Alert archive / Mississippi / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 304, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Jun 9, 2013, 7:49 PM CDT for Issaquena County, Warren County, Mississippi; East Carroll Parish, Madison Parish, Louisiana. It was in force for 56 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 9, 2013, 7:49 PM CDT (00:49 UTC)
- Expired
- Jun 9, 2013, 8:45 PM CDT
- In force
- 56 min
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
Counties East Carroll Parish, LA, Madison Parish, LA, Issaquena County, MS, Warren County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 107 km from the middle of the area, began a volume at 00:49 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
Jackson, MS (KJAN), launched 00:00Z, 0.8 hours before the alert went out and 97 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.
- Mixed-layer CAPE
- 744 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 880 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 Jackson, MS wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 9, 3:56 PM CDT, 3 hours 53 minutes earlier.
Area forecast discussion, Jun 9, 3:56 PM CDT, 3 hours 53 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSON MS 356 PM CDT SUN JUN 9 2013 .SHORT TERM...TONIGHT THROUGH TUESDAY NIGHT...CONVECTION IS ONGOING THIS AFTERNOON BUT HAS REMAINED FAIRLY TAME THUS FAR. THE MAJORITY OF THE ACTIVITY HAS BEEN GENERALLY ALONG AND EAST OF THE INTERSTATE 55 CORRIDOR WHERE LIFT FROM AN UPPER DISTURBANCE HAS COMBINED WITH ADEQUATE MOISTURE(PW VALUES IN EXCESS OF 1.7 TO NEAR 2 INCHES PER LATEST MESOANALYSIS) AND DAYTIME HEATING. MUCH OF THIS ACTIVITY SHOULD REMAIN BELOW SEVERE LIMITS THOUGH THERE COULD BE SOME LOCALLY HEAVY DOWNPOURS THAT MAY LEAD TO LOCALIZED FLASH FLOODING GIVEN POTENTIAL FOR BACKBUILDING STORMS. IN ADDITION...AN UPPER LEVEL TROUGH IS CURRENTLY LOCATED ACROSS THE CENTRAL PLAINS TRACKING EAST. AS THIS FEATURE ENHANCES LIFT ACROSS OUR AREA...THIS SHOULD HELP GENERATE CONVECTION ACROSS MY WESTERN ZONES THIS AFTERNOON INTO THE EVENING HOURS. GIVEN THAT THIS AREA REMAINS UNTAPPED FROM PREVIOUS CONVECTION....THERE STILL REMAINS THE POTENTIAL FOR STRONG TO SEVERE STORMS IN THIS REGION. BASED ON LATEST MESOANALYSIS...LOW LEVEL LAPSE RATES NEAR 8 C/KM AND SHEAR VALUES EXCEEDING 25-30KTS WITH SUFFICIENT SBCAPE SHOULD GENERATE SOME VIGOROUS CONVECTION WITH POTENTIAL FOR GUSTY WINDS UP TO 60MPH AND SMALL HAIL. AS THE UPPER TROUGH TRACKS EAST...STORM ACTIVITY SHOULD CONTINUE EAST AS WELL...ESPECIALLY FOR LOCATIONS ALONG AND NORTH OF I-20. OTHER CONVECTION SHOULD GRADUALLY DIMINISH WITH LOSS OF DAYTIME HEATING. BY 12Z MONDAY THE UPPER LOW WILL BE LOCATED ACROSS THE ILLINOIS-INDIANA BORDER WITH THE MAIN TROUGH AXIS ACROSS THE EASTERN SECTION OF MY CWA. SOME OF THE HI-RES MODELS INDICATE THAT ALL OF THE CONVECTION ASSOCIATED WITH THIS SHOULD BE OUT OF THE CWA BY MONDAY MORNING. OTHER GLOBAL MODELS ARE A LITTLE LESS PROGRESSIVE. HAVE LEFT IN MOS POPS DURING THE MORNING HOURS TO ACCOUNT FOR RESIDUAL/SLOWER PROGRESSION OF CONVECTION. BEYOND THIS...MUCH OF THE MODEL GUIDANCE DOES INDICATE THAT DRIER AIR WILL MOVE IN AS UPPER RIDGING TO THE WEST STARTS TO EASE INTO THE REGION. HAVE