Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 711, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jul 23, 2017, 7:11 PM CDT for Comanche County, Kiowa County, Tillman County, Oklahoma. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 23, 2017, 7:11 PM CDT (00:11 UTC)
- Expired
- Jul 23, 2017, 8:00 PM CDT
- In force
- 49 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Comanche County, OK, Kiowa County, OK, Tillman County, OK
The radar
The Altus AFB radar (KFDR), 36 km from the middle of the area, began a volume at 00:11 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
Fort Worth, TX (KFWD), launched 00:00Z, 0.2 hours before the alert went out and 245 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
- 2042 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1940 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -42 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 23, 6:21 PM CDT, 50 minutes earlier.
Area forecast discussion, Jul 23, 6:21 PM CDT, 50 minutes before
Area Forecast Discussion
National Weather Service Norman OK
621 PM CDT Sun Jul 23 2017
...Aviation Discussion...
&&
.AVIATION...
For the 00z TAFs:
VFR conditions and light east-southeast winds are likely to
prevail through the TAF period. Thunderstorms at or in the
vicinity of CSM, LAW, and HBR may result in strong wind gusts and
brief reductions in visibility from heavy rain. Thunderstorms
should diminish by late evening.
&&
.PREV DISCUSSION... /issued 236 PM CDT Sun Jul 23 2017/
DISCUSSION...
Given latest observation trends, we will leave the Heat
Advisory/Excessive Heat Warning going through early evening.
Well detailed meso-discussion issued with previous updated AFD
still holding to our thinking. For the OKC metro - storm chances
will be tied to the area of elevated showers moving southeast
from Enid. Added convergence associated with this activity, which
is tied to a weakening MCV from overnight convection, may allow
scattered showers and storms to develop near/over the OKC metro
and progress south and east into the early evening hours. Brief
heavy rain and strong wind gusts will be the main concerns along
with cloud to ground lightning. Two other areas of concentrated
convection we will look for will be over western north Texas into
southwest Oklahoma associated with deformation east of two MCVs
over the southern panhandle and southwest TX high plains. The
other area is south central and southeast Oklahoma where better
moisture profiles and terrain could yield more in the way of
widespread convective development late this afternoon through this
evening. DCAPE values and weak shear will be supportive of
localized damaging wind gusts with the deeper/more persistent
cores.
Heights quickly build Monday and Tuesday which will allow
temperatures to rise back well above average. Moisture will not be
going anywhere as well, so heat indices will once again yield
likelihood for heat advisory/excessive heat warnings across the
area by mid-week. Models still indicating another respectable
trough to progress around upper ridge and push another weak front
into the region Thursday-Friday. Along with taking the edge off
the heat, the front will also yield scattered thunderstorms.
&&
.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK 97 74 96 74 / 40 20 20 20
Hobart OK 99 74 97 75 / 50 40 30 20
Wichita Falls TX 101 74 97 74 / 40 40 30 20
Gage OK 92 68 96 72 / 40 30 20 20
Ponca City OK 93 72 96 74 / 20 10 10 10
Durant OK 98 75 94 73 / 30 40 30 20
&&
.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Heat Advisory until 8 PM CDT this evening for OKZ019-020-025-026-
028-029-040-041-046-047-050>052.
Excessive Heat Warning until 8 PM CDT this evening for
OKZ030>032-042-043-048.
TX...None.
