Alert archive / Texas / Tornado Warnings in 2013

Tornado Warning 8, NWS Houston/Galveston, TX

May 10, 2013Brazoria County, Galveston County, Texas

NWS Houston/Galveston, TX issued this tornado warning at May 10, 2013, 11:05 AM CDT for Brazoria County, Galveston County, Texas. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 10, 2013, 11:05 AM CDT (16:05 UTC)
Expired: May 10, 2013, 11:30 AM CDT
In force: 25 min
Issued by: NWS Houston/Galveston, TX
Area: Storm-based polygon

Counties Brazoria County, TX, Galveston County, TX

The radar

The Houston radar (KHGX), 28 km from the middle of the area, began a volume at 16:08 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
May 10, 9:02 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 4.1 hours before the alert went out and 217 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: 18 J/kg
Mixed-layer CIN: -429 J/kg
Mixed-layer LCL: 1127 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: -266 m²/s²
0-3 km storm-relative helicity: -255 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

670 
WFUS54 KHGX 101605
TORHGX
TXC039-167-101630-
/O.NEW.KHGX.TO.W.0008.130510T1605Z-130510T1630Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1105 AM CDT FRI MAY 10 2013

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY  HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN BRAZORIA COUNTY IN SOUTHEAST TEXAS...
  EXTREME SOUTHWESTERN GALVESTON COUNTY IN SOUTHEAST TEXAS...

* UNTIL 1130 AM CDT
    
* AT 1103 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED
  NEAR DANBURY...OR 9 MILES SOUTH OF ALVIN...AND MOVING SOUTHEAST AT
  50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DANBURY...HILLCREST AND LIVERPOOL. 

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 IN A MOBILE HOME OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 2920 9517 2921 9518 2921 9519 2919 9518
      2913 9523 2928 9541 2943 9534 2935 9504
TIME...MOT...LOC 1604Z 300DEG 41KT 2930 9527 

$$

1 follow-up statement

101 
WWUS54 KHGX 101616
SVSHGX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1116 AM CDT FRI MAY 10 2013

TXC039-167-101630-
/O.CON.KHGX.TO.W.0008.000000T0000Z-130510T1630Z/
BRAZORIA TX-GALVESTON TX-
1116 AM CDT FRI MAY 10 2013

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT FOR
NORTHEASTERN BRAZORIA AND EXTREME SOUTHWESTERN GALVESTON COUNTIES...
    
AT 1113 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 9 
MILES SOUTHWEST OF HITCHCOCK...MOVING SOUTHEAST AT 45 MPH. TRAINED 
SPOTTER AT 1114AM REPORTED ROTATION AND WIND GUSTS UP TO 50 MPH WITH 
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
HILLCREST AND LIVERPOOL. 

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 IN A MOBILE HOME OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 2920 9517 2921 9518 2921 9519 2919 9518
      2915 9522 2928 9541 2943 9534 2935 9504
TIME...MOT...LOC 1613Z 300DEG 41KT 2924 9514 

$$

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Houston/Galveston, TX wrote its last area forecast discussion before this tornado warning went out at May 10, 9:27 AM CDT, 1 hour 38 minutes earlier.

Area forecast discussion, May 10, 9:27 AM CDT, 1 hour 38 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
927 AM CDT FRI MAY 10 2013

.UPDATE...
QUICK UPDATE THIS MORNING TO INCLUDE SEVERE THUNDERSTORM WATCH
#155 FOR MOST OF SOUTHEAST TEXAS. WITH THE RAINFALL RECEIVED
DURING THE OVERNIGHT HOURS AND CURRENT RADAR TRENDS HAVE ALSO
EXPANDED THE FLASH FLOOD WATCH FURTHER SOUTH TO INCLUDE HARRIS AND
SURROUNDING COUNTIES. 38

&&

.PRELIMINARY POINT TEMPS/POPS...
COLLEGE STATION (CLL)      80  62  78  59  82 /  70  40  40  10  10
HOUSTON (IAH)              81  64  82  63  83 /  60  50  50  10  10
GALVESTON (GLS)            79  69  79  69  80 /  60  60  60  10  20

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...FLASH FLOOD WATCH UNTIL 6 PM CDT THIS EVENING FOR THE FOLLOWING
     ZONES: FORT BEND...GRIMES...HARRIS...LIBERTY...MONTGOMERY...
     POLK...SAN JACINTO...WALKER...WALLER.

