Alert archive / Texas / Severe Thunderstorm Watches in 2017

Severe Thunderstorm Watch 1

January 2, 201773 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Jan 2, 2017, 1:39 AM CST for 73 counties in Texas. It was in force for 59 days.

The area

The outline as issued.

The facts

Issued: Jan 2, 2017, 1:39 AM CST (07:39 UTC)
Expired: Mar 1, 2017, 7:12 PM CST
In force: 59 days
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 73 counties

Anderson County, TX, Austin County, TX, Bastrop County, TX, Bell County, TX, Blanco County, TX, Bosque County, TX, Brazos County, TX, Brown County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Chambers County, TX, Collin County, TX, Colorado County, TX, Comanche County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Fayette County, TX, Freestone County, TX, Gillespie County, TX, Grimes County, TX, Hamilton County, TX, Harris County, TX, Hays County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Houston County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Kimble County, TX, Lampasas County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Limestone County, TX, Llano County, TX, Madison County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Milam County, TX, Mills County, TX, Montgomery County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Polk County, TX, Rains County, TX, Robertson County, TX, Rockwall County, TX, San Jacinto County, TX, San Saba County, TX, Somervell County, TX, Tarrant County, TX, Travis County, TX, Trinity County, TX, Van Zandt County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Williamson County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 59 km from the middle of the area, began a volume at 07:40 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: 20%
One or more EF2 to EF5 tornadoes: 10%
Ten or more severe wind reports: 40%
One or more gusts of 65 knots or more: 20%
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: 80%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jan 2, 2:53 AM CST	Severe Thunderstorm Warning	FWD	Comanche, Erath, Hamilton	67 min
Jan 2, 3:34 AM CST	Severe Thunderstorm Warning	FWD	Bell, Bosque, Coryell, Erath, Hamilton, Lampasas and 2 more	56 min
Jan 2, 4:21 AM CST	Severe Thunderstorm Warning	FWD	Bosque, Hill, Hood, Johnson, Somervell	54 min
Jan 2, 4:28 AM CST	Severe Thunderstorm Warning	FWD	Falls, Hill, Limestone, McLennan	62 min
Jan 2, 4:56 AM CST	Severe Thunderstorm Warning	FWD	Ellis, Navarro	64 min
Jan 2, 5:22 AM CST	Severe Thunderstorm Warning	FWD	Collin, Dallas, Denton, Kaufman, Rockwall	68 min
Jan 2, 5:25 AM CST	Severe Thunderstorm Warning	HGX	Harris, Montgomery	35 min
Jan 2, 5:28 AM CST	Severe Thunderstorm Warning	FWD	Freestone, Leon, Limestone, Robertson	62 min
Jan 2, 5:34 AM CST	Severe Thunderstorm Warning	FWD	Henderson, Kaufman	56 min
Jan 2, 5:36 AM CST	Severe Thunderstorm Warning	EWX	Bastrop, Lee	39 min
Jan 2, 5:50 AM CST	Severe Thunderstorm Warning	HGX	Liberty, Montgomery, Polk, San Jacinto	40 min
Jan 2, 5:55 AM CST	Severe Thunderstorm Warning	HGX	Harris, Liberty, Montgomery	35 min
Jan 2, 5:59 AM CST	Severe Thunderstorm Warning	FWD	Henderson, Hunt, Rains, Van Zandt	61 min
Jan 2, 6:06 AM CST	Severe Thunderstorm Warning	HGX	Brazos, Burleson, Washington	39 min
Jan 2, 6:09 AM CST	Severe Thunderstorm Warning	FWD	Anderson	51 min
Jan 2, 6:34 AM CST	Severe Thunderstorm Warning	FWD	Hopkins	56 min
