A moist tropical air mass moving onshore produced Galveston Bay area funnel clouds.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS HGX wrote it up.
A moist tropical air mass moving onshore produced Galveston Bay area funnel clouds.
The local office's own words before the first event, 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 the first event at Aug 21, 12:03 PM CST, 0 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 103 PM CDT WED AUG 21 2013 .AVIATION... QUIET SO FAR THIS MORNING WITH LIGHT NE TO E FLOW BUT THIS WILL BECOME MORE SOUTHEAST WITH HEATING TODAY. SHOWERS HAVE BEEN FEW AND FAR BETWEEN BUT SOME AREAS OF LOCALIZED CONVERGENCE EAST OF GALVESTON AROUND SMITH POINT AND FROM AROUND LBX TO PSX. EXPECTING A SLOW INLAND PENETRATION GIVEN THE LL FLOW THROUGH MID AFTERNOON THEN SHOULD ACCELERATE BUT MAY OUTRUN THE AVAILABLE MOISTURE AND WEAKEN INLAND DURING THE AFTERNOON. FOR NOW WILL ONLY MENTION VCSH/VCTS FOR HOU TERMINALS SOUTHWARD EARLY THIS AFTERNOON. SKIES SHOULD CLEAR OUT TONIGHT BUT MOISTURE INCREASES FURTHER TOMORROW TO AROUND 2-2.1" AND THE S/W OVER LA AND LA GULF WATERS SHOULD MOVE WEST AND GIVE THE AREA SOME BROAD LIFT AND COMBINED WITH THE PW AND SEABREEZE EXPECT GREATER COVERAGE SCATTERED TOMORROW STARTING NEAR THE COAST AROUND 08-09Z AND SPREADING WEST AND NORTH THROUGH THE MORNING HOURS. WILL CARRY VCSH/VCTS FOR IAH SOUTHWARD AND PROB30 FOR HOU SOUTHWARD. THIS MAY BE NEEDED FOR IAH/CXO AFTER 18Z BUT WILL LIKELY WAIT UNTIL THE 00Z PACKAGE TO ADD IT THAT FAR NORTH. 45 && .PREV DISCUSSION... /ISSUED 958 AM CDT WED AUG 21 2013/ UPDATE... MORNING FORECAST UPDATE. DISCUSSION... LATEST RADAR IMAGERY SHOWS A FEW SHOWERS WAY OUT IN THE GULF BUT REALLY NOT MUCH ACTIVITY THIS MORNING COMPARED TO YESTERDAY. MOISTURE LEVELS SEEM TO BE LOWER WITH PRECIP WATER VALUES AROUND 1.8-1.9 INCHES PER GOES SOUNDER IMAGERY. SFC ANALYSIS SHOWS A WEAK RIDGE AXIS FROM HIGH PRESSURE OVER THE SE U.S. WILL DECREASE POPS THIS MORNING TO 20 PERCENT AS SHOULD GET A FEW SHOWERS LATER THIS MORNING WITH DAY TIME HEATING. WILL KEEP 30 POPS FOR THE AFTERNOON AS HEATING INCREASES MORE. LATEST 12Z HRRR KEEPS MOST OF THE CONVECTION TO SW OF HOUSTON BUT CONVECTION DOES DISSIPATE AROUND 23Z SIMILAR TO YESTERDAY. THINK THAT WILL BE MORE LIKELY THE CASE. UPDATED FORECAST HAS BEEN ISSUED. 39/45 && .PRELIMINARY POINT TEMPS/POPS... COLLEGE STATION (CLL) 98 74 96 75 95 / 20 10 40 30 20 HOUSTON (IAH) 95 73 94 75 94 / 30 10 40 20 30 GALVESTON (GLS) 90 79 88 80 88 / 30 20 40 20 30 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...NONE. GM...NONE. && DISCUSSION...33 AVIATION/MARINE...45
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 447 AM CDT WED AUG 21 2013 TXZ200-213-214-226-227-235>238-221000- BRAZORIA-CHAMBERS-FORT BEND-GALVESTON-HARRIS-JACKSON-LIBERTY- MATAGORDA-WHARTON- 447 AM CDT WED AUG 21 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT CONDITIONS WILL REMAIN FAVORABLE FOR WATERSPOUTS AND FUNNEL CLOUDS ...PARTICULARLY DURING THE MORNING HOURS. OCCASIONALLY THESE FUNNEL CLOUDS MAY EXTEND TO THE GROUND AND BECOME A WEAK AND SHORT LIVED TORNADO. SLOW-MOVING CLUSTERS OF MODERATE TO HEAVY RAINFALL WILL CREATE MINOR FLOODING ISSUES. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY CONDITIONS WILL REMAIN FAVORABLE FOR WATERSPOUTS AND FUNNEL CLOUDS ...PARTICULARLY DURING THE MORNING HOURS. OCCASIONALLY THESE FUNNEL CLOUDS MAY EXTEND TO THE GROUND AND BECOME A WEAK AND SHORT LIVED TORNADO. SLOW-MOVING CLUSTERS OF MODERATE TO HEAVY RAINFALL WILL CREATE MINOR FLOODING ISSUES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. GMZ330-335-350-355-370-375-221000- GALVESTON BAY-MATAGORDA BAY- WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL 20 NM TO 60 NM- WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL OUT 20 NM- WATERS FROM HIGH ISLAND TO FREEPORT 20 TO 60 NM- WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM- 447 AM CDT WED AUG 21 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT WATERSPOUTS AND FUNNEL CLOUDS WILL BE POSSIBLE DURING THE MORNING. MARINERS SHOULD STAY ALERT FOR RAPIDLY CHANGING CONDITIONS WITH APPROACHING STORM CELLS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY WATERSPOUTS AND FUNNEL CLOUDS WILL BE POSSIBLE DURING THE MORNING. MARINERS SHOULD STAY ALERT FOR RAPIDLY CHANGING CONDITIONS WITH APPROACHING STORM CELLS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The Houston radar (KHGX), 26 km away, was scanning. The volume nearest the first event began at 18:05 UTC.
1 funnel cloud. Local standard time, as filed.
Three funnel clouds were sighted over Galveston Bay near the Texas City Dike.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2013Every state in 2013This day in weather historyWarnings in Texas, August 2013
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 462578.