GM...NONE.
&&

DISCUSSION...38
AVIATION/MARINE...45

Hazardous weather outlook, May 10, 5:31 AM CDT, 5 hours 34 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
531 AM CDT FRI MAY 10 2013

TXZ163-164-176>179-195>200-210>214-226-227-235>238-111045-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-
GALVESTON-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA-
MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER-WASHINGTON-
WHARTON-
531 AM CDT FRI MAY 10 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

...LOCALLY HEAVY RAIN AND SLIGHT CHANCE OF SEVERE THUNDERSTORMS
TODAY AND TONIGHT...

.DAY ONE...TODAY AND TONIGHT

THE NEXT UPPER LEVEL DISTURBANCE AND ASSOCIATED SHOWERS AND
THUNDERSTORMS WILL BE MOVING INTO THE REGION FROM CENTRAL TEXAS
LATER THIS MORNING AND AFTERNOON. MOST LOCATIONS WILL SEE AVERAGE
RAINFALL AMOUNTS BETWEEN 1/2 AND 1 INCH. HOWEVER...THE WEATHER
PATTERN ALSO SUPPORTS TRAINING STORMS THAT CAN PRODUCE LOCALIZED
VERY HEAVY RAINFALL. YESTERDAY AND LAST NIGHT...SWATHS OF 3 TO 7
INCH AMOUNTS WERE OBSERVED AND SIMILAR AMOUNTS ARE AGAIN POSSIBLE
TODAY. CONFIDENCE AS TO EXACTLY WHERE AND WHEN THIS WILL OCCUR IS
LOW. LOCATIONS THAT HAVE ALREADY RECEIVED HEAVY RAIN ARE AT A
GREATER RISK OF FLOODING SHOULD SIMILAR DOWNPOURS OCCUR THERE
TODAY.

ANOTHER DISTURBANCE IS FORECAST TO MOVE ACROSS SOUTHERN PARTS OF
THE REGION TONIGHT. AREAS GENERALLY SOUTH OF I-10...AND OFFSHORE...APPEAR
TO HAVE THE BETTER CHANCES OF SEEING HAZARDOUS WEATHER WITH THIS
DISTURBANCE.

THE PRIMARY WEATHER THREAT THROUGH TONIGHT WILL BE FLOODING ASSOCIATED
WITH LOCALIZED HEAVY RAINFALL. A FEW ISOLATED SEVERE STORMS ARE
ALSO POSSIBLE WITH SOME DAMAGING WINDS AND HAIL.

MARINERS SHOULD EXPECT HIGHER WINDS AND SEAS NEAR STORMS...ESPECIALLY
LATER THIS AFTERNOON AND TONIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THE COLD FRONT AND ASSOCIATED SHOWERS AND STORMS DESCRIBED ABOVE
SHOULD PUSH OFFSHORE SATURDAY MORNING AND AFTERNOON...ENDING THE
THREAT OF HAZARDOUS WEATHER.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY. WE ALSO ENCOURAGE REPORTS
OF SIGNIFICANT WEATHER VIA TWITTER. OUR USERNAME IS @NWSHOUSTON.

In the hours before

Local storm report, May 10, 10:29 AM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1029 AM CDT FRI MAY 10 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0956 AM     HAIL             HOUSTON                 29.77N  95.39W
05/10/2013  M1.00 INCH       HARRIS             TX   AMATEUR RADIO

            QUARTER SIZED HAIL AT BELTWAY 8 AND LEE ROAD.

