Alert archive / Arkansas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 440, NWS Tulsa, OK

June 15, 2008Crawford County, Franklin County, Sebastian County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Jun 15, 2008, 11:11 PM CDT for Crawford County, Franklin County, Sebastian County, Arkansas. It was in force for 34 min. 7 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 15, 2008, 11:11 PM CDT (04:11 UTC)
Expired: Jun 15, 2008, 11:45 PM CDT
In force: 34 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Crawford County, AR, Franklin County, AR, Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 43 km from the middle of the area, began a volume at 03:58 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 15, 11:15 PM CDT	TSTM WND DMG	2 S Van Buren, AR	TREE DOWN ON I540
Jun 15, 11:19 PM CDT	TSTM WND DMG	Fort Smith, AR	POWER LINES DOWN...SPARKING OVER GAS METER...SMELL OF GAS
Jun 15, 11:21 PM CDT	TSTM WND GST 70	Fort Smith, AR
Jun 15, 11:23 PM CDT	TSTM WND DMG	Fort Smith, AR	TREE FELL THROUGH ROOF OF HOUSE INTO LIVING ROOM.
Jun 15, 11:26 PM CDT	TSTM WND DMG	Fort Smith, AR	SMALL HOUSE PICKED UP AND BLOWN ACROSS STREET IN NORTH FORT SMITH.
Jun 15, 11:30 PM CDT	TSTM WND DMG	Fort Smith, AR	UTILITY TRAILERS FROM HOME DEPOT BLOWN ONTO PHOENIX AVE., JUST NORTHWEST OF AIRPORT.
Jun 15, 11:45 PM CDT	TSTM WND DMG	Charleston, AR	TREES AND POWER LINES DOWN-MUCH OF CITY WITHOUT POWER

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 7 storm reports to this severe thunderstorm warning; the first came 4 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 15, 6:38 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 4.2 hours before the alert went out and 167 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: 426 J/kg
Mixed-layer CIN: -284 J/kg
Mixed-layer LCL: 1124 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 321 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KTSA 160412
SVRTSA
ARC033-047-131-160445-
/O.NEW.KTSA.SV.W.0440.080616T0411Z-080616T0445Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1111 PM CDT SUN JUN 15 2008

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CRAWFORD COUNTY IN NORTHWEST ARKANSAS
  FRANKLIN COUNTY IN WEST CENTRAL ARKANSAS
  NORTHERN SEBASTIAN COUNTY IN WEST CENTRAL ARKANSAS

* UNTIL 1145 PM CDT

* AT 1110 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL
  AND DESTRUCTIVE WINDS TO 80 MPH. THESE STORMS WERE LOCATED ALONG A
  LINE EXTENDING FROM CASS TO LAVACA TO FORT SMITH...MOVING SOUTHEAST
  AT 28 MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...CASS...
  BARLING...BONANZA...LAVACA...JENNY LIND...BLOOMER...CHARLESTON...
  OZARK...BRANCH...WIEDERKEHR VILLAGE...ALTUS AND DENNING.

PERSONS NEAR THE PATH OF THESE DANGEROUS STORMS SHOULD PREPARE FOR 
LARGE HAIL AND VIOLENT STRAIGHT LINE WINDS. THESE STORMS HAVE THE 
POTENTIAL TO CAUSE INJURY AND DAMAGE TO PROPERTY. IF NO UNDERGROUND 
SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN AN INTERIOR 
ROOM AND STAY AWAY FROM WINDOWS.

LAT...LON 3537 9371 3537 9374 3539 9379 3532 9380
      3531 9382 3531 9390 3529 9391 3522 9443
      3541 9443 3547 9423 3575 9388 3560 9369
      3542 9369
TIME...MOT...LOC 0411Z 321DEG 24KT 3567 9390 3539 9415
          3532 9440

$$

2 follow-up statements

000 
WWUS54 KTSA 160435
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1133 PM CDT SUN JUN 15 2008

ARC033-047-131-160445-
/O.CON.KTSA.SV.W.0440.000000T0000Z-080616T0445Z/
SEBASTIAN AR-CRAWFORD AR-FRANKLIN AR-
1133 PM CDT SUN JUN 15 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR SOUTHERN FRANKLIN...SOUTHERN CRAWFORD AND NORTHERN SEBASTIAN
COUNTIES...

