Alert archive / Texas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 177, NWS Shreveport, LA

May 2, 1997San Augustine County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 2, 1997, 9:42 PM CDT for San Augustine County, Texas. It was in force for 48 min. 1 report 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: May 2, 1997, 9:42 PM CDT (02:42 UTC)
Expired: May 2, 1997, 10:30 PM CDT
In force: 48 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County San Augustine County, TX

The radar

The Ft Polk radar (KPOE), 116 km from the middle of the area, began a volume at 02:45 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
May 2, 9:58 PM CDT	Hail 1.75	San Augustine, TX

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

Shreveport, LA (KSHV), launched 00:00Z, 2.7 hours before the alert went out and 127 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 4107 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 806 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 7.3

Open this sounding in Storm Lab

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 Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 2, 8:00 PM CDT, 1 hour 42 minutes earlier.

Area forecast discussion, May 2, 8:00 PM CDT, 1 hour 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
800 PM CDT FRI MAY 2 1997

UNSTABLE AIR HAS MOVED OVER THE EASTERN PART OF THE FOUR STATE AREA
THIS EVENING. THUNDERSTORMS HAVE DECREASED IN INTENSITY AND HAVE
BECOME MORE SCATTERED IN NATURE. THUS IT LOOKS AS IF THE FLASH FLOOD
WATCH FOR NORTHERN LOUISIANA CAN BE CANCELLED. THE COLD FRONT HAS MOVED
TO A LINE FROM LIT TO GGG TO AUS AND CONTINUES A SLOW SOUTHEAST TREK.
WILL LOWER POPS AT SHV TO 30 PERCENT TIL MIDNIGHT AND ZIP AFTER
MIDNIGHT. FOR MLU... 40 PERCENT FOR THE REMAINDER OF TONIGHT SHOULD
WORK OK. CLEARING EXPECTED AFTER THE FRONTAL PASSAGE FOR SATURDAY
AND SUNDAY.

3

In the hours before

Local storm report, May 2, 6:37 PM CDT, 3 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
635 PM CDT FRI MAY 2 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH LOCATION....

0330 PM    MINDEN                    LA   FLOODING
05/02/97   WEBSTER                        HIGHWAYS 7 AND 163 AND 164
                                          FLOODED SOUTH OF MINDEN

0405 PM    STERLINGTON               LA   NON QUALIFIED EVENT
05/02/97   UNION                          FUNNEL CLOUD JUST WEST OF
                                          STERLINGTON

0415 PM    HOMER                     LA   60 MPH TSTM GUST
05/02/97   CLAIBORNE                      TREES DOWN AT LAKE
                                          CLAIBORNE

0500 PM    DUBBERLY                  LA   NON QUALIFIED EVENT
05/02/97   WEBSTER                        5.00 INCHES OF RAIN AT
                                          DUBBERLY THROUGH 500 PM
   P                                       CDT

Local storm report, May 2, 6:41 PM CDT, 3 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
641 PM CDT FRI MAY 02 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH LOCATION....

0525 PM    2 S LUFKIN                TX   .75 INCH HAIL
05/02/97   ANGELINA

0529 PM    LUFKIN                    TX   .88 INCH HAIL
05/02/97   ANGELINA

0533 PM    LUFKIN                    TX   1 INCH HAIL
05/02/97   ANGELINA

0555 PM    PLEASANT HILL             LA   .5 INCH HAIL
05/02/97   SABINE

Local storm report, May 2, 6:43 PM CDT, 2 hours 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
641 PM CDT FRI MAY 02 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH LOCATION....

0525 PM    2 S LUFKIN                TX   .75 INCH HAIL
05/02/97   ANGELINA

0529 PM    LUFKIN                    TX   .88 INCH HAIL
05/02/97   ANGELINA

0533 PM    LUFKIN                    TX   1 INCH HAIL
05/02/97   ANGELINA

0555 PM    PL\EASANT HILL             LA   .5 INCH HAIL
05/02/97   SABINE

Local storm report, May 2, 6:47 PM CDT, 2 hours 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
647 PM CDT FRI MAY 02 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH LOCATION....

0615 PM    POWHATAN                  LA   1 INCH HAIL
05/02/97   NATCHITOCHES

0619 PM    EL DORADO                 AR   .88 INCH HAIL
05/02/97   UNION

Local storm report, May 2, 6:48 PM CDT, 2 hours 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
647 PM CDT FRI MAY 02 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH LOCATION....
p
0615 PM    POWHATAN                  LA   1 INCH HAIL
05/02/97   NATCHITOCHES

0619 PM    EL DORADO                 AR   .88 INCH HAIL
05/02/97   UNION

Local storm report, May 2, 9:31 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
931 PM CDT FRI MAY 02 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0915 PM    MINDEN                    LA   .75 INCH HAIL
05/02/97   WEBSTER

0919 PM    MINDEN                    LA   1 INCH HAIL
05/02/97   WEBSTER

0925 PM    STANLEY                   LA   1 INCH HAIL
05/02/97   DE SOTO

18

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 2, 8:06 PM CDT	Severe Thunderstorm Warning	SHV	Panola, Shelby	54 min
May 2, 9:03 PM CDT	Severe Thunderstorm Warning	SHV	Shelby	42 min
May 2, 10:07 PM CDT	Severe Thunderstorm Warning	SHV	Sabine	53 min
May 2, 7:12 PM CDT	Severe Thunderstorm Warning	SHV	Winn	33 min
May 2, 8:55 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Webster	50 min
May 2, 8:59 PM CDT	Severe Thunderstorm Warning	SHV	De Soto	61 min
May 2, 9:24 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Claiborne	51 min
May 2, 9:55 PM CDT	Severe Thunderstorm Warning	SHV	Lincoln	50 min
May 2, 10:47 PM CDT	Severe Thunderstorm Warning	SHV	Ouachita	43 min

Nearby

Severe Thunderstorm Warnings in Texas, 1997 Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.