An upper level trough dug across the Southern Plains during the morning hours of April 26th, resulting in a moderately strong low level jet developing from Central Texas northeast across much of the Ark-La-Tex region. This aided in warmer temperatures, increased low level moisture, and hence greater surface instability returning to the area ahead of an associated cold front that shifted…
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SHV wrote it up.
An upper level trough dug across the Southern Plains during the morning hours of April 26th, resulting in a moderately strong low level jet developing from Central Texas northeast across much of the Ark-La-Tex region. This aided in warmer temperatures, increased low level moisture, and hence greater surface instability returning to the area ahead of an associated cold front that shifted southeast into the region shortly after daybreak. Lapse rates aloft also steepened ahead of the approaching upper level trough and cold front, with scattered showers and thunderstorms developing from mid and late morning across Southeast Oklahoma, Southwest Arkansas, and extreme Northeast Texas, across the remainder of East Texas and North Louisiana during the afternoon. Given the adequate instability and shear in place, some of these storms became strong or severe, with large hail the primary result. Several instances of wind damage were also noted across North Louisiana. These storms weakened as they moved out of the area during the early evening with the passage of the cold front.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Shreveport, LA wrote its last area forecast discussion before the first event at Apr 26, 1:31 PM CST, 1 hour 29 minutes earlier.
Area Forecast Discussion
National Weather Service Shreveport LA
231 PM CDT Wed Apr 26 2017
.DISCUSSION...
...Very heavy rainfall likely for this weekend across Arkansas
and Southeast Oklahoma...
Cold front accompanied by a line of severe TSTMS to continue
pushing E through Thursday morning. This front to push into MS and
SE TX by during Thursday with negative vorticity advection and
cold air advection clearing skies and rainfall from NW to SE
through late tonight behind the cold front.
For Thursday, expect quiet weather with a stable and dry airmass
behind the front. By Friday, another trough develops and deepens
over the four corners of the desert SW with a deep tropical
moisture fetch advecting N from the southern Gulf of Mexico into
the central U.S.
During this weekend, the trough slowly ejects E into the OK and
KS. All forecasts models show very heavy rainfall developing in AR
during much of this weekend. Accordingly, expect the flooding
threat to increase across the N half of the ArkLaTex region this
weekend into early next week with storm total amounts upwards of
ten inches in the favored locations of the Ouachita Mountains. In
addition, we can expect severe weather with the passage of a line
or even two lines of TSTMS during Saturday and Sunday.
Expect quiet weather to then begin next week and the beginning of
May behind the cold front that sweeps across the region during
Sunday. /VIII/.
&&
.PREV DISCUSSION... /issued 111 PM CDT Wed Apr 26 2017/
AVIATION...
For the ArkLaTex, Squall line coming together near KTYR/KTXK/KLIT
moving E at 30KTS. At this pace 19Z-01Z is currently in TAFS with
all terminals sporting tempo groups for wind to 40KT and 1sm, of
course some variation will occur and further amendments to follow
observed pace on our radar. Sfc winds are S/SE over LA, but SW/S
over TX with the former potentially tornadic this aftn with decent
heating. W/NW will follow convection closely and strong sustained
values will quickly drop off W to E with only weak high pressure.
/24/
&&
.PRELIMINARY POINT TEMPS/POPS...
SHV 48 78 62 87 / 30 10 10 20
MLU 52 77 60 87 / 50 10 10 20
DEQ 42 75 56 81 / 30 0 10 30
TXK 46 76 59 84 / 40 0 10 30
ELD 48 76 58 84 / 60 10 10 20
TYR 47 80 64 87 / 20 0 10 20
GGG 46 79 63 87 / 20 0 10 20
LFK 51 85 65 92 / 20 0 10 20
&&
.SHV WATCHES/WARNINGS/ADVISORIES...
AR...Lake Wind Advisory until 2 AM CDT Thursday for ARZ050-051-
059>061-070>073.
LA...Lake Wind Advisory until 2 AM CDT Thursday for LAZ001>006-
010>014-017>022.
OK...Lake Wind Advisory until 2 AM CDT Thursday for OKZ077.
TX...Lake Wind Advisory until 2 AM CDT Thursday for TXZ096-097-
108>112-124>126-136>138-149>153-165>167.
