Alert archive / Louisiana / Tornado Warnings in 2009

Tornado Warning 40, NWS New Orleans, LA

May 4, 20094 parishes in Louisiana

NWS New Orleans, LA issued this tornado warning at May 4, 2009, 7:55 AM CDT for 4 parishes in Louisiana. It was in force for 35 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: May 4, 2009, 7:55 AM CDT (12:55 UTC)
Expired: May 4, 2009, 8:30 AM CDT
In force: 35 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

Counties Ascension Parish, LA, Assumption Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
May 4, 7:33 AM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 0.9 hours before the alert went out and 109 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: 2102 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 577 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 170 m²/s²
0-3 km storm-relative helicity: 242 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 9.9

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KLIX 041255
TORLIX
LAC005-007-093-095-041330-
/O.NEW.KLIX.TO.W.0040.090504T1255Z-090504T1330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
755 AM CDT MON MAY 4 2009

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN ASCENSION PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITY OF DONALDSONVILLE...
  NORTHEASTERN ASSUMPTION PARISH IN SOUTHEAST LOUISIANA...
  ST. JAMES PARISH IN SOUTHEAST LOUISIANA...
  WEST CENTRAL ST. JOHN THE BAPTIST PARISH IN SOUTHEAST LOUISIANA...

* UNTIL 830 AM CDT

* AT 753 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  DONALDSONVILLE...MOVING EAST AT 25 MPH.

* THE TORNADO WILL BE NEAR...
  CONVENT BY 815 AM CDT...
  LUTCHER AND 6 MILES SOUTHWEST OF GRAMERCY BY 830 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
PENNY TO NICKEL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM
WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 PM CDT MONDAY AFTERNOON
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 3015 9060 2992 9068 2998 9111 3015 9106
TIME...MOT...LOC 1254Z 285DEG 21KT 3004 9098

$$


24/RR

1 follow-up statement

000 
WWUS54 KLIX 041310
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
810 AM CDT MON MAY 4 2009

LAC005-041320-
/O.CAN.KLIX.TO.W.0040.000000T0000Z-090504T1330Z/
ASCENSION LA-
810 AM CDT MON MAY 4 2009

...THE TORNADO WARNING FOR SOUTHERN ASCENSION PARISH IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 PM CDT MONDAY AFTERNOON
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

LAT...LON 3008 9095 3009 9092 3012 9092 3006 9063
      3004 9063 2992 9068 2992 9070 2996 9099
TIME...MOT...LOC 1310Z 286DEG 25KT 3001 9087

$$

LAC007-093-095-041330-
/O.CON.KLIX.TO.W.0040.000000T0000Z-090504T1330Z/
ST. JOHN THE BAPTIST LA-ASSUMPTION LA-ST. JAMES LA-
810 AM CDT MON MAY 4 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 AM CDT FOR ST.
JAMES...NORTHEASTERN ASSUMPTION AND WEST CENTRAL ST. JOHN THE BAPTIST
PARISHES...

AT 810 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR CONVENT...OR 10
MILES SOUTHEAST OF DONALDSONVILLE...MOVING EAST AT 30 MPH.

THE TORNADO WILL BE NEAR...
  CONVENT BY 815 AM CDT...
  6 MILES SOUTH OF LUTCHER BY 825 AM CDT...
  6 MILES SOUTH OF GRAMERCY BY 830 AM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 PM CDT MONDAY AFTERNOON
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 3008 9095 3009 9092 3012 9092 3006 9063
      3004 9063 2992 9068 2992 9070 2996 9099
TIME...MOT...LOC 1310Z 286DEG 25KT 3001 9087

$$


24/RR

What forecasters said that day

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

NWS New Orleans, LA wrote its last area forecast discussion before this tornado warning went out at May 4, 7:52 AM CDT, 3 minutes earlier.

Area forecast discussion, May 4, 7:52 AM CDT, 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
752 AM CDT MON MAY 4 2009

.UPDATE...
...TORNADO WATCH 238 IN EFFECT UNTIL 2 PM CDT...

