Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 8, NWS Fort Worth, TX

January 2, 2017Henderson County, Kaufman County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jan 2, 2017, 5:34 AM CST for Henderson County, Kaufman County, Texas. It was in force for 56 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jan 2, 2017, 5:34 AM CST (11:34 UTC)
Expired: Jan 2, 2017, 6:30 AM CST
In force: 56 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Henderson County, TX, Kaufman County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 99 km from the middle of the area, began a volume at 11:38 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 was reported inside it

Time	Report	Where	Remark
Jan 2, 5:35 AM CST	TSTM WND DMG	Cottonwood, TX	DELAYED REPORT - THE COTTONWOOD COMMUNITY CENTER'S ROOF WAS BLOWN OFF EARLY THIS MORNING DUE TO SEVERE THUNDERSTORM WINDS. SEVERAL TREES ALONG COUNTY ROADS WERE
Jan 2, 5:35 AM CST	TSTM WND DMG	Cottonwood, TX	DELAYED REPORT - THE COTTONWOOD COMMUNITY CENTER'S ROOF WAS BLOWN OFF EARLY THIS MORNING DUE TO SEVERE THUNDERSTORM WINDS. SEVERAL TREES ALONG COUNTY ROADS WERE BLOWN DOWN NEAR COTTONWOOD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this severe thunderstorm warning; the first came 1 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 2, 1:39 AM CST	Severe Thunderstorm Watch	SPC	59 days

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 11.6 hours before the alert went out and 107 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

The text

As transmitted.

357 
WUUS54 KFWD 021134
SVRFWD
TXC213-257-021230-
/O.NEW.KFWD.SV.W.0008.170102T1134Z-170102T1230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Fort Worth TX
534 AM CST MON JAN 2 2017

The National Weather Service in Fort Worth has issued a

* Severe Thunderstorm Warning for...
  Northwestern Henderson County in central Texas...
  Kaufman County in north central Texas...

* Until 630 AM CST

* At 534 AM CST, a severe thunderstorm was located near Cottonwood,
  or 10 miles northeast of Ennis, moving northeast at 55 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* This severe thunderstorm will be near,
  Cottonwood around 540 AM CST. 
  Grays Prairie around 545 AM CST. 
  Kaufman and Kemp around 550 AM CST. 

Other locations impacted by this severe thunderstorm include Rosser,
Payne Springs, Oak Ridge, Lawrence, Oak Grove and Post Oak Bend City.

THIS INCLUDES INTERSTATE 20 between MILE MARKERs 486 and 511.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection get inside a sturdy structure and stay away from
windows.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning can kill.

&&

LAT...LON 3216 9607 3216 9617 3218 9618 3222 9615
      3220 9619 3225 9624 3225 9626 3226 9629
      3230 9630 3235 9645 3241 9644 3245 9650
      3253 9651 3254 9653 3281 9652 3282 9630
      3284 9629 3284 9608 3236 9608 3235 9605
TIME...MOT...LOC 1134Z 239DEG 46KT 3243 9649 

HAIL...<.75IN
WIND...60MPH
 
$$

30

1 follow-up statement

559 
WWUS54 KFWD 021228
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
628 AM CST MON JAN 2 2017

TXC213-257-021236-
/O.EXP.KFWD.SV.W.0008.000000T0000Z-170102T1230Z/
Henderson TX-Kaufman TX-
628 AM CST MON JAN 2 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN HENDERSON AND
KAUFMAN COUNTIES WILL EXPIRE AT 630 AM CST...
        
The storm which prompted the warning has exited Kaufman County and
far western Henderson County. Therefore the warning will be allowed
to expire for these areas.  A severe thunderstorm warning continues
for central and eastern Henderson counties until 700 am.

A severe thunderstorm watch remains in effect until 900 AM CST for
north central and central Texas.

LAT...LON 3216 9607 3216 9617 3218 9618 3222 9615
      3220 9619 3225 9624 3225 9626 3226 9629
      3230 9630 3235 9645 3241 9644 3245 9650
      3253 9651 3254 9653 3281 9652 3282 9630
      3284 9629 3284 9608 3236 9608 3235 9605
TIME...MOT...LOC 1226Z 239DEG 46KT 3276 9583 

$$

92

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jan 2, 1:58 AM CST, 3 hours 36 minutes earlier.

Area forecast discussion, Jan 2, 1:58 AM CST, 3 hours 36 minutes before

Area Forecast Discussion
National Weather Service Fort Worth TX
158 AM CST Mon Jan 2 2017

.DISCUSSION...
Convection is beginning to increase just west of the forecast area
as a shortwave trough and its attendant cold front encounter
increasingly moist and unstable air the farther east they
progress. The expectation is that we will see an uptick in showers
and storms west of the I-35 corridor during the next few hours. A
few discrete cells will be possible early in the evolution of this
convective activity, which means that quarter-sized hail and
damaging winds will both be threats with any storms that become
severe. But, chances are that storms will quickly develop upscale
into a linear MCS as they approach I-35 10-12Z, shifting the
severe threat to mostly damaging straight line winds. In both
cases, an isolated tornado cannot be ruled out.

