Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 421, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Aug 10, 2017, 7:09 PM CDT for Nowata County, Washington County, Oklahoma. It was in force for 36 min. 11 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
- Aug 10, 2017, 7:09 PM CDT (00:09 UTC)
- Expired
- Aug 10, 2017, 7:45 PM CDT
- In force
- 36 min
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Nowata County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 80 km from the middle of the area, began a volume at 00:09 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 |
|---|---|---|---|
| Aug 10, 7:19 PM CDT | TSTM WND GST 70 | 1 Sse Copan, OK | |
| Aug 10, 7:25 PM CDT | TSTM WND GST 73 | 2 Ene Copan, OK | |
| Aug 10, 7:30 PM CDT | TSTM WND DMG | 2 E Copan, OK | STRONG THUNDERSTORM WIND SEVERELY DAMAGED THE ROOFS OF THREE HOMES |
| Aug 10, 7:30 PM CDT | TSTM WND GST 70 | 2 Ene Copan, OK | |
| Aug 10, 7:32 PM CDT | TSTM WND GST 70 | 1 Se Copan, OK | ESTIMATED THUNDERSTORM WIND GUST TO 70 MPH AT 900 RD AND HWY 75. |
| Aug 10, 7:35 PM CDT | TSTM WND DMG | 2 Se Copan, OK | POWERLINES DOWN ON ROADWAY AT W1100 RD AND HWY 75. |
| Aug 10, 7:35 PM CDT | TSTM WND DMG | 2 Se Copan, OK | TREE BRANCHES DAMAGED/BROKEN NEAR 1100 RD AND HWY 75. |
| Aug 10, 7:35 PM CDT | TSTM WND DMG | Dewey, OK | LARGE METAL BARN SEVERLY DAMAGED. |
| Aug 10, 7:36 PM CDT | TSTM WND DMG | 3 Wsw Wann, OK | TREES AND POWER LINES DOWN ALONG HWY 10 AND HWY 75. HWY 75 CLOSED. |
| Aug 10, 7:36 PM CDT | TSTM WND GST 70 | 3 Wsw Wann, OK | |
| Aug 10, 7:40 PM CDT | TSTM WND DMG | 3 Se Copan, OK | POWER LINES DOWN NEAR W 1100 RD AND N 4000 RD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 10, 2:06 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 0.2 hours before the alert went out and 178 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
- 1344 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 1104 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.7
The text
As transmitted.
919
WUUS54 KTSA 110009
SVRTSA
OKC105-147-110045-
/O.NEW.KTSA.SV.W.0421.170811T0009Z-170811T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
709 PM CDT THU AUG 10 2017
The National Weather Service in Tulsa has issued a
* Severe Thunderstorm Warning for...
Northern Washington County in northeastern Oklahoma...
Northwestern Nowata County in northeastern Oklahoma...
* Until 745 PM CDT
* At 709 PM CDT, a severe thunderstorm was located 4 miles south of
Caney, moving southeast at 30 mph.
HAZARD...60 mph wind gusts and half dollar 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...
Bartlesville... Dewey...
Copan... Lenapah...
Wann...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3689 9552 3665 9596 3678 9600 3700 9600
3700 9578
TIME...MOT...LOC 0009Z 308DEG 27KT 3696 9594
HAIL...1.25IN
WIND...60MPH
$$2 follow-up statements
464
WWUS54 KTSA 110021
SVSTSA
Severe Weather Statement
National Weather Service Tulsa OK
721 PM CDT THU AUG 10 2017
OKC105-147-110045-
/O.CON.KTSA.SV.W.0421.000000T0000Z-170811T0045Z/
Washington OK-Nowata OK-
721 PM CDT THU AUG 10 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHERN WASHINGTON AND NORTHWESTERN NOWATA COUNTIES...
At 720 PM CDT, a severe thunderstorm was located near Copan, moving
southeast at 35 mph.
HAZARD...70 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations in or near the path include...
Bartlesville... Dewey...
Copan... Lenapah...
Wann...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3689 9552 3665 9596 3700 9600 3700 9578
TIME...MOT...LOC 0020Z 318DEG 29KT 3690 9588
HAIL...1.25IN
WIND...70MPH
$$048
WWUS54 KTSA 110035
SVSTSA
Severe Weather Statement
National Weather Service Tulsa OK
735 PM CDT THU AUG 10 2017
OKC105-147-110045-
/O.CON.KTSA.SV.W.0421.000000T0000Z-170811T0045Z/
Washington OK-Nowata OK-
735 PM CDT THU AUG 10 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR NORTHERN WASHINGTON AND NORTHWESTERN NOWATA COUNTIES...
At 734 PM CDT, a severe thunderstorm was located 6 miles south of
Wann, moving southeast at 35 mph. A 73 mph wind gust was measured 2
miles east northeast of Copan at 725 PM.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations in or near the path include...
Bartlesville... Dewey...
Copan... Lenapah...
Wann...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building. This storm is capable of producing wind damage.
&&
LAT...LON 3673 9581 3666 9595 3690 9599 3691 9599
3697 9578 3687 9555
TIME...MOT...LOC 0034Z 324DEG 31KT 3682 9582
HAIL...1.00IN
WIND...70MPH
$$The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 7:38 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Rogers, Washington | 52 min |
| Aug 10, 7:46 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 29 min |
| Aug 10, 8:09 PM CDT | Severe Thunderstorm Warning | TSA | Mayes, Rogers | 51 min |
| Aug 10, 8:15 PM CDT | Special Weather Statement | TSA | Osage | 30 min |
| Aug 10, 8:55 PM CDT | Special Weather Statement | TSA | Mayes | 35 min |
| Aug 10, 9:42 PM CDT | Special Weather Statement | TSA | Mayes | 33 min |
| Aug 10, 10:15 PM CDT | Special Weather Statement | TSA | Mayes | 30 min |
| Aug 11, 2:01 AM CDT | Flash Flood Watch | TSA | Adair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more | 7 hr |
| Aug 11, 3:45 AM CDT | Special Weather Statement | TSA | Pawnee | 45 min |
| Aug 11, 3:55 AM CDT | Special Weather Statement | TSA | Ottawa | 35 min |
| Aug 11, 3:58 AM CDT | Special Weather Statement | TSA | Washington | 47 min |
| Aug 11, 4:05 AM CDT | Special Weather Statement | TSA | Creek, Okfuskee | 40 min |
| Aug 11, 4:19 AM CDT | Areal Flood Advisory | TSA | Tulsa | 3 hr |
| Aug 11, 4:22 AM CDT | Special Weather Statement | TSA | Tulsa | 38 min |
| Aug 11, 5:29 AM CDT | Special Weather Statement | TSA | Muskogee, Wagoner | 46 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2017Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.