A series of thunderstorms produced heavy rainfall over Galveston County, resulting in flooding in the Bacliff area.
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The episode as NWS HGX wrote it up.
A series of thunderstorms produced heavy rainfall over Galveston County, resulting in flooding in the Bacliff area.
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 Jun 4, 11:18 AM CST, 8 minutes earlier.
Area Forecast Discussion National Weather Service Houston/Galveston TX 1218 PM CDT Fri Jun 4 2021 .AVIATION... A cluster of showers and thunderstorms, anchored near the coast will gradually expand inland this afternoon but not much confidence on how far inland as a weak coastal trough is basically stationary and serving as a focus for additional development. No lightning has been reported and lightning will be less common as convection remains low topped. A mix of MVFR/VFR ceilings expected today into this evening with IFR ceilings developing over the north later tonight. Models trending drier for Saturday but will maintain a VCSh for now. 43 && .PREV DISCUSSION... /ISSUED 504 AM CDT Fri Jun 4 2021/ SHORT TERM [Today Through Saturday Night]... Heavy rains moved out into the Gulf last night and early this morning. But a low moving along the coast early this morning is also producing strong gusty onshore winds. These winds should be relaxing by mid morning as low fills in and shifts east. Storms this morning should be focused mainly over the coastal areas. Daytime heating will help in the development of showers and eventually thunderstorms late morning but more likely this afternoon and evening. At this point the short term guidance has really struggled on where rainfall was occurring and where it was to develop and have gone with the assumption that the airmass got worked over big time yesterday with the 2-6" of rain and moisture shifted into the Gulf - the 925-850 flow will be increasing late this afternoon and becoming more southerly pulling back the moisture. Scattered showers and thunderstorms will be possible but the heavy rainfall/greater rates will likely not reach the levels of yesterday. The forecast could need some serious alteration as confidence is low with how this plays out as storms could mainly focus in the Gulf ... with the possibility that coverage is less and lighter inland. Holding off on a Flash Flood Watch for now. Tonight a s/w moves in from the southwest and this will likely lead to an increase in showers and thunderstorms and then surge inland Saturday 8am to 1pm. This may warrant a Flash Flood watch if this continues to be the forecast as the models home in on the solution. Rainfall rates will probably be greater on Saturday gradually shifting east into the nighttime hours. Temperatures will remain on the cooler side with the abundant cloud cover and periods of rain. 45 LONG TERM [Sunday Through Thursday]... The prevailing upper trough will continue its slow westward jog, with its axis reaching SE TX by Sunday. While this will take the area out of the left exit region of the associated upper jet streak (thus losing favorable upper divergence for sustained heavy rainfall), sustained onshore winds will nonetheless continue to supply the area with ample Gulf moisture. Total PWs will remain in the 1.75-2.0 in range on Sunday, with these values persisting into the early part of next week. A series of shortwaves embedded within the upper flow will continue to traverse the base of the longwave trough, resulting in multiple periods of showers and storms on Sunday and Monday. With upper-level support now favoring areas to our east, QPF values across global model solutions diminish and the threat of heavier rainfall diminishes slightly. Despite this, those with any travel or outdoor plans should continue to monitor the latest forecast information as additional clarity should be gained when we enter into the time domain of mesoscale models later this weekend. While the amplitude of the upper trough looks to diminish slightly as it continues its gradual eastward motion into the early part of next week, a tightening of the surface pressure gradient as lee cyclogenesis occurs in the eastern Rockies will increase onshore flow over the Gulf of Mexico. ECMWF indicates a more robust increase of total PWs compared to the GFS, showing 2+ in values over much of SE TX by late Monday. Nonetheless, with values at least in the vicinity of 2 in as additional shortwave axes traverse the region, the potential for locally heavy downpours will continue through Tuesday. WPC has backed off slightly on QPF values in accordance with recent model trends, forecasting values of 3-5" over the next 5 days. That being said, we continue to monitor the potential for flash flooding as this situation evolves in the coming days. Upper ridging will begin to build into the central CONUS, albeit slowly, by mid-week. Despite this, precipitation chances will continue with the support of diurnal processes as moisture availability remains plentiful. Drier conditions look to finally take hold towards the end of the week. Temperature forecast remains similar to the trend of late, with daytime highs generally unchanged in the mid-upper 80s and nighttime lows in the lower to mid-70s. Cady MARINE... Messy with surface low near the coast and have hoisted an SCA for the nearshore waters and Galveston bay. Storms over the Gulf move east and start reloading for the next system arriving from the southwest Saturday. Should be active over the Gulf waters Saturday as this moist axis traverses the coastal waters. Winds of 5-15 knots should prevail through the weekend. 45 && .PRELIMINARY POINT TEMPS/POPS... College Station (CLL) 79 69 80 69 85 / 60 60 80 50 60 Houston (IAH) 80 70 80 71 85 / 70 60 80 40 60 Galveston (GLS) 82 74 80 76 83 / 70 80 80 50 60 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...NONE. GM...NONE. && Discussion...99 Aviation/Marine...99
The Houston radar (KHGX), 9 km away, was scanning. The volume nearest the first event began at 17:24 UTC.
1 flash flood. Local standard time, as filed.
Heavy rain resulted in high water over roadways, making streets impassable. At least 25 structures including many within the Bacliff Villas subdivision were inundated with floodwaters, resulting in water damage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2021Every state in 2021This day in weather historyWarnings in Texas, June 2021
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: 961193.