Alert archive / Arkansas / Special Weather Statements in 2017
Special Weather Statement, NWS Tulsa, OK
NWS Tulsa, OK issued this special weather statement at Dec 4, 2017, 7:01 PM CST for Sebastian County, Arkansas. It was in force for 29 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
- Dec 4, 2017, 7:01 PM CST (01:01 UTC)
- Expired
- Dec 4, 2017, 7:30 PM CST
- In force
- 29 min
- Issued by
- NWS Tulsa, OK
County Sebastian County, AR
The radar
The Western Arkansas radar (KSRX), 34 km from the middle of the area, began a volume at 01:04 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.
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 1.0 hours before the alert went out and 218 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
- 507 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 845 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 342 m²/s²
- 0-3 km storm-relative helicity
- 415 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 4.5
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Dec 4, 5:36 PM CST, 1 hour 25 minutes earlier.
Area forecast discussion, Dec 4, 5:36 PM CST, 1 hour 25 minutes before
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</html>Hazardous weather outlook, Dec 4, 4:45 PM CST, 2 hours 16 minutes before
Hazardous Weather Outlook National Weather Service Tulsa OK 445 PM CST Mon Dec 4 2017 ARZ001-002-010-011-019-020-029-OKZ049-053>076-051115- 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- 445 PM CST Mon Dec 4 2017 |SEVERE STORMS POSSIBLE THIS EVENING| This Outlook is for Northwest and West Central Arkansas as well as much of Eastern Oklahoma. .DAY ONE...Today and Tonight. SEVERE THUNDERSTORM. RISK...Limited. AREA...East of U.S, Highway 69. ONSET...Ongoing. SIGNIFICANT WINDS. RISK...Limited. AREA...Eastern Oklahoma and western Arkansas. ONSET...Ongoing. FIRE WEATHER DANGER. RISK...Limited. AREA...West of U.S. Highway 69. ONSET...Ongoing. DISCUSSION... Thunderstorms have developed along a Cold front and dry line that continues to push across eastern Oklahoma. As the front overtakes the dry line and continues to move east it will encounter a moderately unstable but strongly sheared environment, with thunderstorm coverage increasing during the late afternoon and evening. A few supercell structures will be possible into the early evening before storms become more linear along the front. While damaging straight-line winds are the main hazard, the wind shear in the lowest levels supports a very small tornado threat during the late afternoon. The storms will quickly move east with the threat of severe weather ending before 9 PM. Strong and gusty south winds ahead of the front will shift to the west and northwest, with gusts of 30 to 35 mph remaining possible this evening. As drier air pushes east, there will be a period of limited fire spread potential across parts of eastern Oklahoma through early this evening. SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT... Local Spotter Activation May Be Needed. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. TUESDAY through SUNDAY...No Hazards. EXTENDED DISCUSSION... Noticeably colder temperatures will follow the cold front and prevail for the remainder of the week. A secondary cold front will arrive later in the week keeping temperatures below normal into next weekend. weather.gov/tulsa contains additional information.
In the hours before
Special weather statement, Dec 4, 5:23 PM CST, 1 hour 38 minutes before
Special Weather Statement
National Weather Service Tulsa OK
523 PM CST MON DEC 4 2017
OKZ073-075-050000-
Pittsburg OK-Latimer OK-
523 PM CST MON DEC 4 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN LATIMER AND EAST
CENTRAL PITTSBURG COUNTIES UNTIL 600 PM CST...
At 523 PM CST, a strong thunderstorm was located near Hartshorne,
moving east at 30 mph.
Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.
Locations in or near the path include...
Wilburton... Hartshorne...
Damon... Robbers Cave State Park...
Haileyville... Gowen...
Panola...
A severe thunderstorm watch remains in effect until 900 PM CST for
southeastern Oklahoma.
LAT...LON 3481 9556 3495 9560 3506 9531 3506 9520
3483 9512
TIME...MOT...LOC 2323Z 257DEG 24KT 3487 9553Special weather statement, Dec 4, 5:26 PM CST, 1 hour 35 minutes before
Special Weather Statement National Weather Service Tulsa OK 526 PM CST MON DEC 4 2017 ARZ010-019-OKZ069-072-050015- Washington AR-Crawford AR-Adair OK-Sequoyah OK- 526 PM CST MON DEC 4 2017 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CRAWFORD...SOUTH CENTRAL WASHINGTON...NORTHEASTERN SEQUOYAH AND SOUTHEASTERN ADAIR COUNTIES UNTIL 615 PM CST... At 526 PM CST, a strong thunderstorm was located 8 miles northwest of Short, moving east at 35 mph. Dime size hail and winds in excess of 40 mph will be possible with this storm. Locations in or near the path include... Cedarville... Mountainburg... Natural Dam... Chester... Lee Creek... Devils Den State Park... Short... Uniontown... Odell... This includes Interstate 49 between mile markers 26 and 44. A severe thunderstorm watch remains in effect until 900 PM CST for northwestern Arkansas...and northeastern and east central Oklahoma. LAT...LON 3557 9469 3572 9471 3582 9417 3556 9415 TIME...MOT...LOC 2326Z 262DEG 30KT 3565 9461
Local storm report, Dec 4, 5:35 PM CST, 1 hour 26 minutes before
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</html>The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 4, 6:16 PM CST | Special Weather Statement | TSA | Pushmataha | 29 min |
| Dec 4, 6:35 PM CST | Special Weather Statement | TSA | Pushmataha | 25 min |
| Dec 4, 7:08 PM CST | Special Weather Statement | TSA | LeFlore | 37 min |
| Dec 4, 7:40 PM CST | Special Weather Statement | TSA | LeFlore | 35 min |
| Dec 4, 6:03 PM CST | Special Weather Statement | TSA | Crawford | 42 min |
| Dec 4, 6:09 PM CST | Special Weather Statement | TSA | Carroll | 36 min |
| Dec 4, 6:37 PM CST | Special Weather Statement | TSA | Sebastian | 38 min |
Nearby
Special Weather Statements in Arkansas, 2017Every special weather statement 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.