Alert archive / South Carolina / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 134, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jun 24, 2017, 3:31 PM EDT for Greenville County, Spartanburg County, South Carolina. It was in force for 44 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 24, 2017, 3:31 PM EDT (19:31 UTC)
- Expired
- Jun 24, 2017, 4:15 PM EDT
- In force
- 44 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Greenville County, SC, Spartanburg County, SC
The radar
The Greer radar (KGSP), 18 km from the middle of the area, began a volume at 19:33 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 24, 3:46 PM EDT | TSTM WND DMG | 5 Nnw Greer, SC | DUKE POWER REPORTS APPROXIMATELY 1500 CUSTOMERS WITHOUT POWER DUE TO FALLEN TREES AND LIMBS DAMAGING POWERLINES NORTH OF GREER. |
| Jun 24, 3:46 PM EDT | TSTM WND DMG | Campobello, SC | GAZEBO WAS BLOWN AGAINST A HOUSE IN CAMPOBELLO-GRAMLING. TIME ESTIMATED FROM RADAR. |
| Jun 24, 4:06 PM EDT | TSTM WND DMG | Greer, SC | TREE DOWN ON A HOUSE IN GREER. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this severe thunderstorm warning; the first came 15 minutes after it went out.
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 nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.5 hours before the alert went out and 237 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1272 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
750
WUUS52 KGSP 241931
SVRGSP
SCC045-083-242015-
/O.NEW.KGSP.SV.W.0134.170624T1931Z-170624T2015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Greenville-Spartanburg SC
331 PM EDT SAT JUN 24 2017
The National Weather Service in Greenville-Spartanburg has issued a
* Severe Thunderstorm Warning for...
Northeastern Greenville County in Upstate South Carolina...
Northwestern Spartanburg County in Upstate South Carolina...
* Until 415 PM EDT
* At 331 PM EDT, severe thunderstorms were located along a line
extending from 8 miles south of Columbus to 17 miles southeast of
Hendersonville to 14 miles north of Downtown Greenville, moving
southeast at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Greer, Taylors, Boiling Springs SC, Duncan, Lyman, Wellford,
Slater-Marietta, Inman, Campobello and Lake Bowen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Scattered trees and power lines will be blown down in the warned
area. Seek shelter inside an interior room.
These storms are also producing extremely heavy rainfall. Flooding of
drainage ditches and low lying areas may occur. Small streams will
rise rapidly. Do not drive through areas where water is flowing over
the road.
Please report damaging winds, hail, or flooding to the National
Weather Service Greenville-Spartanburg by calling toll free, 1, 800,
2 6 7, 8 1 0 1, or by posting on our Facebook page, or Tweet it using
hashtag nwsgsp. Your message should describe the event and the
specific location where it occurred.
&&
LAT...LON 3507 8191 3495 8204 3489 8230 3505 8252
3511 8239 3519 8227
TIME...MOT...LOC 1931Z 298DEG 19KT 3514 8225 3509 8233 3506 8242
HAIL...0.75IN
WIND...60MPH
$$
083 follow-up statements
854
WWUS52 KGSP 241945
SVSGSP
Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
345 PM EDT SAT JUN 24 2017
SCC045-083-242015-
/O.CON.KGSP.SV.W.0134.000000T0000Z-170624T2015Z/
Greenville SC-Spartanburg SC-
345 PM EDT SAT JUN 24 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR NORTHEASTERN GREENVILLE AND NORTHWESTERN SPARTANBURG COUNTIES...
At 345 PM EDT, severe thunderstorms were located along a line
extending from 9 miles south of Columbus to 20 miles west of
Spartanburg to 10 miles north of Greenville Downtown, moving
southeast at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor hail damage to vehicles is expected. Expect wind
damage to trees and power lines.
Locations impacted include...
Greer, Taylors, Boiling Springs SC, Duncan, Lyman, Wellford, Inman,
Campobello, Lake Bowen and Lake Robinson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A few trees and power lines will be blown down in the warned area.
Hail can cause major property damage, especially to vehicles. Seek
shelter inside an interior room.
