Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 236, NWS Tulsa, OK

May 11, 2017Craig County, Nowata County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 11, 2017, 2:41 PM CDT for Craig County, Nowata County, Oklahoma. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 11, 2017, 2:41 PM CDT (19:41 UTC)
Expired: May 11, 2017, 3:15 PM CDT
In force: 34 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Craig County, OK, Nowata County, OK

The radar

The Tulsa radar (KINX), 87 km from the middle of the area, began a volume at 19:43 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 severe thunderstorm 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 11, 12:56 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 7.7 hours before the alert went out and 125 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1011 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

409 
WUUS54 KTSA 111941
SVRTSA
OKC035-105-112015-
/O.NEW.KTSA.SV.W.0236.170511T1941Z-170511T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
241 PM CDT THU MAY 11 2017

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Northern Craig County in northeastern Oklahoma...
  Nowata County in northeastern Oklahoma...

* Until 315 PM CDT

* At 240 PM CDT, severe thunderstorms were located along a line
  extending from near Watova to 2 miles northwest of White Oak,
  moving northeast at 35 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations in or near the path include...
  Nowata...                         South Coffeyville...
  Welch...                          Delaware...
  Lenapah...                        Watova...
  Hollow...                         Pyramid Corners...
  Centralia...                      Centrailia...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3699 9504 3698 9503 3697 9504 3697 9503
      3663 9523 3661 9573 3699 9571 3700 9501
TIME...MOT...LOC 1940Z 215DEG 30KT 3663 9567 3664 9530 

HAIL...1.00IN
WIND...60MPH
 
$$

1 follow-up statement

222 
WWUS54 KTSA 111959
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
259 PM CDT THU MAY 11 2017

OKC035-105-112015-
/O.CON.KTSA.SV.W.0236.000000T0000Z-170511T2015Z/
Craig OK-Nowata OK-
259 PM CDT THU MAY 11 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM CDT
FOR NORTHERN CRAIG AND NORTHERN NOWATA COUNTIES...

At 259 PM CDT, severe thunderstorms were located along a line
extending from 4 miles east of Delaware to 6 miles west of
Bluejacket, moving northeast at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations in or near the path include...
South Coffeyville...              Welch...
Delaware...                       Lenapah...
Hollow...                         Pyramid Corners...
Centralia...                      Centrailia...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3699 9504 3698 9503 3697 9504 3697 9503
      3673 9517 3674 9572 3699 9571 3700 9501
TIME...MOT...LOC 1959Z 215DEG 30KT 3676 9556 3677 9519 

HAIL...1.00IN
WIND...60MPH
 
$$

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 May 11, 2:22 PM CDT, 19 minutes earlier.

Area forecast discussion, May 11, 2:22 PM CDT, 19 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
222 PM CDT Thu May 11 2017

.DISCUSSION...
Main forecast concern is the ongoing severe thunderstorm and heavy
rain potential across much of eastern Oklahoma and western
Arkansas.

Widespread thunderstorm development continues across eastern and
northern Oklahoma early this afternoon and will continue into at
least early to mid evening as the upper low in northwest Oklahoma
approaches and eventually moves overhead. The strongest storms
this afternoon and early evening should be north of Interstate 40,
where the greatest instabilities are located. This area will also
be beneath the track of the upper low and the coldest temperatures
aloft. Very large hail, potentially to baseball size, will be the
primary severe weather threat, in addition to damaging winds.
However, a very localized tornado threat will also continue near
and just north of Interstate 44 as a result of a lingering
boundary, a scenario supported by local model data.

In addition to the severe weather threat, locally heavy rainfall
from the strongest thunderstorms could cause flash flooding,
especially in parts of northeast Oklahoma that saw a lot of rain
last night and early this morning. The Flash Flood Watch will
continue through mid evening.

Additional thunderstorms may redevelop farther south into
southeast Oklahoma during the mid to late evening hours, which
would continue to have a severe potential, albeit lesser than the
storms to the north. Showers will continue into the day on
Friday, especially across far eastern Oklahoma and western
Arkansas, with a clearing from west to east through the day.