GONE AHEAD AND FOLLOWED CONSENSUS AND LEFT THE AFTERNOON DRY FOR THE REGION. TEMPERATURES SHOULD BE ABLE TO WARM INTO THE 90S MONDAY FOLLOWING MORNING CONVECTION. THE UPPER TROUGH WILL BE EAST OF THE REGION BY MONDAY EVENING...LEAVING THE ARKLAMISS REGION UNDER NORTHWEST FLOW ALOFT AS THE RIDGE OVER THE SOUTHERN PLAINS STARTS TO PROGRESS EASTWARD. GUIDANCE POPS HAVE CONTINUED TO COME IN DRIER FOR MONDAY NIGHT AND FEEL THIS IS FAIRLY GOOD. HOWEVER...GIVEN THE NORTHWEST FLOW ALOFT THERE IS SOME SUGGESTION IN THE MODELS THERE COULD BE A WEAK DISTURBANCE THAT MOVES THROUGH EASTERN MISSISSIPPI/NORTHERN ALABAMA MONDAY NIGHT. THIS IS SHOWN TO HAVE POTENTIAL TO CLIP MY FAR NORTHEASTERN ZONES NEAR THE GOLDEN TRIANGLE AREA. HAVE LEFT IN SLIGHT CHANCE POPS FOR THIS POSSIBILITY. BY TUESDAY...591DM HEIGHTS WILL BE WELL ENTRENCHED OVER THE REGION AND MUCH DRIER WEATHER IS EXPECTED. NORMALLY THIS WOULD SUGGEST PRETTY HOT CONDITIONS. HOWEVER...GIVEN HOW WET THE REGION HAS BEEN...THIS SHOULD KEEP HIGH TEMPERATURES FROM REACHING THE MID TO UPPER 90S. MAV HIGHS WERE CUT BY A COUPLE OF DEGREES AT MANY SITES TO ACCOUNT FOR THIS. DESPITE SLIGHTLY LOWER TEMPERATURES(BUT STILL IN THE LOW TO MID 90S)... CONDITIONS WILL BE STEAMY AS DEWPOINTS WILL REMAIN HIGH. THIS WILL LEAD TO HIGHER HEAT INDICES ACROSS THE REGION. AREAWIDE...WE COULD SEE HEAT INDICES FROM 97-99 DEGREES AND EVEN EXCEEDING 100 DEGREES NORTH OF I-20. OVERNIGHT LOWS THROUGH THE PERIOD WILL REMAIN WARM INTO THE UPPER 60S/LOWER 70S. /28/ .LONG TERM...WEDNESDAY THROUGH SUNDAY...PRETTY QUIET CONDITIONS LOOK TO BE IN STORE TUESDAY AND BEYOND AS THE ARKLAMISS IS SITUATED ON THE EASTERN PERIPHERY OF A SUBTROPICAL RIDGE CENTERED OVER THE SOUTH-CENTRAL PLAINS. SOUTHWESTERLY SURFACE WINDS TUE AND WED AFTERNOON MAY AID IN SEA BREEZE ENCROACHMENT ON OUR SOUTHERN ZONES WHICH COULD BRING ISOLATED SHOWERS OR STORMS. OTHERWISE IT LOOKS QUIET WITH AFTERNOON TEMPS IN THE LOWER TO MIDDLE 90S EACH AFTERNOON...SOME 3 TO 6 DEGREES ABOVE NORMAL. A COOL FRONT WILL APPROACH THE REGION SOMETIME THU AFTERNOON OR EVENING WHICH SHOULD BRING A DECENT (NOT TERRIFIC) CHANCE FOR SHOWER AND THUNDERSTORM ACTIVITY DURING THIS TIME. CONVECTION ALONG/AHEAD OF THE FRONT WILL HAVE AN ABUNDANCE OF INSTABILITY TO WORK WITH DUE TO THE WARM SURFACE TEMPS AND DEW POINTS IN THE LOWER 70S SO WE'LL HAVE TO KEEP AN EYE ON THE STRONG/SEVERE STORM POTENTIAL AS IT'S NOT OUT OF THE QUESTION. LOOKS LIKE THE SLIGHTLY DRIER AIR IN WAKE OF THE FRONT WILL OVERSPREAD THE NORTHEASTERN HALF OF THE AREA FRI INTO SAT BEFORE THE FRONT WASHES OUT. WEAK CONVERGENCE IN VICINITY OF THE FRONT NOW SITUATED SOMEWHERE ALONG OR SOUTH OF I-20 COULD VERY WELL PROVIDE IMPETUS FOR ADDITIONAL DIURNAL CONVECTION BOTH FRI AND SAT AFTERNOONS...ALTHOUGH THE GFS IS NOT QUITE CONVINCED AS IT SHOWS THE UPPER RIDGE/STRONG SUBSIDENCE CENTERED ALMOST DIRECTLY OVER THE REGION. ANY CHANCE FOR SHOWERS AND STORMS SUNDAY WILL ALSO BE TIED TO THE POSITION OF THE UPPER RIDGE...UNCERTAINTY ABOUNDS. OTHER THAN A FEW MINOR ADJUSTMENTS TO AFTERNOON HIGHS THE GFS MOS TEMPS AND POPS LOOKED REASONABLE AND WERE GENERALLY FOLLOWED. /BK/ && .AVIATION...FOCUS FOR THE REMAINDER OF THE AFTERNOON WILL BE TIMING STORMS AND ANY