ZONES UPDATED ACCORDINGLY. SEVERAL STRONG ROTATIONAL COUPLETS
NOTED ON RADAR AND WARNINGS APPEAR WARRANTED.

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...NONE.
GM...SMALL CRAFT ADVISORY UNTIL 10 AM CDT THIS MORNING FOR GMZ555-575.

MS...NONE.
GM...SMALL CRAFT ADVISORY UNTIL 10 AM CDT THIS MORNING FOR GMZ575.

&&

24/RR

Hazardous weather outlook, May 4, 5:10 AM CDT, 2 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
510 AM CDT MON MAY 4 2009

GMZ530-550-555-570-575-LAZ034>040-046>050-056>070-MSZ068>071-077-
080>082-041700-
LAKE PONTCHARTRAIN AND LAKE MAUREPAS-
COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER
TO LOWER ATCHAFALAYA RIVER LA OUT 20 NM-
COASTAL WATERS FROM PASCAGOULA MS TO THE SOUTHWEST PASS OF THE
MISSISSIPPI RIVER OUT 20 NM-
COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER
TO LOWER ATCHAFALAYA RIVER LA FROM 20 TO 60 NM-
COASTAL WATERS FROM PASCAGOULA MS TO THE SOUTHWEST PASS OF THE
MISSISSIPPI RIVER FROM 20 TO 60 NM-POINTE COUPEE-WEST FELICIANA-
EAST FELICIANA-ST. HELENA-TANGIPAHOA-WASHINGTON-ST. TAMMANY-
IBERVILLE-WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION-LIVINGSTON-
ASSUMPTION-ST. JAMES-ST. JOHN THE BAPTIST-UPPER LAFOURCHE-
ST. CHARLES-UPPER JEFFERSON-ORLEANS-UPPER PLAQUEMINES-
UPPER ST. BERNARD-UPPER TERREBONNE-LOWER TERREBONNE-
LOWER LAFOURCHE-LOWER JEFFERSON-LOWER PLAQUEMINES-
LOWER ST. BERNARD-WILKINSON-AMITE-PIKE-WALTHALL-PEARL RIVER-
HANCOCK-HARRISON-JACKSON-
510 AM CDT MON MAY 4 2009

...HEAVY RAINFALL AND POSSIBLE FLOODING THIS MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF COASTAL WATERS
OF SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI...SOUTHEAST
LOUISIANA AND SOUTHERN MISSISSIPPI.

.DAY ONE...TODAY AND TONIGHT

AN URBAN AND SMALL STREAM FLOOD ADVISORY IS IN EFFECT UNTIL 815 AM
CDT FOR PORTIONS OF EAST-CENTRAL LOUISIANA AND SOUTHERN
MISSISSIPPI FOR THE POTENTIAL FLOODING OF STREETS AND LOW LYING
AREAS. MOTORISTS ARE URGED TO EXERCISE CAUTION DURING THE MORNING
COMMUTE IN THE ADVISORY AREA.

THUNDERSTORMS ALONG A COLD FRONT AND MOVING SLOWLY EASTWARD WILL
BECOME STRONG TO MARGINALLY SEVERE THIS MORNING. THE PRIMARY
THREAT WILL BE HIGH WINDS WITH SOME DAMAGING WINDS POSSIBLE. SOME
SMALL HAIL...FREQUENT LIGHTNING AND VERY HEAVY RAINFALL WILL ALSO
ACCOMPANY THESE STORMS AS THEY MOVE TO THE EAST AT 15 MPH. AN
ISOLATED TORNADO CAN NOT BE RULED OUT. THE THREAT SHOULD DIMINISH
BY EARLY THIS AFTERNOON AS THE FRONT MOVES EAST OF THE AREA.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ISOLATED NON-SEVERE THUNDERSTORMS ARE POSSIBLE EACH AFTERNOON
THROUGH SATURDAY.