Cooler temperatures will follow the upper low and attendant cold
front for Friday and even into Saturday, before southerly winds
and above normal temperatures make a return on Sunday. Warm and
dry weather will persist into early next week, with low
thunderstorm chances returning toward the middle part of the week.
The next best chance of thunderstorms, including some severe
weather potential, should hold off until the Thursday-Friday time
frame.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   60  75  51  79 /  80  20   0   0
FSM   62  75  53  80 /  80  50   0   0
MLC   60  73  52  79 /  60  20   0   0
BVO   58  74  46  79 /  80  10   0   0
FYV   58  71  46  76 /  80  50   0   0
BYV   58  70  49  76 /  80  50   0   0
MKO   59  73  51  79 /  70  30   0   0
MIO   59  73  49  78 /  80  20   0   0
F10   59  73  51  78 /  60  20   0   0
HHW   61  74  54  80 /  60  10   0   0

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...Flash Flood Watch until 10 PM CDT this evening for OKZ054>063-
     067>069.

AR...Flash Flood Watch until 10 PM CDT this evening for ARZ001-002-
     010-011.

&&

LONG TERM....22

Hazardous weather outlook, May 11, 1:19 PM CDT, 1 hour 22 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
119 PM CDT Thu May 11 2017

ARZ001-002-010-011-019-020-029-OKZ049-053>076-121015-
Adair OK-Benton AR-Carroll AR-Cherokee OK-Choctaw OK-Craig OK-
Crawford AR-Creek OK-Delaware OK-Franklin AR-Haskell OK-Latimer OK-
Le Flore OK-Madison AR-Mayes OK-McIntosh OK-Muskogee OK-Nowata OK-
Okfuskee OK-Okmulgee OK-Osage OK-Ottawa OK-Pawnee OK-Pittsburg OK-
Pushmataha OK-Rogers OK-Sebastian AR-Sequoyah OK-Tulsa OK-Wagoner OK-
Washington OK-Washington AR-
119 PM CDT Thu May 11 2017

...Severe weather expected this afternoon with very large hail and
   damaging winds likely...

...Flash flood watch in effect for NE OK/NW AR through 10 PM...

This Outlook is for Northwest and West Central Arkansas as well as
much of Eastern Oklahoma.

.DAY ONE...This afternoon and tonight.

TORNADO.
     RISK...Limited to elevated.
     AREA...Northeastern Oklahoma.
     ONSET...early to mid afternoon.

SEVERE THUNDERSTORM.
	RISK...Critical.
	AREA...Eastern Oklahoma and Northwest Arkansas.
	ONSET...early to mid afternoon.

	AREA AT GREATEST RISK...Northeast Oklahoma and northwest
    Arkansas.

HEAVY RAIN.
	RISK...Elevated.
	AREA...Eastern Oklahoma and northwest Arkansas.
	ONSET...This afternoon through the evening hours.

FLASH FLOOD.
	RISK...Limited.
	AREA...Northeast Oklahoma and northwest Arkansas.
	ONSET...This Afternoon through the evening hours.

DISCUSSION...Strong to severe thunderstorms are expected to rapidly
develop this afternoon across much of eastern Oklahoma and northwest
Arkansas. Very large hail to the size of baseballs and damaging
winds will be possible, especially with any supercells that
initially develop. Although low level winds are expected to remain
light, a limited to elevated tornado threat will exists over
portions of northeast Oklahoma near a stationary boundary located
just north of I-44.  Given the very unstable air-mass in place, any
deviant storm motions could locally enhance low level storm rotation.

Additionally...soils remain saturated across much of northeast
Oklahoma from recent rainfall. Locally heavy rain will be likely in
the stronger storms this afternoon into the evening hours. 1 to 3
inches of rainfall is expected and locally 4 inches possible. Any
additional rainfall will likely lead to excessive runoff.

The risk for severe weather will diminish by mid to late evening as
the front begins to shift east. A few thunderstorms could persist
into the overnight hours...especially across northeast Oklahoma and
northwest Arkansas before the upper low clears the area.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Activation of the Regional Spotter Network Likely.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.
FRIDAY Through MONDAY...No Hazards.
TUESDAY and WEDNESDAY...Thunderstorm Potential.

EXTENDED DISCUSSION... Cooler and settled conditions will settle
across the area from west to east on Friday. Warmer temperatures are
expected through the weekend and will continue into at least the
first part of next week. Thunderstorm chances will be on the
increase once again in the Tuesday and Wednesday as an upper system
to the northwest begins to impact the region.

weather.gov/tulsa Contains additional information.