AT 1131 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY
SIZE HAIL AND DESTRUCTIVE WINDS TO 80 MPH. THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM CECIL TO CHARLESTON TO JENNY LIND TO
BONANZA...MOVING SOUTHEAST AT 28 MPH.

A SMALL HOME WAS REPORTED SERIOUSLY DAMAGED IN FORT SMITH WITH 
MEASURED WINDS TO 70 MPH THERE.  

SOME LOCATIONS AHEAD OF THIS LINE OF STORMS INCLUDE...OZARK...PETER 
PENDER...BRANCH...WIEDERKEHR VILLAGE...MEG...ALTUS...DENNING AND 
ALIX.  PERSONS IN THESE AREAS SHOULD SEEK SHELTER IMMEDIATELY INSIDE 
A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

LAT...LON 3537 9372 3539 9380 3532 9380 3531 9382
      3531 9391 3529 9391 3522 9443 3541 9443
      3545 9420 3560 9402 3560 9369 3542 9369
TIME...MOT...LOC 0433Z 321DEG 24KT 3545 9392 3528 9404
          3520 9423 3522 9442

$$

000 
WWUS54 KTSA 160443
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1141 PM CDT SUN JUN 15 2008

ARC033-160451-
/O.CAN.KTSA.SV.W.0440.000000T0000Z-080616T0445Z/
CRAWFORD AR-
1141 PM CDT SUN JUN 15 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CRAWFORD COUNTY
IS CANCELLED...

THE MOST INTENSE PORTIONS OF THE SEVERE THUDNERSTORMS HAVE MOVED OUT 
OF CRAWFORD COUNTY.

LAT...LON 3537 9372 3539 9380 3532 9380 3531 9382
      3531 9391 3530 9390 3529 9391 3522 9443
      3534 9443 3536 9430 3535 9427 3537 9417
      3555 9392 3542 9369
TIME...MOT...LOC 0441Z 321DEG 24KT 3541 9388 3523 9400
          3516 9419 3518 9438

$$

ARC047-131-160445-
/O.CON.KTSA.SV.W.0440.000000T0000Z-080616T0445Z/
SEBASTIAN AR-FRANKLIN AR-
1141 PM CDT SUN JUN 15 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR SOUTHERN FRANKLIN AND NORTHERN SEBASTIAN COUNTIES...

AT 1139 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY
SIZE HAIL AND DAMAGING WINDS TO 70 MPH. THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM MEG TO CHARLESTON TO 9 MILES SOUTHEAST OF
JENNY LIND TO BONANZA...MOVING SOUTHEAST AT 28 MPH.

SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...ALTUS...DENNING
AND ALIX.

THIS IS A DANGEROUS STORM THAT HAS A HISTORY OF PRODUCING DAMAGING
WINDS. SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS.

WINDS TO 50 MPH WERE REPORTED IN CHARLESTON BY THE FRANKLIN COUNTY 
OFFICE OF EMERGENCY MANAGEMENT.


LAT...LON 3537 9372 3539 9380 3532 9380 3531 9382
      3531 9391 3530 9390 3529 9391 3522 9443
      3534 9443 3536 9430 3535 9427 3537 9417
      3555 9392 3542 9369
TIME...MOT...LOC 0441Z 321DEG 24KT 3541 9388 3523 9400
          3516 9419 3518 9438

$$

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 Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 15, 9:02 PM CDT, 2 hours 9 minutes earlier.

Area forecast discussion, Jun 15, 9:02 PM CDT, 2 hours 9 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
902 PM CDT SUN JUN 15 2008

.DISCUSSION...
STRONG TO SEVERE THUNDERSTORMS HAVE DEVELOPED ALONG AN
OUTFLOW BOUNDARY ASSOCIATED WITH THE THUNDERSTORM
COMPLEX THAT ROLLED ACROSS PORTIONS OF MISSOURI
EARLIER TODAY. THIS BOUNDARY EXTENDS ACROSS NORTHERN
ARKANSAS ACROSS EXTREME NORTHEAST OKLAHOMA AND INTO
SOUTHEASTERN KANSAS. THESE THUNDERSTORMS WILL CONTINUE
TO MOVE TO THE SOUTH INTO THE MORE FAVORABLE AIRMASS.
LARGE HAIL AND WIND GUSTS TO AROUND 70 MPH WILL BE
POSSIBLE THESE STORMS.

