Alert archive / Arkansas / Tornado Watches in 2019

Tornado Watch 183

May 18, 20194 states

The Storm Prediction Center issued this tornado watch at May 18, 2019, 12:48 PM CDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
May 18, 2019, 12:48 PM CDT (17:48 UTC)
Expired
May 18, 2019, 8:00 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 66 counties

Arkansas County, AR, Baxter County, AR, Boone County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Fulton County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Izard County, AR, Jefferson County, AR, Johnson County, AR, Lafayette County, AR, Lincoln County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Marion County, AR, Miller County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Newton County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sevier County, AR, Stone County, AR, Van Buren County, AR, Yell County, AR, Bossier Parish, LA, Caddo Parish, LA, McCurtain County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Morris County, TX, Red River County, TX, Rusk County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX

The radar

The Western Arkansas radar (KSRX), 160 km from the middle of the area, began a volume at 17:49 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
70%
One or more EF2 to EF5 tornadoes
40%
Ten or more severe wind reports
80%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 18, 1:38 PM CDTSevere Thunderstorm WarningLZKLogan, Polk, Scott52 min
May 18, 1:43 PM CDTSevere Thunderstorm WarningSHVMcCurtain47 min
May 18, 2:09 PM CDTTornado WarningLZKLogan36 min
May 18, 2:25 PM CDTSevere Thunderstorm WarningLZKJohnson, Logan50 min
May 18, 2:32 PM CDTFlash Flood WarningSHVMcCurtain3 hr
May 18, 2:40 PM CDTSevere Thunderstorm WarningSHVLittle River, Sevier50 min
May 18, 2:52 PM CDTSevere Thunderstorm WarningLZKJohnson, Newton53 min
May 18, 3:07 PM CDTSevere Thunderstorm WarningLZKJohnson, Logan, Newton, Pope, Searcy, Van Buren and 1 more53 min
May 18, 3:30 PM CDTSevere Thunderstorm WarningLZKClark, Pike60 min
May 18, 3:36 PM CDTSevere Thunderstorm WarningLZKBoone, Marion, Newton, Searcy54 min
May 18, 3:47 PM CDTSevere Thunderstorm WarningSHVHempstead, Nevada58 min
May 18, 3:51 PM CDTSevere Thunderstorm WarningLZKCleburne, Conway, Faulkner, Pope, Searcy, Stone and 2 more39 min
May 18, 4:05 PM CDTSevere Thunderstorm WarningLZKClark, Garland, Hot Spring, Saline40 min
May 18, 4:21 PM CDTSevere Thunderstorm WarningLZKClark, Dallas, Grant, Hot Spring, Ouachita54 min
May 18, 4:26 PM CDTSevere Thunderstorm WarningSHVFranklin, Smith, Wood49 min
May 18, 4:39 PM CDTTornado WarningLZKDallas, Grant, Hot Spring15 min
May 18, 4:54 PM CDTSevere Thunderstorm WarningSHVCamp, Franklin, Morris, Red River, Titus51 min
May 18, 5:04 PM CDTSevere Thunderstorm WarningLZKCleburne, Faulkner, White41 min
May 18, 5:06 PM CDTSevere Thunderstorm WarningSHVCherokee, Smith54 min
May 18, 5:09 PM CDTSevere Thunderstorm WarningLZKBradley, Calhoun, Cleveland, Dallas, Grant, Jefferson66 min
May 18, 5:12 PM CDTSevere Thunderstorm WarningSHVSmith, Upshur, Wood63 min
May 18, 5:23 PM CDTTornado WarningSHVSmith52 min
May 18, 5:24 PM CDTSevere Thunderstorm WarningSHVBowie, Cass36 min
May 18, 5:32 PM CDTSevere Thunderstorm WarningLZKArkansas, Jefferson, Lonoke, Prairie43 min
May 18, 5:42 PM CDTSevere Thunderstorm WarningSHVBowie, Camp, Franklin, Morris, Red River, Titus48 min
May 18, 5:47 PM CDTSevere Thunderstorm WarningLZKArkansas, Cleveland, Jefferson, Lincoln58 min
May 18, 5:56 PM CDTSevere Thunderstorm WarningSHVCherokee, Rusk, Smith49 min
May 18, 6:01 PM CDTSevere Thunderstorm WarningSHVCamp, Cass, Gregg, Harrison, Marion, Morris and 2 more44 min
May 18, 6:06 PM CDTSevere Thunderstorm WarningLZKArkansas, Monroe, Prairie, Woodruff54 min
May 18, 6:10 PM CDTTornado WarningLZKMonroe, Prairie28 min
May 18, 6:17 PM CDTTornado WarningSHVRusk, Smith43 min
May 18, 6:21 PM CDTSevere Thunderstorm WarningLZKArkansas, Jefferson26 min
May 18, 6:35 PM CDTTornado WarningLZKArkansas, Monroe11 min
May 18, 6:37 PM CDTSevere Thunderstorm WarningSHVMiller38 min
May 18, 6:41 PM CDTSevere Thunderstorm WarningSHVGregg, Harrison, Panola, Rusk64 min
May 18, 6:58 PM CDTTornado Warning Tornado observedSHVGregg, Harrison, Panola, Rusk36 min
May 18, 7:08 PM CDTSevere Thunderstorm WarningSHVCherokee, Smith67 min
May 18, 7:19 PM CDTTornado WarningSHVHarrison, Marion41 min
May 18, 7:24 PM CDTTornado WarningSHVCherokee51 min
May 18, 7:41 PM CDTSevere Thunderstorm WarningSHVBossier, Caddo64 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

