Alert archive / Oklahoma / Special Weather Statements in 2018
Special Weather Statement, NWS Norman, OK
NWS Norman, OK issued this special weather statement at May 17, 2018, 8:21 PM CDT for Washita County, Oklahoma. It was in force for 39 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 17, 2018, 8:21 PM CDT (01:21 UTC)
- Expired
- May 17, 2018, 9:00 PM CDT
- In force
- 39 min
- Issued by
- NWS Norman, OK
County Washita County, OK
The radar
The Altus AFB radar (KFDR), 123 km from the middle of the area, began a volume at 01:22 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
Amarillo Airport, TX (KAMA), launched 00:00Z, 1.4 hours before the alert went out and 223 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
- 695 J/kg
- Mixed-layer CIN
- -217 J/kg
- Mixed-layer LCL
- 1805 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 162 m²/s²
- 0-3 km storm-relative helicity
- 319 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Norman, OK wrote its last area forecast discussion before this special weather statement went out at May 17, 8:20 PM CDT, 1 minute earlier.
Area forecast discussion, May 17, 8:20 PM CDT, 1 minute before
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Special weather statement, May 17, 4:28 PM CDT, 3 hours 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 428 PM CDT THU MAY 17 2018 OKZ027-038-039-172200- Grady OK-Stephens OK-Comanche OK- 428 PM CDT THU MAY 17 2018 ...SIGNIFICANT WEATHER ADVISORY FOR southwestern Grady...north central Stephens and eastern Comanche Counties Until 500 PM CDT... AT 426 PM CDT, a strong thunderstorm was located 6 miles northeast of Sterling, moving southeast at 30 MPH. HAZARDS INCLUDE... Hail up to the size of quarters... Locations impacted include... Duncan, Marlow, Rush Springs, Bray and Acme. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the weather situation closely and be alert for threatening weather conditions. && LAT...LON 3480 9814 3489 9805 3469 9774 3456 9794 TIME...MOT...LOC 2126Z 314DEG 25KT 3481 9808 11
Local storm report, May 17, 5:05 PM CDT, 3 hours 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
505 PM CDT THU MAY 17 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0410 PM HAIL 1 S CYRIL 34.90N 98.19W
05/17/2018 E1.25 INCH CADDO OK BROADCAST MEDIA
TIME BASED ON RADAR.
&&
FMSpecial weather statement, May 17, 5:57 PM CDT, 2 hours 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
557 PM CDT THU MAY 17 2018
TXZ084-087-172315-
Foard TX-Knox TX-
557 PM CDT THU MAY 17 2018
...SIGNIFICANT WEATHER ADVISORY FOR southwestern Foard and
northwestern Knox Counties Until 615 PM CDT...
AT 555 PM CDT, a strong thunderstorm was located 12 miles northwest
of Benjamin, moving northeast at 15 MPH.
HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...
Locations impacted include...
Benjamin and Truscott.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 3388 9987 3362 9966 3351 9999 3371 10000
3381 10000
TIME...MOT...LOC 2255Z 233DEG 15KT 3365 9999
WRSpecial weather statement, May 17, 7:34 PM CDT, 47 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 734 PM CDT THU MAY 17 2018 OKZ014-021-180100- Roger Mills OK-Beckham OK- 734 PM CDT THU MAY 17 2018 ...SIGNIFICANT WEATHER ADVISORY FOR southwestern Roger Mills and northern Beckham Counties Until 800 PM CDT... AT 730 PM CDT, a strong thunderstorm was located near Sweetwater, moving east at 40 MPH. HAZARDS INCLUDE... Hail up to one-half inch diameter... Wind gusts to 50 MPH... Minor flooding in areas of poor drainage... Locations impacted include... Sayre, Sweetwater and Berlin. This includes Interstate 40 between mile markers 18 and 34. LAT...LON 3534 9998 3551 9993 3545 9945 3522 9957 TIME...MOT...LOC 0030Z 283DEG 37KT 3541 9986 WR
Special weather statement, May 17, 7:57 PM CDT, 24 minutes before
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</html>Special weather statement, May 17, 8:21 PM CDT, 0 minutes before
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</html>The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 7:34 PM CDT | Special Weather Statement | OUN | Beckham | 26 min |
| May 17, 9:13 PM CDT | Special Weather Statement | OUN | Comanche | 32 min |
| May 18, 4:11 AM CDT | Special Weather Statement | OUN | Custer | 19 min |
| May 18, 5:35 PM CDT | Special Weather Statement | OUN | Jackson | 25 min |
| May 18, 6:26 PM CDT | Severe Thunderstorm Warning | OUN | Jackson | 49 min |
| May 18, 6:27 PM CDT | Special Weather Statement | OUN | Harper | 33 min |
| May 18, 6:55 PM CDT | Severe Thunderstorm Warning | OUN | Harper | 50 min |
| May 17, 7:14 PM CDT | Severe Thunderstorm Warning | OUN | Knox | 46 min |
| May 17, 7:30 PM CDT | Areal Flood Advisory | OUN | Knox | 2 hr |
| May 17, 7:44 PM CDT | Flash Flood Warning | OUN | Knox | 2 hr |
| May 17, 7:57 PM CDT | Special Weather Statement | OUN | Hardeman | 33 min |
| May 17, 8:17 PM CDT | Severe Thunderstorm Warning | OUN | Knox | 28 min |
| May 17, 8:19 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Hardeman | 41 min |
| May 17, 9:03 PM CDT | Special Weather Statement | OUN | Baylor | 27 min |
| May 17, 10:43 PM CDT | Special Weather Statement | OUN | Clay | 32 min |
| May 18, 6:00 PM CDT | Special Weather Statement | OUN | Hardeman | 30 min |
Nearby
Special Weather Statements in Oklahoma, 2018Every special weather statement in 2018
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.