Alert archive / Texas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 221, NWS Fort Worth, TX

May 18, 20154 counties in Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at May 18, 2015, 6:57 PM CDT for 4 counties in Texas. It was in force for 48 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, 6:57 PM CDT (23:57 UTC)
Expired: May 18, 2015, 7:45 PM CDT
In force: 48 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Bell County, TX, Coryell County, TX, Falls County, TX, McLennan County, TX

The radar

The Ft Hood radar (KGRK), 65 km from the middle of the area, began a volume at 23:57 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

Shreveport, LA (KBAD), launched 12:00Z, 12.0 hours before the alert went out and 364 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: 840 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 899 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

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, 3 hours 23 minutes earlier.

Area forecast discussion, May 18, 3:34 PM CDT, 3 hours 23 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, May 18, 6:07 PM CDT, 50 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
607 PM CDT MON MAY 18 2015

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-191130-
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-
607 PM CDT MON MAY 18 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL TEXAS.

.DAY ONE...TONIGHT.

SCATTERED THUNDERSTORMS ARE POSSIBLE THIS EVENING AND TONIGHT. A
BRIEF STRONG TO SEVERE STORM IS POSSIBLE THROUGH SUNSET.
GUSTY DOWNBURST WINDS...FREQUENT LIGHTNING...AND HEAVY RAINFALL
LEADING TO MINOR FLOODING WILL BE THE MAIN HAZARDS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THUNDERSTORM CHANCES WILL INCREASE ACROSS THE AREA TUESDAY
AFTERNOON INTO TUESDAY NIGHT. A FEW STORMS COULD BRIEFLY REACH
STRONG TO SEVERE LIMITS WITH HAIL...DAMAGING WINDS...AND FREQUENT
LIGHTING. LOCALLY HEAVY RAINFALL ON TOP OF SATURATED SOILS MAY
POSE A FLOODING PROBLEM...ESPECIALLY NORTHWEST OF A COMANCHE...
MINERAL WELLS...GAINESVILLE LINE WHERE RAINFALL AMOUNTS IN EXCESS
OF AN INCH ARE EXPECTED.

A CHANCE OF THUNDERSTORMS WILL CONTINUE ACROSS ALL OF NORTH TEXAS
WEDNESDAY THROUGH SUNDAY. ISOLATED AREAS OF SEVERE WEATHER WILL
BE POSSIBLE EACH DAY...ALONG WITH A POTENTIAL FOR LOCALIZED HEAVY
RAIN AND FLOODING. SEVERE WEATHER CHANCES WILL INCREASE THIS
COMING WEEKEND...THOUGH MANY UNCERTAINTIES EXIST ON OVERALL
THREATS AND SYSTEM EVOLUTION AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
LIMITED SPOTTER ACTIVATION MAY BE REQUESTED MAINLY SOUTH OF
INTERSTATE 20 THIS EVENING.

JLDUNN

In the hours before

Special weather statement, May 18, 4:37 PM CDT, 2 hours 20 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, 2 hours 1 minute 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

Special weather statement, May 18, 5:16 PM CDT, 1 hour 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
516 PM CDT MON MAY 18 2015

TXZ157-159-182300-
MCLENNAN TX-CORYELL TX-
516 PM CDT MON MAY 18 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CORYELL AND
SOUTHWESTERN MCLENNAN COUNTIES UNTIL 600 PM CDT...

AT 514 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 8
MILES NORTHEAST OF FORT GATES...OR 8 MILES EAST OF GATESVILLE...
MOVING EAST AT 15 MPH.

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

LOCATIONS IMPACTED INCLUDE...
WACO...GATESVILLE...MCGREGOR...CRAWFORD...FORT GATES...OGLESBY AND
SOUTH MOUNTAIN.

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 3141 9776 3160 9773 3162 9763 3159 9761
      3159 9760 3163 9752 3166 9730 3133 9730
TIME...MOT...LOC 2214Z 274DEG 14KT 3148 9759

AJS

Special weather statement, May 18, 5:47 PM CDT, 1 hour 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
547 PM CDT MON MAY 18 2015

TXZ161-182330-
LIMESTONE TX-
547 PM CDT MON MAY 18 2015

...SIGNIFICANT WEATHER ADVISORY FOR LIMESTONE COUNTY UNTIL 630 PM
CDT...

