Alert archive / Arkansas / Tornado Watches in 2010

Tornado Watch 191

May 19, 201016 counties in Arkansas; Adair County, Oklahoma

The Storm Prediction Center issued this tornado watch at May 19, 2010, 7:32 PM CDT for 16 counties in Arkansas; Adair County, Oklahoma. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 19, 2010, 7:32 PM CDT (00:32 UTC)
Expired
May 20, 2010, 2:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt

Counties Benton County, AR, Clark County, AR, Crawford County, AR, Franklin County, AR, Garland County, AR, Hot Spring County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Montgomery County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Washington County, AR, Yell County, AR, Adair County, OK

The radar

The Western Arkansas radar (KSRX), 24 km from the middle of the area, began a volume at 00:34 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
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 19, 7:35 PM CDTSevere Thunderstorm WarningTSASebastian55 min
May 19, 9:28 PM CDTSevere Thunderstorm WarningTSAAdair, Cherokee62 min
May 19, 9:47 PM CDTSevere Thunderstorm WarningTSAAdair, Cherokee, Delaware, Mayes, Muskogee, Sequoyah and 1 more58 min
May 19, 9:58 PM CDTSevere Thunderstorm WarningTSACrawford, Franklin, Sebastian45 min
May 19, 10:30 PM CDTSevere Thunderstorm WarningLZKGarland, Montgomery, Perry, Saline, Yell45 min
May 19, 10:37 PM CDTSevere Thunderstorm WarningTSABenton, Crawford, Washington53 min
May 19, 10:39 PM CDTSevere Thunderstorm WarningLZKMontgomery, Polk51 min
May 19, 10:47 PM CDTTornado WarningLZKMontgomery, Polk43 min
May 19, 11:14 PM CDTSevere Thunderstorm WarningTSABenton, Carroll, Madison, Washington61 min
May 19, 11:31 PM CDTSevere Thunderstorm WarningLZKGarland, Montgomery, Polk, Scott, Yell59 min
May 19, 11:46 PM CDTFlash Flood WarningTSABenton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more6 hr
May 19, 11:50 PM CDTTornado WarningLZKMontgomery, Scott, Yell40 min
May 20, 12:22 AM CDTFlash Flood WarningLZKBaxter, Boone, Conway, Fulton, Garland, Izard and 14 more6 hr
May 20, 12:30 AM CDTSevere Thunderstorm WarningLZKGarland, Montgomery, Perry, Polk, Scott, Yell60 min
May 20, 1:16 AM CDTSevere Thunderstorm WarningLZKMontgomery, Polk, Scott59 min
May 20, 1:48 AM CDTFlash Flood WarningTSABenton4 hr

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 00:00Z, 0.5 hours before the alert went out and 165 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 2010-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2010-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 355 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
807 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
355 m²/s²
0-3 km storm-relative helicity
864 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 19, 9:05 PM CDTMesoscale DiscussionSPCCrawford, Howard, Logan, Montgomery, Pike, Polk and 4 more85 min
May 19, 11:09 PM CDTMesoscale DiscussionSPCBenton, Boone, Carroll, Conway, Crawford, Franklin and 20 more96 min
May 20, 1:54 AM CDTMesoscale DiscussionSPCHoward, Little River, Logan, Montgomery, Pike, Polk and 4 more66 min
May 20, 2:05 AM CDTSevere Thunderstorm WatchSPCCalhoun, Clark, Columbia, Dallas, Garland, Hempstead and 12 more7 hr
May 20, 8:57 AM CDTMesoscale DiscussionSPCChicot63 min
May 20, 10:28 AM CDTSevere Thunderstorm WatchSPCAshley, Chicot12 hr
May 20, 12:44 PM CDTSevere Thunderstorm WatchSPCCrittenden, Mississippi9 hr
May 19, 7:32 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Cherokee, Choctaw, Cleveland and 29 more58 min
May 19, 9:35 PM CDTTornado WatchSPCAtoka, Bryan, Carter, Cherokee, Choctaw, Coal and 22 more4 hr
May 20, 4:59 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Johnston, Marshall61 min

Nearby

Tornado Watches in Arkansas, 2010Tornado Watches in Oklahoma, 2010Every tornado watch in 2010

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.