Jan 2, 6:50 AM CST	Severe Thunderstorm Warning	HGX	Austin, Brazos, Burleson, Grimes, Harris, Montgomery and 3 more	55 min
Jan 2, 6:59 AM CST	Severe Thunderstorm Warning	HGX	Houston, Madison, Montgomery, Polk, San Jacinto, Trinity and 1 more	61 min
Jan 2, 7:45 AM CST	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend, Galveston, Harris, Liberty, Montgomery and 5 more	60 min
Jan 2, 8:44 AM CST	Severe Thunderstorm Warning	HGX	Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty and 2 more	91 min
Jan 15, 5:27 PM CST	Tornado Warning	FWD	Coryell	33 min
Jan 15, 5:47 PM CST	Tornado Warning	FWD	Bosque, Coryell, McLennan	28 min
Jan 15, 6:10 PM CST	Tornado Warning	FWD	Bosque	35 min
Jan 15, 6:22 PM CST	Tornado Warning	FWD	Bosque, Hill	38 min
Jan 15, 6:53 PM CST	Tornado Warning Tornado observed	FWD	Hill, Johnson	37 min
Jan 15, 7:23 PM CST	Severe Thunderstorm Warning	FWD	Ellis, Hill, Johnson	52 min
Jan 15, 7:45 PM CST	Tornado Warning	FWD	Johnson	30 min
Jan 15, 7:50 PM CST	Severe Thunderstorm Warning	FWD	Dallas, Ellis, Johnson, Tarrant	40 min
Jan 15, 8:04 PM CST	Tornado Warning	FWD	Johnson	16 min
Jan 15, 8:06 PM CST	Flash Flood Warning	FWD	Johnson, Tarrant	3 hr
Jan 15, 8:14 PM CST	Tornado Warning	FWD	Tarrant	31 min
Jan 15, 8:33 PM CST	Tornado Warning	FWD	Dallas, Tarrant	27 min
Jan 15, 9:01 PM CST	Severe Thunderstorm Warning	FWD	Dallas, Tarrant	44 min
Jan 15, 9:30 PM CST	Severe Thunderstorm Warning	FWD	Collin, Denton	60 min
Jan 15, 9:44 PM CST	Severe Thunderstorm Warning	EWX	Blanco, Comal, Kendall	46 min
Jan 15, 9:57 PM CST	Flash Flood Warning	FWD	Dallas	3 hr
Jan 15, 10:01 PM CST	Flash Flood Warning	FWD	Ellis	3 hr
Jan 15, 11:16 PM CST	Severe Thunderstorm Warning	FWD	Hopkins, Hunt, Rains	59 min
Jan 16, 3:45 AM CST	Severe Thunderstorm Warning	FWD	Leon	45 min
Jan 16, 3:51 AM CST	Tornado Warning	FWD	Leon	24 min
Jan 16, 4:42 AM CST	Tornado Warning	HGX	Austin, Colorado, Fort Bend, Wharton	33 min
Jan 16, 5:16 AM CST	Tornado Warning	HGX	Austin, Colorado, Fort Bend, Wharton	29 min
Jan 16, 5:47 AM CST	Tornado Warning	HGX	Austin, Fort Bend, Waller, Wharton	28 min
Jan 16, 6:12 AM CST	Tornado Warning	HGX	Austin, Fort Bend, Harris, Waller	33 min
Jan 16, 6:46 AM CST	Tornado Warning	HGX	Harris	29 min
Jan 16, 7:14 AM CST	Tornado Warning	HGX	Harris	31 min
Jan 16, 7:40 AM CST	Tornado Warning	HGX	Harris, Montgomery	35 min
Jan 16, 8:10 AM CST	Tornado Warning	HGX	Harris, Liberty, Montgomery	35 min
Jan 16, 8:25 AM CST	Tornado Warning	HGX	Fort Bend, Harris, Waller	35 min
Jan 16, 9:02 AM CST	Tornado Warning	HGX	Montgomery	28 min
Jan 18, 3:51 AM CST	Tornado Warning	HGX	Harris	24 min
Jan 18, 5:03 AM CST	Tornado Warning	HGX	Harris	27 min
Jan 18, 5:21 AM CST	Flash Flood Warning	HGX	Fort Bend, Harris, Wharton	5 hr
Jan 20, 5:57 PM CST	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend, Harris	33 min
Jan 20, 6:25 PM CST	Flash Flood Warning	HGX	Brazoria, Chambers, Galveston, Harris	2 hr
Feb 13, 10:43 PM CST	Severe Thunderstorm Warning	EWX	Gillespie	47 min
Feb 14, 6:28 AM CST	Severe Thunderstorm Warning	HGX	Colorado, Jackson, Matagorda, Wharton	62 min
Feb 14, 6:42 AM CST	Severe Thunderstorm Warning	HGX	Austin, Brazos, Burleson, Colorado, Grimes, Waller and 1 more	48 min
Feb 14, 6:45 AM CST	Tornado Warning	HGX	Colorado, Jackson, Wharton	45 min
Feb 14, 7:25 AM CST	Severe Thunderstorm Warning	HGX	Austin, Brazoria, Colorado, Fort Bend, Jackson, Matagorda and 1 more	65 min
Feb 14, 7:39 AM CST	Tornado Warning	HGX	Austin, Fort Bend, Wharton	36 min
Feb 14, 7:55 AM CST	Tornado Warning	HGX	Brazoria, Fort Bend, Harris, Wharton	50 min