AT 546 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
GROESBECK...MOVING SOUTHEAST AT 15 MPH.

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

LOCATIONS IMPACTED INCLUDE...
MEXIA...GROESBECK...COOLIDGE...FORT PARKER STATE PARK...THORNTON AND
TEHUACANA.

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.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3174 9687 3181 9672 3179 9650 3141 9624
      3138 9632 3135 9632 3125 9653
TIME...MOT...LOC 2246Z 323DEG 15KT 3154 9652

AJS

Special weather statement, May 18, 6:05 PM CDT, 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
605 PM CDT MON MAY 18 2015

TXZ142-156-182345-
LAMPASAS TX-MILLS TX-
605 PM CDT MON MAY 18 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN LAMPASAS AND EASTERN
MILLS COUNTIES UNTIL 645 PM CDT...

AT 605 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 9
MILES EAST OF GOLDTHWAITE...OR 22 MILES NORTHEAST OF SAN SABA...
MOVING NORTHWEST AT 15 MPH.

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

LOCATIONS IMPACTED INCLUDE...
GOLDTHWAITE.

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.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3143 9872 3165 9845 3163 9842 3142 9827
      3146 9819 3144 9816 3141 9814 3126 9830
      3138 9870 3139 9869 3141 9870 3140 9872
      3141 9873 3142 9873
TIME...MOT...LOC 2305Z 117DEG 13KT 3140 9841

AJS

Special weather statement, May 18, 6:34 PM CDT, 23 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
634 PM CDT MON MAY 18 2015

TXZ157>160-190015-
MCLENNAN TX-BELL TX-CORYELL TX-FALLS TX-
634 PM CDT MON MAY 18 2015

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL FALLS...NORTHEASTERN
BELL...EAST CENTRAL CORYELL AND SOUTHWESTERN MCLENNAN COUNTIES UNTIL
715 PM CDT...

AT 633 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
BRUCEVILLE-EDDY...OR 12 MILES SOUTH OF HEWITT...MOVING WEST AT 10
MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
MCGREGOR...LORENA...TROY...BRUCEVILLE-EDDY...MOODY...LOTT...GOLINDA
AND MOTHER NEFF STATE PARK.

THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 306 AND 323.

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.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3119 9753 3144 9750 3138 9698 3116 9702
TIME...MOT...LOC 2333Z 096DEG 11KT 3128 9726

AJS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 7:05 PM CDT	Areal Flood Warning	FWD	Ellis	12 hr
May 18, 6:51 AM CDT	River Flood Warning	FWD	Wise	20 hr
May 18, 7:56 AM CDT	Areal Flood Advisory	FWD	Leon, Robertson	3 hr
May 18, 10:32 AM CDT	River Flood Warning	FWD	Delta, Hopkins	14 days
May 18, 3:19 PM CDT	Special Weather Statement	FWD	Bosque	41 min
May 18, 3:45 PM CDT	Severe Thunderstorm Warning	FWD	Grayson	45 min
May 18, 3:59 PM CDT	Special Weather Statement	FWD	Bosque	46 min
May 18, 4:13 PM CDT	Areal Flood Advisory	FWD	Robertson	2 hr
May 18, 4:15 PM CDT	Special Weather Statement	FWD	Robertson	45 min
May 18, 4:37 PM CDT	Special Weather Statement	FWD	Somervell	38 min
May 18, 4:46 PM CDT	Areal Flood Advisory	FWD	Freestone, Limestone	119 min
May 18, 4:50 PM CDT	Severe Thunderstorm Warning	FWD	Bosque, Erath, Somervell	40 min
May 18, 4:56 PM CDT	Special Weather Statement	FWD	Freestone, Limestone	49 min
May 18, 5:05 PM CDT	Severe Thunderstorm Warning	FWD	Lampasas	28 min
May 18, 5:16 PM CDT	Special Weather Statement	FWD	Coryell	44 min
May 18, 5:47 PM CDT	Special Weather Statement	FWD	Limestone	43 min
May 18, 6:05 PM CDT	Special Weather Statement	FWD	Mills	40 min
May 18, 6:34 PM CDT	Special Weather Statement	FWD	McLennan	41 min
May 18, 6:42 PM CDT	Areal Flood Advisory	FWD	Bell, Coryell, Falls, McLennan	2 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2015 Every 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.