Alert archive / Nebraska / Flash Flood Warnings in 2016

Flash Flood Warning 29, NWS Omaha, NE

August 23, 2016Cass County, Lancaster County, Saunders County, Nebraska

NWS Omaha, NE issued this flash flood warning at Aug 23, 2016, 11:58 PM CDT for Cass County, Lancaster County, Saunders County, Nebraska. 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: Aug 23, 2016, 11:58 PM CDT (04:58 UTC)
Expired: Aug 24, 2016, 3:00 AM CDT
In force: 3 hr
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Flood severity: None

Counties Cass County, NE, Lancaster County, NE, Saunders County, NE

The radar

The Omaha radar (KOAX), 36 km from the middle of the area, began a volume at 05:00 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

Omaha, NE (KOAX), launched 00:00Z, 5.0 hours before the alert went out and 36 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: 2165 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1003 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 400 m²/s²
Significant tornado parameter: 2.8
Supercell composite: 15.4

Open this sounding in Storm Lab

The text

As transmitted.

901 
WGUS53 KOAX 240458
FFWOAX
NEC025-109-155-240800-
/O.NEW.KOAX.FF.W.0029.160824T0458Z-160824T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1158 PM CDT TUE AUG 23 2016

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN CASS COUNTY IN SOUTHEASTERN NEBRASKA...
  SOUTHEASTERN SAUNDERS COUNTY IN EAST CENTRAL NEBRASKA...
  NORTHEASTERN LANCASTER COUNTY IN SOUTHEASTERN NEBRASKA...

* UNTIL 300 AM CDT

* AT 1157 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN OF 1 TO 3 INCHES IN A SHORT TIME ACROSS THE WARNED
  AREA. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ASHLAND...LOUISVILLE...GREENWOOD...MURDOCK...SOUTH BEND...
  MAHONEY STATE PARK...
  PLATTE RIVER STATE PARK AND CAMP CAROL JOY HOLLING.

THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 415 AND
426.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4106 9633 4103 9631 4102 9630 4101 9625
      4099 9623 4100 9616 4090 9622 4089 9646
      4107 9647

$$

ZAPOTOCNY

2 follow-up statements

157 
WGUS73 KOAX 240701
FFSOAX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
201 AM CDT WED AUG 24 2016

NEC025-109-155-240800-
/O.CON.KOAX.FF.W.0029.000000T0000Z-160824T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CASS NE-SAUNDERS NE-LANCASTER NE-
201 AM CDT WED AUG 24 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 AM CDT FOR
NORTHWESTERN CASS...SOUTHEASTERN SAUNDERS AND NORTHEASTERN LANCASTER
COUNTIES...

AT 159 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS PARTS OF THE WARNED AREA.  FLASH FLOODING WILL
REMAIN POSSIBLE THROUGH 300 AM CDT. DOPPLER RADAR RAINFALL ESTIMATES
WERE FROM TWO TO FIVE INCHES UP TO 2 AM CDT. 

SOME LOCATIONS THAT COULD EXPERIENCE FLOODING INCLUDE...
ASHLAND...LOUISVILLE...GREENWOOD...MURDOCK...SOUTH BEND...
MAHONEY STATE PARK...
PLATTE RIVER STATE PARK AND CAMP CAROL JOY HOLLING.

THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 415 AND
426.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4106 9633 4103 9631 4102 9630 4101 9625
      4099 9623 4100 9616 4090 9622 4089 9646
      4107 9647

$$

MILLER

159 
WGUS73 KOAX 240753
FFSOAX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
253 AM CDT WED AUG 24 2016

NEC025-109-155-240802-
/O.EXP.KOAX.FF.W.0029.000000T0000Z-160824T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CASS NE-SAUNDERS NE-LANCASTER NE-
253 AM CDT WED AUG 24 2016

...THE FLASH FLOOD WARNING FOR NORTHWESTERN CASS...SOUTHEASTERN
SAUNDERS AND NORTHEASTERN LANCASTER COUNTIES WILL EXPIRE AT 300 AM
CDT...

THE HEAVY RAIN HAS ENDED. FLOOD WATERS HAVE RECEDED. FLASH FLOODING
IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ANY
REMAINING ROAD CLOSURES.

LAT...LON 4106 9633 4103 9631 4102 9630 4101 9625
      4099 9623 4100 9616 4090 9622 4089 9646
      4107 9647

$$

MILLER

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 Omaha, NE wrote its last area forecast discussion before this flash flood warning went out at Aug 23, 11:44 PM CDT, 14 minutes earlier.