MINOR RIVER FLOODING WILL CONTINUE ALONG THE ATCHAFALAYA RIVER
NEAR MORGAN CITY UNTIL FURTHER NOTICE.

.SPOTTER INFORMATION STATEMENT...
ACTIVATION OF STORM SPOTTERS WILL NOT BE NEEDED AT THIS TIME.
HOWEVER...EMERGENCY MANAGEMENT AND FIRST RESPONDERS SHOULD CLOSELY
MONITOR THE WEATHER SITUATION AND BE PREPARED FOR POTENTIAL FLOOD
IMPACTS IN URBAN AREAS THIS MORNING...PARTICULARLY ACROSS SOUTH
MISSISSIPPI ALONG U.S. HIGHWAY 98 AND IN THE GREATER BATON ROUGE
AREA. PLEASE RELAY ANY REPORTS OF FLOODING OR STORM DAMAGE TO THE
NATIONAL WEATHER SERVICE OFFICE IN SLIDELL.

24/RR

In the hours before

Special weather statement, May 4, 3:46 AM CDT, 4 hours 9 minutes before

MSZ069>071-040945-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
346 AM CDT MON MAY 4 2009

...STRONG THUNDERSTORM MOVING EAST AFFECTING PIKE COUNTY...WALTHALL
COUNTY...AMITE COUNTY...

AT 345 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 7 MILES SOUTHWEST OF MCCOMB...OR ABOUT 4 MILES
WEST OF MCCOMB AIRPORT...MOVING EAST AT 30 MPH.

THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...MCCOMB
AIRPORT...MAGNOLIA...MCCOMB...SUMMIT...TYLERTOWN AND SALEM

THE PRIMARY THREATS FROM THIS STORM ARE FREQUENT LIGHTNING AND PEA TO
MARBLE SIZE HAIL. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL THIS
STORM HAS PASSED.

Special weather statement, May 4, 4:41 AM CDT, 3 hours 14 minutes before

LAZ036>039-MSZ069>071-077-041045-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
441 AM CDT MON MAY 4 2009

...LINE OF STRONG THUNDERSTORMS MOVING EAST AFFECTING WASHINGTON
PARISH...EAST FELICIANA PARISH...TANGIPAHOA PARISH...ST. HELENA
PARISH...PIKE COUNTY...WALTHALL COUNTY...PEARL RIVER COUNTY...AMITE
COUNTY...

AT 439 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS FROM 21 MILES EAST OF MCCOMB TO
GREENSBURG...MOVING EAST AT 30 MPH.

THE LINE OF STRONG THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND...
KENTWOOD...TYLERTOWN...TANGIPAHOA...MOUNT HERMAN...DEXTER...WILMER...
FRANKLINTON...VARNADO...ENON...BOGALUSA...ANGIE AND CROSSROADS

THE PRIMARY THREATS FROM THESE STORMS ARE FREQUENT LIGHTNING...PEA TO
MARBLE SIZE HAIL...AND WIND GUSTS TO NEAR 40 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.

Special weather statement, May 4, 5:54 AM CDT, 2 hours 1 minute before

LAZ038-039-041200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
554 AM CDT MON MAY 4 2009

...STRONG THUNDERSTORM MOVING EAST AFFECTING WASHINGTON PARISH...
TANGIPAHOA PARISH...

AT 553 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 9 MILES NORTH OF AMITE...OR ABOUT 4 MILES
SOUTHEAST OF TANGIPAHOA...MOVING EAST AT 20 MPH.

THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...WILMER...
MOUNT HERMAN AND FRANKLINTON

THE PRIMARY THREATS FROM THIS STORM ARE PEA TO MARBLE SIZE HAIL AND
WIND GUSTS TO NEAR 40 MPH...WHICH COULD DOWN TREE LIMBS AND BLOW
AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE HOME OR
BUILDING UNTIL THIS STORM HAS PASSED.

FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.

