Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 220, NWS Fort Worth, TX

May 18, 2015Lampasas County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at May 18, 2015, 5:05 PM CDT for Lampasas County, Texas. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 18, 2015, 5:05 PM CDT (22:05 UTC)
Expired
May 18, 2015, 5:33 PM CDT
In force
28 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Lampasas County, TX

The radar

The Ft Hood radar (KGRK), 97 km from the middle of the area, began a volume at 22:08 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

Del Rio, TX (KDLF), launched 12:00Z, 10.1 hours before the alert went out and 322 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, Del Rio, TX at 12:00Z on 2015-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2490 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, Del Rio, TX at 12:00Z on 2015-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.193958Sfc1 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
2490 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
542 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.2

Open this sounding in Storm Lab

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 May 18, 3:34 PM CDT, 1 hour 31 minutes earlier.

Area forecast discussion, May 18, 3:34 PM CDT, 1 hour 31 minutes before
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Hazardous weather outlook, May 18, 3:20 PM CDT, 1 hour 45 minutes before
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In the hours before

Special weather statement, May 18, 3:19 PM CDT, 1 hour 46 minutes before
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Special weather statement, May 18, 3:59 PM CDT, 1 hour 6 minutes before
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Special weather statement, May 18, 4:15 PM CDT, 50 minutes before
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Local storm report, May 18, 4:32 PM CDT, 33 minutes before
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Special weather statement, May 18, 4:37 PM CDT, 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
437 PM CDT MON MAY 18 2015

TXZ130-143-144-182215-
HAMILTON TX-BOSQUE TX-ERATH TX-
437 PM CDT MON MAY 18 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL HAMILTON...
SOUTHEASTERN ERATH AND NORTHWESTERN BOSQUE COUNTIES UNTIL 515 PM
CDT...

AT 436 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
IREDELL...OR 21 MILES SOUTHEAST OF STEPHENVILLE...MOVING EAST AT 25
MPH.

HALF INCH HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
HICO...IREDELL AND WALNUT SPRINGS.

LAT...LON 3216 9803 3213 9789 3209 9787 3212 9781
      3209 9767 3185 9778 3194 9801 3199 9812
TIME...MOT...LOC 2136Z 276DEG 21KT 3205 9791

AJS
Special weather statement, May 18, 4:56 PM CDT, 9 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
456 PM CDT MON MAY 18 2015

TXZ147-161-182245-
LIMESTONE TX-FREESTONE TX-
456 PM CDT MON MAY 18 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LIMESTONE AND
FREESTONE COUNTIES UNTIL 545 PM CDT...

AT 455 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
MEXIA...MOVING EAST AT 15 MPH.

WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
MEXIA...GROESBECK...TEAGUE...FAIRFIELD...WORTHAM...FAIRFIELD LAKE
STATE PARK...FORT PARKER STATE PARK...TEHUACANA AND KIRVIN.

THIS INCLUDES INTERSTATE 45 BETWEEN MILE MARKERS 181 AND 209.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3149 9606 3145 9617 3156 9667 3181 9662
      3180 9650 3185 9639 3183 9600
TIME...MOT...LOC 2155Z 283DEG 19KT 3164 9642

AJS

The office that day

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

IssuedProductOfficeCountiesLasted
May 17, 7:05 PM CDTAreal Flood WarningFWDEllis12 hr
May 18, 6:51 AM CDTRiver Flood WarningFWDWise20 hr
May 18, 7:56 AM CDTAreal Flood AdvisoryFWDLeon, Robertson3 hr
May 18, 10:32 AM CDTRiver Flood WarningFWDDelta, Hopkins14 days
May 18, 3:19 PM CDTSpecial Weather StatementFWDBosque41 min
May 18, 3:45 PM CDTSevere Thunderstorm WarningFWDGrayson45 min
May 18, 3:59 PM CDTSpecial Weather StatementFWDBosque46 min
May 18, 4:13 PM CDTAreal Flood AdvisoryFWDRobertson2 hr
May 18, 4:15 PM CDTSpecial Weather StatementFWDRobertson45 min
May 18, 4:37 PM CDTSpecial Weather StatementFWDSomervell38 min
May 18, 4:46 PM CDTAreal Flood AdvisoryFWDFreestone, Limestone119 min
May 18, 4:50 PM CDTSevere Thunderstorm WarningFWDBosque, Erath, Somervell40 min
May 18, 4:56 PM CDTSpecial Weather StatementFWDFreestone, Limestone49 min
May 18, 5:16 PM CDTSpecial Weather StatementFWDCoryell44 min
May 18, 5:47 PM CDTSpecial Weather StatementFWDLimestone43 min
May 18, 6:05 PM CDTSpecial Weather StatementFWDMills40 min
May 18, 6:34 PM CDTSpecial Weather StatementFWDMcLennan41 min
May 18, 6:42 PM CDTAreal Flood AdvisoryFWDBell, Coryell, Falls, McLennan2 hr
May 18, 6:57 PM CDTSevere Thunderstorm WarningFWDBell, Coryell, Falls, McLennan48 min

Nearby

Severe Thunderstorm Warnings in Texas, 2015Every severe thunderstorm warning in 2015

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.