In the hours before

Local storm report, May 11, 1:57 PM CDT, 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
157 PM CDT THU MAY 11 2017

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

0156 PM     HAIL             3 NW BROKEN ARROW       36.08N 95.83W
05/11/2017  E1.00 INCH       TULSA              OK   NWS EMPLOYEE

            NICKEL TO QUARTER SIZED HAIL ON THE BROKEN ARROW
            EXPRESSWAY AT 129TH EAST AVENUE.

&&

KAH

Local storm report, May 11, 1:59 PM CDT, 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
159 PM CDT THU MAY 11 2017

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

0159 PM     HAIL             2 SSE CATOOSA           36.16N 95.73W
05/11/2017  E0.88 INCH       WAGONER            OK   EMERGENCY MNGR

            AT INTERSTATE 44 AND HIGHWAY 412.

&&

KAH

Local storm report, May 11, 2:04 PM CDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
204 PM CDT THU MAY 11 2017

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

0200 PM     HAIL             2 S CATOOSA             36.16N 95.75W
05/11/2017  E1.75 INCH       WAGONER            OK   NWS EMPLOYEE

&&

KAH

Special weather statement, May 11, 2:19 PM CDT, 22 minutes before

Special Weather Statement
National Weather Service Tulsa OK
219 PM CDT THU MAY 11 2017

OKZ057-058-063-111945-
Craig OK-Delaware OK-Ottawa OK-
219 PM CDT THU MAY 11 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CRAIG...NORTHWESTERN
DELAWARE AND SOUTHWESTERN OTTAWA COUNTIES UNTIL 245 PM CDT...

At 219 PM CDT, a strong thunderstorm was located 4 miles northwest of
Ketchum, moving northeast at 20 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations in or near the path include...
Vinita...                         Fairland...
Afton...                          Bernice...
Ketchum...                        Bluejacket...
Disney...                         Cleora...
Narcissa...                       Bernice State Park...

This includes Interstate 44 between mile markers 283 and 304.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A severe thunderstorm watch remains in effect until 900 PM CDT for
northeastern Oklahoma.

LAT...LON 3677 9475 3647 9499 3648 9501 3651 9501
      3651 9508 3656 9519 3689 9505
TIME...MOT...LOC 1919Z 213DEG 16KT 3659 9506

Special weather statement, May 11, 2:31 PM CDT, 10 minutes before

Special Weather Statement
National Weather Service Tulsa OK
231 PM CDT THU MAY 11 2017

OKZ049-073-075-112000-
Pittsburg OK-Latimer OK-Pushmataha OK-
231 PM CDT THU MAY 11 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL PUSHMATAHA...
WESTERN LATIMER AND SOUTHEASTERN PITTSBURG COUNTIES UNTIL 300 PM
CDT...

At 231 PM CDT, a strong thunderstorm was located 9 miles northwest of
Stanley, moving northeast at 40 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations in or near the path include...
Wilburton...                      Damon...
Higgins...                        Yanush...
Sardis...

A severe thunderstorm watch remains in effect until 900 PM CDT for
southeastern Oklahoma.

LAT...LON 3454 9555 3468 9568 3498 9528 3476 9508
TIME...MOT...LOC 1931Z 233DEG 33KT 3466 9555

Local storm report, May 11, 2:32 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
232 PM CDT THU MAY 11 2017

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

0230 PM     HAIL             OWASSO                  36.27N 95.85W
05/11/2017  E1.00 INCH       TULSA              OK   NWS EMPLOYEE

