Alert archive / Texas / Flash Flood Warnings in 1997
Flash Flood Warning 50, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at May 25, 1997, 12:37 AM CDT for Harris County, Texas. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 25, 1997, 12:37 AM CDT (05:37 UTC)
- Expired
- May 25, 1997, 6:45 AM CDT
- In force
- 6 hr
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
County Harris County, TX
The radar
The Houston radar (KHGX), 52 km from the middle of the area, began a volume at 05:37 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, 5.6 hours before the alert went out and 213 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
- 1974 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 548 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KHOU 250536 FFWHOU TXC201-251145- BULLETIN - EBS ACTIVATION REQUESTED FLOOD WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 1237 AM CDT SUN MAY 25 1997 THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 645 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST TEXAS ...HARRIS COUNTY AT 1225 AM CDT...ALL SHOWER AND THUNDERSTORM ACTIVITY HAD CEASED OVERNIGHT FOR HARRIS COUNTY. HOWEVER...SEVERAL BAYOUS AND CREEKS REMAIN IN FLOOD EARLY THIS MORNING. IN PARTICULAR...HALLS BAYOU REMAINS BETWEEN 3 TO 4 FEET ABOVE BANK AT JENSEN ROAD. HALLS BAYOU HAS CRESTED AND WILL BEGIN TO SLOWLY RECEDE. GARNERS BAYOU AT BELTWAY 8 IS ALSO NEAR 3 FEET ABOVE BANK AND HAS CRESTED AND SHOULD ALSO BEGIN TO RECEDE. GREENS BAYOU BELOW ITS CONFLUENCE WITH HALLS BAYOU AT LEY ROAD WAS ALREADY WITHIN 1 FOOT OF BANKFULL AND WILL LIKELY CONTINUE TO RISE TO 2 TO 3 FEET ABOVE BANK OVER THE NEXT SEVERAL HOURS DUE TO THE AMOUNT OF WATER THAT WAS ENTERING GREENS FROM GARNERS AND HALLS BAYOU'S. BELOW LEY'S ROAD ON GREENS BAYOU AT NORMANDY...OR NEAR I-10...THE BAYOU WILL ALSO RISE TO OR JUST OVER BANKFULL LATER TONIGHT. THESE BAYOU'S WILL ALL BE CLOSE OR BACK WITHIN BANK BY 6 AM SUNDAY MORNING. PERSONS IN THE FLOOD PLAIN OF THESE BAYOU'S SHOULD BE ALERT AND KEEP AN EYE OUT FOR CHANGES IN WATER LEVELS. STAY TUNED TO NOAA WEATHER RADIO OR OTHER NEWS SOURCES FOR THE LATEST INFORMATION ON THIS DANGEROUS FLOOD SITUATION. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. &
What forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at May 24, 8:33 PM CDT, 4 hours 4 minutes earlier.
Area forecast discussion, May 24, 8:33 PM CDT, 4 hours 4 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 832 PM CDT SAT MAY 24 1997 TSTMS THAT FIRED UP ALONG THE SEABREEZE AND THE OLD OUTFLOW BNDRY WERE STILL AFFECTING THE CSTL COUNTIES AT THIS HR IN THE FA. AFOS GENERATED STABILITY INDICES INDICATED THAT THE AIR WAS STILL VERY UNSTABLE ALONG THE CST...WITH THE LI AT -10 AT CRP AND THE PW/S APRCHG 1.8 TO 2 INCHES. THE LINE OF STRMS HAS SLOWED DOWN AND CAN STILL XPC SOME TSTMS WITH HVY PRECIP THRU MIDNIGHT AT THE CST AND ENDING BEFORE OR BY MIDNIGHT ONE MORE TIER OF COUNTIES INLAND FM THE CST. THE STG S/W THAT HAS BEEN A MAJOR CONTRIBUTOR TO THESE TSTMS IS FCST TO MOV NE OF THE FA LATER TONIGHT. THIS CAN ALSO BE SEEN ON THE H7 LVL THAT SHOWS A TROF MOVG THRU SETX BY 12Z. THUS...CAN WORD THE UPDATE AS SHRAS OR TSTMS ENDING. WL STILL NEED TO KEEP IN THE HVY PCPN AND ISOL SVR. 40 UPDATED PRELIMS... CLL E/E-B B/B 67/90 69/93 6222 IAH T-E/E-B B/B 70/B90 73/92 6222 (+R/SVR WX ENDING THIS EVE SRN PTNS) GLS T-E/E-B B/B 74/84 75/86 2222 (+R/SVR WX ENDING BY MIDNIGHT)
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 9:35 PM CDT | Flash Flood Warning | HGX | Harris | 3 hr |
Nearby
Flash Flood Warnings in Texas, 1997Every flash flood warning in 1997
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.