Alert archive / Texas / Mesoscale Discussions in 2020

Mesoscale Discussion 434

April 22, 20207 counties in Kansas; 6 counties in Oklahoma; 13 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2020, 2:16 AM CDT for 7 counties in Kansas; 6 counties in Oklahoma; 13 counties in Texas. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Apr 22, 2020, 2:16 AM CDT (07:16 UTC)
Expired: Apr 22, 2020, 4:15 AM CDT
In force: 119 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 26 counties

Barber County, KS, Clark County, KS, Comanche County, KS, Kiowa County, KS, Meade County, KS, Seward County, KS, Stevens County, KS, Beaver County, OK, Ellis County, OK, Harper County, OK, Texas County, OK, Woods County, OK, Woodward County, OK, Carson County, TX, Dallam County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Roberts County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 136 km from the middle of the area, began a volume at 07:16 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.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 7.3 hours before the alert went out and 136 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 262 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 2114 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 21, 9:10 PM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 24 more	95 min
Apr 21, 11:32 PM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 24 more	88 min
Apr 22, 1:21 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Coal, Garvin and 7 more	84 min
Apr 22, 1:46 AM CDT	Severe Thunderstorm Watch	SPC	Atoka, Bryan, Carter, Choctaw, Garvin, Johnston and 6 more	4 hr
Apr 22, 8:36 AM CDT	Mesoscale Discussion	SPC	Atoka, Blaine, Caddo, Canadian, Carter, Cleveland and 26 more	84 min
Apr 22, 8:53 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Atoka, Bryan, Caddo, Canadian, Carter and 46 more	6 hr
Apr 22, 11:29 AM CDT	Mesoscale Discussion	SPC	Atoka, Coal, Haskell, Hughes, Latimer, LeFlore and 5 more	91 min
Apr 22, 1:12 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Coal, Garvin and 7 more	63 min
Apr 22, 2:33 PM CDT	Tornado Watch	SPC	Atoka, Bryan, Carter, Choctaw, Coal, Garvin and 11 more	6 hr
Apr 22, 4:43 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Coal, Garvin, Johnston, Marshall and 2 more	62 min
Apr 22, 6:39 PM CDT	Mesoscale Discussion	SPC	McCurtain	66 min
Apr 21, 8:12 PM CDT	Mesoscale Discussion	SPC	Hemphill, Lipscomb, Wheeler	63 min
Apr 22, 10:38 AM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Bastrop, Bell, Blanco and 50 more	2 hr
Apr 22, 10:55 AM CDT	Tornado Watch	SPC	Anderson, Angelina, Austin, Bastrop, Brazos, Burleson and 31 more	6 hr
Apr 22, 1:10 PM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Bastrop, Bell, Brazos and 35 more	65 min
Apr 22, 2:53 PM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Cherokee, Houston, Nacogdoches, Panola and 5 more	67 min
Apr 22, 4:24 PM CDT	Mesoscale Discussion	SPC	Angelina, Brazos, Cherokee, Grimes, Hardin, Houston and 14 more	96 min
Apr 22, 4:47 PM CDT	Mesoscale Discussion	SPC	Angelina, Polk, San Augustine, San Jacinto, Trinity, Tyler and 1 more	88 min
Apr 22, 5:01 PM CDT	Tornado Watch	SPC	Angelina, Cherokee, Grimes, Harrison, Houston, Jasper and 14 more	9 hr
Apr 22, 5:38 PM CDT	Mesoscale Discussion	SPC	Camp, Collin, Dallas, Delta, Fannin, Franklin and 10 more	97 min
Apr 22, 5:53 PM CDT	Mesoscale Discussion	SPC	Angelina, Polk, Trinity, Tyler	37 min

Nearby

Mesoscale Discussions in Texas, 2020 Mesoscale Discussions in Kansas, 2020 Mesoscale Discussions in Oklahoma, 2020 Every mesoscale discussion in 2020

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.