Alert archive / Oklahoma / Special Weather Statements in 2021
Special Weather Statement, NWS Norman, OK
NWS Norman, OK issued this special weather statement at Jul 18, 2021, 8:21 PM CDT for Greer County, Oklahoma. It was in force for 24 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
- Jul 18, 2021, 8:21 PM CDT (01:21 UTC)
- Expired
- Jul 18, 2021, 8:45 PM CDT
- In force
- 24 min
- Issued by
- NWS Norman, OK
County Greer County, OK
The radar
The Altus AFB radar (KFDR), 75 km from the middle of the area, began a volume at 01:20 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 198 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
- 775 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 1818 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
320 WWUS84 KOUN 190121 SPSOUN SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 821 PM CDT Sun Jul 18 2021 OKZ034-036-190145- Greer OK-Jackson OK- 821 PM CDT Sun Jul 18 2021 ...SIGNIFICANT WEATHER ADVISORY FOR south central Greer and north central Jackson Counties Until 845 PM CDT... AT 816 PM CDT, a strong thunderstorm was located 5 miles west of Mangum, moving southeast at 30 MPH. HAZARDS INCLUDE... Hail up to the size of nickels... Wind gusts to 50 MPH... LAT...LON 3490 9973 3498 9954 3471 9931 3460 9960 TIME...MOT...LOC 0116Z 333DEG 25KT 3488 9960 $$ ..speg.
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 7:02 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 43 min |
| Jul 18, 7:06 PM CDT | Special Weather Statement | OUN | Cleveland | 24 min |
| Jul 18, 7:19 PM CDT | Areal Flood Advisory | OUN | Cleveland | 4 hr |
| Jul 18, 7:23 PM CDT | Areal Flood Advisory | OUN | Atoka, Coal, Hughes | 4 hr |
| Jul 18, 7:27 PM CDT | Special Weather Statement | OUN | Grady | 33 min |
| Jul 18, 7:36 PM CDT | Special Weather Statement | OUN | Beckham | 24 min |
| Jul 18, 7:58 PM CDT | Special Weather Statement | OUN | Pontotoc | 32 min |
| Jul 18, 8:56 PM CDT | Special Weather Statement | OUN | Jackson, Kiowa | 49 min |
| Jul 18, 8:58 PM CDT | Special Weather Statement | OUN | Carter, Garvin, Murray | 32 min |
| Jul 18, 9:20 PM CDT | Severe Thunderstorm Warning | OUN | Johnston, Marshall | 28 min |
| Jul 18, 9:59 PM CDT | Special Weather Statement | OUN | Tillman | 61 min |
| Jul 18, 10:03 PM CDT | Areal Flood Advisory | OUN | Carter, Garvin, Johnston, McClain, Murray, Pottawatomie | 4 hr |
| Jul 18, 10:10 PM CDT | Areal Flood Advisory | OUN | Harmon, Jackson | 5 hr |
| Jul 18, 10:49 PM CDT | Special Weather Statement | OUN | Pottawatomie | 26 min |
| Jul 19, 12:18 AM CDT | Areal Flood Advisory | OUN | Caddo, Comanche, Grady | 3 hr |
| Jul 19, 1:03 AM CDT | Areal Flood Advisory | OUN | Comanche | 3 hr |
| Jul 19, 4:01 AM CDT | Areal Flood Advisory | OUN | Carter, Jefferson, Love, Marshall, Murray, Stephens | 5 hr |
| Jul 19, 7:46 AM CDT | Areal Flood Advisory | OUN | Johnston, Pontotoc | 3 hr |
| Jul 19, 8:12 AM CDT | Flash Flood Warning | OUN | Johnston, Pontotoc | 3 hr |
| Jul 18, 10:20 PM CDT | Special Weather Statement | OUN | Foard | 25 min |
| Jul 18, 11:40 PM CDT | Special Weather Statement | OUN | Archer, Baylor, Clay, Wichita | 50 min |
| Jul 19, 12:22 AM CDT | Areal Flood Advisory | OUN | Archer, Baylor | 3 hr |
| Jul 19, 12:49 AM CDT | Areal Flood Advisory | OUN | Archer, Wichita | 3 hr |
| Jul 19, 3:46 PM CDT | Special Weather Statement | OUN | Fannin |
Nearby
Special Weather Statements in Oklahoma, 2021Every special weather statement in 2021
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.