Alert archive / Texas / Tornado Warnings in 2019

Tornado Warning 20, NWS Fort Worth, TX

April 30, 2019Denton County, Texas

NWS Fort Worth, TX issued this tornado warning at Apr 30, 2019, 6:59 PM CDT for Denton County, Texas. It was in force for 31 min. 1 report 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: Apr 30, 2019, 6:59 PM CDT (23:59 UTC)
Expired: Apr 30, 2019, 7:30 PM CDT
In force: 31 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Denton County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 90 km from the middle of the area, began a volume at 00:00 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
Apr 30, 7:00 PM CDT	TSTM WND DMG	2 Ne Denton, TX	SEVERAL TREES DOWN JUST NORTHEAST OF TWU

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 30, 2:19 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 12.0 hours before the alert went out and 63 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: 1278 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 701 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 237 m²/s²
0-3 km storm-relative helicity: 356 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 8.5

Open this sounding in Storm Lab

The text

As transmitted.

925 
WFUS54 KFWD 302359
TORFWD
TXC121-010030-
/O.NEW.KFWD.TO.W.0020.190430T2359Z-190501T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Fort Worth TX
659 PM CDT Tue Apr 30 2019

The National Weather Service in Fort Worth has issued a

* Tornado Warning for...
  Northeastern Denton County in north central Texas...

* Until 730 PM CDT.
    
* At 659 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Denton, moving northeast at 30 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Krugerville around 705 PM CDT.
  Aubrey and Ray Roberts Park Isle Du Bois around 715 PM CDT.
  Pilot Point around 725 PM CDT.

This includes the following highways...
 Interstate 35 between mile markers 468 and 471.
 Interstate 35E between mile markers 463 and 464.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

&&

LAT...LON 3341 9684 3339 9684 3318 9711 3324 9720
      3342 9710
TIME...MOT...LOC 2359Z 212DEG 28KT 3326 9710 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

30

2 follow-up statements

518 
WWUS54 KFWD 010008
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
708 PM CDT Tue Apr 30 2019

TXC121-010030-
/O.CON.KFWD.TO.W.0020.000000T0000Z-190501T0030Z/
Denton TX-
708 PM CDT Tue Apr 30 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR NORTH
CENTRAL DENTON COUNTY...
    
At 708 PM CDT, a severe thunderstorm capable of producing a tornado 
was located near Ray Roberts Park Isle Du Bois, or southeast 
of Sanger, moving north at 35 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Ray Roberts Park Isle Du Bois around 715 PM CDT.
  Pilot Point around 725 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter now!  Get to an
interior room on the lowest floor of a sturdy building and avoid
windows.

&&

LAT...LON 3331 9707 3332 9711 3342 9710 3341 9694
TIME...MOT...LOC 0008Z 201DEG 29KT 3333 9708 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

30

390 
WWUS54 KFWD 010023
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
723 PM CDT Tue Apr 30 2019

TXC121-010032-
/O.EXP.KFWD.TO.W.0020.000000T0000Z-190501T0030Z/
Denton TX-
723 PM CDT Tue Apr 30 2019

...THE TORNADO WARNING FOR NORTH CENTRAL DENTON COUNTY WILL EXPIRE AT
730 PM CDT...
                
The rotation associated with the storm that prompted the Tornado
Warning has weakened, and no longer appears capable of producing a
tornado. Therefore the Tornado Warning will be allowed to expire.
However gusty winds and heavy rain are still possible with this
thunderstorm.

A Tornado Watch remains in effect until 1100 PM CDT for north central
Texas.

LAT...LON 3331 9707 3332 9711 3342 9710 3341 9694
TIME...MOT...LOC 0022Z 212DEG 28KT 3343 9701 

$$

30

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 2:33 PM CDT	Flash Flood Watch	FWD	Collin, Cooke, Dallas, Delta, Denton, Ellis and 20 more	4 days
Apr 30, 2:56 PM CDT	Special Weather Statement	FWD	Stephens	34 min
Apr 30, 3:19 PM CDT	Special Weather Statement	FWD	Palo Pinto	26 min
Apr 30, 4:00 PM CDT	Special Weather Statement	FWD	Hood, Somervell	30 min
Apr 30, 4:05 PM CDT	Special Weather Statement	FWD	Jack	25 min
Apr 30, 4:11 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Palo Pinto, Wise	37 min
Apr 30, 4:27 PM CDT	Special Weather Statement	FWD	Tarrant	33 min
Apr 30, 4:40 PM CDT	Special Weather Statement	FWD	Denton	35 min
Apr 30, 5:17 PM CDT	Special Weather Statement	FWD	Cooke	28 min
Apr 30, 5:17 PM CDT	Tornado Warning	FWD	Parker, Tarrant	43 min
Apr 30, 5:27 PM CDT	Severe Thunderstorm Warning	FWD	Cooke, Denton	63 min
Apr 30, 5:55 PM CDT	Tornado Warning	FWD	Denton, Tarrant, Wise	50 min
Apr 30, 6:26 PM CDT	Flash Flood Warning	FWD	Denton, Tarrant	3 hr
Apr 30, 6:36 PM CDT	Tornado Warning	FWD	Denton, Tarrant	24 min

Nearby

Tornado Warnings in Texas, 2019 Every tornado warning in 2019 Tornadoes in 2019

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.