring, Saline41 min
Jun 23, 5:04 PM CDTSevere Thunderstorm WarningLZKLogan, Scott26 min
Jun 23, 5:20 PM CDTFlash Flood WarningMEGCraighead, Greene3 hr
Jun 23, 5:21 PM CDTSevere Thunderstorm WarningMEGCrittenden, Mississippi54 min
Jun 23, 5:26 PM CDTSevere Thunderstorm WarningLZKGrant, Saline37 min
Jun 23, 5:48 PM CDTSevere Thunderstorm WarningLZKScott27 min
Jun 23, 6:43 PM CDTFlash Flood WarningLZKGarland, Grant, Hot Spring3 hr
Jun 23, 7:17 PM CDTSevere Thunderstorm WarningLZKMontgomery, Pike25 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 7.1 hours before the alert went out and 208 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 2017-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1414 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 2017-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
1414 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
794 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
44 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

The text

As transmitted.

455 
WWUS20 KWNS 231901
SEL7  
SPC WW 231901
ARZ000-MOZ000-240200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 367
NWS Storm Prediction Center Norman OK
205 PM CDT Fri Jun 23 2017

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Arkansas
  Far southern Missouri

* Effective this Friday afternoon and evening from 205 PM until
  900 PM CDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph possible
  Isolated large hail events to 1.5 inches in diameter possible

SUMMARY...A cluster of storms will continue to move southeastward
across the region into an increasing warm and unstable air mass this
afternoon. Bouts of damaging winds will the most common hazard aside
from some hail.

The severe thunderstorm watch area is approximately along and 75
statute miles north and south of a line from 30 miles west southwest
of Russellville AR to 30 miles east southeast of Jonesboro AR. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU7).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 365...WW 366...

AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
31035.

...Guyer

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 22, 8:57 PM CDTMesoscale DiscussionSPCChicot63 min
Jun 23, 12:22 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clark, Cleburne and 37 more2 hr
Jun 23, 3:32 PM CDTMesoscale DiscussionSPCCrawford, Sebastian118 min
Jun 23, 4:35 PM CDTMesoscale DiscussionSPCArkansas, Conway, Craighead, Crittenden, Cross, Faulkner and 20 more85 min
Jun 23, 10:54 AM CDTMesoscale DiscussionSPCChickasaw, Choctaw, Clay, Itawamba, Kemper, Leake and 9 more96 min
Jun 23, 12:16 PM CDTTornado WatchSPCLowndes, Noxubee, Oktibbeha, Winston6 hr
Jun 23, 3:17 PM CDTMesoscale DiscussionSPCLauderdale118 min

Nearby

Severe Thunderstorm Watches in Arkansas, 2017Severe Thunderstorm Watches in Mississippi, 2017Every severe thunderstorm watch 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.