Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 100, NWS Norman, OK

April 11, 2016Carter County, Johnston County, Marshall County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 11, 2016, 12:50 PM CDT for Carter County, Johnston County, Marshall County, Oklahoma. It was in force for 40 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: Apr 11, 2016, 12:50 PM CDT (17:50 UTC)
Expired: Apr 11, 2016, 1:30 PM CDT
In force: 40 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Carter County, OK, Johnston County, OK, Marshall County, OK

The radar

The Norman radar (KTLX), 131 km from the middle of the area, began a volume at 17:51 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.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 5.8 hours before the alert went out and 122 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1537 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 11, 12:14 PM CDT, 36 minutes earlier.

Area forecast discussion, Apr 11, 12:14 PM CDT, 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
1214 PM CDT MON APR 11 2016

.DISCUSSION...
PLEASE SEE THE 18Z AVIATION DISCUSSION BELOW.

&&

.AVIATION...
MVFR CIGS WILL CONTINUE THROUGHOUT THE DAY, ALONG WITH SHOWER AND
THUNDERSTORM CHANCES. CHANCES OVER THE TERMINALS SHOULD END AROUND
00Z, BUT THE MVFR CIGS MAY LINGER THROUGH 06Z OR SO. NORTHEAST
WINDS AROUND 15 TO 20 KT ARE EXPECTED UNTIL AT LEAST SUNSET.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  42  64  47  70 /  10   0  10   0
HOBART OK         40  64  46  72 /  10   0  20  10
WICHITA FALLS TX  45  66  49  72 /  10  10  20  20
GAGE OK           36  64  42  75 /  10   0  10   0
PONCA CITY OK     36  64  41  72 /  10   0  10   0
DURANT OK         50  67  50  69 /  30   0  20  20

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
TX...NONE.
&&

25/03/03

Hazardous weather outlook, Apr 11, 11:51 AM CDT, 59 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1151 AM CDT MON APR 11 2016

OKZ004>048-050>052-TXZ083>090-121700-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-
NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-
BECKHAM-WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-
CLEVELAND-POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-
TILLMAN-COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-
JEFFERSON-CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-
FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1151 AM CDT MON APR 11 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN...
WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH
TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

.THUNDERSTORMS...
THERE IS A RISK OF SEVERE STORMS THIS AFTERNOON INTO THIS EVENING
ACROSS PORTIONS OF SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS.

LOCATION...
A SLIGHT RISK OF SEVERE STORMS IS LOCATED SOUTH AND EAST OF A
LINE FROM ADA AND NORTHWEST OF ARDMORE... TO WAURIKA OKLAHOMA AND
HENRIETTA TEXAS. THIS INCLUDES ARDMORE... ATOKA... AND DURANT. A
MARGINAL RISK COVERS AN AREA GENERALLY SOUTH AND EAST OF A LINE
FROM HOLDENVILLE AND CHICKASHA... TO HOBART OKLAHOMA... TO NEAR
VERNON AND SEYMOUR TEXAS.

TIMING...
SEVERE STORMS WILL BE POSSIBLE THROUGH 8 PM.

IMPACTS...
LARGE HAIL UP TO THE SIZE OF GOLF BALLS AND DAMAGING WIND GUSTS
UP TO 70 MPH WILL BE POSSIBLE WITH THE STRONGEST STORMS. THERE IS
ALSO A LOW RISK OF TORNADOES... MAINLY FOR AREAS ALONG AND SOUTH
OF THE RED RIVER.

DISCUSSION...
SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP AND MOVE
ACROSS PARTS OF THE AREA THROUGHOUT THE DAY... GENERALLY IN AREAS
SOUTH OF INTERSTATE 40. THERE ARE STILL SOME QUESTIONS ON WHETHER
THE INGREDIENTS WILL BE ABLE TO COME TOGETHER TODAY FOR SOME
STRONG TO SEVERE STORMS TO DEVELOP. HOWEVER... IF SEVERE STORMS DO
DEVELOP... LARGE HAIL AND STRONG WIND GUSTS WILL BE THE PRIMARY
CONCERNS. THERE IS ALSO A LOW RISK FOR A TORNADO OR TWO.