Shreveport, LA (KBAD), launched 12:00Z, 5.8 hours before the alert went out and 159 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 2019-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 471 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, Shreveport, LA at 12:00Z on 2019-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 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
471 J/kg
Mixed-layer CIN
-216 J/kg
Mixed-layer LCL
727 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 18, 9:10 AM CDTTornado WatchSPCBenton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more8 hr
May 18, 12:11 PM CDTMesoscale DiscussionSPCHoward, Little River, Polk, Scott, Sevier64 min
May 18, 12:47 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Crawford, Franklin and 9 more88 min
May 18, 3:32 PM CDTMesoscale DiscussionSPCBaxter, Boone, Clark, Cleburne, Conway, Dallas and 24 more88 min
May 18, 6:19 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Chicot, Cleveland, Craighead and 21 more116 min
May 18, 6:42 PM CDTSevere Thunderstorm WatchSPCCrittenden, Cross, Lee, Phillips, St. Francis4 hr
May 18, 5:16 PM CDTMesoscale DiscussionSPCBienville, Caldwell, Claiborne, De Soto, Grant, Jackson and 11 more119 min
May 17, 7:00 PM CDTMesoscale DiscussionSPCBeaver2 hr
May 18, 1:35 AM CDTMesoscale DiscussionSPCCarter, Comanche, Cotton, Garvin, Grady, Jefferson and 2 more2 hr
May 18, 2:20 AM CDTTornado WatchSPCCarter, Cleveland, Comanche, Cotton, Garvin, Grady and 9 more8 hr
May 18, 5:11 AM CDTMesoscale DiscussionSPCCarter, Comanche, Cotton, Garvin, Jefferson, Love and 3 more2 hr
May 18, 6:51 AM CDTMesoscale DiscussionSPCCarter, Cleveland, Coal, Cotton, Garvin, Grady and 11 more114 min
May 18, 7:47 AM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Cleveland, Creek and 18 more88 min
May 18, 9:38 AM CDTMesoscale DiscussionSPCCraig, Creek, Delaware, Mayes, Nowata, Osage and 5 more2 hr
May 18, 3:31 PM CDTMesoscale DiscussionSPCAlfalfa, Dewey, Ellis, Garfield, Grant, Harper and 3 more119 min
May 18, 3:48 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Beaver, Blaine, Ellis, Garfield, Grant and 5 more6 hr
May 18, 6:07 PM CDTMesoscale DiscussionSPCAlfalfa, Beaver, Dewey, Ellis, Garfield, Grant and 6 more83 min
May 17, 9:20 PM CDTMesoscale DiscussionSPCCrockett, Irion, Reagan, Schleicher, Sutton, Terrell and 1 more85 min
May 17, 11:47 PM CDTMesoscale DiscussionSPCBorden, Brown, Callahan, Coke, Coleman, Concho and 34 more2 hr
May 18, 1:16 PM CDTTornado WatchSPCAnderson, Bastrop, Bell, Blanco, Brazos, Burleson and 19 more9 hr
May 18, 6:37 PM CDTMesoscale DiscussionSPCCooke, Dallas, Denton, Parker, Tarrant, Wise53 min

Nearby

Tornado Watches in Arkansas, 2019Tornado Watches in Texas, 2019Tornado Watches in Louisiana, 2019Every tornado watch in 2019

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.