IMPACTS TO TERMINAL SITES. MAIN PRECIP REGION IS ACROSS THE E HALF. HOWEVER...LATE AFTERNOON/EVENING ACTIVITY IS EXPECTED ACROSS THE W/NW LOCATIONS. STRONGER WIND GUSTS WILL BE POSSIBLE WITH THIS LATER ACTIVITY. LATER TONIGHT...FOCUS WILL SHIFT TO POTENTIAL MVFR CEILINGS WITH AN OCCASIONAL OPPORTUNITY FOR SOME IFR CEILINGS. SOME MVFR VIS CONDITIONS MAY ALSO OCCUR. /CME/ && .PRELIMINARY POINT TEMPS/POPS... JACKSON 68 91 71 94 / 63 10 1 3 MERIDIAN 69 91 68 94 / 67 23 6 3 VICKSBURG 67 91 69 93 / 53 3 1 4 HATTIESBURG 71 91 71 95 / 50 35 7 3 NATCHEZ 70 90 70 93 / 40 10 5 3 GREENVILLE 69 92 71 94 / 48 3 1 4 GREENWOOD 68 90 70 94 / 60 5 1 4 && .JAN WATCHES/WARNINGS/ADVISORIES... MS...NONE. LA...NONE. AR...NONE. && 28/BK/CME
Hazardous weather outlook, Jun 9, 2:20 PM CDT, 5 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 220 PM CDT SUN JUN 9 2013 ARZ074-075-LAZ007>009-015-016-023-025-MSZ018-019-025>029-034>036- 040>042-047-101930- ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND- MADISON LA-FRANKLIN LA-TENSAS-BOLIVAR-SUNFLOWER-LEFLORE-GRENADA- CARROLL-MONTGOMERY-WEBSTER-WASHINGTON-HUMPHREYS-HOLMES-ISSAQUENA- SHARKEY-YAZOO-WARREN- 220 PM CDT SUN JUN 9 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST LOUISIANA... EXTREME SOUTHEAST ARKANSAS AND PORTIONS OF CENTRAL MISSISSIPPI. .DAY ONE...TONIGHT AND MONDAY STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON AND EVENING. THE STRONGEST STORMS COULD CONTAIN 50 TO 60 MPH WIND GUSTS AND SMALL HAIL. MANY STORMS WILL BE CAPABLE OF PRODUCING FREQUENT CLOUD TO GROUND LIGHTNING STRIKES AND HEAVY DOWNPOURS. .DAYS TWO THROUGH SEVEN...MONDAY NIGHT THROUGH SATURDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER CALL TO ACTION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS...MAY BE NEEDED INTO THIS EVENING. LAZ024-026-MSZ030>033-037>039-043>046-048>066-072>074-101930- CATAHOULA-CONCORDIA-CLAY-LOWNDES-CHOCTAW-OKTIBBEHA-ATTALA-WINSTON- NOXUBEE-MADISON MS-LEAKE-NESHOBA-KEMPER-HINDS-RANKIN-SCOTT-NEWTON- LAUDERDALE-CLAIBORNE-COPIAH-SIMPSON-SMITH-JASPER-CLARKE-JEFFERSON- ADAMS-FRANKLIN MS-LINCOLN-LAWRENCE-JEFFERSON DAVIS-COVINGTON- JONES-MARION-LAMAR-FORREST- 220 PM CDT SUN JUN 9 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL MISSISSIPPI AND PORTIONS OF EAST CENTRAL LOUISIANA. .DAY ONE...TONIGHT AND MONDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...MONDAY NIGHT THROUGH SATURDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER CALL TO ACTION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS IS NOT EXPECTED THROUGH NEXT SATURDAY. FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.SRH.NOAA.GOV/JAN. CME
In the hours before
Special weather statement, Jun 9, 5:29 PM CDT, 2 hours 20 minutes before
MSZ036-092315-
HOLMES MS-
529 PM CDT SUN JUN 9 2013
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
529 PM CDT SUN JUN 9 2013
A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
40 TO 50 MPH WINDS WAS LOCATED 3 MILES WEST OF HOWARD AT 529 PM
CDT...MOVING EAST AT 15 MPH.
VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING ARE
ALSO POSSIBLE WITH THIS STORM.
HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.
PEOPLE IN NORTHERN HOLMES COUNTY SHOULD MONITOR THIS STORM CLOSELY.
