Alert archive / Arkansas / Tornado Watches in 2016

Tornado Watch 125

April 29, 20164 states

The Storm Prediction Center issued this tornado watch at Apr 29, 2016, 1:43 PM CDT for 4 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Apr 29, 2016, 1:43 PM CDT (18:43 UTC)
Expired
Apr 29, 2016, 10:00 PM CDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 40 counties

Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Pike County, AR, Sevier County, AR, Union County, AR, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, Lincoln Parish, LA, Ouachita Parish, LA, Union Parish, LA, Webster 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, Panola County, TX, Red River County, TX, Rusk County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 128 km from the middle of the area, began a volume at 18:45 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
50%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 29, 2:43 PM CDTSevere Thunderstorm WarningSHVOuachita, Union48 min
Apr 29, 2:47 PM CDTFlash Flood WarningSHVCamp, Franklin, Morris, Smith, Titus, Upshur and 1 more5 hr
Apr 29, 4:57 PM CDTFlash Flood WarningLZKClark, Pike5 hr
Apr 29, 5:13 PM CDTSevere Thunderstorm WarningSHVSmith, Wood62 min
Apr 29, 5:23 PM CDTTornado WarningSHVLittle River37 min
Apr 29, 5:34 PM CDTTornado WarningSHVSmith29 min
Apr 29, 5:42 PM CDTTornado WarningSHVHempstead, Nevada48 min
Apr 29, 5:55 PM CDTTornado WarningSHVSmith, Upshur, Wood33 min
Apr 29, 6:06 PM CDTTornado Warning Tornado observedConsiderable damage threatSHVSmith, Upshur, Wood29 min
Apr 29, 6:25 PM CDTTornado Warning Tornado observedConsiderable damage threatSHVCamp, Upshur, Wood35 min
Apr 29, 6:26 PM CDTTornado WarningSHVNevada15 min
Apr 29, 6:29 PM CDTSevere Thunderstorm WarningSHVCamp, Smith, Upshur, Wood45 min
Apr 29, 6:42 PM CDTTornado WarningSHVCamp, Upshur, Wood9 min
Apr 29, 6:56 PM CDTFlash Flood WarningSHVBowie, Camp, Cass, Franklin, Morris, Red River and 1 more10 hr
Apr 29, 6:56 PM CDTTornado WarningSHVCamp, Morris, Titus, Upshur20 min
Apr 29, 7:13 PM CDTSevere Thunderstorm WarningSHVCamp, Cass, Morris, Titus, Upshur28 min
Apr 29, 7:16 PM CDTTornado WarningSHVCamp, Cass, Harrison, Marion, Morris, Upshur23 min
Apr 29, 7:24 PM CDTFlash Flood WarningSHVHempstead, Howard, Little River, Nevada, Sevier10 hr
Apr 29, 7:35 PM CDTTornado WarningSHVCherokee, Nacogdoches, Rusk40 min
Apr 29, 7:38 PM CDTSevere Thunderstorm WarningSHVCherokee, Gregg, Rusk, Smith, Upshur52 min
Apr 29, 7:38 PM CDTSevere Thunderstorm WarningSHVCamp, Cass, Marion, Morris, Upshur21 min
Apr 29, 7:45 PM CDTFlash Flood WarningSHVSmith, Upshur, Wood10 hr
Apr 29, 7:59 PM CDTSevere Thunderstorm WarningSHVAngelina, Cherokee, Nacogdoches, Rusk, Shelby46 min
Apr 29, 8:46 PM CDTSevere Thunderstorm WarningSHVNacogdoches, Panola, Rusk, San Augustine, Shelby44 min
Apr 29, 9:21 PM CDTFlash Flood WarningSHVCass, Gregg, Harrison, Marion, Panola, Rusk8 hr
Apr 29, 9:23 PM CDTFlash Flood WarningLZKClark, Montgomery, Pike, Polk3 hr
Apr 29, 9:58 PM CDTTornado WarningSHVBossier, Caddo32 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, 6.7 hours before the alert went out and 127 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 2016-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1756 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 2016-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 310 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
1756 J/kg
Mixed-layer CIN
-129 J/kg
Mixed-layer LCL
632 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
310 m²/s²
0-3 km storm-relative helicity
451 m²/s²
Significant tornado parameter
0.9
Supercell composite
14.9

Open this sounding in Storm Lab

The text

As transmitted.