THE POTENTIAL FOR SEVERE STORMS IS EXPECTED TO END EARLY THIS
EVENING.

.SPOTTER AND EMERGENCY MANAGEMENT INFORMATION STATEMENT...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREAS SHOULD PLAN FOR SEVERE WEATHER OPERATIONS THIS
AFTERNOON AND EVENING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

.THUNDERSTORMS...
THUNDERSTORMS WILL BE POSSIBLE AGAIN TUESDAY NIGHT INTO
WEDNESDAY... SEVERE STORMS ARE NOT ANTICIPATED AT THIS TIME.
THUNDERSTORM CHANCES WILL THEN RETURN TO THE AREA FRIDAY AND
CONTINUE INTO THE WEEKEND. SOME STRONG TO SEVERE STORMS COULD BE
POSSIBLE.

.FIRE WEATHER...
NEAR CRITICAL FIRE WEATHER CONDITIONS WILL DEVELOP ON FRIDAY DUE
TO GUSTY SOUTH WINDS.

GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW
OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.

KURTZ/MAXWELL/BARNES

In the hours before

Special weather statement, Apr 11, 7:08 AM CDT, 5 hours 42 minutes before

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Special weather statement, Apr 11, 7:27 AM CDT, 5 hours 23 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
727 AM CDT MON APR 11 2016

OKZ043-047-048-051-052-111315-
ATOKA OK-COAL OK-BRYAN OK-MARSHALL OK-JOHNSTON OK-
727 AM CDT MON APR 11 2016

...SIGNIFICANT WEATHER ADVISORY FOR ATOKA...SOUTHERN COAL...BRYAN...
MARSHALL AND JOHNSTON COUNTIES UNTIL 815 AM CDT...

AT 725 AM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING FROM
3 MILES EAST OF COLEMAN TO 3 MILES NORTHWEST OF LITTLE CITY TO NEAR
KINGSTON...MOVING NORTHEAST AT 45 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 40 MPH...
FREQUENT CLOUD TO GROUND LIGHTNING...

LOCATIONS IMPACTED INCLUDE...
DURANT...MADILL...ATOKA...TISHOMINGO...COALGATE...KINGSTON...COLBERT...
CADDO...BOKCHITO...RAVIA...ACHILLE...WAPANUCKA...STRINGTOWN...LEHIGH...
BENNINGTON...SILO...MILBURN...TUSHKA...CANEY AND KENEFIC.

LAT...LON 3451 9578 3416 9578 3416 9598 3394 9594
      3385 9576 3389 9593 3384 9614 3369 9636
      3385 9663 3390 9659 3392 9667 3382 9675
      3387 9689 3415 9684 3449 9666 3464 9588
      3459 9567 3451 9567
TIME...MOT...LOC 1225Z 247DEG 40KT 3429 9636 3412 9666 3399 9672

KURTZ

Special weather statement, Apr 11, 7:30 AM CDT, 5 hours 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
730 AM CDT MON APR 11 2016

OKZ045-046-050-111300-
CARTER OK-LOVE OK-JEFFERSON OK-
730 AM CDT MON APR 11 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CARTER...
NORTHWESTERN LOVE AND EASTERN JEFFERSON COUNTIES UNTIL 800 AM CDT...

AT 728 AM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING FROM
7 MILES NORTHWEST OF OSCAR TO 3 MILES EAST OF TERRAL...MOVING
NORTHEAST AT 45 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 40 MPH...
FREQUENT CLOUD TO GROUND LIGHTNING...

LOCATIONS IMPACTED INCLUDE...
HEALDTON...WILSON...RINGLING...RUBOTTOM...OSCAR...GRADY...CORNISH...
PETERSBURG AND COURTNEY.

