Alert archive / North Carolina / Flash Flood Warnings in 2017

Flash Flood Warning 7, NWS Greenville-Spartanburg, SC

July 3, 2017Mecklenburg County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Jul 3, 2017, 7:21 PM EDT for Mecklenburg County, North Carolina. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 3, 2017, 7:21 PM EDT (23:21 UTC)
Expired
Jul 3, 2017, 10:15 PM EDT
In force
3 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Flood severity
None

County Mecklenburg County, NC

The radar

The Greer radar (KGSP), 138 km from the middle of the area, began a volume at 23:22 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood 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 nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.4 hours before the alert went out and 121 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2017-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 36 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2017-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
36 J/kg
Mixed-layer CIN
-121 J/kg
Mixed-layer LCL
1443 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

The text

As transmitted.

944 
WGUS52 KGSP 032321
FFWGSP
NCC119-040215-
/O.NEW.KGSP.FF.W.0007.170703T2321Z-170704T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
721 PM EDT MON JUL 3 2017

The National Weather Service in Greenville-Spartanburg has issued a

* Flash Flood Warning for...
  Central Mecklenburg County in the Piedmont of North Carolina...

* Until 1015 PM EDT

* At 718 PM EDT, Doppler radar and automated rain gauges indicated
  heavy rain falling across the warned area.  Up to two inches of 
  rain have fallen since 4 PM with an additonal 1 to 2 inches 
  possible over the next 2 hours. Flash flooding is already 
  occurring along Briar Creek and will likely continue through 10 PM.

* Some locations that will experience flooding include...
  The Plaza, Hidden Valley, East Charlotte, Central Charlotte and
  Northeast Charlotte.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Most flood deaths occur in vehicles. Do not attempt to cross
water-covered roadways, bridges, or low-level crossings. Only a few
inches of rapidly flowing water can carry away your vehicle. It is
not worth the risk. Please TURN AROUND, DON'T DROWN.

When it is safe to do so, please report flood waters or landslides
flowing over roads or threatening property to the National Weather
Service by calling toll free, 1, 800, 2 6 7, 8 1 0 1, by posting on
our Facebook page, or via Twitter using hashtag NWSGSP. Your message
should describe the event and the specific location where it
occurred, including roadways, nearby cross streets, stream names and
other landmarks.

&&

LAT...LON 3529 8074 3524 8072 3520 8080 3522 8082
      3526 8079

$$

CDG
2 follow-up statements
928 
WGUS72 KGSP 040023
FFSGSP

Flash Flood Statement
National Weather Service Greenville-Spartanburg SC
823 PM EDT MON JUL 3 2017

NCC119-040215-
/O.CON.KGSP.FF.W.0007.000000T0000Z-170704T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mecklenburg NC-
823 PM EDT MON JUL 3 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT FOR
CENTRAL MECKLENBURG COUNTY...

At 820 PM EDT, Doppler radar and automated rain gauges indicated 
that heavy rain was subsiding across the warned area.  Flash 
flooding is already occurring along Briar Creek, however flood 
waters are expected to recede by 9 to 10 PM.

Some locations that will experience flooding include...
The Plaza, Hidden Valley, East Charlotte, Central Charlotte and
Northeast Charlotte.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Most flood deaths occur in vehicles. Do not attempt to cross
water-covered roadways, bridges, or low-level crossings. Only a few
inches of rapidly flowing water can carry away your vehicle. It is
not worth the risk. Please TURN AROUND, DON'T DROWN.

When it is safe to do so, please report flood waters or landslides
flowing over roads or threatening property to the National Weather
Service by calling toll free, 1, 800, 2 6 7, 8 1 0 1, by posting on
our Facebook page, or via Twitter using hashtag NWSGSP. Your message
should describe the event and the specific location where it
occurred, including roadways, nearby cross streets, stream names and
other landmarks.

&&

LAT...LON 3529 8074 3524 8072 3520 8080 3522 8082
      3526 8079

$$

CDG
546 
WGUS72 KGSP 040209
FFSGSP

Flash Flood Statement
National Weather Service Greenville-Spartanburg SC
1009 PM EDT MON JUL 3 2017

NCC119-040218-
/O.EXP.KGSP.FF.W.0007.000000T0000Z-170704T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mecklenburg NC-
1009 PM EDT MON JUL 3 2017

...THE FLASH FLOOD WARNING FOR CENTRAL MECKLENBURG COUNTY WILL EXPIRE
AT 1015 PM EDT...

The heavy rain has ended. Flood waters have receded. Flooding is no
longer expected to pose a threat. Please continue to heed any
remaining road closures.