163 
WWUS20 KWNS 291836
SEL5  
SPC WW 291836
ARZ000-LAZ000-OKZ000-TXZ000-300300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 125
NWS STORM PREDICTION CENTER NORMAN OK
135 PM CDT FRI APR 29 2016

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  SOUTHWEST AND SOUTH CENTRAL ARKANSAS
  NORTHWEST LOUISIANA
  EXTREME SOUTHEAST OKLAHOMA
  NORTHEAST TEXAS

* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 135 PM UNTIL
  1000 PM CDT.

* PRIMARY THREATS INCLUDE...
  A FEW TORNADOES POSSIBLE
  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE
  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

SUMMARY...THUNDERSTORMS ARE ONGOING IN MULTIPLE BANDS FROM NORTHEAST
TEXAS INTO NORTHERN LOUISIANA AND SOUTHWEST ARKANSAS.  THESE STORMS
SHOULD STRENGTHEN THROUGH THE AFTERNOON...WITH THE POTENTIAL FOR
LARGE HAIL AND DAMAGING WINDS.  EMBEDDED ROTATING STORMS WILL ALSO
BE POSSIBLE...WITH AN ATTENDANT RISK FOR A FEW TORNADOES THIS
AFTERNOON.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST SOUTHWEST OF
DE QUEEN ARKANSAS TO 45 MILES EAST SOUTHEAST OF EL DORADO
ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 124...

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 24030.


...THOMPSON

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 29, 1:58 AM CDTMesoscale DiscussionSPCClark, Columbia, Dallas, Garland, Hempstead, Hot Spring and 11 more2 hr
Apr 29, 4:21 AM CDTSevere Thunderstorm WatchSPCArkansas, Clark, Cleveland, Conway, Crawford, Dallas and 25 more6 hr
Apr 29, 7:06 AM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Clark, Cleveland, Dallas and 5 more54 min
Apr 29, 9:46 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 29 more89 min
Apr 29, 12:51 PM CDTMesoscale DiscussionSPCBradley, Calhoun, Clark, Columbia, Hempstead, Howard and 8 more114 min
Apr 29, 5:42 PM CDTMesoscale DiscussionSPCBradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 11 more93 min
Apr 29, 12:37 PM CDTMesoscale DiscussionSPCEast Carroll, Madison83 min
Apr 28, 10:54 PM CDTSevere Thunderstorm WatchSPCBeaver, Cimarron, Texas7 hr
Apr 29, 2:59 AM CDTMesoscale DiscussionSPCBeaver, Ellis, Harper91 min
Apr 29, 4:54 AM CDTMesoscale DiscussionSPCHarmon66 min
Apr 29, 1:40 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Cleveland, Coal, Comanche and 15 more65 min
Apr 29, 1:57 PM CDTTornado WatchSPCAtoka, Bryan, Caddo, Canadian, Carter, Choctaw and 27 more8 hr
Apr 29, 3:56 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Caddo, Carter, Cleveland, Coal and 18 more64 min
Apr 29, 6:16 PM CDTMesoscale DiscussionSPCAdair, Atoka, Bryan, Carter, Cherokee, Choctaw and 25 more89 min
Apr 28, 7:52 PM CDTMesoscale DiscussionSPCBell, Brazos, Burleson, Burnet, Coryell, Falls and 7 more83 min
Apr 28, 10:31 PM CDTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Carson, Castro, Childress and 30 more89 min
Apr 29, 7:38 AM CDTMesoscale DiscussionSPCBriscoe, Cottle, Crosby, Dickens, Floyd, Foard and 10 more97 min
Apr 29, 12:52 PM CDTMesoscale DiscussionSPCBell, Blanco, Bosque, Brown, Burnet, Comanche and 22 more113 min
Apr 29, 1:08 PM CDTTornado WatchSPCAnderson, Bell, Bosque, Collin, Comanche, Cooke and 35 more9 hr
Apr 29, 3:34 PM CDTMesoscale DiscussionSPCBell, Bosque, Collin, Cooke, Coryell, Dallas and 31 more86 min

Nearby

Tornado Watches in Arkansas, 2016Tornado Watches in Texas, 2016Tornado Watches in Louisiana, 2016Every tornado watch in 2016

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.