Alert archive / Texas / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 122, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jun 28, 2015, 4:27 PM CDT for Grimes County, Montgomery County, Walker County, Texas. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 28, 2015, 4:27 PM CDT (21:27 UTC)
- Expired
- Jun 28, 2015, 4:58 PM CDT
- In force
- 31 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
Counties Grimes County, TX, Montgomery County, TX, Walker County, TX
The radar
The Houston radar (KHGX), 131 km from the middle of the area, began a volume at 21:28 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.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.5 hours before the alert went out and 243 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
- 1229 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 723 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 28, 3:01 PM CDT, 1 hour 26 minutes earlier.
Area forecast discussion, Jun 28, 3:01 PM CDT, 1 hour 26 minutes before
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</html>Hazardous weather outlook, Jun 28, 4:21 AM CDT, 12 hours 6 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 421 AM CDT SUN JUN 28 2015 TXZ163-164-176>179-195>200-210>214-226-227-235>238-291300- 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- 421 AM CDT SUN JUN 28 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY INTO THIS EVENING. THE MAIN HAZARD EXPECTED IS LOCALLY HEAVY RAINFALL. HOWEVER...ISOLATED STRONG STORMS MAY GENERATE FREQUENT CLOUD-TO- GROUND LIGHTNING AND STRONG GUSTY WINDS. OTHERWISE...PORTIONS OF THE LOWER TRINITY RIVER IS EXPECTED TO REMAIN IN FLOOD. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY SCATTERED MAINLY DAYTIME SHOWERS AND THUNDERSTORMS ARE POSSIBLE THROUGH WEDNESDAY. ISOLATED STRONG STORMS ARE POSSIBLE WITH THE MAIN IMPACTS CLOUD-TO-GROUND LIGHTNING...LOCALLY HEAVY RAINFALL... AND GUSTY WINDS. THE SHOWER AND THUNDERSTORM OVERAGE IS THEN EXPECTED TO BECOME MORE ISOLATED THURSDAY THROUGH SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED TODAY.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 8:54 PM CDT | Areal Flood Advisory | HGX | Harris | 2 hr |
| Jun 27, 9:43 PM CDT | Flash Flood Warning | HGX | Harris | 3 hr |
| Jun 27, 9:57 PM CDT | Areal Flood Advisory | HGX | Harris, Montgomery, Waller | 2 hr |
| Jun 27, 10:10 PM CDT | Flash Flood Warning | HGX | Harris, Montgomery, Waller | 2 hr |
| Jun 27, 11:34 PM CDT | Areal Flood Advisory | HGX | Harris | 56 min |
| Jun 28, 12:12 AM CDT | Areal Flood Advisory | HGX | Fort Bend, Harris, Waller | 2 hr |
| Jun 28, 12:33 AM CDT | Flash Flood Warning | HGX | Fort Bend, Harris, Waller | 117 min |
| Jun 28, 12:48 AM CDT | Areal Flood Advisory | HGX | Polk, San Jacinto | 117 min |
| Jun 28, 1:25 AM CDT | Areal Flood Advisory | HGX | Grimes, Montgomery | 2 hr |
| Jun 28, 3:29 AM CDT | Areal Flood Advisory | HGX | Liberty, San Jacinto | 2 hr |
| Jun 28, 3:31 AM CDT | Areal Flood Advisory | HGX | Brazos, Grimes, Washington | 119 min |
| Jun 28, 4:59 AM CDT | Flash Flood Warning | HGX | Waller, Washington | 91 min |
| Jun 28, 5:19 AM CDT | Areal Flood Advisory | HGX | Grimes, Harris, Montgomery, Waller, Washington | 56 min |
| Jun 28, 5:27 AM CDT | Areal Flood Advisory | HGX | Harris, Liberty, Montgomery, San Jacinto | 63 min |
| Jun 28, 5:43 AM CDT | Flash Flood Warning | HGX | Grimes, Harris, Montgomery, Waller, Washington | 2 hr |
| Jun 28, 5:52 AM CDT | Flash Flood Warning | HGX | Liberty, Montgomery, San Jacinto | 113 min |
| Jun 28, 6:30 AM CDT | Areal Flood Advisory | HGX | Harris, Montgomery | 2 hr |
| Jun 28, 7:18 AM CDT | Areal Flood Advisory | HGX | Chambers, Harris, Liberty | 117 min |
| Jun 28, 7:40 AM CDT | Flash Flood Warning | HGX | Grimes, Harris, Montgomery, Waller, Washington | 3 hr |
| Jun 28, 8:10 AM CDT | Special Marine Warning | HGX | 65 min | |
| Jun 28, 8:32 AM CDT | Areal Flood Advisory | HGX | Harris, Montgomery | 58 min |
| Jun 28, 8:39 AM CDT | Special Marine Warning | HGX | 96 min | |
| Jun 28, 8:45 AM CDT | Areal Flood Advisory | HGX | Chambers, Harris, Liberty | 2 hr |
| Jun 28, 10:06 AM CDT | Special Marine Warning | HGX | 84 min | |
| Jun 28, 2:25 PM CDT | Special Marine Warning | HGX | 65 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2015Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.