&&
12/11Hazardous weather outlook, Jul 23, 6:45 PM CDT, 26 minutes before
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Local storm report, Jul 23, 6:42 PM CDT, 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
642 PM CDT SUN JUL 23 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0555 PM TSTM WND GST HOBART 35.03N 99.09W
07/23/2017 E60 MPH KIOWA OK PUBLIC
&&
DWSpecial weather statement, Jul 23, 6:45 PM CDT, 26 minutes before
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</html>Local storm report, Jul 23, 6:57 PM CDT, 14 minutes before
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</html>Local storm report, Jul 23, 7:00 PM CDT, 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
700 PM CDT SUN JUL 23 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0642 PM TSTM WND DMG 3 N COALGATE 34.58N 96.22W
07/23/2017 COAL OK EMERGENCY MNGR
FIVE POWER LINES DOWNED FROM STRONG WINDS NEAR THE
INTERSECTION OF AVAZINI AND POLK ROADS
&&
MBSSpecial weather statement, Jul 23, 7:03 PM CDT, 8 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 703 PM CDT SUN JUL 23 2017 OKZ039-040-046-240030- Stephens OK-Carter OK-Garvin OK- 703 PM CDT SUN JUL 23 2017 ...SIGNIFICANT WEATHER ADVISORY FOR east central Stephens... northwestern Carter and southwestern Garvin Counties Until 730 PM CDT... AT 701 PM CDT, a strong thunderstorm was located 4 miles southwest of Foster. This storm was nearly stationary. HAZARDS INCLUDE... Wind gusts to 50 MPH... Minor flooding in areas of poor drainage... Locations impacted include... Katie, Foster, Tatums, Ratliff City and Pernell. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the weather situation closely and be alert for threatening weather conditions. && LAT...LON 3459 9769 3468 9756 3456 9730 3440 9751 TIME...MOT...LOC 0001Z 309DEG 2KT 3457 9754 11
Special weather statement, Jul 23, 7:05 PM CDT, 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 705 PM CDT SUN JUL 23 2017 OKZ022-023-035-240030- Kiowa OK-Washita OK-Caddo OK- 705 PM CDT SUN JUL 23 2017 ...SIGNIFICANT WEATHER ADVISORY FOR northeastern Kiowa...southeastern Washita and southwestern Caddo Counties Until 730 PM CDT... AT 705 PM CDT, strong thunderstorms were along a line extending from near Alfalfa to 5 miles west of Boone, moving east at 5 MPH. HAZARDS INCLUDE... Wind gusts to 50 MPH... Minor flooding in areas of poor drainage... Locations impacted include... Carnegie, Apache, Fort Cobb, Eakly, Fort Cobb Reservoir, Alfalfa, Albert, Boone and northern Lake Ellsworth. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the weather situation closely and be alert for threatening weather conditions. && LAT...LON 3533 9841 3486 9833 3485 9864 3530 9868 TIME...MOT...LOC 0005Z 278DEG 3KT 3522 9859 3493 9855 11
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 7:03 PM CDT | Special Weather Statement | OUN | Garvin | 27 min |
| Jul 23, 7:05 PM CDT | Special Weather Statement | OUN | Caddo | 25 min |
| Jul 23, 7:31 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche | 25 min |
| Jul 23, 7:33 PM CDT | Special Weather Statement | OUN | Bryan | 27 min |
| Jul 23, 7:34 PM CDT | Severe Thunderstorm Warning | OUN | Comanche | 26 min |
| Jul 23, 7:42 PM CDT | Special Weather Statement | OUN | Tillman | 33 min |
| Jul 23, 7:44 PM CDT | Areal Flood Advisory | OUN | Caddo | 3 hr |
| Jul 23, 7:50 PM CDT | Special Weather Statement | OUN | Washita | 25 min |
| Jul 23, 8:03 PM CDT | Special Weather Statement | OUN | Bryan | 27 min |
| Jul 23, 8:09 PM CDT | Special Weather Statement | OUN | Tillman | 36 min |
| Jul 23, 8:18 PM CDT | Special Weather Statement | OUN | Johnston | 27 min |
| Jul 23, 8:22 PM CDT | Special Weather Statement | OUN | Tillman | 23 min |
| Jul 23, 8:24 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 51 min |
| Jul 23, 9:04 PM CDT | Special Weather Statement | OUN | Garvin | 26 min |
| Jul 23, 9:32 PM CDT | Special Weather Statement | OUN | Stephens | 28 min |
| Jul 23, 10:09 PM CDT | Areal Flood Advisory | OUN | Cotton | 3 hr |
| Jul 24, 3:31 PM CDT | Heat Advisory | OUN | Atoka, Bryan, Canadian, Carter, Cleveland, Coal and 22 more | 28 hr |
| Jul 23, 7:38 PM CDT | Severe Thunderstorm Warning | OUN | Archer, Wichita | 52 min |
| Jul 23, 8:50 PM CDT | Special Weather Statement | OUN | Wichita, Wilbarger | 25 min |
| Jul 23, 9:57 PM CDT | Special Weather Statement | OUN | Clay | 33 min |
| Jul 23, 10:23 PM CDT | Areal Flood Advisory | OUN | Archer | 3 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.