&&

JDS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 9:31 PM CDT	Special Weather Statement	TSA	Creek, Pawnee	44 min
May 10, 9:41 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Pawnee	34 min
May 10, 10:07 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Tulsa	38 min
May 10, 10:33 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Rogers, Tulsa, Washington	42 min
May 10, 10:43 PM CDT	Special Weather Statement	TSA	Tulsa, Wagoner	47 min
May 10, 11:06 PM CDT	Special Weather Statement	TSA	Mayes, Nowata, Rogers, Washington	39 min
May 10, 11:11 PM CDT	Special Weather Statement	TSA	Wagoner	34 min
May 10, 11:15 PM CDT	Special Weather Statement	TSA	Craig	30 min
May 10, 11:36 PM CDT	Special Weather Statement	TSA	Craig, Ottawa	39 min
May 10, 11:38 PM CDT	Special Weather Statement	TSA	Delaware, Mayes	52 min
May 10, 11:55 PM CDT	Severe Thunderstorm Warning	TSA	Delaware	35 min
May 10, 11:59 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	46 min
May 11, 6:28 AM CDT	Special Weather Statement	TSA	Tulsa	32 min
May 11, 6:50 AM CDT	Special Weather Statement	TSA	Tulsa	25 min
May 11, 7:18 AM CDT	Special Weather Statement	TSA	Washington	27 min
May 11, 7:33 AM CDT	Special Weather Statement	TSA	Rogers	27 min
May 11, 7:42 AM CDT	Special Weather Statement	TSA	Washington	33 min
May 11, 7:53 AM CDT	Special Weather Statement	TSA	Mayes	37 min
May 11, 8:19 AM CDT	Special Weather Statement	TSA	Delaware	26 min
May 11, 8:27 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	48 min
May 11, 10:53 AM CDT	Flash Flood Watch	TSA	Adair, Cherokee, Craig, Delaware, Mayes, Nowata and 6 more	11 hr
May 11, 1:02 PM CDT	Special Weather Statement	TSA	Muskogee	28 min
May 11, 1:10 PM CDT	Special Weather Statement	TSA	Okfuskee	35 min
May 11, 1:17 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee	28 min
May 11, 1:34 PM CDT	Special Weather Statement	TSA	Tulsa	26 min
May 11, 1:43 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee, Rogers, Tulsa, Wagoner	47 min
May 11, 1:52 PM CDT	Areal Flood Advisory	TSA	Creek, Muskogee, Okmulgee, Osage, Rogers, Tulsa and 1 more	113 min
May 11, 1:53 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	52 min
May 11, 2:02 PM CDT	Tornado Warning	TSA	Rogers	28 min
May 11, 2:11 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	34 min
May 11, 2:19 PM CDT	Special Weather Statement	TSA	Craig	26 min
May 11, 2:24 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	36 min
May 11, 2:28 PM CDT	River Flood Warning	TSA	Ottawa	3 days
May 11, 2:29 PM CDT	Tornado Warning	TSA	Rogers	15 min
May 11, 2:31 PM CDT	Special Weather Statement	TSA	Latimer	29 min
May 11, 2:33 PM CDT	Areal Flood Advisory	TSA	Craig, Delaware, Mayes, Nowata, Ottawa, Rogers and 1 more	57 min
May 11, 2:52 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	38 min
May 11, 2:57 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	13 min
May 11, 2:58 PM CDT	Special Weather Statement	TSA	LeFlore	32 min
May 11, 3:17 PM CDT	Flash Flood Warning	TSA	Craig, Delaware, Nowata, Ottawa, Rogers	4 hr
May 11, 3:20 PM CDT	Special Weather Statement	TSA	LeFlore	25 min
May 11, 3:22 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	53 min
May 11, 3:38 PM CDT	Severe Thunderstorm Warning	TSA	Osage	52 min
May 11, 3:50 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee	40 min
May 11, 4:16 PM CDT	Severe Thunderstorm Warning	TSA	Osage	44 min
May 11, 4:22 PM CDT	Severe Thunderstorm Warning	TSA	Osage	23 min
May 11, 4:25 PM CDT	Areal Flood Advisory	TSA	Osage, Pawnee	3 hr
May 11, 4:25 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Tulsa	50 min
May 11, 4:31 PM CDT	Tornado Warning	TSA	Osage	29 min
May 11, 4:33 PM CDT	Tornado Warning	TSA	Osage	27 min
May 11, 4:46 PM CDT	Tornado Warning	TSA	Osage, Washington	29 min
May 11, 4:52 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	38 min
May 11, 5:05 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Mayes, Okmulgee, Osage, Rogers, Tulsa and 2 more	40 min
May 11, 5:06 PM CDT	Tornado Warning	TSA	Nowata, Rogers, Washington	24 min
May 11, 5:24 PM CDT	Tornado Warning	TSA	Nowata, Rogers, Washington	18 min
May 11, 5:42 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers, Tulsa	48 min
May 11, 5:52 PM CDT	Tornado Warning	TSA	Rogers	23 min
May 11, 6:04 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa, Wagoner	41 min
May 11, 6:10 PM CDT	Tornado Warning	TSA	Mayes, Rogers	16 min
May 11, 6:24 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee, Wagoner	51 min
May 11, 6:30 PM CDT	Special Weather Statement	TSA	Mayes	45 min
May 11, 6:32 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes	28 min
May 11, 6:53 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Ottawa	52 min
May 11, 6:55 PM CDT	Special Weather Statement	TSA	Muskogee	35 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2017 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.