Feb 14, 8:16 AM CST	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend, Harris, Montgomery, Walker	44 min
Feb 14, 8:21 AM CST	Severe Thunderstorm Warning	HGX	Harris, Houston, Liberty, Madison, Montgomery, Polk and 3 more	54 min
Feb 14, 8:37 AM CST	Tornado Warning	HGX	Brazoria, Fort Bend, Galveston, Harris	38 min
Feb 14, 8:56 AM CST	Severe Thunderstorm Warning	HGX	Brazoria, Chambers, Galveston, Harris, Liberty, Montgomery and 1 more	64 min
Feb 14, 8:58 AM CST	Severe Thunderstorm Warning	HGX	Houston, Liberty, Montgomery, Polk, San Jacinto, Trinity	47 min
Feb 14, 9:09 AM CST	Tornado Warning	HGX	Chambers, Harris, Liberty	30 min
Feb 14, 9:13 AM CST	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend, Harris	32 min
Feb 14, 9:43 AM CST	Severe Thunderstorm Warning	HGX	Liberty, Polk	47 min
Feb 14, 9:57 AM CST	Severe Thunderstorm Warning	HGX	Chambers, Galveston, Harris, Liberty, Polk	63 min
Feb 14, 10:22 AM CST	Severe Thunderstorm Warning	HGX	Chambers, Galveston	53 min
Feb 19, 4:18 PM CST	Severe Thunderstorm Warning	FWD	Eastland	57 min
Feb 19, 4:55 PM CST	Tornado Warning	FWD	Eastland, Stephens	35 min
Feb 19, 5:03 PM CST	Severe Thunderstorm Warning	SJT	Menard, Schleicher	42 min
Feb 19, 5:41 PM CST	Severe Thunderstorm Warning	SJT	Concho, Menard	49 min
Feb 19, 5:57 PM CST	Severe Thunderstorm Warning	SJT	Kimble, Menard	33 min
Feb 19, 6:33 PM CST	Severe Thunderstorm Warning	SJT	Menard	27 min
Feb 19, 10:56 PM CST	Severe Thunderstorm Warning	EWX	Bexar, Comal, Gonzales, Guadalupe, Hays, Wilson	42 min
Feb 19, 11:29 PM CST	Tornado Warning	EWX	Bastrop, Caldwell, Hays, Travis	46 min
Feb 19, 11:31 PM CST	Tornado Warning	EWX	Caldwell, Guadalupe, Hays	29 min
Feb 19, 11:53 PM CST	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Hays, Travis	37 min
Feb 20, 12:05 AM CST	Tornado Warning	EWX	Bastrop, Travis	25 min
Feb 20, 12:22 AM CST	Severe Thunderstorm Warning	EWX	Bastrop, Lee, Travis, Williamson	53 min
Feb 20, 12:23 AM CST	Tornado Warning	EWX	Williamson	22 min
Feb 20, 12:30 AM CST	Tornado Warning	FWD	Milam	30 min
Feb 20, 12:49 AM CST	Severe Thunderstorm Warning	HGX	Brazos, Burleson	41 min
Feb 20, 12:52 AM CST	Severe Thunderstorm Warning	FWD	Milam	35 min
Feb 20, 1:10 AM CST	Severe Thunderstorm Warning	FWD	Robertson	44 min
Feb 20, 1:19 AM CST	Severe Thunderstorm Warning	FWD	Falls, Limestone	56 min
Feb 20, 1:28 AM CST	Severe Thunderstorm Warning	HGX	Brazos, Burleson, Grimes, Madison	62 min
Feb 20, 1:38 AM CST	Severe Thunderstorm Warning	FWD	Freestone, Leon, Limestone, Robertson	67 min
Feb 20, 3:24 AM CST	Severe Thunderstorm Warning	HGX	Houston, Madison, Trinity, Walker	36 min
Feb 20, 4:47 AM CST	Severe Thunderstorm Warning	HGX	Austin, Colorado, Wharton	28 min
Feb 20, 5:09 AM CST	Severe Thunderstorm Warning	HGX	Austin, Colorado, Fort Bend, Harris, Waller, Washington and 1 more	36 min
Feb 20, 5:48 AM CST	Severe Thunderstorm Warning	HGX	Fort Bend, Grimes, Harris, Montgomery, Walker, Waller	42 min
Feb 27, 10:14 AM CST	Severe Thunderstorm Warning	FWD	Ellis, Johnson	46 min
Feb 27, 10:56 AM CST	Severe Thunderstorm Warning	FWD	Ellis	49 min
Feb 27, 11:34 AM CST	Severe Thunderstorm Warning	FWD	Kaufman	56 min
Feb 27, 12:26 PM CST	Severe Thunderstorm Warning	FWD	Kaufman, Van Zandt	64 min
Feb 27, 12:43 PM CST	Severe Thunderstorm Warning	FWD	Collin, Denton	62 min
Feb 27, 1:22 PM CST	Severe Thunderstorm Warning	FWD	Hopkins, Hunt	38 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

