Alert archive / Louisiana / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 23, NWS Shreveport, LA

January 21, 1999Ouachita Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Jan 21, 1999, 6:33 PM CST for Ouachita Parish, Louisiana. It was in force for 42 min. 2 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: Jan 21, 1999, 6:33 PM CST (00:33 UTC)
Expired: Jan 21, 1999, 7:15 PM CST
In force: 42 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County Ouachita Parish, LA

The radar

The Shreveport radar (KSHV), 158 km from the middle of the area, began a volume at 00:33 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
Jan 21, 6:35 PM CST	Hail 1.75	Fairbanks, LA
Jan 21, 6:40 PM CST	Thunderstorm Wind 52	Fairbanks, LA	Several trees down.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 21, 2:45 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 0.6 hours before the alert went out and 150 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: 959 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1162 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 204 m²/s²
0-3 km storm-relative helicity: 299 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 7.9

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 Jan 21, 1:20 PM CST, 5 hours 13 minutes earlier.

Area forecast discussion, Jan 21, 1:20 PM CST, 5 hours 13 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
120 AM CST THU JAN 21 1999

EXPECT TSTM INITIATION TO BEGIN LATE THIS AFTERNOON AND EVENING
AS JET STREAK APPROACHES AND SHORT WAVE TROF CONTINUES TO DEEPEN.
FEEL THAT CONVECTION WILL BECOME A RATHER NASTY LN OF SVR TSTMS
AND MOV RAPIDLY E INTO MS DURING LATE TONIGHT.

IN THE LONGER TERM...ETA IS THE MORE NRLY OF THE MODELS...HOWEVER...
IN ALL CASES...IT APPEARS THAT SRN FA SHOULD BE UNDER THE DRY SLOT OF
THE PROGGED COMMA HEAD WHILE FAR NRN FA WILL BE IN WRAP AROUND PCPN OF
COMMA HEAD BY FRIDAY NIGHT.  AS NVA AND CAA MOVE IN DURING SATURDAY...
EXPECT CLRG SKIES.  HAVE INCREASED POPS FOR TONIGHT AND EARLY FRIDAY
WITH DECREASED POPS FOR FRIDAY NIGHT WITH SUCH A POWERFUL SYSTEM.

SHV 56/61/40/57 6410  MLU 62/64/45/56 7510  08

In the hours before

Local storm report, Jan 21, 3:35 PM CST, 2 hours 58 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SHREVEPORT LA
335 PM CST THU JAN 21 1999

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0325 PM    QUEEN CITY                TX   1 INCH HAIL
01/21/99   CASS                           DIME TO NICKEL SIZE FROM
                                          PUBLIC REPORT RELAYED FROM
                                          SO AND VIA TV
                                          METEOROLOGIST.

Local storm report, Jan 21, 3:44 PM CST, 2 hours 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
344 PM CST THU JAN 21 1999

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0333 PM    FALCON                    AR   .75 INCH HAIL
01/21/99   NEVADA                         FROM HAM RADIO OPERATORS.

Local storm report, Jan 21, 4:16 PM CST, 2 hours 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
416 PM CST THU JAN 21 1999

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0230 PM    LAMARTINE                 AR   .5 INCH HAIL
01/21/99   COLUMBIA                       FROM SHERIFFS OFFICE.

0330 PM    WALDO                     AR
01/21/99   COLUMBIA                       FUNNEL CLOUD WITHIN 300
                                          FEET OF THE GROUND
                                          REPORTED FROM COUNTY OEM.

0335 PM    BEECH CREEK               AR
01/21/99   COLUMBIA                       FUNNEL CLOUD REPORTED FROM
                                          SHERIFFS OFFICE.

Local storm report, Jan 21, 4:51 PM CST, 1 hour 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
451 PM CST THU JAN 21 1999

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0435 PM    HOPE                      AR   .75 INCH HAIL
01/21/99   HEMPSTEAD                      FROM SHERIFFS OFFICE.

VIII.

Local storm report, Jan 21, 5:15 PM CST, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
515 PM CST THU JAN 21 1999

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0458 PM    HOPE                      AR   .75 INCH HAIL
01/21/99   HEMPSTEAD                      FROM COUNTY JUDGE.