Either way, moisture, shear and instability seem sufficient for
strong to a few severe storms as the system marches across the
region, and a severe thunderstorm watch has been issued for all
but the northern-most counties or North Texas. The watch is valid
until 15Z/9AM and I anticipate being able to trim counties from
the watch from west to east as the morning progresses.

Showers and storms will move east of the region by midday, leaving
nice weather behind for the afternoon. The rest of the forecast
will be focused on a couple of shots of Arctic air and the
resulting below-normal temperatures. The first Arctic front will
arrive during the day Tuesday, dropping temperatures 15 to 20
degrees by Tuesday evening. Lows ranging from the upper 20s
northwest to around 40 southeast can be expected Wednesday
morning, with Wednesday's highs generally in the 40s. A second
push of cold air is expected on Thursday, which will drop the
temperatures another 5 to 10 degrees, bringing widespread low
temps in the 20s Thursday night/Friday morning.

Model data from previous days had indicated that there would be
enough moisture to produce some wintry precipitation, but the most
recent model data has trended much drier. We have subsequently
removed all mention of winter precipitation, but will certainly
keep an eye on model trends regarding moisture and lift as we head
through the week. The cold, dry weather will continue through the
weekend, with a warm-up to near normal temperatures early next
week.

30

&&

.AVIATION...
/ISSUED 1120 PM CST Sun Jan 1 2017/
/06Z TAFs/

Concerns...MVFR/IFR cigs and thunderstorms tonight through Monday
morning.

Overall, there are not any significant changes to the TAFs. MVFR
cigs will continue to overspread the region for the next few hours
with a brief period of IFR cigs between 08-11Z. Some light fog may
also reduce visbys to 3-5SM. A line of thunderstorms will move
across the region early Monday morning, impacting the TAF sites
between 10-15Z. These storms could be strong to severe with better
chances for severe weather affecting KACT. Strong winds and hail
are the main hazards with these storms overnight but an isolated
tornado cannot be ruled out.

In the wake of the line of storms, the winds will become westerly
in the afternoon hours, and then southwesterly in the evening
hours. VFR conditions are expected to prevail but a few hours of
MVFR cigs may linger until the west winds reach the airports. Wind
speeds behind the line are expected to be less than 12 kts.
Looking a little farther beyond the valid TAF period, a front will
arrive on Tuesday and breezy north winds are expected.

JLDunn

&&

.PRELIMINARY POINT TEMPS/POPS...
Dallas-Ft. Worth    70  49  59  34  44 /  60   0   0   0   0
Waco                72  45  66  36  47 /  50   0   0   0   0
Paris               69  47  59  33  44 /  90   0   5   5   5
Denton              69  46  56  30  43 /  60   0   0   0   0
McKinney            69  47  58  32  43 /  70   0   0   0   0
Dallas              72  51  60  34  45 /  70   0   0   0   0
Terrell             71  47  62  35  45 /  80   0   0   0   0
Corsicana           70  48  65  37  47 /  80   0   0   0   0
Temple              73  46  68  36  48 /  50   0   0   0   0
Mineral Wells       70  45  57  29  44 /  30   0   0   0   0

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
None.
&&

79/30

Hazardous weather outlook, Jan 2, 2:48 AM CST, 2 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
248 AM CST MON JAN 2 2017

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-030845-
MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN-
HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS-
ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL-
JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO-
FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE-
LEON-MILAM-ROBERTSON-
238 AM CST MON JAN 2 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH AND CENTRAL TEXAS.

.DAY ONE...TODAY AND TONIGHT.
THUNDERSTORMS ARE LIKELY ACROSS THE ENTIRE REGION THIS MORNING.
SOME STORMS MAY BECOME SEVERE WITH DAMAGING WINDS AND LARGE HAIL.
AN ISOLATED TORNADO OR TWO IS ALSO POSSIBLE...WITH THE BEST
CHANCES SOUTH OF THE INTERSTATE 20 CORRIDOR. ALL STORMS WILL MOVE
EAST OF THE REGION BY MIDDAY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS POSSIBLE ACROSS ALL OF NORTH AND CENTRAL
TEXAS THIS MORNING BUT MOST LIKELY FOR AREAS SOUTH OF INTERSTATE
20.

In the hours before

Local storm report, Jan 2, 4:30 AM CST, 1 hour 4 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTION
NATIONAL WEATHER SERVICE FORT WORTH TX
430 AM CST MON JAN 02 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0426 AM     TSTM WND GST     MCGREGOR                31.43N  97.42W
01/02/2017  M64 MPH          MCLENNAN           TX   AWOS

            MEASURED 64 MPH WIND GUST IN MCGREGOR

Special weather statement, Jan 2, 4:32 AM CST, 1 hour 2 minutes before

Special Weather Statement
National Weather Service Fort Worth TX
432 AM CST MON JAN 2 2017

TXZ158-160-174-175-021130-
Robertson TX-Bell TX-Milam TX-Falls TX-
432 AM CST MON JAN 2 2017

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN BELL...SOUTHERN FALLS...
WESTERN ROBERTSON AND MILAM COUNTIES UNTIL 530 AM CST...

