Alert archive / Texas / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 28, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 19, 2015, 4:46 PM CDT for 4 counties in Texas. It was in force for 44 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
- Apr 19, 2015, 4:46 PM CDT (21:46 UTC)
- Expired
- Apr 19, 2015, 5:30 PM CDT
- In force
- 44 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
Counties Grimes County, TX, Harris County, TX, Waller County, TX, Washington County, TX
The radar
The Houston radar (KHGX), 113 km from the middle of the area, began a volume at 21:47 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 19, 2:31 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.8 hours before the alert went out and 264 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1670 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 122 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 Apr 19, 3:27 PM CDT, 1 hour 19 minutes earlier.
Area forecast discussion, Apr 19, 3:27 PM CDT, 1 hour 19 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 649 AM CDT SUN APR 19 2015 TXZ163-164-176>179-195>200-211>213-227-201200- AUSTIN-BRAZOS-BURLESON-FORT BEND-GRIMES-HARRIS-HOUSTON-LIBERTY- MADISON-MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER- WASHINGTON- 649 AM CDT SUN APR 19 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT A COLD FRONT MOVING INTO THE AREA LATE THIS AFTERNOON MAY BRING ISOLATED STRONG TO SEVERE THUNDERSTORMS BETWEEN 2 AND 6 PM. THE PRIMARY THREAT SHOULD BE STRONG GUSTY WINDS AND POSSIBLY SMALL HAIL. RAINFALL TOTALS SHOULD AVERAGE LESS THAN 0.25 INCH WITH ISOLATED AMOUNTS ASSOCIATED WITH THE STRONGER STORMS AROUND 1 INCH. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. GMZ335-355-TXZ210-214-226-236>238-201200- BRAZORIA-CHAMBERS-COLORADO-GALVESTON-GALVESTON BAY-MATAGORDA- WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM-WHARTON- 649 AM CDT SUN APR 19 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS MAY ARRIVE AFTER 5 PM BRINGING GUSTY NORTHERLY WINDS AND FREQUENT LIGHTNING. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. GMZ330-TXZ235-201200- JACKSON-MATAGORDA BAY- 649 AM CDT SUN APR 19 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. GMZ350-370-375-201200- 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- 649 AM CDT SUN APR 19 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
In the hours before
Local storm report, Apr 19, 4:12 PM CDT, 34 minutes before
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</html>Local storm report, Apr 19, 4:30 PM CDT, 16 minutes before
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</html>The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 8:41 PM CDT | River Flood Warning | HGX | Brazoria | 5 days |
| Apr 18, 8:41 PM CDT | River Flood Warning | HGX | Jackson, Lavaca | 17 hr |
| Apr 18, 8:41 PM CDT | River Flood Warning | HGX | Jackson | 57 hr |
| Apr 18, 9:23 PM CDT | Special Weather Statement | HGX | Brazos, Burleson, Houston, Madison | 52 min |
| Apr 18, 10:15 PM CDT | Special Weather Statement | HGX | Brazos, Grimes, Houston, Madison, Walker, Washington | 60 min |
| Apr 18, 11:04 PM CDT | Special Weather Statement | HGX | Polk, San Jacinto, Trinity | 56 min |
| Apr 18, 11:09 PM CDT | Special Weather Statement | HGX | Austin, Montgomery, Waller | 51 min |
| Apr 18, 11:40 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Polk, San Jacinto, Trinity | 40 min |
| Apr 19, 3:01 PM CDT | Special Weather Statement | HGX | Burleson | 44 min |
| Apr 19, 3:10 PM CDT | Severe Thunderstorm Warning | HGX | Burleson, Washington | 50 min |
| Apr 19, 3:40 PM CDT | Special Weather Statement | HGX | Brazos | 35 min |
| Apr 19, 3:44 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson, Grimes, Washington | 61 min |
| Apr 19, 3:45 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Grimes, Madison | 30 min |
| Apr 19, 4:16 PM CDT | Special Weather Statement | HGX | Washington | 44 min |
| Apr 19, 4:22 PM CDT | Special Weather Statement | HGX | Madison | 23 min |
| Apr 19, 4:35 PM CDT | Special Weather Statement | HGX | Washington | 40 min |
| Apr 19, 4:39 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, Houston, Madison, Walker | 36 min |
| Apr 19, 4:50 PM CDT | Severe Thunderstorm Warning | HGX | Burleson, Washington | 25 min |
| Apr 19, 4:59 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Trinity | 31 min |
| Apr 19, 5:10 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, Walker | 21 min |
| Apr 19, 5:12 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, Harris, Montgomery, Waller | 48 min |
| Apr 19, 5:16 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Trinity, Walker | 29 min |
| Apr 19, 5:29 PM CDT | Special Weather Statement | HGX | Trinity | 31 min |
| Apr 19, 5:32 PM CDT | Special Weather Statement | HGX | Walker | 28 min |
| Apr 19, 5:47 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, Walker | 28 min |
| Apr 19, 5:55 PM CDT | Severe Thunderstorm Warning | HGX | Harris, Montgomery, Waller | 65 min |
| Apr 19, 5:59 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, Harris, Montgomery, Waller | 31 min |
| Apr 19, 6:13 PM CDT | Special Weather Statement | HGX | Waller | 47 min |
| Apr 19, 6:16 PM CDT | Special Weather Statement | HGX | Walker | 29 min |
| Apr 19, 6:21 PM CDT | Special Weather Statement | HGX | Austin | 24 min |
| Apr 19, 6:27 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Colorado, Waller | 33 min |
| Apr 19, 6:31 PM CDT | Areal Flood Advisory | HGX | Harris | 119 min |
| Apr 19, 6:38 PM CDT | Severe Thunderstorm Warning | HGX | Harris, Liberty, Montgomery | 37 min |
| Apr 19, 6:41 PM CDT | Tornado Warning | HGX | Harris, Liberty | 34 min |
| Apr 19, 6:47 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Colorado, Waller | 28 min |
| Apr 19, 6:58 PM CDT | Severe Thunderstorm Warning | HGX | Harris | 47 min |
| Apr 19, 6:59 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Fort Bend, Harris, Waller | 31 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.