LAT...LON 3388 9793 3417 9787 3428 9740 3413 9731
      3389 9745 3392 9749 3390 9755 3390 9759
      3392 9760 3395 9759 3399 9767 3394 9773
      3393 9776 3392 9776 3392 9778 3389 9778
      3390 9780 3386 9783 3385 9787
TIME...MOT...LOC 1228Z 242DEG 40KT 3407 9783 3390 9787

KURTZ

Special weather statement, Apr 11, 12:07 PM CDT, 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1207 PM CDT MON APR 11 2016

OKZ045-046-050-111745-
CARTER OK-LOVE OK-JEFFERSON OK-
1207 PM CDT MON APR 11 2016

...SIGNIFICANT WEATHER ADVISORY FOR CARTER...LOVE AND NORTHEASTERN
JEFFERSON COUNTIES UNTIL 1245 PM CDT...

AT 1206 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES NORTH OF
RUBOTTOM...MOVING NORTHEAST AT 40 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 40 MPH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3392 9749 3391 9753 3419 9787 3429 9760
      3429 9756 3430 9756 3438 9736 3432 9695
      3395 9698 3395 9700 3390 9699 3390 9718
      3392 9721 3391 9724 3390 9725 3389 9745
TIME...MOT...LOC 1706Z 237DEG 33KT 3402 9744

Special weather statement, Apr 11, 12:37 PM CDT, 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1237 PM CDT MON APR 11 2016

OKZ041-046-047-111815-
CARTER OK-MURRAY OK-JOHNSTON OK-
1237 PM CDT MON APR 11 2016

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CARTER...MURRAY AND
JOHNSTON COUNTIES UNTIL 115 PM CDT...

AT 1236 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER RAVIA...
MOVING NORTHEAST AT 55 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3428 9641 3417 9690 3417 9697 3415 9697
      3407 9713 3407 9719 3432 9752 3450 9722
      3454 9703 3448 9656
TIME...MOT...LOC 1736Z 240DEG 49KT 3424 9677