LAT...LON 3529 8074 3524 8072 3520 8080 3522 8082
      3526 8079

$$

CDG

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Jul 3, 4:40 PM EDT, 2 hours 41 minutes earlier.

Area forecast discussion, Jul 3, 4:40 PM EDT, 2 hours 41 minutes before
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
440 PM EDT Mon Jul 3 2017

.SYNOPSIS...
High pressure will remain centered over the western Atlantic
while a broad upper level trough persists over the eastern part
of the nation for the better part of this week. A weak cold front
will linger over the region through midweek, helping to focus the
development of showers and thunderstorms. An upper level disturbance
later in the week will initiate pattern change, leading to drier
and somewhat cooler conditions late in the weekend.

&&

.NEAR TERM /THROUGH TUESDAY/...
As of 440 PM EDT: PoPs have been increased slightly along the I-40
corridor in western NC, and also around KCLT and the lower SC
Upstate piedmont. Outflows are becoming active and driving coverage
up in these areas.

Otherwise, the forecast remains on track with the weather pattern
consisting of a broad weak trough over the eastern CONUS with
numerous, small embedded shortwaves and a very diffuse surface
trough along the Appalachians. Surface flow is very light and
variable, with the main focus for convection being orographic
effects. A second surface trough exists southeast of Charlotte late
this afternoon. MLCAPEs are around 500 to 1000 j/kg with little wind
shear. Downdraft parameters are also weak with low DCAPE and
delta-theta e. Severe outflows are possible, but would be low-end,
with some localized flooding from periods of torrential rain more
likely as PWATs remain near 2 inches and storms are slow-moving.

The general pattern does not change much over the next 36 hours. The
main feature of interest is a better-defined shortwave currently
over western TN that will approach the area overnight, with most of
the energy passing by the GSP CWA to the north. This feature will
keep a good chance for afternoon thunderstorms going again for
Tuesday. Temperatures will remain seasonally warm and humid with
lows a little above normal and highs near normal.

&&

.SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/...
As of 200 PM Monday: Short wave ridging aloft will gradually develop
over the region during the short term, while weak E/W-oriented
surface boundary and lee side/thermal troughs will linger through at
least Wed. These features will provide additional focus for
development of scattered afternoon/evening showers and storms (in
addition to the usual ridge top convergence/differential heating
effects) on Wed and Thu.

By the end of Thursday, an anomalously strong short wave trough is
forecast to be moving across the TN and Ohio Valleys. Although model
solutions offer slight variations in location/timing, it would
appear that any forcing associated with this feature would most
likely impact the forecast area well after peak heating Thu night.
However, strengthening wind fields aloft will result in improving
shear profiles, which could support some low-end organization of
convective clusters, and severe weather potential slightly higher
than the run-of-the-mill early summer pulse activity. Temps are
expected to remain near to slightly above climo through the period.

&&

.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
As of 210 PM Monday: Low-amplitude long wave troughing will become
established across the East early in the medium range, and persist
through the period. Transitory short wave troughs passing near the
forecast area and attendant weak frontal passages are anticipated
Friday, and again in the Sunday/Monday time frame. These days are
therefore expected to see some degree of enhancement of diurnal
convective chances. In fact, timing of the initial short wave (Thu
night/early Friday) and attendant establishment of a LLJ Thu night
may allow convection to linger well beyond the typical diurnal
cycle. Otherwise, wind profiles should remain a bit stronger than
typical for the time of year, so the potential for low-end
organization of convection will persist each afternoon. Temps will
generally remain around normal through the period.

&&

.AVIATION /21Z MONDAY THROUGH SATURDAY/...
At KCLT and elsewhere:  Weakly forced tropical conditions will
continue again with late afternoon thunderstorms and generally light
and variable surface winds away from the storms. The mountains are
the main focus for initiating showers this afternoon with coverage
increasing into the evening as showers move slowly southeast into
piedmont areas, and then decrease around sunset. However, a
secondary maximum will line up along the I-40 corridor near KHKY and
also east of KCLT in low level convergence. Any thunderstorms will
temporarily produce greatly degraded ceiling, visibility, and
low-level wind shear conditions. Shallow fog and some low overcast
are possible again in the morning, especially at KAVL, and any areas
receiving appreciable rainfall this afternoon.  Similar conditions
will be in-place on Tuesday as general weather pattern changes
little.

Outlook: Moist and unsettled weather will continue through most of
the week. Nocturnal restrictions can be expected in locations
receiving heavy rainfall.

Confidence Table...

