Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Fort Worth, TX

March 18, 2018Milam County, Robertson County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Mar 18, 2018, 4:03 PM CDT for Milam County, Robertson County, Texas. It was in force for 57 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
Mar 18, 2018, 4:03 PM CDT (21:03 UTC)
Expired
Mar 18, 2018, 5:00 PM CDT
In force
57 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Milam County, TX, Robertson County, TX

The radar

The Ft Hood radar (KGRK), 65 km from the middle of the area, began a volume at 21:03 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

TimeReportWhereRemark
Mar 18, 4:20 PM CDTHAIL 1Minerva, TX
Mar 18, 4:30 PM CDTHAIL 15 N Milano, TX

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

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 9.1 hours before the alert went out and 237 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-pSkew-T log-p diagram, Fort Worth, TX at 12:00Z on 2018-03-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 177 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 12:00Z on 2018-03-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 182 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
177 J/kg
Mixed-layer CIN
-144 J/kg
Mixed-layer LCL
537 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
182 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

As transmitted.

405 
WUUS54 KFWD 182103
SVRFWD
TXC331-395-182200-
/O.NEW.KFWD.SV.W.0021.180318T2103Z-180318T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Fort Worth TX
403 PM CDT SUN MAR 18 2018

The National Weather Service in Fort Worth has issued a

* Severe Thunderstorm Warning for...
  Southern Robertson County in central Texas...
  Milam County in central Texas...

* Until 500 PM CDT.

* At 402 PM CDT, a severe thunderstorm was located near Rockdale,
  moving northeast at 50 mph.

  HAZARD...60 mph wind gusts and half dollar size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Rockdale, Cameron, Hearne, Franklin, Thorndale, Calvert and Milano.

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 3046 9715 3073 9727 3119 9639 3094 9630
      3087 9639 3075 9646 3070 9656 3073 9662
TIME...MOT...LOC 2102Z 239DEG 44KT 3070 9707 

HAIL...1.25IN
WIND...60MPH
 
$$

30
2 follow-up statements
278 
WWUS54 KFWD 182122
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
422 PM CDT SUN MAR 18 2018

TXC331-395-182200-
/O.CON.KFWD.SV.W.0021.000000T0000Z-180318T2200Z/
Robertson TX-Milam TX-
422 PM CDT SUN MAR 18 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR SOUTHERN ROBERTSON AND CENTRAL MILAM COUNTIES...

At 420 PM CDT, a severe thunderstorm was located 7 miles southeast 
of Cameron, moving northeast at 35 mph. A second storm capable of 
producing quarter-sized hail was located just south of Thorndale, 
also moving northeast at 35 MPH.

HAZARD...60 mph wind gusts and half dollar size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Rockdale, Hearne, Franklin, Thorndale, Calvert and Milano. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3059 9721 3065 9723 3114 9649 3119 9639
      3094 9630 3087 9639 3075 9646 3070 9656
      3073 9662 3046 9715
TIME...MOT...LOC 2120Z 242DEG 30KT 3076 9691 

HAIL...1.25IN
WIND...60MPH
 
$$

30
010 
WWUS54 KFWD 182137
SVSFWD

Severe Weather Statement
National Weather Service Fort Worth TX
437 PM CDT SUN MAR 18 2018

TXC331-395-182200-
/O.CON.KFWD.SV.W.0021.000000T0000Z-180318T2200Z/
Robertson TX-Milam TX-
437 PM CDT SUN MAR 18 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR SOUTHERN ROBERTSON AND EAST CENTRAL MILAM COUNTIES...

At 437 PM CDT, a severe thunderstorm was located 11 miles southwest
of Hearne, moving east at 35 mph.

HAZARD...60 mph wind gusts and half dollar size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Hearne, Franklin, Calvert and Milano. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3066 9680 3080 9699 3113 9637 3094 9630
      3087 9639 3075 9646 3072 9653 3071 9657
      3073 9662 3067 9673
TIME...MOT...LOC 2137Z 253DEG 30KT 3078 9675 

HAIL...1.25IN
WIND...60MPH
 
$$

30

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 17, 7:19 PM CDTSpecial Weather StatementFWDRobertson41 min
Mar 17, 7:22 PM CDTSevere Thunderstorm WarningFWDFalls, Leon, Limestone, Robertson53 min
Mar 17, 7:27 PM CDTSpecial Weather StatementFWDFalls33 min
Mar 17, 7:43 PM CDTSpecial Weather StatementFWDRobertson32 min
Mar 17, 7:56 PM CDTSpecial Weather StatementFWDBell34 min
Mar 17, 8:00 PM CDTSevere Thunderstorm WarningFWDBell, Milam40 min
Mar 17, 8:16 PM CDTSpecial Weather StatementFWDLeon29 min
Mar 17, 8:20 PM CDTSevere Thunderstorm WarningFWDLeon55 min
Mar 17, 9:15 PM CDTSpecial Weather StatementFWDMilam45 min
Mar 18, 12:01 AM CDTAreal Flood AdvisoryFWDAnderson, Leon119 min
Mar 18, 3:52 AM CDTFire Weather WatchFWDComanche, Coryell, Eastland, Erath, Hamilton, Lampasas and 4 more24 hr
Mar 18, 4:35 PM CDTSpecial Weather StatementFWDBosque40 min
Mar 18, 4:39 PM CDTSevere Thunderstorm WarningFWDBosque51 min
Mar 18, 4:54 PM CDTSevere Thunderstorm WarningFWDRobertson36 min
Mar 18, 5:14 PM CDTSevere Thunderstorm WarningFWDHill, Johnson61 min
Mar 18, 5:23 PM CDTSevere Thunderstorm WarningFWDBosque, Hill, McLennan67 min
Mar 18, 5:27 PM CDTTornado WarningFWDBosque, Hill33 min
Mar 18, 5:39 PM CDTSevere Thunderstorm WarningFWDMilam, Robertson66 min
Mar 18, 6:24 PM CDTSevere Thunderstorm WarningFWDHill, Limestone, McLennan, Navarro66 min

Nearby

Severe Thunderstorm Warnings in Texas, 2018Every severe thunderstorm warning in 2018

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.