At 431 AM CST, Doppler radar was tracking strong thunderstorms along
a line extending from near Troy to near Granger. Movement was
southeast at 35 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Temple, Rockdale, Cameron, Little River-Academy, Troy, Bartlett,
Rosebud, Thorndale, Rogers, Calvert, Holland, Bremond, Lott,
Buckholts and Milano.

LAT...LON 3046 9715 3073 9727 3082 9750 3127 9730
      3129 9664 3122 9659 3070 9669
TIME...MOT...LOC 1031Z 294DEG 32KT 3121 9726 3071 9747

30

Special weather statement, Jan 2, 4:34 AM CST, 1 hour before

Special Weather Statement
National Weather Service Fort Worth TX
434 AM CST MON JAN 2 2017

TXZ118-021115-
Tarrant TX-
434 AM CST MON JAN 2 2017

...SIGNIFICANT WEATHER ADVISORY FOR TARRANT COUNTY UNTIL 515 AM
CST...

At 434 AM CST, Doppler radar was tracking a strong thunderstorm near
White Settlement, moving northeast at 35 mph.

Wind gusts up to 50 mph will be possible with this storm.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm. Seek
a safe shelter inside a building or vehicle.

&&

LAT...LON 3298 9703 3255 9704 3256 9755 3299 9754
TIME...MOT...LOC 1034Z 218DEG 32KT 3278 9751

30

Local storm report, Jan 2, 4:38 AM CST, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
438 AM CST MON JAN 02 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0431 AM     TSTM WND GST     WACO                    31.55N  97.15W
01/02/2017  M66 MPH          MCLENNAN           TX   ASOS

            MEASURED 66 MPH WIND GUST AT WACO AIRPORT

Special weather statement, Jan 2, 5:04 AM CST, 30 minutes before

Special Weather Statement
National Weather Service Fort Worth TX
504 AM CST MON JAN 2 2017

TXZ118-119-021145-
Dallas TX-Tarrant TX-
504 AM CST MON JAN 2 2017

...SIGNIFICANT WEATHER ADVISORY FOR DALLAS AND EASTERN TARRANT
COUNTIES UNTIL 545 AM CST...

At 504 AM CST, Doppler radar was tracking strong thunderstorms along
a line extending from near Grapevine to Mansfield. Movement was
northeast at 40 mph.

Wind gusts up to 50 mph will be possible with these storms.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with these storms.
Seek a safe shelter inside a building or vehicle.

&&

LAT...LON 3255 9652 3255 9727 3298 9726 3298 9652
TIME...MOT...LOC 1104Z 245DEG 36KT 3295 9710 3258 9709

30

Local storm report, Jan 2, 5:12 AM CST, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
512 AM CST MON JAN 02 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0510 AM     HAIL             1 SW MIDLOTHIAN         32.47N  96.99W
01/02/2017  E0.88 INCH       ELLIS              TX   BROADCAST MEDIA

            NICKEL SIZE HAIL 1 MILE SOUTHWEST OF MIDLOTHIAN

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 2, 2:19 AM CST	Special Weather Statement	FWD	Mills	26 min
Jan 2, 2:40 AM CST	Special Weather Statement	FWD	Comanche, Hamilton, Mills	35 min
Jan 2, 2:53 AM CST	Severe Thunderstorm Warning	FWD	Comanche, Erath, Hamilton	67 min
Jan 2, 3:21 AM CST	Special Weather Statement	FWD	Coryell, Lampasas	39 min
Jan 2, 3:34 AM CST	Severe Thunderstorm Warning	FWD	Bell, Bosque, Coryell, Erath, Hamilton, Lampasas and 2 more	56 min
Jan 2, 4:02 AM CST	Special Weather Statement	FWD	Hood, Parker	28 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, 4:32 AM CST	Special Weather Statement	FWD	Falls, Milam	58 min
Jan 2, 4:34 AM CST	Special Weather Statement	FWD	Tarrant	41 min
Jan 2, 4:56 AM CST	Severe Thunderstorm Warning	FWD	Ellis, Navarro	64 min
Jan 2, 5:04 AM CST	Special Weather Statement	FWD	Dallas	41 min
Jan 2, 5:22 AM CST	Severe Thunderstorm Warning	FWD	Collin, Dallas, Denton, Kaufman, Rockwall	68 min
Jan 2, 5:28 AM CST	Severe Thunderstorm Warning	FWD	Freestone, Leon, Limestone, Robertson	62 min
Jan 2, 5:46 AM CST	Special Weather Statement	FWD	Grayson	44 min
Jan 2, 5:59 AM CST	Severe Thunderstorm Warning	FWD	Henderson, Hunt, Rains, Van Zandt	61 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, 6:38 AM CST	Special Weather Statement	FWD	Fannin	37 min

Nearby

Severe Thunderstorm Warnings in Texas, 2017 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.