ADDITIONAL THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS
SOUTHERN KANSAS AND NORTHERN OKLAHOMA TONIGHT AS THE LOW
LEVEL JET INCREASES TO NEAR 45 KNOTS. THESE THUNDERSTORMS
ARE EXPECTED TO FORM INTO A THUNDERSTORM COMPLEX AND MOVE
ACROSS THE AREA AS WELL. LARGE HAIL AND GUSTY WINDS WILL ALSO
BE A CONCERN WITH THESE STORMS.

HEAVY RAIN IS ALSO ANTICIPATED WITH 2 TO 4 INCHES OF
RAIN POSSIBLE ACROSS PORTIONS OF EASTERN OKLAHOMA
AND NORTHWEST ARKANSAS.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   67  86  66  83 /  80  50  30  50
FSM   68  88  66  85 /  90  40  40  50
MLC   69  89  68  84 /  40  30  40  40
BVO   66  84  63  83 /  90  50  30  50
FYV   64  82  60  80 /  90  50  40  40
BYV   63  80  60  79 /  90  50  40  20
MKO   68  87  66  82 /  70  40  30  50
MIO   64  82  61  81 /  90  50  20  30
F10   68  88  67  82 /  60  40  40  50
HHW   71  91  69  86 /  30  30  30  40

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...FLASH FLOOD WATCH UNTIL 7 AM MONDAY FOR OKZ054-OKZ055-OKZ056-
     OKZ057-OKZ058-OKZ059-OKZ060-OKZ061-OKZ062-OKZ063-OKZ064-
     OKZ066-OKZ067-OKZ068-OKZ069-OKZ070-OKZ072.

AR...FLASH FLOOD WATCH UNTIL 7 AM MONDAY FOR ARZ001-ARZ002-ARZ010-
     ARZ011-ARZ019-ARZ020-ARZ029.

&&

SHORT TERM...12
LONG TERM....10

In the hours before

Special weather statement, Jun 15, 8:49 PM CDT, 2 hours 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
849 PM CDT SUN JUN 15 2008

ARZ001-002-010-011-160245-
BENTON AR-CARROLL AR-MADISON AR-WASHINGTON AR-
849 PM CDT SUN JUN 15 2008

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 945 PM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     NORTHEASTERN WASHINGTON...SOUTHEASTERN CARROLL...SOUTHERN BENTON
     AND CENTRAL MADISON

AT 849 PM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 3 MILES NORTHEAST OF DELMAR TO 4 MILES WEST OF
KINGSTON TO 4 MILES NORTHEAST OF SONORA TO 4 MILES WEST OF VAUGHN...
MOVING SOUTH AT 18 MPH. SOME LOCATIONS THAT WILL BE AFFECTED BY THESE
STORMS INCLUDE...

THESE STORMS WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS
TO 40 MPH. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE
SIGNIFICANT WEATHER ALERT IS UPGRADED TO A WARNING.

LAT...LON 3612 9346 3609 9346 3608 9343 3597 9344
      3595 9348 3583 9352 3582 9353 3595 9393
      3620 9450 3642 9450 3615 9361 3626 9329
      3613 9328
TIME...MOT...LOC 0149Z 350DEG 16KT 3618 9332 3606 9359
          3619 9398 3632 9436

Special weather statement, Jun 15, 9:10 PM CDT, 2 hours 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
910 PM CDT SUN JUN 15 2008

OKZ062-160245-
MAYES OK-
910 PM CDT SUN JUN 15 2008

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 945 PM CDT
FOR THE FOLLOWING COUNTY...

IN NORTHEAST OKLAHOMA
     MAYES

AT 910 PM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORM OUTLFOW
WINDS ALONG A LINE EXTENDING FROM 10 MILES NORTHWEST OF PRYOR TO 2
MILES SOUTH OF SALINA...MOVING SOUTH AT 20 MPH.  WINDS WILL GUST TO
NEAR 40 MPH AS THIS OUTFLOW MOVES THROUGH AN AREA.

SOME LOCATIONS THAT WILL BE AFFECTED
INCLUDE...PRYOR...MURPHY...CHOUTEAU...LOCUST GROVE AND SALINA.

