Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 760, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Aug 9, 2017, 3:49 PM CDT for Dewey County, Ellis County, Roger Mills County, Oklahoma. It was in force for 26 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
- Aug 9, 2017, 3:49 PM CDT (20:49 UTC)
- Expired
- Aug 9, 2017, 4:15 PM CDT
- In force
- 26 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Dewey County, OK, Ellis County, OK, Roger Mills County, OK
The radar
The Vance AFB radar (KVNX), 149 km from the middle of the area, began a volume at 20:51 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
Dodge City, (KDDC), launched 12:00Z, 8.8 hours before the alert went out and 204 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
- 30 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 1017 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 197 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 Aug 9, 3:47 PM CDT, 2 minutes earlier.
Area forecast discussion, Aug 9, 3:47 PM CDT, 2 minutes before
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</html>Hazardous weather outlook, Aug 9, 11:30 AM CDT, 4 hours 19 minutes before
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</html>In the hours before
Special weather statement, Aug 9, 3:40 PM CDT, 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 340 PM CDT WED AUG 9 2017 OKZ009-010-014-015-092115- Woodward OK-Roger Mills OK-Dewey OK-Ellis OK- 340 PM CDT WED AUG 9 2017 ...SIGNIFICANT WEATHER ADVISORY FOR southwestern Woodward... northeastern Roger Mills...northwestern Dewey and southeastern Ellis Counties Until 415 PM CDT... AT 336 PM CDT, a strong thunderstorm was located near Harmon, moving east at 25 MPH. HAZARDS INCLUDE... Wind gusts to 40 MPH... Minor flooding in areas of poor drainage... Locations impacted include... Vici, Camargo and Harmon. LAT...LON 3604 9970 3620 9965 3618 9923 3592 9931 TIME...MOT...LOC 2036Z 282DEG 20KT 3611 9957 WR
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 3:40 PM CDT | Special Weather Statement | OUN | Ellis | 35 min |
| Aug 9, 4:23 PM CDT | Severe Thunderstorm Warning | OUN | Dewey, Ellis, Roger Mills | |
| Aug 9, 4:24 PM CDT | Severe Thunderstorm Warning | OUN | Custer, Dewey, Roger Mills | 51 min |
| Aug 9, 6:07 PM CDT | Special Weather Statement | OUN | Harper | 23 min |
| Aug 9, 6:30 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper | 30 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.