Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 21, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 20, 2014, 4:39 PM CDT for Beckham County, Roger Mills County, Oklahoma. It was in force for 51 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
- Apr 20, 2014, 4:39 PM CDT (21:39 UTC)
- Expired
- Apr 20, 2014, 5:30 PM CDT
- In force
- 51 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
Counties Beckham County, OK, Roger Mills County, OK
The radar
The Altus AFB radar (KFDR), 158 km from the middle of the area, began a volume at 21:40 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 12:00Z, 9.7 hours before the alert went out and 165 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 974 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
054 WUUS54 KOUN 202139 SVROUN OKC009-129-202230- /O.NEW.KOUN.SV.W.0021.140420T2139Z-140420T2230Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORMAN OK 439 PM CDT SUN APR 20 2014 THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN BECKHAM COUNTY IN WESTERN OKLAHOMA... SOUTHWESTERN ROGER MILLS COUNTY IN WESTERN OKLAHOMA... * UNTIL 530 PM CDT * AT 438 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 5 MILES SOUTHWEST OF SWEETWATER...MOVING NORTH AT 30 MPH. HAZARD...HALF DOLLAR SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...DAMAGE TO VEHICLES IS EXPECTED. * LOCATIONS IMPACTED INCLUDE... REYDON...SWEETWATER AND DEMPSEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN NORMAN. && LAT...LON 3583 10000 3570 9972 3515 9990 3525 10000 TIME...MOT...LOC 2138Z 194DEG 28KT 3539 9999 HAIL...1.25IN WIND...<50MPH $$ 17
2 follow-up statements
460
WWUS54 KOUN 202149
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
449 PM CDT SUN APR 20 2014
OKC009-129-202230-
/O.CON.KOUN.SV.W.0021.000000T0000Z-140420T2230Z/
BECKHAM OK-ROGER MILLS OK-
449 PM CDT SUN APR 20 2014
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR NORTHWESTERN BECKHAM AND SOUTHWESTERN ROGER MILLS COUNTIES...
AT 449 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR SWEETWATER...
MOVING NORTH AT 30 MPH. ANOTHER SEVERE THUNDERSTORM WAS LOCATED 3
MILES NORTHWEST OF ERICK...MOVING NORTHEAST AT 20 MPH.
HAZARD...HALF DOLLAR SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...DAMAGE TO VEHICLES IS EXPECTED.
LOCATIONS IMPACTED INCLUDE...
REYDON...SWEETWATER AND DEMPSEY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF A TORNADO OR OTHER SEVERE WEATHER IS SPOTTED...REPORT IT TO THE
NATIONAL WEATHER SERVICE OR YOUR LOCAL AUTHORITY WHO WILL SEND YOUR
REPORT. THIS ACT MAY SAVE LIVES OF OTHERS IN THE PATH OF DANGEROUS
WEATHER.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN
NORMAN.
&&
LAT...LON 3583 10000 3570 9972 3522 9988 3523 9997
3530 9997 3534 10000
TIME...MOT...LOC 2149Z 194DEG 27KT 3545 9997
HAIL...1.25IN
WIND...<50MPH
$$
17772
WWUS54 KOUN 202200
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
500 PM CDT SUN APR 20 2014
OKC009-129-202209-
/O.CAN.KOUN.SV.W.0021.000000T0000Z-140420T2230Z/
BECKHAM OK-ROGER MILLS OK-
500 PM CDT SUN APR 20 2014
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BECKHAM AND
SOUTHWESTERN ROGER MILLS COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED. HOWEVER SMALL HAIL IS
STILL POSSIBLE WITH THIS THUNDERSTORM.
LAT...LON 3583 10000 3570 9972 3522 9988 3523 9997
3530 9997 3534 10000
TIME...MOT...LOC 2158Z 194DEG 28KT 3553 9995
$$
17The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 4:26 PM CDT | Special Weather Statement | OUN | Beckham | 64 min |
| Apr 20, 5:17 PM CDT | Severe Thunderstorm Warning | OUN | Harmon | 43 min |
| Apr 20, 5:48 PM CDT | Severe Thunderstorm Warning | OUN | Harmon, Jackson | 42 min |
| Apr 20, 5:53 PM CDT | Special Weather Statement | OUN | Ellis, Harper | 52 min |
| Apr 20, 5:55 PM CDT | Tornado Warning | OUN | Harmon | 35 min |
| Apr 20, 6:13 PM CDT | Special Weather Statement | OUN | Harper | 47 min |
| Apr 20, 6:26 PM CDT | Severe Thunderstorm Warning | OUN | Harmon, Jackson | 49 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2014Every severe thunderstorm warning in 2014
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.