Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 86, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Oct 27, 2021, 8:38 AM CDT for Harris County, Texas. It was in force for 37 min. 4 reports 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
- Oct 27, 2021, 8:38 AM CDT (13:38 UTC)
- Expired
- Oct 27, 2021, 9:15 AM CDT
- In force
- 37 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Harris County, TX
The radar
The Houston radar (KHGX), 52 km from the middle of the area, began a volume at 13:39 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 27, 8:44 AM CDT | TSTM WND DMG | 2 Sw Aldine, TX | STRUCTURE AND TREE DAMAGE WAS OBSERVED NEAR THE INTERSECTION OF AIRLINE RD AND WEST GULF BANK RD. POSSIBLE TORNADO PENDING FURTHER INVESTIGATION. |
| Oct 27, 8:44 AM CDT | TSTM WND DMG | 2 Sw Aldine, TX | CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2 SW ALDINE. UPDATED PREVIOUS TSTM WND DMG REPORT FROM 2 SW ALDINE. LARGE TREE DOWN ONTO HOME WITH SIGNIFICANT DAMAGE ON AIRWAY DRIVE. LITTLE OR NO DAMAGE TO SURROUNDING AREAS, NO DAMAGE PATH. NOT AWARE OF ANY SIGHTIN |
| Oct 27, 8:44 AM CDT | TSTM WND DMG | 2 Sw Aldine, TX | UPDATED PREVIOUS TSTM WND DMG REPORT FROM 2 SW ALDINE. LARGE TREE DOWN ONTO HOME WITH SIGNIFICANT DAMAGE ON AIRWAY DRIVE. LITTLE OR NO DAMAGE TO SURROUNDING AREAS, NO DAMAGE PATH. NOT AWARE OF ANY SIGHTINGS OF FUNNELS REPORTED. KEEPING AS THUNDERSTORM WIND DAM |
| Oct 27, 9:00 AM CDT | TSTM WND DMG | 5 Ese Aldine, TX | TREES DOWN ROSEMARY LANE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 27, 7:55 AM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.6 hours before the alert went out and 212 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.
- Mixed-layer CAPE
- 1422 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 604 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 160 m²/s²
- 0-3 km storm-relative helicity
- 255 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 7.1
The text
As transmitted.
636 WUUS54 KHGX 271338 SVRHGX TXC201-271415- /O.NEW.KHGX.SV.W.0086.211027T1338Z-211027T1415Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Houston/Galveston TX 838 AM CDT Wed Oct 27 2021 The National Weather Service in League City has issued a * Severe Thunderstorm Warning for... Central Harris County in southeastern Texas... * Until 915 AM CDT. * At 837 AM CDT, a severe thunderstorm was located over Greater Inwood, or near Spring Branch North, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Aldine, Cloverleaf, Northside / Northline, Near Northside Houston, Spring Branch North, northern Greater Heights, Greater Greenspoint, Greater Fifth Ward, Channelview, Eastex / Jensen Area, Central Northwest, Northshore, Fairbanks / Northwest Crossing, Langwood, Hunterwood, El Dorado / Oates Prairie, Hidden Valley, Acres Home, Independence Heights and Settegast. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Tornado Watch remains in effect until 400 PM CDT for southeastern Texas. Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. && LAT...LON 2982 9554 2992 9554 2996 9515 2977 9515 TIME...MOT...LOC 1337Z 269DEG 35KT 2987 9548 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 26, 10:39 PM CDT | Rip Current Statement | HGX | Brazoria, Galveston, Matagorda | 21 hr |
| Oct 27, 6:10 AM CDT | Special Marine Warning | HGX | 50 min | |
| Oct 27, 6:44 AM CDT | Special Weather Statement | HGX | Austin, Brazos, Grimes, Madison, Washington | 46 min |
| Oct 27, 6:56 AM CDT | Special Marine Warning | HGX | 34 min | |
| Oct 27, 6:58 AM CDT | Special Marine Warning | HGX | 32 min | |
| Oct 27, 7:23 AM CDT | Special Marine Warning | HGX | 37 min | |
| Oct 27, 7:31 AM CDT | Special Weather Statement | HGX | Austin, Colorado, Grimes, Jackson, Montgomery, Walker and 3 more | 44 min |
| Oct 27, 8:06 AM CDT | Tornado Warning | HGX | Harris, Montgomery | 24 min |
| Oct 27, 8:09 AM CDT | Special Marine Warning | HGX | 66 min | |
| Oct 27, 8:09 AM CDT | Special Marine Warning | HGX | 66 min | |
| Oct 27, 8:16 AM CDT | Tornado Warning | HGX | Harris | 29 min |
| Oct 27, 8:28 AM CDT | Special Weather Statement | HGX | Brazoria, Fort Bend, Harris, Liberty, Matagorda, Montgomery and 4 more | 92 min |
| Oct 27, 8:48 AM CDT | Tornado Warning | HGX | Harris, Liberty, Montgomery | 27 min |
| Oct 27, 8:55 AM CDT | Tornado Warning | HGX | Harris, Liberty | 35 min |
| Oct 27, 8:57 AM CDT | Special Marine Warning | HGX | 93 min | |
| Oct 27, 9:16 AM CDT | Severe Thunderstorm Warning | HGX | Harris | 29 min |
| Oct 27, 9:23 AM CDT | Severe Thunderstorm Warning | HGX | Chambers, Harris, Liberty | 37 min |
| Oct 27, 9:31 AM CDT | Special Marine Warning | HGX | 119 min | |
| Oct 27, 9:52 AM CDT | Special Weather Statement | HGX | Chambers, Galveston | 53 min |
| Oct 27, 9:58 AM CDT | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 32 min |
| Oct 27, 11:31 AM CDT | Special Marine Warning | HGX | 29 min | |
| Oct 27, 11:51 AM CDT | Special Marine Warning | HGX | 84 min | |
| Oct 27, 3:05 PM CDT | Wind Advisory | HGX | Austin, Brazoria, Brazos, Burleson, Chambers, Colorado and 17 more | 28 hr |
| Oct 27, 3:26 PM CDT | Gale Warning | HGX | 36 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 2021Every severe thunderstorm warning in 2021
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.