Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 276, NWS Shreveport, LA

June 17, 1997Grant Parish, Natchitoches Parish, Winn Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Jun 17, 1997, 8:29 AM CDT for Grant Parish, Natchitoches Parish, Winn Parish, Louisiana. It was in force for 61 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: Jun 17, 1997, 8:29 AM CDT (13:29 UTC)
Expired: Jun 17, 1997, 9:30 AM CDT
In force: 61 min
Issued by: NWS Shreveport, LA
Area: Whole counties

Counties Grant Parish, LA, Natchitoches Parish, LA, Winn Parish, LA

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 17, 6:00 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.5 hours before the alert went out and 187 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: 3576 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 642 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 12.1

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 Jun 17, 1:50 AM CDT, 6 hours 39 minutes earlier.

Area forecast discussion, Jun 17, 1:50 AM CDT, 6 hours 39 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
150 AM CDT TUE JUN 17 1997

MODELS SIMILIAR IN MOVING UPPER LOW FROM WEST TX TO SOUTHERN MISSOURI
BY TONIGHT AS UPPER TROF DEVELOPS OVER EASTERN U.S. ON WED AND RIDGE
DEVELOPS OVER CENTRAL U.S. COLD FRONT CURRENTLY FROM NORTHWEST AR INTO
NORTH CENTRAL TEXAS WITH A COUPLE OF SQUALL LINES AHEAD OF IT WILL MOVE
SLOWLY EAST AND SOUTHEAST DURING THE PERIOD PROBABLY BECOMING STATIONARY
FROM NEAR AEX TO LFK BY 19/00Z...AND IF NGM IS CORRECT NOT THAT FAR.
WITH NORTHWEST FLOW SETTING UP ON WED. WILL LEAVE IN SOME POPS FOR
WED AS A WEAK SYSTEM IS MOVING SOUTH IN THE FLOW AND BOUNDARY WILL BE
HANGING AROUND AT LEAST OVER THE SOUTHERN SECTIONS. WILL NEED SEVERE IN
TODAY AS 50 KNOTS PROGGED AT 500MB ACROSS NORTHEAST TX INTO NORTHWEST
LA AS VORT MAX MOVES ACROSS...WITH CAPES OF 1000 TO 2000 J/KM AND LIS
OF -5 WHICH MAY BE UNDER DONE.

SHV 88/73/89  532   MLU  89/74/90  542

IV

In the hours before

Local storm report, Jun 17, 7:32 AM CDT, 57 minutes before

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Local storm report, Jun 17, 7:53 AM CDT, 36 minutes before

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Local storm report, Jun 17, 7:54 AM CDT, 35 minutes before

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Local storm report, Jun 17, 8:10 AM CDT, 19 minutes before

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Local storm report, Jun 17, 8:11 AM CDT, 18 minutes before

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Local storm report, Jun 17, 8:29 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 10:12 PM CDT	Severe Thunderstorm Warning	SHV	Angelina, Nacogdoches	48 min
Jun 16, 11:09 PM CDT	Severe Thunderstorm Warning	SHV	San Augustine	66 min
Jun 17, 12:57 AM CDT	Severe Thunderstorm Warning	SHV	Wood	48 min
Jun 17, 1:20 AM CDT	Severe Thunderstorm Warning	SHV	Franklin	25 min
Jun 17, 1:35 AM CDT	Severe Thunderstorm Warning	SHV	Camp, Titus	40 min
Jun 17, 1:58 AM CDT	Severe Thunderstorm Warning	SHV	Smith, Wood	62 min
Jun 17, 2:07 AM CDT	Severe Thunderstorm Warning	SHV	Morris	53 min
Jun 17, 2:23 AM CDT	Severe Thunderstorm Warning	SHV	Upshur	67 min
Jun 17, 2:35 AM CDT	Flash Flood Warning	SHV	Camp, Morris, Titus, Wood	4 hr
Jun 17, 2:52 AM CDT	Severe Thunderstorm Warning	SHV	Gregg	53 min
Jun 17, 2:57 AM CDT	Severe Thunderstorm Warning	SHV	Harrison, Marion	63 min
Jun 17, 3:18 AM CDT	Severe Thunderstorm Warning	SHV	Cass	42 min
Jun 17, 6:37 AM CDT	Severe Thunderstorm Warning	SHV	Angelina	68 min
Jun 17, 3:44 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	61 min
Jun 17, 5:11 AM CDT	Severe Thunderstorm Warning	SHV	Red River	49 min
Jun 17, 5:28 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Lincoln	62 min
Jun 17, 5:36 AM CDT	Severe Thunderstorm Warning	SHV	Natchitoches	69 min
Jun 17, 5:46 AM CDT	Severe Thunderstorm Warning	SHV	Jackson, Winn	59 min
Jun 17, 6:11 AM CDT	Severe Thunderstorm Warning	SHV	Ouachita	49 min
Jun 17, 6:27 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell	63 min
Jun 17, 2:40 AM CDT	Flash Flood Warning	SHV	Howard, Sevier	4 hr
Jun 17, 3:06 AM CDT	Severe Thunderstorm Warning	SHV	Howard, Little River, Sevier	54 min
Jun 17, 3:33 AM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Nevada	57 min
Jun 17, 3:41 AM CDT	Severe Thunderstorm Warning	SHV	Miller	49 min
Jun 17, 5:20 AM CDT	Severe Thunderstorm Warning	SHV	Union	40 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 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; the sounding from the Mesonet's radiosonde archive.