These storms are also producing extremely heavy rainfall. Flooding of
drainage ditches and low lying areas may occur. Small streams will
rise rapidly. Do not drive through areas where water is flowing over
the road.
Please report damaging winds, hail, or flooding to the National
Weather Service Greenville-Spartanburg by calling toll free, 1, 800,
2 6 7, 8 1 0 1, or by posting on our Facebook page, or Tweet it using
hashtag nwsgsp. Your message should describe the event and the
specific location where it occurred.
&&
LAT...LON 3501 8246 3507 8230 3517 8220 3507 8191
3495 8204 3489 8230
TIME...MOT...LOC 1945Z 303DEG 20KT 3511 8219 3504 8227 3500 8238
HAIL...1.00IN
WIND...60MPH
$$
08709
WWUS52 KGSP 241958
SVSGSP
Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
358 PM EDT SAT JUN 24 2017
SCC045-083-242015-
/O.CON.KGSP.SV.W.0134.000000T0000Z-170624T2015Z/
Greenville SC-Spartanburg SC-
358 PM EDT SAT JUN 24 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR EAST CENTRAL GREENVILLE AND NORTHWESTERN SPARTANBURG COUNTIES...
At 358 PM EDT, severe thunderstorms were located along a line
extending from 11 miles southeast of Columbus to 16 miles west of
Spartanburg to 6 miles northeast of Greenville Downtown, moving
southeast at 25 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Greer, Taylors, Boiling Springs SC, Duncan, Lyman, Wellford, Inman,
Campobello and Lake Bowen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Scattered trees and power lines will be blown down in the warned
area. Seek shelter inside an interior room.
These storms are also producing extremely heavy rainfall. Flooding of
drainage ditches and low lying areas may occur. Small streams will
rise rapidly. Do not drive through areas where water is flowing over
the road.
Please report damaging winds, hail, or flooding to the National
Weather Service Greenville-Spartanburg by calling toll free, 1, 800,
2 6 7, 8 1 0 1, or by posting on our Facebook page, or Tweet it using
hashtag nwsgsp. Your message should describe the event and the
specific location where it occurred.
&&
LAT...LON 3495 8238 3502 8225 3515 8214 3507 8191
3495 8204 3489 8230
TIME...MOT...LOC 1958Z 304DEG 21KT 3511 8210 3500 8220 3493 8233
HAIL...0.75IN
WIND...60MPH
$$
08873
WWUS52 KGSP 242012
SVSGSP
Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
412 PM EDT SAT JUN 24 2017
SCC045-083-242021-
/O.EXP.KGSP.SV.W.0134.000000T0000Z-170624T2015Z/
Greenville SC-Spartanburg SC-
412 PM EDT SAT JUN 24 2017
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL GREENVILLE AND
NORTHWESTERN SPARTANBURG COUNTIES WILL EXPIRE AT 415 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire. However gusty winds
are still possible with these thunderstorms.
If you observed large hail or wind damage, please report it to the
National Weather Service Greenville-Spartanburg by calling toll free,
1, 800, 2 6 7, 8 1 0 1, or by posting on our Facebook page, or Tweet
it using hashtag nwsgsp. Your message should describe the event and
the specific location where it occurred.
LAT...LON 3495 8238 3502 8225 3515 8214 3507 8191
3495 8204 3489 8230
TIME...MOT...LOC 2011Z 270DEG 19KT 3509 8204 3498 8214 3491 8227
$$
08What 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 Greenville-Spartanburg, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 24, 2:37 PM EDT, 54 minutes earlier.
Area forecast discussion, Jun 24, 2:37 PM EDT, 54 minutes before
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
237 PM EDT Sat Jun 24 2017
.SYNOPSIS...
A cold front will move southeast across the western Carolinas and
northeast Georgia this evening and then settle southeast of the
region overnight. Drier and cooler air will start to spread in from
the northwest through the day on Sunday, with these conditions
persisting through much of the week. Moisture will slowly return
around an offshore ridge of high pressure toward the end of the week.
&&
.NEAR TERM /THROUGH SUNDAY/...