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 10, 7:12 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	48 min
Apr 10, 7:17 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major	43 min
Apr 10, 7:20 PM CDT	Special Weather Statement	OUN	Kiowa	55 min
Apr 10, 7:28 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	47 min
Apr 10, 7:32 PM CDT	Special Weather Statement	OUN	Canadian	28 min
Apr 10, 7:41 PM CDT	Special Weather Statement	OUN	Garfield	34 min
Apr 10, 7:50 PM CDT	Special Weather Statement	OUN	Caddo, Canadian	25 min
Apr 10, 7:51 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant	39 min
Apr 10, 7:54 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton	51 min
Apr 10, 7:55 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Major	50 min
Apr 10, 7:57 PM CDT	Special Weather Statement	OUN	Greer	48 min
Apr 10, 7:59 PM CDT	Special Weather Statement	OUN	Jackson, Kiowa	46 min
Apr 10, 8:03 PM CDT	Special Weather Statement	OUN	Washita	42 min
Apr 10, 8:06 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	18 min
Apr 10, 8:16 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Kiowa, Washita	44 min
Apr 10, 8:19 PM CDT	Special Weather Statement	OUN	Canadian	26 min
Apr 10, 8:26 PM CDT	Special Weather Statement	OUN	Kingfisher, Logan, Payne	34 min
Apr 10, 8:31 PM CDT	Special Weather Statement	OUN	Caddo	59 min
Apr 10, 8:31 PM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	44 min
Apr 10, 8:33 PM CDT	Special Weather Statement	OUN	Beckham	42 min
Apr 10, 8:35 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	40 min
Apr 10, 8:45 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	45 min
Apr 10, 8:49 PM CDT	Special Weather Statement	OUN	Canadian	26 min
Apr 10, 8:51 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon	39 min
Apr 10, 9:07 PM CDT	Special Weather Statement	OUN	Caddo, Comanche	23 min
Apr 10, 9:09 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Kiowa, Washita	51 min
Apr 10, 9:16 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	44 min
Apr 10, 9:23 PM CDT	Special Weather Statement	OUN	Oklahoma	37 min
Apr 10, 9:24 PM CDT	Tornado Warning	OUN	Cotton	24 min
Apr 10, 9:35 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson, Kiowa, Tillman	40 min
Apr 10, 9:52 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	23 min
Apr 10, 10:00 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson	45 min
Apr 10, 10:01 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady	44 min
Apr 10, 10:15 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Jackson, Kiowa, Tillman, Washita	45 min
Apr 10, 10:21 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	24 min
Apr 10, 10:30 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	45 min
Apr 10, 10:32 PM CDT	Special Weather Statement	OUN	Logan	28 min
Apr 10, 10:36 PM CDT	Severe Thunderstorm Warning	OUN	Grady	39 min
Apr 10, 10:39 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	36 min
Apr 10, 10:40 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	35 min
Apr 10, 10:52 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Cotton, Grady, Kiowa, Stephens and 1 more	38 min
Apr 10, 11:01 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray, Stephens	27 min
Apr 10, 11:10 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Stephens	35 min
Apr 10, 11:21 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson, Stephens	39 min
Apr 10, 11:21 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Garvin, Grady, McClain, Stephens	39 min
Apr 10, 11:24 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Stephens	36 min
Apr 10, 11:31 PM CDT	Special Weather Statement	OUN	Cleveland, Oklahoma	29 min
Apr 10, 11:33 PM CDT	Special Weather Statement	OUN	Carter	27 min
Apr 10, 11:50 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Oklahoma	40 min
Apr 10, 11:59 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Cleveland, Garvin, Jefferson, Love, McClain and 5 more	46 min
Apr 11, 12:09 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Grady, McClain	25 min
Apr 11, 12:46 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Carter, Coal, Garvin, Hughes, Johnston and 6 more	44 min
Apr 11, 1:30 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal, Hughes, Johnston, Pontotoc	45 min
Apr 11, 3:46 AM CDT	Special Weather Statement	OUN	Murray	29 min
Apr 11, 5:48 AM CDT	Special Weather Statement	OUN	Carter	27 min
Apr 11, 5:57 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson, Murray	48 min
Apr 11, 6:28 AM CDT	Special Weather Statement	OUN	Jefferson	32 min
Apr 11, 7:08 AM CDT	Special Weather Statement	OUN	Murray	37 min
Apr 11, 7:27 AM CDT	Special Weather Statement	OUN	Atoka, Bryan, Johnston, Marshall	48 min
Apr 11, 7:30 AM CDT	Special Weather Statement	OUN	Jefferson	30 min
Apr 11, 12:07 PM CDT	Special Weather Statement	OUN	Carter, Love	38 min
Apr 11, 12:17 PM CDT	Areal Flood Advisory	OUN	Carter, Jefferson, Love	118 min
Apr 11, 12:37 PM CDT	Special Weather Statement	OUN	Carter, Johnston, Murray	38 min
Apr 11, 1:22 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Love, Marshall	38 min
Apr 11, 1:28 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Coal, Johnston, Marshall	32 min
Apr 11, 1:45 PM CDT	Areal Flood Advisory	OUN	Atoka, Bryan, Carter, Johnston, Love, Marshall	2 hr
Apr 11, 1:58 PM CDT	Special Weather Statement	OUN	Caddo	47 min
Apr 11, 1:58 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Coal	47 min
Apr 11, 2:06 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Johnston, Marshall	39 min
Apr 11, 2:40 PM CDT	Severe Thunderstorm Warning	OUN	Bryan	50 min
Apr 11, 3:16 PM CDT	Special Weather Statement	OUN	Comanche	29 min
Apr 11, 3:50 PM CDT	Special Weather Statement	OUN	Canadian	25 min
Apr 11, 4:55 PM CDT	Special Weather Statement	OUN	McClain	35 min
Apr 11, 5:11 PM CDT	Special Weather Statement	OUN	Cleveland	34 min
Apr 11, 5:16 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland	29 min
Apr 11, 5:48 PM CDT	Special Weather Statement	OUN	Pottawatomie	27 min
Apr 11, 6:23 PM CDT	Special Weather Statement	OUN	Seminole	37 min
Apr 10, 7:44 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Knox	46 min
Apr 10, 8:12 PM CDT	Special Weather Statement	OUN	Wichita, Wilbarger	48 min
Apr 10, 8:22 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Foard, Knox, Wilbarger	53 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2016 Every severe thunderstorm warning in 2016

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; radar from the NEXRAD Level II archive.