&&
08Hazardous Weather Outlook National Weather Service Shreveport LA 1119 AM CDT Wed Apr 26 2017 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-271630- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto- Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn- Grant-Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp- Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk- Panola-Nacogdoches-Shelby-Angelina-San Augustine- 1119 AM CDT Wed Apr 26 2017 This Hazardous Weather Outlook is for portions of south central Arkansas, southwest Arkansas, north central Louisiana, northwest Louisiana, southeast Oklahoma, east Texas and northeast Texas. .DAY ONE...Today and Tonight... A potent cold front will move across the Four State Region through this evening. Very strong southerly winds ahead of the cold front will increase instability across the region, leading to the development of a line of thunderstorms along the front. Some of the thunderstorms will be severe with large hail, damaging wind gusts, and an isolated tornado or two across the northern half of the ArkLaTex region. In addition, windy conditions will occur along, ahead, and just behind the cold front, with sustained wind speeds increasing into the 15 to 25 mph range, with gusts nearing 40 mph or higher this afternoon through this evening. A Lake Wind Advisory is therefore in effect from through 9 pm this Wednesday evening. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... Very warm, humid, and unstable conditions will return to the region by Friday as a warm front lifts back north, with isolated to scattered showers and thunderstorms possible along and north of this returning front Thursday night and Friday. An isolated severe thunderstorm can not be ruled out Friday with this activity. The approach of another upper level disturbance for the weekend will result in the development of a line of thunderstorms along a cold front, that will move across the Four State Region from west to east during Saturday night into Sunday morning. Once again, strong wind shear and instability may lead to some of the thunderstorms becoming strong to severe. In addition, very heavy rainfall upwards to a foot is possible across portions of central and southern Arkansas during this upcoming weekend. Accordingly, the flooding threat increases markedly this weekend and early next week as Arkansas rivers and bayous respond to the heavy rainfall. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel...amateur radio operators...and storm spotters will be required early this Wednesday afternoon through this Wednesday evening. VIII.
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</html>Special Weather Statement National Weather Service Shreveport LA 244 PM CDT WED APR 26 2017 ARZ059-060-070-071-TXZ097-112-262030- Hempstead AR-Lafayette AR-Little River AR-Miller AR-Cass TX-Bowie TX- 244 PM CDT WED APR 26 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LITTLE RIVER... SOUTHWESTERN HEMPSTEAD...MILLER...NORTH CENTRAL LAFAYETTE... NORTHEASTERN CASS AND SOUTHEASTERN BOWIE COUNTIES UNTIL 330 PM CDT... At 243 PM CDT, Doppler radar was tracking a strong thunderstorm 9 miles northeast of Queen City, or 11 miles northeast of Atlanta, moving northeast at 35 mph. Nickel size hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Texarkana, Queen City, Fouke, Garland, Fulton, Mandeville, Genoa, Mount Pleasant, Bloomburg, Domino, McNab, Ferguson, Pleasant Hill, Hervey, Homan and Piney Grove. A tornado watch remains in effect until 500 PM CDT for southwestern Arkansas...and northeastern Texas. LAT...LON 3309 9405 3320 9420 3371 9389 3347 9352 TIME...MOT...LOC 1943Z 220DEG 30KT 3326 9405 13
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
255 PM CDT WED APR 26 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0250 PM HAIL 3 N LONGVIEW 32.56N 94.76W
04/26/2017 E0.75 INCH GREGG TX AMATEUR RADIO
&&PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SHREVEPORT LA
257 PM CDT WED APR 26 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0257 PM HAIL 3 N LONGVIEW 32.56N 94.76W
04/26/2017 E1.00 INCH GREGG TX PUBLIC
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
339 PM CDT WED APR 26 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0315 PM TSTM WND DMG 3 N JEFFERSON 32.81N 94.34W
04/26/2017 MARION TX LAW ENFORCEMENT
SHERIFF DEPARTMENT REPORTS TREES DOWN ACROSS
FM ROAD 1324.
&&
20The Shreveport radar (KSHV), 13 km away, was scanning. The volume nearest the first event began at 20:57 UTC.
5 hail, 4 thunderstorm wind. Local standard time, as filed.
A tree and a utility pole were downed on Colquitt Street in Bossier City.
A large tree was downed across the road at the intersection of State Highway 797 and Hwy. 147.
Hail fell in the Lucky and Friendship communities.
Trees were downed on Hamilton Road in Dubach.
Monroe Regional Airport ASOS recorded a measured thunderstorm wind gust of 51 knots, or 59 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2017Every state in 2017This day in weather historyWarnings in Louisiana, April 2017
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 684805, 684809, 684820, 684822, 684823, 684824, 684826, 684825, 684827.