0505 PM    HOPE                      AR   .75 INCH HAIL
01/21/99   HEMPSTEAD                      FROM HOPE PD.

Local storm report, Jan 21, 5:21 PM CST, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
521 PM CST THU JAN 21 1999

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0518 PM    EMMET                     AR   1.75 INCH HAIL
01/21/99   NEVADA                         REPORTED FROM HAM RADIO
                                          SPOTTERS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 9:38 PM CST	Severe Thunderstorm Warning	SHV	Franklin, Titus	32 min
Jan 21, 10:45 PM CST	Severe Thunderstorm Warning	SHV	Smith	65 min
Jan 21, 10:48 PM CST	Severe Thunderstorm Warning	SHV	Upshur	32 min
Jan 21, 10:52 PM CST	Severe Thunderstorm Warning	SHV	Gregg	63 min
Jan 21, 10:57 PM CST	Severe Thunderstorm Warning	SHV	Cherokee	63 min
Jan 21, 11:07 PM CST	Severe Thunderstorm Warning	SHV	Marion	63 min
Jan 21, 11:16 PM CST	Severe Thunderstorm Warning	SHV	Harrison, Rusk	59 min
Jan 21, 11:22 PM CST	Severe Thunderstorm Warning	SHV	Cass	63 min
Jan 21, 11:56 PM CST	Severe Thunderstorm Warning	SHV	Panola	59 min
Jan 22, 12:09 AM CST	Severe Thunderstorm Warning	SHV	Cherokee	31 min
Jan 22, 2:16 AM CST	Severe Thunderstorm Warning	SHV	Cherokee	49 min
Jan 22, 4:19 AM CST	Severe Thunderstorm Warning	SHV	Nacogdoches	61 min
Jan 22, 5:24 PM CST	Tornado Warning	SHV	Bowie	61 min
Jan 21, 8:40 PM CST	Tornado Warning	SHV	LaSalle	50 min
Jan 22, 12:01 AM CST	Severe Thunderstorm Warning	SHV	Caddo	64 min
Jan 22, 12:20 AM CST	Severe Thunderstorm Warning	SHV	Bossier	60 min
Jan 22, 12:38 AM CST	Severe Thunderstorm Warning	SHV	Webster	62 min
Jan 22, 1:38 AM CST	Tornado Warning	SHV	Union	47 min
Jan 22, 1:49 AM CST	Severe Thunderstorm Warning	SHV	Claiborne	46 min
Jan 22, 4:31 AM CST	Severe Thunderstorm Warning	SHV	Natchitoches	49 min
Jan 22, 4:37 AM CST	Severe Thunderstorm Warning	SHV	Sabine	48 min
Jan 22, 4:46 AM CST	Tornado Warning	SHV	Natchitoches	49 min
Jan 22, 5:01 AM CST	Tornado Warning	SHV	Red River	49 min
Jan 22, 5:10 AM CST	Severe Thunderstorm Warning	SHV	De Soto, Red River	50 min
Jan 22, 5:40 AM CST	Tornado Warning	SHV	Bienville	45 min
Jan 22, 5:44 AM CST	Tornado Warning	SHV	Jackson	46 min
Jan 22, 5:56 AM CST	Severe Thunderstorm Warning	SHV	Lincoln	49 min
Jan 22, 6:10 AM CST	Tornado Warning	SHV	Lincoln	35 min
Jan 22, 6:17 AM CST	Tornado Warning	SHV	Ouachita	48 min
Jan 22, 6:38 AM CST	Severe Thunderstorm Warning	SHV	Union	47 min
Jan 22, 7:22 AM CST	Flash Flood Warning	SHV	Bossier, Caddo, De Soto	4 hr
Jan 22, 7:22 AM CST	Flash Flood Warning	SHV	Webster	4 hr
Jan 22, 11:27 AM CST	Tornado Warning	SHV	Natchitoches	58 min
Jan 22, 11:51 AM CST	Tornado Warning	SHV	Grant	44 min
Jan 21, 8:05 PM CST	Severe Thunderstorm Warning	SHV	Hempstead	45 min
Jan 21, 8:27 PM CST	Tornado Warning	SHV	Hempstead	33 min
Jan 21, 11:59 PM CST	Severe Thunderstorm Warning	SHV	Miller	61 min
Jan 22, 12:34 AM CST	Severe Thunderstorm Warning	SHV	Columbia	61 min
Jan 22, 12:44 AM CST	Severe Thunderstorm Warning	SHV	Hempstead, Nevada	61 min
Jan 22, 2:04 AM CST	Tornado Warning	SHV	Union	46 min
Jan 22, 5:44 PM CST	Tornado Warning	SHV	Little River	61 min
Jan 22, 5:51 PM CST	Tornado Warning	SHV	Howard, Sevier	59 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1999 Every severe thunderstorm warning in 1999

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.