&&

EVENT NUMBER HGX1300072

PK

Local storm report, May 10, 10:31 AM CDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1031 AM CDT FRI MAY 10 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0958 AM     HAIL             HOUSTON                 29.77N  95.39W
05/10/2013  M1.00 INCH       HARRIS             TX   AMATEUR RADIO

            QUARTER SIZED HAIL AT BELTWAY 8 AND OLD HUMBLE ROAD.

&&

EVENT NUMBER HGX1300073

DH

Local storm report, May 10, 10:35 AM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1035 AM CDT FRI MAY 10 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1000 AM     HAIL             HOUSTON                 29.77N  95.39W
05/10/2013  M0.88 INCH       HARRIS             TX   PUBLIC

            NICKEL SIZED HAIL IN FALL CREEK...NORTHEAST HOUSTON BY
            REDSTONE.

&&

EVENT NUMBER HGX1300074

DH

Local storm report, May 10, 10:43 AM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1043 AM CDT FRI MAY 10 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1014 AM     HAIL             HOUSTON                 29.77N  95.39W
05/10/2013  M1.00 INCH       HARRIS             TX   PUBLIC

            QUARTER SIZED HAIL IN ATASCOSITA...NORTHEAST HARRIS
            COUNTY.

&&

EVENT NUMBER HGX1300075

DH

Local storm report, May 10, 10:51 AM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1051 AM CDT FRI MAY 10 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1000 AM     FLOOD            HOUSTON                 29.77N  95.39W
05/10/2013                   HARRIS             TX   TRAINED SPOTTER

            CURB HIGH STREET FLOODING AT GESSNER AND HAMMERLY.

&&

EVENT NUMBER HGX1300076

DH

Special weather statement, May 10, 10:58 AM CDT, 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1058 AM CDT FRI MAY 10 2013

TXZ213-214-101645-
CHAMBERS TX-HARRIS TX-
1058 AM CDT FRI MAY 10 2013

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN CHAMBERS AND SOUTHEASTERN
HARRIS COUNTIES UNTIL 1145 AM CDT...

AT 1054 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM NEAR GALENA PARK...MOVING EAST AT 30 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH WILL BE
POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
PASADENA...BAYTOWN...LA PORTE...CHANNELVIEW...DEER PARK...
CLOVERLEAF...SOUTH HOUSTON...GALENA PARK...JACINTO CITY...
HIGHLANDS...TAYLOR LAKE VILLAGE...EL LAGO...BARRETT...MONT BELVIEU...
ANAHUAC...SHELDON...OLD RIVER-WINFREE...SHOREACRES...MORGAN'S POINT
AND COVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL 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 2954 9469 2952 9474 2953 9477 2969 9469
      2976 9469 2979 9473 2977 9480 2965 9491
      2978 9504 2978 9505 2975 9506 2971 9506
      2973 9503 2968 9498 2964 9502 2960 9498
      2956 9502 2961 9530 2990 9526 2989 9466
TIME...MOT...LOC 1554Z 278DEG 27KT 2971 9521