Local storm report, May 4, 6:57 AM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
657 AM CDT MON MAY 04 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0655 AM     TSTM WND DMG     2 W FRANKLINTON         30.85N 90.18W
05/04/2009                   WASHINGTON         LA   LAW ENFORCEMENT

            ROOF BLOWN OFF SHED AND TREES DOWN ACROSS SYLVEST ROAD.

&&

24/RR

Local storm report, May 4, 7:40 AM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
740 AM CDT MON MAY 04 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0635 AM     TSTM WND DMG     10 N POPLARVILLE        30.98N 89.53W
05/04/2009                   PEARL RIVER        MS   AIRPLANE PILOT

            TREES AND POWERLINES DOWNED NEAR THE INTERSECTION OF
            WAYNE PARDUE AND SPRING HILL ROADS. A MOBILE HOME WAS
            ALSO DAMAGED.

&&

MEFFERSO

Local storm report, May 4, 7:42 AM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE NEW ORLEANS LA
742 AM CDT MON MAY 04 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0635 AM     TSTM WND DMG     10 N POPLARVILLE        30.98N 89.53W
05/04/2009                   PEARL RIVER        MS   LAW ENFORCEMENT

            TREES AND POWERLINES DOWNED NEAR THE INTERSECTION OF
            WAYNE PARDUE AND SPRING HILL ROADS. A MOBILE HOME WAS
            ALSO DAMAGED.

&&

MEFFERSO

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 11:14 PM CDT	Small Craft Advisory	LIX		11 hr
May 4, 5:43 AM CDT	Severe Thunderstorm Warning	LIX	Washington	32 min
May 4, 5:46 AM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Saint Charles, Saint Helena, Saint John the Baptist, Tangipahoa and 1 more	73 days
May 4, 6:08 AM CDT	Tornado Warning	LIX	Tangipahoa, Washington	37 min
May 4, 6:14 AM CDT	Areal Flood Advisory	LIX	Ascension, East Baton Rouge, Iberville, Livingston, Saint Tammany, West Baton Rouge	76 days
May 4, 6:37 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, Assumption, East Baton Rouge, Iberville, Livingston, Saint James and 1 more	53 min
May 4, 6:43 AM CDT	Tornado Warning	LIX	Washington	32 min
May 4, 7:14 AM CDT	Tornado Warning	LIX	Ascension, Assumption, Iberville, Saint James	46 min
May 4, 7:44 AM CDT	Tornado Warning	LIX	Livingston, Tangipahoa	31 min
May 4, 7:50 AM CDT	Severe Thunderstorm Warning	LIX	Washington	55 min
May 4, 8:27 AM CDT	Tornado Warning	LIX	Lafourche, Saint James, Saint John the Baptist	33 min
May 4, 8:45 AM CDT	Areal Flood Advisory	LIX	East Baton Rouge, Livingston, Washington, West Baton Rouge	83 days
May 4, 8:52 AM CDT	Tornado Warning	LIX	Lafourche, Saint Charles, Saint James, Saint John the Baptist	38 min
May 4, 9:00 AM CDT	Areal Flood Advisory	LIX	Assumption, Saint Charles, Saint James, Saint John the Baptist	83 days
May 4, 10:10 AM CDT	Severe Thunderstorm Warning	LIX	Assumption	22 min
May 4, 10:17 AM CDT	Flash Flood Watch	LIX	Assumption, Saint Bernard, Saint James, Saint John the Baptist	4 hr
May 4, 10:43 AM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche, Plaquemines	47 min
May 4, 11:03 AM CDT	Areal Flood Advisory	LIX	Assumption, Lafourche, Saint Tammany, Terrebonne	84 days
May 4, 11:17 AM CDT	Special Marine Warning	LIX		88 min
May 4, 12:44 PM CDT	Special Marine Warning	LIX		91 min
May 4, 3:17 PM CDT	River Flood Warning	LIX	East Baton Rouge, Pointe Coupee, West Feliciana	44 days

Nearby

Tornado Warnings in Louisiana, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.