As of 230 PM EDT: A broad 500 mb trough will persist over the
eastern CONUS through the near-term period. A cold front moving
southeast in the mean trough will pass east of the Blue Ridge by
evening, then settle southeast of the forecast area overnight. A
soupy pre-frontal airmass, with precipitable water values above two
inches across the eastern half of the area, will keep a heavy rain
and isolated flash flooding threat in place with any convection that
trains over a location. The convection developing off the Blue Ridge
will be the predominant rain maker through early evening as the
boundary moves southeast. Profiles continue to look a bit too warm
and moist for much in the way of severe weather, but mid levels will
begin drying from the west late this afternoon with a slow uptick in
surface to mid-level theta e lapses. Dewpoints in the lower 70s will
keep sbCAPE values in the 2000 to 2500 J/kg range southeast of the
front, but lapse rates will remain weak. Gusty winds and locally
heavy rainfall will remain the primary threats, with the focus
steadily shifting to the I-85 corridor and points southeast from
late afternoon through early evening.
Deeper layer drying will develop from the west overnight as the
frontal boundary gradually settles southeast of the region. Weak
northwest flow moisture may keep lower clouds banked up against the
southern Appalachians into Sunday morning, but little to no
continued shower activity is expected. Max temperatures may be
comparable to, or slightly higher than, today in the improving
sunshine, but humidity will be far more pleasant as dewpoints tumble
into the 50s and lower 60s.
&&
.SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY/...
As of 115 PM EDT Saturday: Mean upper trough continues to make
progress into the Eastern Conus allowing dry air through a deep
layer to overspread the region Sunday night and Monday. Still
expecting a precipitous tumbling of sfc dwpts and below normal
temperatures. Upper trough axis progresses into the region on
Tuesday with s/wv energy progged to advect through it's base. Short
range model consensus is trending a tad more responsive with this
feature, and may wind up ringing out some showers acrs NW NC.
Tuesday should wind up being the coolest day of the week thanks to
more the way of cloudiness and an increase in northerly llvl flow.
&&
.LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/...
As of 1230 PM EDT Saturday: Upper heights atop the SE Conus begin to
rise on Wednesday with llvl return flow just getting under way as
llvl ridge axis shifts to the coast. Little in the way of sensible
wx to speak of featuring temperatures and humidity levels below
climo. This trend continues into Thursday with an upward bump in max
temps and dwpts, but the atmosphere still should remain effectively
capped. A return to summertime warmth and humidity is expected for
Friday and Saturday within the progressively more moist, unstable
and less suppressed enviroment featuring daily thunderstorm chances.
&&
.AVIATION /19Z SATURDAY THROUGH THURSDAY/...
At KCLT: Convection continues to increase in coverage over the
foothills as the cold front slowly crosses the southern Appalachians
this afternoon. HRRR timing of the thunderstorms suggests peak
coverage around KCLT from 20Z to 00Z and this is featured in a
TEMPO. Although cigs should be primarily VFR going forward, any
precipitation will quickly take restrictions back into MVFR given
the moist airmass in place, and winds may become briefly gusty.
Anticipate a wind shift circa 04Z with fropa and strong drying
overnight into Sunday as winds trend northerly.
Elsewhere: Convective coverage will increase off the Blue Ridge this
afternoon and affect most terminal locations between 19Z and 00Z,
slightly earlier at KAVL and KHKY. MVFR cigs should lift to VFR this
afternoon but trend quickly back down to MVFR in any heavier showers
given the moist airmass. TEMPO gusts are likely at the foothills
sites near any thunderstorms. Expect clearing and drying from the
northwest post fropa during the overnight hours. Southwest winds
this afternoon will turn NW with fropa through the evening hours and
trend N to NE overnight into Sunday. Expect little more than a few
stratocumulus on Sunday with weak northwest flow moisture around
KAVL but drier across the foothills.
Outlook: The cold front will move away to the southeast through late
Sunday, with drier weather developing through most of next week.
Moisture will slowly return around an offshore ridge on Thursday.
Confidence Table...