            20-02Z        02-08Z        08-14Z        14-18Z
KCLT       High 100%     High 100%     High  95%     High 100%
KGSP       High  97%     High 100%     High 100%     High  98%
KAVL       High 100%     High  95%     High 100%     High  94%
KHKY       High 100%     High 100%     High  98%     High 100%
KGMU       High 100%     High 100%     High 100%     High 100%
KAND       High  97%     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...CSH
NEAR TERM...HG/WJM
SHORT TERM...JDL
LONG TERM...JDL
AVIATION...HG/WJM
Hazardous weather outlook, Jul 3, 5:31 PM EDT, 1 hour 50 minutes before
Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
531 PM EDT Mon Jul 3 2017

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-042145-
Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Avery-Alexander-
Iredell-Davie-Madison-Yancey-Mitchell-Swain-Haywood-Buncombe-Catawba-
Rowan-Graham-Northern Jackson-Macon-Southern Jackson-Transylvania-
Henderson-Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-Union-
Caldwell Mountains-Greater Caldwell-Burke Mountains-Greater Burke-
McDowell Mountains-Eastern McDowell-Rutherford Mountains-
Greater Rutherford-Polk Mountains-Eastern Polk-Oconee Mountains-
Pickens Mountains-Greenville Mountains-Greater Oconee-
Greater Pickens-Greater Greenville-Spartanburg-Cherokee-York-
Anderson-Abbeville-Laurens-Chester-Greenwood-
531 PM EDT Mon Jul 3 2017

This Hazardous Weather Outlook is for northeast Georgia, piedmont
North Carolina, western North Carolina and upstate South Carolina.

.DAY ONE...Tonight.

Scattered thunderstorms and heavy rain showers will continue to
develop across the area into the evening hours. The main threats will
be from locally very heavy rainfall and cloud to ground lightning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

..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.
..Saturday...No hazardous weather is expected at this time.
..Sunday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

Lane

In the hours before

Special weather statement, Jul 3, 4:07 PM EDT, 3 hours 14 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
407 PM EDT MON JUL 3 2017

SCZ012-032030-
Laurens SC-
407 PM EDT MON JUL 3 2017

...A STRONG THUNDERSTORM WILL IMPACT EAST CENTRAL LAURENS COUNTY
UNTIL 430 PM EDT...

At 407 PM EDT, Doppler radar was tracking a strong thunderstorm 9
miles east of Laurens, or over Clinton, moving northeast at 10 mph.

Locations to be impacted include...
Clinton.

Wind gusts up to 40 mph and pea size hail 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 3449 8197 3459 8187 3458 8186 3459 8186
      3460 8184 3459 8183 3448 8171 3441 8190
TIME...MOT...LOC 2007Z 235DEG 8KT 3448 8187

CDG
Special weather statement, Jul 3, 5:27 PM EDT, 1 hour 54 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
527 PM EDT MON JUL 3 2017

NCZ071-032200-
Mecklenburg NC-
527 PM EDT MON JUL 3 2017

...A STRONG THUNDERSTORM WITH INTENSE LIGHTNING WILL IMPACT CENTRAL
MECKLENBURG COUNTY UNTIL 600 PM EDT...

At 527 PM EDT, Doppler radar was tracking a strong thunderstorm with
intense lightning near Uptown Charlotte, or near Central Charlotte,
moving east at 5 mph.

Locations to be impacted include...
Uptown Charlotte, Central Charlotte, South Charlotte, Southwest
Charlotte, East Charlotte, Freedom Park, The Plaza, Charlotte Douglas
Airport, The Arboretum and Hidden Valley.

In addition to intense lightning, wind gusts up to 45 mph and pea
size hail 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.

Frequent lightning is occurring with this storm. If outdoors, try to
get indoors or into a hard topped vehicle. Otherwise, stay away from
open areas and isolated high objects such as trees. When indoors,
stay away from windows and doors and avoid using wired electronic
devices. Do not take a shower or bath. Try to unplug unnecessary
appliances before the storm approaches.

&&

LAT...LON 3514 8096 3526 8095 3531 8075 3509 8074
TIME...MOT...LOC 2127Z 267DEG 6KT 3520 8086

CDG
Special weather statement, Jul 3, 5:47 PM EDT, 1 hour 34 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
547 PM EDT MON JUL 3 2017

NCZ036-056-069-071-032215-
Iredell NC-Lincoln NC-Mecklenburg NC-Catawba NC-
547 PM EDT MON JUL 3 2017

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN CATAWBA...SOUTH
CENTRAL IREDELL...NORTHEASTERN LINCOLN AND NORTH CENTRAL MECKLENBURG
COUNTIES UNTIL 615 PM EDT...