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:04 PM CDT	Severe Thunderstorm Warning	HGX	Montgomery, Polk, San Jacinto, Walker	41 min
May 9, 7:24 PM CDT	Severe Thunderstorm Warning	HGX	Polk, Trinity	36 min
May 9, 7:36 PM CDT	Severe Thunderstorm Warning	HGX	Polk, San Jacinto	39 min
May 9, 9:11 PM CDT	Special Weather Statement	HGX	Grimes	49 min
May 9, 9:21 PM CDT	Areal Flood Advisory	HGX	Grimes, Madison, Polk, San Jacinto, Trinity, Walker	114 min
May 9, 11:17 PM CDT	Areal Flood Advisory	HGX	San Jacinto, Trinity, Walker	58 min
May 10, 1:11 AM CDT	Special Weather Statement	HGX	Colorado	34 min
May 10, 1:25 AM CDT	Special Weather Statement	HGX	Austin	35 min
May 10, 1:52 AM CDT	Special Weather Statement	HGX	Harris	38 min
May 10, 1:55 AM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend, Harris	35 min
May 10, 2:01 AM CDT	Special Weather Statement	HGX	Austin	29 min
May 10, 2:21 AM CDT	Special Weather Statement	HGX	Waller	39 min
May 10, 2:31 AM CDT	Severe Thunderstorm Warning	HGX	Chambers, Harris, Liberty	44 min
May 10, 2:44 AM CDT	Areal Flood Advisory	HGX	Brazoria, Chambers, Fort Bend, Harris, Liberty	2 hr
May 10, 2:47 AM CDT	Special Marine Warning	HGX		88 min
May 10, 3:13 AM CDT	Flash Flood Warning	HGX	Harris	2 hr
May 10, 3:41 AM CDT	Special Weather Statement	HGX	Chambers	34 min
May 10, 4:18 AM CDT	Flash Flood Watch	HGX	Fort Bend, Grimes, Harris, Liberty, Montgomery, Polk and 3 more	24 hr
May 10, 8:29 AM CDT	Special Weather Statement	HGX	Austin	31 min
May 10, 8:32 AM CDT	Special Weather Statement	HGX	Austin, Waller	43 min
May 10, 8:53 AM CDT	Severe Thunderstorm Warning	HGX	Austin, Waller	37 min
May 10, 9:01 AM CDT	Special Weather Statement	HGX	Brazos	44 min
May 10, 9:09 AM CDT	Special Weather Statement	HGX	Colorado	51 min
May 10, 9:18 AM CDT	Special Weather Statement	HGX	Fort Bend	42 min
May 10, 9:34 AM CDT	Special Weather Statement	HGX	Wharton	41 min
May 10, 9:43 AM CDT	Severe Thunderstorm Warning	HGX	Colorado, Jackson, Wharton	32 min
May 10, 9:49 AM CDT	Areal Flood Advisory	HGX	Austin, Colorado, Fort Bend, Harris, Waller, Wharton	116 min
May 10, 9:54 AM CDT	Severe Thunderstorm Warning	HGX	Harris, Liberty	36 min
May 10, 10:02 AM CDT	Flash Flood Warning	HGX	Austin, Fort Bend, Harris, Waller	3 hr
May 10, 10:02 AM CDT	Severe Thunderstorm Warning	HGX	Fort Bend, Harris	28 min
May 10, 10:11 AM CDT	Special Weather Statement	HGX	Wharton	49 min
May 10, 10:32 AM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend	28 min
May 10, 10:38 AM CDT	Tornado Warning	HGX	Brazoria, Fort Bend	37 min
May 10, 10:55 AM CDT	Special Marine Warning	HGX		95 min
May 10, 10:58 AM CDT	Special Weather Statement	HGX	Chambers	47 min
May 10, 11:00 AM CDT	Special Marine Warning	HGX		90 min
May 10, 11:07 AM CDT	Areal Flood Advisory	HGX	Brazoria, Fort Bend, Galveston, Harris, Matagorda, Wharton	3 hr
May 10, 11:19 AM CDT	Special Weather Statement	HGX	Brazoria, Matagorda	41 min
May 10, 11:25 AM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Chambers, Galveston, Harris	50 min
May 10, 11:38 AM CDT	Special Marine Warning	HGX		37 min
May 10, 11:43 AM CDT	Special Weather Statement	HGX	Chambers	47 min
May 10, 11:46 AM CDT	River Flood Warning	HGX	Harris	139 days
May 10, 12:17 PM CDT	Special Marine Warning	HGX		58 min
May 10, 1:22 PM CDT	Special Marine Warning	HGX		38 min
May 10, 1:30 PM CDT	Special Marine Warning	HGX		30 min
May 10, 1:37 PM CDT	Special Weather Statement	HGX	Chambers	23 min
May 10, 2:26 PM CDT	Special Marine Warning	HGX		49 min
May 10, 2:29 PM CDT	Small Craft Advisory	HGX		91 min
May 10, 3:18 PM CDT	Special Marine Warning	HGX		42 min

Nearby

Tornado Warnings in Texas, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.