Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 47, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Apr 16, 2001, 4:31 PM CDT for Brazoria County, Fort Bend County, Texas. It was in force for 44 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 16, 2001, 4:31 PM CDT (21:31 UTC)
- Expired
- Apr 16, 2001, 5:15 PM CDT
- In force
- 44 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Brazoria County, TX, Fort Bend County, TX
The radar
The Houston radar (KHGX), 53 km from the middle of the area, began a volume at 21:35 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 |
|---|---|---|---|
| Apr 16, 4:35 PM CDT | Hail 0.75 | Manvel, TX | |
| Apr 16, 4:35 PM CDT | Hail 0.75 | Sugarland, TX | |
| Apr 16, 4:45 PM CDT | Thunderstorm Wind | Countywide, TX | Numerous trees and power lines down across county. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 9.5 hours before the alert went out and 247 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
- 728 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 727 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -59 m²/s²
- 0-3 km storm-relative helicity
- -19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 16, 2:25 PM CDT, 2 hours 6 minutes earlier.
Area forecast discussion, Apr 16, 2:25 PM CDT, 2 hours 6 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 225 PM CDT MON APR 16 2001 QUICK DISCUSSION THIS AFTERNOON DUE TO SEVERE STORMS. VERY SHORT TERM...SEE THE 940 AM DISCUSSION IT'S HAPPENING NOW. QUARTER TO GOLFBALL-SIZE HAIL REPORTED IN WINNIE BETWEEN 205 AND 220 PM. LATER TONIGHT AND TUE...PREFER AND AVN/ETA BLEND...THEN THE ETA OUT TO 60 HR AS THE AVN OVERPLAYS THE SECONDARY SHORTWAVE IN THE NW FLOW ON WED. FWC/MAV TEMPS SEEMS A BIT TOO WARM FROM TUE AFT-THU AM. GRUMM/HART ANOMALIES ARE AROUND 2 STD BELOW THE MEAN...WHICH SHOULD GENERATE HIGHS IN THE MID TO UPPER 60S AND LOWS IN THE LOWER 40S INLAND. EXTENDED...THE MRF IS MOSTLQY ON TRACK...NO POPS WED-SAT...SLIGHT CHANCE SUN/MON. .HGX...NONE. 31/47/DO PRELIMS... CLL CB 055/066 044/068 050 530 IAH CB 057/068 045/068 050 530 GLS CB 066/070 055/067 058 530
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 7:19 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Grimes | 26 min |
| Apr 15, 8:07 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, Montgomery | 38 min |
| Apr 15, 8:35 PM CDT | Severe Thunderstorm Warning | HGX | Burleson, Washington | 55 min |
| Apr 15, 8:47 PM CDT | Severe Thunderstorm Warning | HGX | Montgomery | 43 min |
| Apr 15, 9:24 PM CDT | Severe Thunderstorm Warning | HGX | Harris | 36 min |
| Apr 15, 9:29 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Washington | 46 min |
| Apr 16, 1:55 PM CDT | Severe Thunderstorm Warning | HGX | Chambers | 50 min |
| Apr 16, 2:45 PM CDT | Severe Thunderstorm Warning | HGX | Chambers | 60 min |
| Apr 16, 2:51 PM CDT | Severe Thunderstorm Warning | HGX | Harris | 54 min |
| Apr 16, 3:33 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, Washington | 27 min |
| Apr 16, 3:39 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Fort Bend, Harris | 51 min |
| Apr 16, 3:49 PM CDT | Severe Thunderstorm Warning | HGX | Waller | 56 min |
| Apr 16, 3:49 PM CDT | Tornado Warning | HGX | Brazoria, Fort Bend | 26 min |
| Apr 16, 4:00 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, Washington | 30 min |
| Apr 16, 4:42 PM CDT | Severe Thunderstorm Warning | HGX | Harris, Waller | 63 min |
| Apr 16, 5:15 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Fort Bend | 60 min |
| Apr 16, 6:57 PM CDT | Severe Thunderstorm Warning | HGX | Polk | 33 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.