Alert archive / Texas / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 21, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Mar 28, 2018, 11:01 AM CDT for San Jacinto County, Walker County, Texas. It was in force for 29 min. 1 report 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
- Mar 28, 2018, 11:01 AM CDT (16:01 UTC)
- Expired
- Mar 28, 2018, 11:30 AM CDT
- In force
- 29 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties San Jacinto County, TX, Walker County, TX
The radar
The Houston radar (KHGX), 132 km from the middle of the area, began a volume at 16:01 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 |
|---|---|---|---|
| Mar 28, 11:15 AM CDT | TSTM WND DMG | 1 S Dodge, TX | TREES DOWN ON FM 405 SOUTH OF DODGE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 4.0 hours before the alert went out and 220 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
- 295 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 650 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 159 m²/s²
- 0-3 km storm-relative helicity
- 215 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.6
The text
As transmitted.
112 WUUS54 KHGX 281601 SVRHGX TXC407-471-281630- /O.NEW.KHGX.SV.W.0021.180328T1601Z-180328T1630Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Houston/Galveston TX 1101 AM CDT WED MAR 28 2018 The National Weather Service in League City has issued a * Severe Thunderstorm Warning for... Northwestern San Jacinto County in southeastern Texas... Southeastern Walker County in southeastern Texas... * Until 1130 AM CDT. * At 1100 AM CDT, a severe thunderstorm was located over Huntsville State Park, or near Huntsville, moving northeast at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to siding, and trees. * Locations impacted include... Huntsville, New Waverly, Huntsville State Park, Oakhurst and Evergreen. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Damaging winds and continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. && LAT...LON 3051 9552 3067 9562 3087 9526 3053 9520 TIME...MOT...LOC 1600Z 242DEG 37KT 3063 9549 HAIL...<.75IN WIND...60MPH $$
1 follow-up statement
398 WWUS54 KHGX 281619 SVSHGX Severe Weather Statement National Weather Service Houston/Galveston TX 1119 AM CDT WED MAR 28 2018 TXC407-471-281630- /O.CON.KHGX.SV.W.0021.000000T0000Z-180328T1630Z/ San Jacinto TX-Walker TX- 1119 AM CDT WED MAR 28 2018 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 AM CDT FOR NORTHWESTERN SAN JACINTO AND EAST CENTRAL WALKER COUNTIES... At 1118 AM CDT, a severe thunderstorm was located near Point Blank, or 14 miles east of Huntsville, moving northeast at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Law enforcement. Downed trees were reported near Dodge. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Oakhurst. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. && LAT...LON 3057 9534 3074 9542 3083 9525 3060 9521 TIME...MOT...LOC 1618Z 246DEG 34KT 3069 9531 HAIL...<.75IN WIND...60MPH $$
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 8:16 PM CDT | Special Weather Statement | HGX | Madison | 29 min |
| Mar 27, 11:10 PM CDT | Special Weather Statement | HGX | Houston | 50 min |
| Mar 27, 11:24 PM CDT | Areal Flood Advisory | HGX | Houston | 66 min |
| Mar 27, 11:52 PM CDT | Special Weather Statement | HGX | Houston | 23 min |
| Mar 28, 7:52 AM CDT | Special Weather Statement | HGX | Washington | 38 min |
| Mar 28, 10:51 AM CDT | Areal Flood Advisory | HGX | Brazos, Burleson, Grimes, Montgomery, San Jacinto, Trinity and 2 more | 54 min |
| Mar 28, 11:28 AM CDT | Severe Thunderstorm Warning | HGX | Polk, San Jacinto, Trinity | 32 min |
| Mar 28, 11:59 AM CDT | Special Weather Statement | HGX | Polk | 46 min |
| Mar 28, 12:20 PM CDT | Special Weather Statement | HGX | Brazos, Burleson, Washington | 55 min |
| Mar 28, 1:06 PM CDT | Special Weather Statement | HGX | Madison | 39 min |
| Mar 28, 1:20 PM CDT | Special Weather Statement | HGX | Brazos, Burleson | 25 min |
| Mar 28, 1:32 PM CDT | Areal Flood Advisory | HGX | Brazos, Burleson, Grimes, Madison, Walker, Washington | 3 hr |
| Mar 28, 2:00 PM CDT | Flash Flood Warning | HGX | Brazos, Burleson, Grimes, Washington | 2 hr |
| Mar 28, 2:17 PM CDT | Special Weather Statement | HGX | Polk | 28 min |
| Mar 28, 2:39 PM CDT | Special Weather Statement | HGX | Austin | 36 min |
| Mar 28, 3:06 PM CDT | Special Weather Statement | HGX | Colorado | 39 min |
| Mar 28, 4:19 PM CDT | Special Weather Statement | HGX | Waller | 26 min |
| Mar 28, 4:37 PM CDT | Severe Thunderstorm Warning | HGX | Fort Bend, Harris, Waller | 23 min |
| Mar 28, 4:42 PM CDT | Areal Flood Advisory | HGX | Austin, Fort Bend, Harris, Montgomery, Waller | 63 min |
| Mar 28, 4:59 PM CDT | Special Weather Statement | HGX | Harris | 31 min |
| Mar 28, 5:10 PM CDT | Areal Flood Advisory | HGX | Harris, Liberty, Montgomery, San Jacinto | 50 min |
| Mar 28, 5:27 PM CDT | Special Weather Statement | HGX | Harris | 33 min |
| Mar 28, 5:30 PM CDT | Tornado Warning | HGX | Harris | 15 min |
| Mar 28, 5:36 PM CDT | River Flood Warning | HGX | Trinity, Walker | 5 days |
| Mar 28, 6:00 PM CDT | Areal Flood Advisory | HGX | Harris, Liberty, Montgomery, San Jacinto | 60 min |
| Mar 28, 6:32 PM CDT | Areal Flood Advisory | HGX | Liberty, Polk, San Jacinto | 58 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2018Every severe thunderstorm warning in 2018
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.