Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 477, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Sep 3, 2021, 4:14 PM CDT for Alfalfa County, Woods County, Oklahoma. It was in force for 46 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
- Sep 3, 2021, 4:14 PM CDT (21:14 UTC)
- Expired
- Sep 3, 2021, 5:00 PM CDT
- In force
- 46 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Alfalfa County, OK, Woods County, OK
The radar
The Vance AFB radar (KVNX), 26 km from the middle of the area, began a volume at 21:15 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, 9.2 hours before the alert went out and 180 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
- 885 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 1122 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 117 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.1
The text
As transmitted.
444 WUUS54 KOUN 032114 SVROUN OKC003-151-032200- /O.NEW.KOUN.SV.W.0477.210903T2114Z-210903T2200Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Norman OK 414 PM CDT Fri Sep 3 2021 The National Weather Service in Norman has issued a * Severe Thunderstorm Warning for... East central Woods County in northwestern Oklahoma... Central Alfalfa County in northwestern Oklahoma... * Until 500 PM CDT. * At 414 PM CDT, a severe thunderstorm was located near Lambert, moving east at 15 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Cherokee, Jet, Dacoma, Lambert, Great Salt Plains Lake and Ingersoll. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Large hail and damaging winds and continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. && LAT...LON 3659 9856 3676 9860 3685 9817 3658 9812 TIME...MOT...LOC 2114Z 262DEG 14KT 3669 9849 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ Ware
2 follow-up statements
094
WWUS54 KOUN 032136
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
436 PM CDT Fri Sep 3 2021
OKC151-032145-
/O.CAN.KOUN.SV.W.0477.000000T0000Z-210903T2200Z/
Woods OK-
436 PM CDT Fri Sep 3 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WOODS COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3659 9839 3679 9845 3685 9817 3658 9812
TIME...MOT...LOC 2135Z 262DEG 14KT 3670 9839
$$
OKC003-032200-
/O.CON.KOUN.SV.W.0477.000000T0000Z-210903T2200Z/
Alfalfa OK-
436 PM CDT Fri Sep 3 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR CENTRAL ALFALFA COUNTY...
At 435 PM CDT, a severe thunderstorm was located near Lambert, moving
east at 15 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Cherokee, Jet, Great Salt Plains Lake and Ingersoll.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3659 9839 3679 9845 3685 9817 3658 9812
TIME...MOT...LOC 2135Z 262DEG 14KT 3670 9839
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Ware696
WWUS54 KOUN 032151
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
451 PM CDT Fri Sep 3 2021
OKC003-032201-
/O.EXP.KOUN.SV.W.0477.000000T0000Z-210903T2200Z/
Alfalfa OK-
451 PM CDT Fri Sep 3 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ALFALFA COUNTY WILL
EXPIRE AT 500 PM CDT...
The storm which prompted the warning has weakened below severe
limits, therefore the warning will be allowed to expire.
LAT...LON 3659 9839 3679 9845 3685 9817 3658 9812
TIME...MOT...LOC 2151Z 262DEG 14KT 3671 9833
$$
WareThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 3:02 AM CDT | Heat Advisory | OUN | Hughes, Lincoln, Logan, Payne, Pottawatomie, Seminole | 16 hr |
| Sep 3, 2:45 PM CDT | Special Weather Statement | OUN | Woods | 30 min |
| Sep 3, 3:00 PM CDT | Special Weather Statement | OUN | Harper | 30 min |
| Sep 3, 3:07 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper | 38 min |
| Sep 3, 3:14 PM CDT | Special Weather Statement | OUN | Woods | 31 min |
| Sep 3, 3:45 PM CDT | Special Weather Statement | OUN | Ellis, Harper | 30 min |
| Sep 3, 3:49 PM CDT | Special Weather Statement | OUN | Alfalfa | 26 min |
| Sep 3, 4:17 PM CDT | Special Weather Statement | OUN | Ellis, Woodward | 28 min |
| Sep 3, 4:48 PM CDT | Special Weather Statement | OUN | Woodward | 42 min |
| Sep 3, 5:30 PM CDT | Special Weather Statement | OUN | Woods | 30 min |
| Sep 3, 6:04 PM CDT | Special Weather Statement | OUN | Garfield | 26 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2021Every severe thunderstorm warning 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.