Area forecast discussion, Aug 23, 11:44 PM CDT, 14 minutes before

Area Forecast Discussion
National Weather Service Omaha/Valley NE
1144 PM CDT TUE AUG 23 2016

.SHORT TERM...(tonight through Friday)
Issued at 345 PM CDT TUE AUG 23 2016

Question whether thunderstorms will redevelop late this
afternoon/evening is initial concern...followed by pcpn chances in
the rest of the near term periods. Anticipated severe weather
threat not looking all that good at the moment. Recent sfc obs
reveal little in the way depicting a warm front upon which the
last several runs of the RAP13 has been advertising convection
would erupt. Current 88D mosaic is showing isolated cells over
nern KS and well as a few within our IA CWA...but it appears now
the threat for scattered TSRA development within the CWA has
diminished significantly with focus for convection more to the
north associated with potent vort max lifting into srn MN.
However...trend over the last hour has been CU field organizing
along with cluster of cells invof the srn CWA. Will therefore
focus evening POPs south...then the rest of tonight carry token
20s tonight with focus mainly over the ern CWA.

In regards to pcpn activity Wednesday afternoon/night...a cold front
dropping through the CWA will slow and become near stationary in the
vicinity of the srn CWA. Environment will be moisture rich during
this time...and with prolonged mid layer ageostrophic lift generous
rainfall accumulations could be realized along and south of I-80 by
events end early Thursday morning.

.LONG TERM...(Friday night through Tuesday)
Issued at 345 PM CDT TUE AUG 23 2016

Pcpn chances are pretty much in place through the majority of the
extended periods. Beginning Friday night a lifting warm front in
conjunction with llvl jet/strong theta-E advection is progged to
induce TSRA over the CWA. Passing vort max helps displace best
moisture/forcing just a bit to the east then on Saturday.
Thereafter...confidence pertaining to pcpn chance is low at best.
Therefore will maintain token POPs the remainder of the fcst pd.

&&

.AVIATION...(06Z TAFS for KOFK...KLNK and KOMA.)
Issued at 1140 PM CDT TUE AUG 23 2016

Lingering storms around KOMA and KLNK with MVFR cigs and vsby through
08z then becoming VFR as cold front pushes into the area through
12z. Front just past KOFK at 06z but weak push with light north to
northwest winds behind the front.

&&

.OAX Watches/Warnings/Advisories...
NE...None.
IA...None.
&&

SHORT TERM...DEE
LONG TERM...DEE
AVIATION...Fobert

Hazardous weather outlook, Aug 23, 4:46 PM CDT, 7 hours 12 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
446 PM CDT TUE AUG 23 2016

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-241200-
MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-
PAGE-KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-BOONE-MADISON-
STANTON-CUMING-BURT-PLATTE-COLFAX-DODGE-WASHINGTON-BUTLER-
SAUNDERS-DOUGLAS-SARPY-SEWARD-LANCASTER-CASS-OTOE-SALINE-
JEFFERSON-GAGE-JOHNSON-NEMAHA-PAWNEE-RICHARDSON-
446 PM CDT TUE AUG 23 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA...NORTHEAST
NEBRASKA AND SOUTHEAST NEBRASKA.

.DAY ONE...TONIGHT AND WEDNESDAY

ISOLATED TO SCATTERED THUNDERSTORM DEVELOPMENT IS POSSIBLE ACROSS
THE AREA LATE THIS AFTERNOON AND TONIGHT. THE MOST LIKELY TIME
FOR SEVERE WEATHER WILL BE THROUGH 10 PM. ANY SEVERE WEATHER IS
EXPECTED TO BE ISOLATED IN NATURE...WITH LARGE HAIL AND DAMAGING
WINDS THE MAIN THREAT. LOCALLY HEAVY RAINFALL IS POSSIBLE WITH ANY
SLOW MOVING THUNDERSTORM.

THERE WILL BE A SLIGHT RISK FOR SEVERE STORMS AGAIN ON WEDNESDAY
IN SOUTHEAST NEBRASKA AND SOUTHWEST IOWA AS A COLD FRONT STALLS
ACROSS NORTHERN MISSOURI INTO NORTHEAST KANSAS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY NIGHT THROUGH TUESDAY

THUNDERSTORM CHANCES RETURN FRIDAY INTO MONDAY WITH A GOOD CHANCE
FOR STORMS FRIDAY NIGHT AND SATURDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY NOT BE NEEDED TONIGHT.