LAT...LON 3326 8993 3316 8986 3314 8991 3301 9029
3311 9036 3314 9033 3320 9033 3332 9011
TIME...MOT...LOC 2229Z 248DEG 14KT 3312 9024
19Special weather statement, Jun 9, 6:21 PM CDT, 1 hour 28 minutes before
LAZ007-015-100005-
RICHLAND LA-MOREHOUSE LA-
621 PM CDT SUN JUN 9 2013
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
621 PM CDT SUN JUN 9 2013
A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
35 TO 45 MPH WINDS WAS LOCATED 5 MILES NORTH OF START AT 621 PM
CDT...MOVING EAST AT 15 MPH.
VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING ARE
ALSO POSSIBLE WITH THIS STORM.
HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.
PEOPLE IN SOUTH CENTRAL MOREHOUSE AND NORTHERN RICHLAND PARISHES
SHOULD MONITOR THIS STORM CLOSELY.
LAT...LON 3264 9192 3275 9164 3272 9162 3271 9164
3269 9162 3267 9164 3266 9160 3258 9159
3258 9155 3254 9154 3245 9190 3250 9192
3253 9191 3259 9194
TIME...MOT...LOC 2321Z 249DEG 14KT 3257 9184
19Special weather statement, Jun 9, 6:28 PM CDT, 1 hour 21 minutes before
MSZ036-100015-
HOLMES MS-
628 PM CDT SUN JUN 9 2013
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
628 PM CDT SUN JUN 9 2013
A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
40 TO 50 MPH WINDS WAS LOCATED OVER LEXINGTON AT 628 PM CDT...MOVING
NORTHEAST AT 20 MPH.
VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING ARE
ALSO POSSIBLE WITH THIS STORM.
HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.
PEOPLE IN EASTERN HOLMES COUNTY SHOULD MONITOR THIS STORM CLOSELY.
LAT...LON 3321 8975 3320 8976 3319 8978 3317 8977
3316 8979 3313 8979 3311 8983 3309 8982
3308 8983 3297 9009 3312 9020 3328 8996
TIME...MOT...LOC 2328Z 246DEG 16KT 3310 9005
19Special weather statement, Jun 9, 6:35 PM CDT, 1 hour 14 minutes before
MSZ049-100015- RANKIN MS- 635 PM CDT SUN JUN 9 2013 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSON MS 635 PM CDT SUN JUN 9 2013 A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND 35 TO 45 MPH WINDS WAS LOCATED 6 MILES SOUTHEAST OF BRANDON AT 635 PM CDT...MOVING EAST AT 30 MPH. VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING ARE ALSO POSSIBLE WITH THIS STORM. HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES. PEOPLE IN CENTRAL RANKIN COUNTY SHOULD MONITOR THIS STORM CLOSELY. LAT...LON 3231 9001 3235 8973 3214 8973 3213 8998 TIME...MOT...LOC 2335Z 263DEG 28KT 3223 8989 19
Special weather statement, Jun 9, 7:05 PM CDT, 44 minutes before
LAZ015-023-100105-
RICHLAND LA-FRANKLIN LA-
705 PM CDT SUN JUN 9 2013
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
705 PM CDT SUN JUN 9 2013
A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
40 TO 50 MPH WINDS WAS LOCATED OVER BUCKNER AT 705 PM CDT...MOVING
EAST AT 15 MPH.
VERY HEAVY RAIN ALONG WITH CONTINUOUS CLOUD TO GROUND LIGHTNING ARE
ALSO POSSIBLE WITH THIS STORM.
HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.
PEOPLE IN NORTH CENTRAL FRANKLIN AND SOUTHWESTERN RICHLAND PARISHES
SHOULD MONITOR THIS STORM CLOSELY.
LAT...LON 3233 9202 3238 9201 3246 9170 3223 9164
3219 9201 3221 9200 3226 9201 3227 9200
3227 9203 3229 9204
TIME...MOT...LOC 0005Z 258DEG 12KT 3229 9196
19Local storm report, Jun 9, 7:39 PM CDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
739 PM CDT SUN JUN 09 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0710 PM TSTM WND DMG 2 SE LEXINGTON 33.10N 90.02W
06/09/2013 HOLMES MS LAW ENFORCEMENT
ONE TREE DOWN ON HIGHWAY 17. REPORTED BY LEXINGTON PD
&&The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 8:38 PM CDT | Special Weather Statement | JAN | Carroll, Montgomery | 57 min |
| Jun 9, 8:50 PM CDT | Special Weather Statement | JAN | Holmes | 60 min |
| Jun 9, 9:36 PM CDT | Flash Flood Warning | JAN | Holmes | 84 min |
| Jun 9, 9:37 PM CDT | Special Weather Statement | JAN | Webster | 43 min |
| Jun 9, 9:42 PM CDT | River Flood Advisory | JAN | Adams, Wilkinson | 36 hr |
| Jun 9, 7:05 PM CDT | Special Weather Statement | JAN | Richland | 60 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 2013Severe Thunderstorm Warnings in Louisiana, 2013Every severe thunderstorm warning in 2013
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.