Alert archive / Texas / Tornado Warnings in 2015

Tornado Warning 21, NWS Houston/Galveston, TX

May 24, 2015Harris County, Texas

NWS Houston/Galveston, TX issued this tornado warning at May 24, 2015, 6:31 AM CDT for Harris County, Texas. It was in force for 18 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
May 24, 2015, 6:31 AM CDT (11:31 UTC)
Expired
May 24, 2015, 6:49 AM CDT
In force
18 min
Issued by
NWS Houston/Galveston, TX
Area
Storm-based polygon

County Harris County, TX

The radar

The Houston radar (KHGX), 69 km from the middle of the area, began a volume at 11:30 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
May 24, 6:42 AM CDTTSTM WND DMG4 Wsw Bellaire, TXROOF DAMAGE TO 10 BUILDINGS IN THE ROCKPORT APARTMENT COMPLEX ON 5800 BLOCK OF NAIRN.

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

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 11.5 hours before the alert went out and 220 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, Lake Charles Mun, LA at 00:00Z on 2015-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1306 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, Lake Charles Mun, LA at 00:00Z on 2015-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.1939Sfc1 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
1306 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
958 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
0.6
Supercell composite
5.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

716 
WFUS54 KHGX 241131
TORHGX
TXC201-241200-
/O.NEW.KHGX.TO.W.0021.150524T1131Z-150524T1200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
631 AM CDT SUN MAY 24 2015

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY  HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL HARRIS COUNTY IN SOUTHEASTERN TEXAS...

* UNTIL 700 AM CDT
    
* AT 631 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED
  OVER SHARPSTOWN...OR NEAR PINEY POINT VILLAGE...AND MOVING NORTH AT
  40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NORTHERN MISSOURI CITY...BELLAIRE...JERSEY VILLAGE...HUNTERS CREEK
  VILLAGE...BUNKER HILL VILLAGE...PINEY POINT VILLAGE...SPRING
  VALLEY...SPRING BRANCH WEST...GREATER GREENSPOINT...SPRING...
  ALDINE...SPRING BRANCH NORTH...AFTON OAKS / RIVER OAKS AREA...
  NORTHWESTERN NORTHSIDE / NORTHLINE...EASTERN ADDICKS PARK TEN...
  WESTERN MEMORIAL PARK...NORTHWESTERN GREATER HEIGHTS...SOUTHEASTERN
  ELDRIDGE / WEST OAKS...HEDWIG VILLAGE AND HILSHIRE VILLAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE IN A MOBILE
HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND
PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 2963 9551 2964 9555 2968 9563 3016 9556
      3017 9555 3014 9550 3012 9550 3011 9549
      3010 9545 3012 9542 3009 9541 3008 9539
      3009 9538 3004 9531
TIME...MOT...LOC 1131Z 191DEG 35KT 2971 9552 

$$
1 follow-up statement
520 
WWUS54 KHGX 241149
SVSHGX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
649 AM CDT SUN MAY 24 2015

TXC201-241157-
/O.CAN.KHGX.TO.W.0021.000000T0000Z-150524T1200Z/
HARRIS TX-
649 AM CDT SUN MAY 24 2015

...THE TORNADO WARNING FOR CENTRAL HARRIS COUNTY IS CANCELLED...
    
THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING IS NO LONGER SHOWING SIGNIFICANT
ROTATION AND THERE IS NOT CURRENTLY AN IMMENENT THREAT OF A TORNADO. HOWEVER...THE
STORM REMAINS STRONG AND WIND GUSTS TO 45 MPH REMAIN POSSIBLE.

LAT...LON 2963 9551 2964 9555 2968 9563 3016 9556
      3017 9555 3014 9550 3012 9550 3011 9549
      3010 9545 3012 9542 3009 9541 3008 9539
      3009 9538 3004 9531
TIME...MOT...LOC 1146Z 191DEG 35KT 2987 9548 

$$

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 23, 10:33 PM CDTSevere Thunderstorm WarningHGXBurleson27 min
May 23, 11:01 PM CDTSevere Thunderstorm WarningHGXBrazos, Burleson44 min
May 23, 11:59 PM CDTSpecial Weather StatementHGXMadison46 min
May 24, 12:33 AM CDTAreal Flood AdvisoryHGXBrazos, Grimes, Madison, Washington57 min
May 24, 2:41 AM CDTSpecial Marine WarningHGX64 min
May 24, 2:53 AM CDTSevere Thunderstorm WarningHGXJackson52 min
May 24, 3:39 AM CDTSevere Thunderstorm WarningHGXAustin, Colorado, Jackson, Matagorda, Wharton36 min
May 24, 3:42 AM CDTSpecial Marine WarningHGX63 min
May 24, 3:56 AM CDTWind AdvisoryHGXBrazoria, Chambers, Galveston, Jackson, Matagorda14 hr
May 24, 4:20 AM CDTSevere Thunderstorm WarningHGXAustin, Brazoria, Colorado, Fort Bend, Jackson, Matagorda and 3 more55 min
May 24, 4:44 AM CDTSpecial Marine WarningHGX91 min
May 24, 5:16 AM CDTSevere Thunderstorm WarningHGXAustin, Brazoria, Fort Bend, Harris, Matagorda, Montgomery and 2 more59 min
May 24, 5:52 AM CDTSpecial Marine WarningHGX113 min
May 24, 6:02 AM CDTTornado WarningHGXFort Bend, Harris43 min
May 24, 6:08 AM CDTSevere Thunderstorm WarningHGXBrazoria, Fort Bend, Galveston, Harris67 min
May 24, 6:53 AM CDTSpecial Weather StatementHGXMontgomery67 min
May 24, 7:18 AM CDTSpecial Weather StatementHGXChambers, Liberty72 min
May 24, 8:18 AM CDTSpecial Marine WarningHGX87 min
May 24, 8:37 AM CDTSpecial Weather StatementHGXHouston, Polk, Trinity53 min
May 24, 8:55 AM CDTRiver Flood WarningHGXBurleson, Lee6 days
May 24, 3:01 PM CDTFlash Flood WatchHGXAustin, Brazoria, Brazos, Burleson, Chambers, Colorado and 17 more51 hr

Nearby

Tornado Warnings in Texas, 2015Every tornado warning in 2015Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.