At 546 PM EDT, Doppler radar was tracking a strong thunderstorm 11
miles northwest of Huntersville, or near Westport, moving east at 5
mph.

Locations to be impacted include...
Cornelius, Westport, Lake Norman, Denver, Ramsey Creek Park,
Davidson, Mooresville, Terrell, Doolie and Sherrills Ford.

Wind gusts up to 40 mph and pea size hail 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.

Lake Norman is in the path of this storm. Cloud to ground lightning
and gusty winds will create dangerous boating conditions.
Move to shore immediately.

&&

LAT...LON 3547 8105 3560 8105 3562 8087 3545 8086
TIME...MOT...LOC 2146Z 268DEG 5KT 3553 8099

CDG
Special weather statement, Jul 3, 6:25 PM EDT, 56 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
625 PM EDT MON JUL 3 2017

SCZ007-008-032300-
Cherokee SC-Spartanburg SC-
625 PM EDT MON JUL 3 2017

...A STRONG THUNDERSTORM WITH INTENSE LIGHTNING WILL IMPACT EAST
CENTRAL SPARTANBURG AND CENTRAL CHEROKEE COUNTIES UNTIL 700 PM EDT...

At 624 PM EDT, Doppler radar was tracking a strong thunderstorm with
intense lightning 7 miles southwest of Gaffney, or 4 miles north of
Pacolet Mills, moving northeast at 15 mph.

Locations to be impacted include...
Gaffney, Pacolet, Cowpens, Pacolet Mills and Thicketty.

In addition to intense lightning, wind gusts up to 40 mph and pea
size hail 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.

Frequent lightning is occurring with this storm. If outdoors, try to
get indoors or into a hard topped vehicle. Otherwise, stay away from
open areas and isolated high objects such as trees. When indoors,
stay away from windows and doors and avoid using wired electronic
devices. Do not take a shower or bath. Try to unplug unnecessary
appliances before the storm approaches.

&&

LAT...LON 3501 8185 3513 8167 3493 8154 3492 8164
      3491 8168 3491 8171 3490 8173 3489 8178
TIME...MOT...LOC 2224Z 241DEG 14KT 3498 8173

CDG
Special weather statement, Jul 3, 6:56 PM EDT, 25 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
656 PM EDT MON JUL 3 2017

NCZ068-032330-
Cleveland NC-
656 PM EDT MON JUL 3 2017

...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN CLEVELAND COUNTY
UNTIL 730 PM EDT...

At 656 PM EDT, Doppler radar was tracking a strong thunderstorm 8
miles southwest of Shelby, or near Boiling Springs NC, moving
northeast at 5 mph.

Locations to be impacted include...
Boiling Springs NC, Lattimore, Mooresboro, Earl and Cliffside.

Wind gusts up to 40 mph and pea size hail 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 3534 8165 3521 8151 3517 8163 3518 8165
      3518 8174 3520 8177 3526 8175
TIME...MOT...LOC 2256Z 232DEG 5KT 3522 8167

CDG
Local storm report, Jul 3, 7:05 PM EDT, 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
705 PM EDT MON JUL 03 2017

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

0630 PM     FLOOD            4 NE CHARLOTTE          35.24N 80.77W
07/03/2017                   MECKLENBURG        NC   BROADCAST MEDIA

            BRIAR CREEK OUT OF ITS BANKS IN THE 3200 BLOCK OF
            SHAMROCK DR. STANDING WATER IN THE PARK SURROUNDING THE
            METHODIST HOME RECREATION CENTER.

&&

CARROLL

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 3, 1:34 PM EDTSpecial Weather StatementGSPAvery26 min
Jul 3, 2:00 PM EDTSpecial Weather StatementGSPAvery30 min
Jul 3, 2:29 PM EDTAreal Flood AdvisoryGSPAvery, Burke, Caldwell2 hr
Jul 3, 3:37 PM EDTSpecial Weather StatementGSPBurke23 min
Jul 3, 3:41 PM EDTSpecial Weather StatementGSPMcDowell34 min
Jul 3, 3:51 PM EDTSpecial Weather StatementGSPAlexander39 min
Jul 3, 5:27 PM EDTSpecial Weather StatementGSPMecklenburg33 min
Jul 3, 5:47 PM EDTSpecial Weather StatementGSPLincoln28 min
Jul 3, 6:47 PM EDTAreal Flood AdvisoryGSPMecklenburg118 min
Jul 3, 6:56 PM EDTSpecial Weather StatementGSPCleveland34 min

Nearby

Flash Flood Warnings in North Carolina, 2017Every flash flood 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.