Alert archive / Louisiana / Special Weather Statements in 2012

Special Weather Statement, NWS Lake Charles, LA

March 9, 2012Vernon Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Mar 9, 2012, 12:49 AM CST for Vernon Parish, Louisiana. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 9, 2012, 12:49 AM CST (06:49 UTC)
Expired: Mar 9, 2012, 1:30 AM CST
In force: 41 min
Issued by: NWS Lake Charles, LA

County Vernon Parish, LA

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 6.8 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.

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: 1786 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 629 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 201 m²/s²
0-3 km storm-relative helicity: 219 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 7.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lake Charles, LA wrote its last area forecast discussion before this special weather statement went out at Mar 8, 11:37 PM CST, 1 hour 12 minutes earlier.

Area forecast discussion, Mar 8, 11:37 PM CST, 1 hour 12 minutes before

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Hazardous weather outlook, Mar 8, 4:33 AM CST, 20 hours 16 minutes before

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In the hours before

Special weather statement, Mar 9, 12:49 AM CST, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1249 AM CST FRI MAR 9 2012

LAZ027-090730-
VERNON LA-
1249 AM CST FRI MAR 9 2012

...SIGNIFICANT WEATHER ADVISORY FOR VERNON PARISH UNTIL 130 AM CST...

AT 1245 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
CLUSTER OF STRONG THUNDERSTORMS 6 MILES SOUTHWEST OF NEW LLANO...
MOVING EAST AT 25 MPH.

* THE CLUSTER OF STRONG THUNDERSTORMS WILL BE NEAR...
  NEW LLANO AND LEESVILLE BY 1255 AM...
  FORT POLK BY 100 AM...
  SLAGLE BY 115 AM...
  CRAVENS BY 120 AM...
  LACAMP AND FULLERTON BY 130 AM...

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING AND WIND
GUSTS TO NEAR 45 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW AROUND
UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR BUILDING
UNTIL THESE STORMS HAVE PASSED.

THESE STORMS COULD PRODUCE RAINFALL AMOUNTS OF ONE TO TWO INCHES IN A
SHORT PERIOD OF TIME...RESULTING IN PONDING OF WATER AROUND LOW LYING
ROADWAYS. REMEMBER...DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED
ROADWAYS. THE DEPTH MAY BE TOO GREAT TO ALLOW A SAFE CROSSING.

LAT...LON 3127 9289 3094 9287 3092 9344 3113 9347

24

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 8, 7:34 PM CST	River Flood Warning	LCH	Calcasieu	24 days
Mar 8, 9:08 PM CST	Marine Dense Fog Advisory	LCH		9 hr
Mar 9, 6:18 AM CST	Special Marine Warning	LCH		57 min
Mar 9, 6:21 AM CST	Special Weather Statement	LCH	Cameron	24 min
Mar 9, 9:36 AM CST	River Flood Warning	LCH	Allen	8 days
Mar 9, 9:36 AM CST	River Flood Warning	LCH	Allen	21 days
Mar 9, 9:36 AM CST	River Flood Warning	LCH	Beauregard	4 days
Mar 9, 12:22 PM CST	Small Craft Advisory	LCH		39 hr

Nearby

Special Weather Statements in Louisiana, 2012 Every special weather statement in 2012

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.