FOBERT

In the hours before

Special weather statement, Aug 23, 10:34 PM CDT, 1 hour 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1034 PM CDT TUE AUG 23 2016

NEZ043-044-050-051-240400-
DODGE NE-COLFAX NE-BUTLER NE-SAUNDERS NE-
1034 PM CDT TUE AUG 23 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN BUTLER...
SOUTHWESTERN DODGE...SOUTHEASTERN COLFAX AND NORTHWESTERN SAUNDERS
COUNTIES UNTIL 1100 PM CDT...

AT 1034 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 5
MILES SOUTHEAST OF SCHUYLER...OR 20 MILES EAST OF COLUMBUS...MOVING
SOUTH AT 20 MPH.

NICKEL SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
SCHUYLER...NORTH BEND...MORSE BLUFF...BRUNO...ROGERS...LINWOOD...
ABIE AND 7 MILES NORTH OF NORTH BEND.

THIS INCLUDES HIGHWAY 30 IN NEBRASKA BETWEEN MILE MARKERS 396 AND
414.

LAT...LON 4143 9714 4163 9690 4157 9663 4124 9691
TIME...MOT...LOC 0334Z 342DEG 19KT 4141 9697

DEWALD

Local storm report, Aug 23, 10:37 PM CDT, 1 hour 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1037 PM CDT TUE AUG 23 2016

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

1010 PM     TSTM WND GST     5 NNW COUNCIL BLUFFS    41.30N 95.90W
08/23/2016  M65.00 MPH       DOUGLAS            NE   ASOS

&&

VDEWALD

Local storm report, Aug 23, 10:38 PM CDT, 1 hour 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1038 PM CDT TUE AUG 23 2016

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

1008 PM     TSTM WND GST     3 NNW COUNCIL BLUFFS    41.27N 95.88W
08/23/2016  M73 MPH          POTTAWATTAMIE      IA   TRAINED SPOTTER

            4 INCH DIAMETER TREES BLOWN DOWN.

&&

VDEWALD

Local storm report, Aug 23, 10:48 PM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1048 PM CDT TUE AUG 23 2016

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

1047 PM     FLOOD            2 E OMAHA               41.26N 95.98W
08/23/2016                   DOUGLAS            NE   BROADCAST MEDIA

            WATER OVER ROADWAY AT SADDLECREEK AND DAVENPORT.

&&

VDEWALD

Special weather statement, Aug 23, 11:08 PM CDT, 50 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1108 PM CDT TUE AUG 23 2016

IAZ069-079-080-090-091-NEZ051-053-066>068-240500-
FREMONT IA-PAGE IA-MILLS IA-POTTAWATTAMIE IA-MONTGOMERY IA-CASS NE-
LANCASTER NE-OTOE NE-SAUNDERS NE-SARPY NE-
1108 PM CDT TUE AUG 23 2016

...SIGNIFICANT WEATHER ADVISORY FOR MONTGOMERY...FREMONT...
NORTHWESTERN PAGE...MILLS...SOUTH CENTRAL POTTAWATTAMIE...CASS...
SOUTHERN SARPY...SOUTHEASTERN SAUNDERS...NORTHERN OTOE AND CENTRAL
LANCASTER COUNTIES UNTIL MIDNIGHT CDT...

AT 1107 PM CDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS
ALONG A LINE EXTENDING FROM 4 MILES NORTH OF RED OAK TO 7 MILES EAST
OF UNION TO 5 MILES NORTH OF HICKMAN. MOVEMENT WAS EAST SOUTHEAST AT
40 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
LINCOLN...BELLEVUE...NEBRASKA CITY...PLATTSMOUTH...RED OAK...
GLENWOOD...SHENANDOAH...WAVERLY...SYRACUSE...SPRINGFIELD...MALVERN...
SIDNEY...LOUISVILLE...WEEPING WATER...ESSEX...BENNET...STANTON...
ELMWOOD...GREENWOOD AND PALMYRA.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 2 IN NEBRASKA BETWEEN MILE MARKERS 466 AND 504...AND NEAR
MILE MARKER 508.
 HIGHWAY 34 IN IOWA BETWEEN MILE MARKERS 1 AND 42.
 HIGHWAY 59 IN IOWA BETWEEN MILE MARKERS 13 AND 37.
 HIGHWAY 75 IN NEBRASKA BETWEEN MILE MARKERS 51 AND 82.
 HIGHWAY 77 IN NEBRASKA BETWEEN MILEMARKERS 54 AND 71...AND NEAR
MILEMARKER 77.
 INTERSTATE 29 BETWEEN MILE MARKERS 7 AND 42.
 INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 395 AND 426.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH
FLOODED ROADWAYS.