18-24Z 00-06Z 06-12Z 12-18Z
KCLT High 95% High 100% High 100% High 100%
KGSP High 94% High 100% High 100% High 100%
KAVL High 99% High 100% High 91% High 95%
KHKY High 100% High 100% High 100% High 100%
KGMU High 92% High 100% High 100% High 100%
KAND High 92% High 100% High 100% High 100%
The percentage reflects the number of guidance members agreeing
with the scheduled TAF issuance flight rule category. Complete hourly
experimental aviation forecast consistency tables and ensemble forecasts
are available at the following link:
www.weather.gov/gsp/aviation
&&
.GSP WATCHES/WARNINGS/ADVISORIES...
GA...None.
NC...None.
SC...None.
&&
SYNOPSIS...HG
NEAR TERM...HG
SHORT TERM...CSH
LONG TERM...CSH
AVIATION...HGHazardous weather outlook, Jun 24, 3:21 PM EDT, 10 minutes before
Hazardous Weather Outlook National Weather Service Greenville-Spartanburg SC 321 PM EDT Sat Jun 24 2017 NCZ033-035-048>053-058-059-062>065-501>507-509-251930- Avery-Alexander-Madison-Yancey-Mitchell-Swain-Haywood-Buncombe- Graham-Northern Jackson-Macon-Southern Jackson-Transylvania- Henderson-Caldwell Mountains-Greater Caldwell-Burke Mountains- Greater Burke-McDowell Mountains-Eastern McDowell- Rutherford Mountains-Polk Mountains- 321 PM EDT Sat Jun 24 2017 This Hazardous Weather Outlook is for western North Carolina. .DAY ONE...This Afternoon and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. ..Sunday...No hazardous weather is expected at this time. ..Monday...No hazardous weather is expected at this time. ..Tuesday...No hazardous weather is expected at this time. ..Wednesday...No hazardous weather is expected at this time. ..Thursday...No hazardous weather is expected at this time. ..Friday...No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... None. GAZ010-017-018-026-028-029-NCZ036-037-056-057-068>072-082-508-510- SCZ001>014-019-251930- Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Iredell-Davie-Catawba- Rowan-Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-Union- Greater Rutherford-Eastern Polk-Oconee Mountains-Pickens Mountains- Greenville Mountains-Greater Oconee-Greater Pickens- Greater Greenville-Spartanburg-Cherokee-York-Anderson-Abbeville- Laurens-Chester-Greenwood- 321 PM EDT Sat Jun 24 2017 This Hazardous Weather Outlook is for northeast Georgia, piedmont North Carolina, and upstate South Carolina. .DAY ONE...This Afternoon and Tonight. A cold front will slowly cross the region from the northwest through this evening producing numerous showers and thunderstorms. Any of the storms will be capable of producing very gusty winds, cloud-to- ground lightning, and locally heavy rainfall. A few of the storms could also produce damaging wind gusts. Locations experiencing repeated thunderstorms may also see localized flash flooding. .DAYS TWO THROUGH SEVEN...Sunday through Friday. ..Sunday...No hazardous weather is expected at this time. ..Monday...No hazardous weather is expected at this time. ..Tuesday...No hazardous weather is expected at this time. ..Wednesday...No hazardous weather is expected at this time. ..Thursday...No hazardous weather is expected at this time. ..Friday...No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Skywarn spotters are requested to forward any reports of damaging winds, or flash flooding to our office.
In the hours before
Special weather statement, Jun 24, 1:56 PM EDT, 1 hour 35 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
156 PM EDT SAT JUN 24 2017
NCZ056-502-504-241845-
Greater Burke NC-Greater Caldwell NC-Catawba NC-
156 PM EDT SAT JUN 24 2017
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN CATAWBA...
SOUTHEASTERN CALDWELL AND BURKE COUNTIES UNTIL 245 PM EDT...
At 156 PM EDT, Doppler radar was tracking a strong thunderstorm 8
miles east of Marion, or near Lake James State Park, moving east at
20 mph.
Locations to be impacted include...
Morganton, Lenoir, Hickory, Longview, Sawmills, Granite Falls,
Valdese, Hudson, Icard and Cajah's Mountain.
Wind gusts up to 40 mph, pea size hail and very heavy rainfall rates
up to 2 inches per hour will be possible in these areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
The combination of gusty winds and saturated soil conditions will
cause scattered trees and power lines to fall. Seek shelter inside an
interior room.
