Alert archive / Texas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 120, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Aug 30, 2001, 5:07 AM CDT for Chambers County, Galveston County, Texas. It was in force for 53 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
- Aug 30, 2001, 5:07 AM CDT (10:07 UTC)
- Expired
- Aug 30, 2001, 6:00 AM CDT
- In force
- 53 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Chambers County, TX, Galveston County, TX
The radar
The Houston radar (KHGX), 33 km from the middle of the area, began a volume at 10:09 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 00:00Z, 10.1 hours before the alert went out and 164 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
- 909 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 606 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Aug 30, 2:42 AM CDT, 2 hours 25 minutes earlier.
Area forecast discussion, Aug 30, 2:42 AM CDT, 2 hours 25 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 240 AM CDT THU AUG 29 2001 MORE RAIN ON TAP FOR SE TX. REASONING REMAINS THE SAME AS THE PAST SEVERAL DAYS. FOR THOSE THAT HAVENT BEEN KEEPING UP, JUNKERS DISCUSSIONS (QPFERD & QPFPFD) SUM THINGS UP NICELY. GOOD PRECIP COVERAGE SHOWING UP ON THE 88D WITH A LARGE SURGE GETTING READY TO MOVE ONSHORE. SAT PIX ONCE AGAIN SHOWS SIGNIFICANT MOISTURE ALL THE WAY DOWN TO TAMPICO. MODELS SEEM TO HAVE A GOOD HANDLE OF THE SITUATION. WAS CONCERNED LAST NIGHT ABOUT PRECIP COVERAGE ETA/AVN WERE PAINTING DURING THE OVERNIGHT HOURS (RIGHT NOW) SINCE PRIOR TO NOW, IT WAS MORE DIURNAL IN NATURE. HOWEVER, BOTH VERIFIED NICELY AND WILL AGAIN ACCEPT THEIR SOLN FOR ANOTHER ROUND DURING THE OVERNIGHT HOURS TONIGHT. WITHOUT A LLVL BOUNDARY TO FOCUS ON, A PERSISTENT LIGHT TO MODERATE RAIN HAS BEEN THE RULE WHICH HASNT POSED MUCH OF A SIGNIFICANT FLASH FLOOD THREAT AS OF YET. BUT GROUND IS FAIRLY SATURATED AND ANY PERSISTENT HEAVY RAIN OVER ANY GIVEN LOCATION COULD LEAD TO SOME PROBLEMS. LOOKING AT THE 3 DAY STORM TOTAL PRECIP OFF THE 88D... REALLY CONCERNED WITH THE SWRN COASTAL COUNTIES (FOR OBVIOUS REASONS) AND THE NORTHERN TIER OF COUNTIES (CLOSER TO THE RRQ OF JET). AS FAR AS THE FFA...WILL REISSUE ANOTHER ONE FOR TODAY AND LET THE DAY CREW MAKE A DECISION ON WHAT TO DO WITH IT AFTER THAT. EXTENDED: THE TROF DOES LOOK TO MAKE SOME SLOW EWD MOVEMENT INTO THE WEEKEND POSSIBLY SHIFTING THE HEAVY RAIN THREAT A LITTLE FURTHER EAST. NW PORTIONS MAY (EMPHASIS ON MAY) SEE A LITTLE DRIER WX THIS WEEKEND, BUT REST OF THE AREA LOOKS TO REMAIN UNDER THE GUN. FRONTAL BOUNDARY PULLS UP STATIONARY ACROSS NRN PORTIONS LATE SATURDAY AND PERSISTS FOR SOME TIME AND WITH MOISTURE STILL HANGING AROUND...YOU KNOW THE STORY. MARINE: NO FLAGS ATTM BUT BOATING NOT RECOMMENDED. NUMEROUS TSTMS WILL PRODUCE OCCASIONAL GUSTS >30KT AND HIGH SEAS. 47/43 .HGX...FFA ALL CWA. PRELIMS... CLL TT 082/073 084/073 089 +68 IAH TT 080/073 083/074 086 +89 GLS TT 081/077 083/078 086 ++9
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 5:57 AM CDT | Tornado Warning | HGX | Galveston | 48 min |
| Aug 30, 6:29 PM CDT | Tornado Warning | HGX | Brazoria, Galveston, Harris | 46 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.