Fort Worth, TX (KFWD), launched 00:00Z, 7.7 hours before the alert went out and 86 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1528 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 160 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.

Issued	Product	Office	Counties	Lasted
Jan 1, 10:11 PM CST	Mesoscale Discussion	SPC	Archer, Baylor, Bosque, Brown, Callahan, Coleman and 35 more	3 hr
Jan 2, 1:04 AM CST	Mesoscale Discussion	SPC	Anderson, Austin, Bandera, Bastrop, Bell, Bexar and 71 more	86 min
Jan 2, 2:06 AM CST	Mesoscale Discussion	SPC	Jasper, Newton, Orange, Sabine, San Augustine, Shelby and 1 more	114 min
Jan 2, 3:36 AM CST	Mesoscale Discussion	SPC	Anderson, Bastrop, Bell, Blanco, Bosque, Brazos and 44 more	54 min
Jan 2, 5:35 AM CST	Mesoscale Discussion	SPC	Anderson, Angelina, Austin, Brazos, Burleson, Camp and 56 more	85 min
Jan 2, 6:12 AM CST	Tornado Watch	SPC	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 21 more	10 hr
Jan 2, 7:48 AM CST	Mesoscale Discussion	SPC	Angelina, Bowie, Camp, Cass, Chambers, Cherokee and 25 more	57 min

Nearby

Severe Thunderstorm Watches in Texas, 2017 Every severe thunderstorm watch in 2017

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.