&&
LAT...LON 3562 8130 3559 8171 3561 8172 3560 8174
3561 8176 3559 8177 3559 8179 3558 8180
3559 8180 3576 8187 3592 8144
TIME...MOT...LOC 1756Z 256DEG 19KT 3569 8186
KRENTZSpecial weather statement, Jun 24, 2:34 PM EDT, 57 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
234 PM EDT SAT JUN 24 2017
NCZ064-065-SCZ002-003-241900-
Transylvania NC-Henderson NC-Pickens Mountains SC-
Greenville Mountains SC-
234 PM EDT SAT JUN 24 2017
...AN AREA OF HEAVY RAIN WILL IMPACT EASTERN TRANSYLVANIA...CENTRAL
HENDERSON...NORTHWESTERN GREENVILLE AND NORTHWESTERN PICKENS COUNTIES
UNTIL 300 PM EDT...
At 234 PM EDT, Doppler radar indicated the leading edge of an area of
heavy rain along a line extending from 4 miles north of Brevard to 15
miles northwest of Pickens, and moving northeast at 55 mph.
Locations to be impacted include...
Brevard, Hendersonville, Etowah, Mountain Home, Laurel Park, Rosman,
Caesars Head State Park, Jones Gap State Park, Dupont State Forest
and Mills River.
Wind gusts up to 40 mph, pea size hail and very heavy rainfall rates
up to 2 inches per hour will be possible in these areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall may flood areas with poor drainage, such as
ditches and underpasses. Avoid these areas and do not cross flooded
roads. Water levels of small streams may also rise rapidly. Seek
higher ground if threatened by flood waters. Do not drive across
flooded roads.
&&
LAT...LON 3543 8242 3511 8256 3501 8291 3500 8293
3505 8290 3505 8294 3533 8272
TIME...MOT...LOC 1834Z 229DEG 50KT 3529 8270 3505 8288
KRENTZSpecial weather statement, Jun 24, 3:18 PM EDT, 13 minutes before
Special Weather Statement National Weather Service Greenville-Spartanburg SC 318 PM EDT SAT JUN 24 2017 NCZ036-056-069>072-241945- Gaston NC-Iredell NC-Lincoln NC-Cabarrus NC-Mecklenburg NC- Catawba NC- 318 PM EDT SAT JUN 24 2017 ...A STRONG THUNDERSTORM WILL IMPACT WESTERN CABARRUS...SOUTHEASTERN CATAWBA...SOUTH CENTRAL IREDELL...EASTERN LINCOLN...NORTHWESTERN MECKLENBURG AND NORTHEASTERN GASTON COUNTIES UNTIL 345 PM EDT... At 318 PM EDT, Doppler radar was tracking a strong thunderstorm 10 miles northeast of Lincolnton, or near Denver, moving southeast at 25 mph. Locations to be impacted include... Huntersville, Cornelius, Mt Holly, Davidson, Stanley, Westport, Lake Norman, Boger City, Iron Station and Denver. Wind gusts up to 40 mph and pea size hail will be possible in these areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... The combination of gusty winds and saturated soil conditions will cause scattered trees and power lines to fall. Seek shelter inside an interior room. && LAT...LON 3554 8125 3565 8108 3544 8069 3526 8106 TIME...MOT...LOC 1918Z 326DEG 36KT 3555 8108 KRENTZ
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 8:43 PM EDT | Special Weather Statement | GSP | Oconee | 32 min |
| Jun 23, 9:26 PM EDT | Severe Thunderstorm Warning | GSP | Anderson, Oconee, Pickens | 49 min |
| Jun 23, 10:45 PM EDT | Special Weather Statement | GSP | Greenville | 30 min |
| Jun 24, 2:47 PM EDT | Severe Thunderstorm Warning | GSP | Greenville | 43 min |
| Jun 24, 4:05 PM EDT | Special Weather Statement | GSP | Spartanburg | 25 min |
| Jun 24, 4:44 PM EDT | Special Weather Statement | GSP | Cherokee, Union | 46 min |
| Jun 24, 6:50 PM EDT | Special Weather Statement | GSP | Abbeville, Greenwood | 55 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2017Every severe thunderstorm warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.