LAT...LON 3625 9503 3617 9510 3617 9511 3615 9511
      3608 9517 3608 9519 3624 9544 3626 9544
      3626 9543 3648 9543 3650 9542
TIME...MOT...LOC 0210Z 019DEG 17KT 3640 9543 3625 9516

Local storm report, Jun 15, 9:50 PM CDT, 1 hour 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
950 PM CDT SUN JUN 15 2008

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

0930 PM     TSTM WND GST     WESTVILLE               35.99N 94.57W
06/15/2008  M57 MPH          ADAIR              OK   TRAINED SPOTTER

&&

PBS

Special weather statement, Jun 15, 10:39 PM CDT, 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1039 PM CDT SUN JUN 15 2008

OKZ068>070-072-076-160445-
ADAIR OK-CHEROKEE OK-LE FLORE OK-MUSKOGEE OK-SEQUOYAH OK-
1039 PM CDT SUN JUN 15 2008

...SIGNIFICANT WEATHER ALERT...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 1145 PM CDT
FOR THE FOLLOWING COUNTIES...

IN EAST CENTRAL OKLAHOMA
     NORTHEASTERN MUSKOGEE...CHEROKEE AND WESTERN SEQUOYAH

IN NORTHEAST OKLAHOMA
     SOUTHERN ADAIR

IN SOUTHEAST OKLAHOMA
     NORTHERN LE FLORE

AT 1039 PM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A
LINE EXTENDING FROM 6 MILES NORTHWEST OF LOST CITY TO 7 MILES
NORTHEAST OF COOKSON TO 12 MILES NORTHEAST OF BRUSHY...MOVING SOUTH
AT 23 MPH. SOME LOCATIONS THAT WILL BE AFFECTED BY THESE STORMS
INCLUDE...PUMPKIN CENTER...BUNCH...SALLISAW...GANS...MC KEY...VIAN...
BRUSHY...MARBLE CITY...BOX...TAHLEQUAH...COOKSON...HULBERT...LOST
CITY AND BRAGGS.

THESE STORMS WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS
TO 50 MPH. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE
SIGNIFICANT WEATHER ALERT IS UPGRADED TO A WARNING.

LAT...LON 3591 9484 3565 9447 3564 9448 3563 9471
      3525 9459 3542 9492 3562 9520 3602 9524
      3604 9523 3605 9521 3608 9520 3608 9514
TIME...MOT...LOC 0339Z 004DEG 20KT 3604 9520 3578 9487
          3563 9455

Local storm report, Jun 15, 11:01 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1101 PM CDT SUN JUN 15 2008

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

1100 PM     TSTM WND DMG     VAN BUREN               35.44N 94.35W
06/15/2008                   CRAWFORD           AR   BROADCAST MEDIA

            MULTIPLE TREES DOWN

&&

PBS

Local storm report, Jun 15, 11:09 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1109 PM CDT SUN JUN 15 2008

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

1108 PM     TSTM WND GST     FORT SMITH              35.39N 94.40W
06/15/2008  E60 MPH          SEBASTIAN          AR   EMERGENCY MNGR

&&

PBS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 7:10 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	65 min
Jun 15, 7:27 PM CDT	Special Weather Statement	TSA	Carroll	33 min
Jun 15, 7:32 PM CDT	Special Weather Statement	TSA	Benton	28 min
Jun 15, 7:40 PM CDT	Severe Thunderstorm Warning	TSA	Benton	80 min
Jun 15, 8:04 PM CDT	Severe Thunderstorm Warning	TSA	Carroll, Madison	41 min
Jun 15, 8:14 PM CDT	Special Weather Statement	TSA	Carroll	31 min
Jun 15, 8:49 PM CDT	Special Weather Statement	TSA	Benton, Madison	56 min
Jun 15, 8:52 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	53 min
Jun 15, 8:59 PM CDT	Severe Thunderstorm Warning	TSA	Madison	38 min
Jun 15, 9:07 PM CDT	Severe Thunderstorm Warning	TSA	Madison, Washington	38 min
Jun 15, 9:34 PM CDT	Severe Thunderstorm Warning	TSA	Washington	41 min
Jun 15, 9:51 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Washington	54 min
Jun 15, 10:08 PM CDT	Severe Thunderstorm Warning	TSA	Washington	37 min
Jun 15, 10:29 PM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	46 min
Jun 15, 10:54 PM CDT	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	66 min
Jun 15, 11:54 PM CDT	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	66 min
Jun 16, 12:20 AM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Sebastian	3 hr
Jun 16, 12:58 AM CDT	Special Weather Statement	TSA	Polk	47 min
Jun 16, 8:55 AM CDT	River Flood Warning	TSA	Crawford, Sebastian	48 hr

Nearby

Severe Thunderstorm Warnings in Arkansas, 2008 Every severe thunderstorm warning in 2008

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.