&&

LAT...LON 4115 9492 4066 9547 4066 9684 4087 9680
      4117 9587
TIME...MOT...LOC 0407Z 291DEG 33KT 4108 9522 4085 9578 4071 9666

DEWALD

Local storm report, Aug 23, 11:30 PM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1130 PM CDT TUE AUG 23 2016

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

0930 PM     TSTM WND DMG     FREMONT                 41.44N 96.49W
08/23/2016                   DODGE              NE   STORM CHASER

            NUMEROUS LARGE TREES AND POWER LINES BLOWN DOWN.

&&

VDEWALD

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 23, 7:05 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Seward	40 min
Aug 23, 7:15 PM CDT	Severe Thunderstorm Warning	OAX	Douglas, Washington	45 min
Aug 23, 7:30 PM CDT	Special Weather Statement	OAX	Burt	45 min
Aug 23, 7:40 PM CDT	Severe Thunderstorm Warning	OAX	Washington	50 min
Aug 23, 7:50 PM CDT	Tornado Warning	OAX	Washington	25 min
Aug 23, 8:00 PM CDT	Flash Flood Warning	OAX	Washington	6 hr
Aug 23, 8:15 PM CDT	Severe Thunderstorm Warning	OAX	Washington	45 min
Aug 23, 8:21 PM CDT	Special Weather Statement	OAX	Dodge	39 min
Aug 23, 8:30 PM CDT	Severe Thunderstorm Warning	OAX	Dodge	21 min
Aug 23, 9:01 PM CDT	Severe Thunderstorm Warning	OAX	Washington	44 min
Aug 23, 9:12 PM CDT	Severe Thunderstorm Warning	OAX	Dodge, Washington	33 min
Aug 23, 9:21 PM CDT	Flash Flood Warning	OAX	Burt, Dodge, Washington	4 hr
Aug 23, 9:26 PM CDT	Special Weather Statement	OAX	Douglas	49 min
Aug 23, 9:45 PM CDT	Special Weather Statement	OAX	Douglas, Sarpy, Washington	45 min
Aug 23, 9:51 PM CDT	Areal Flood Advisory	OAX	Douglas, Washington	4 hr
Aug 23, 9:57 PM CDT	Special Weather Statement	OAX	Cuming	33 min
Aug 23, 10:01 PM CDT	Severe Thunderstorm Warning	OAX	Douglas, Sarpy, Washington	29 min
Aug 23, 10:34 PM CDT	Special Weather Statement	OAX	Colfax	26 min
Aug 23, 10:54 PM CDT	Areal Flood Advisory	OAX	Douglas	3 hr
Aug 23, 11:05 PM CDT	Areal Flood Advisory	OAX	Sarpy	3 hr
Aug 23, 11:08 PM CDT	Special Weather Statement	OAX	Cass, Lancaster	52 min
Aug 23, 11:23 PM CDT	Flash Flood Warning	OAX	Dodge, Douglas, Sarpy, Washington	3 hr
Aug 24, 12:03 AM CDT	Special Weather Statement	OAX	Cass, Lancaster, Otoe	42 min
Aug 24, 12:51 AM CDT	Special Weather Statement	OAX	Lancaster	24 min
Aug 24, 2:45 AM CDT	Areal Flood Warning	OAX	Douglas	6 hr
Aug 24, 4:00 AM CDT	Flash Flood Watch	OAX	Nemaha, Pawnee, Richardson	16 hr
Aug 24, 4:37 PM CDT	Special Weather Statement	OAX	Gage	23 min
Aug 24, 4:45 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Pawnee	45 min
Aug 24, 5:29 PM CDT	Special Weather Statement	OAX	Johnson	31 min
Aug 24, 5:45 PM CDT	Special Weather Statement	OAX	Nemaha	30 min
Aug 24, 5:48 PM CDT	Special Weather Statement	OAX	Pawnee	27 min
Aug 24, 6:09 PM CDT	Special Weather Statement	OAX	Nemaha	36 min
Aug 24, 6:51 PM CDT	Special Weather Statement	OAX	Richardson	9 min
Aug 24, 6:58 PM CDT	Severe Thunderstorm Warning	OAX	Richardson	32 min

Nearby

Flash Flood Warnings in Nebraska, 2016 Every flash flood 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.