Alert archive / Oklahoma / Frost Advisories in 2021
Frost Advisory 1, NWS Tulsa, OK
NWS Tulsa, OK issued this frost advisory at Apr 21, 2021, 3:41 AM CDT for 4 counties in Arkansas; 5 counties in Oklahoma. It took effect at Apr 22, 2021, 1:00 AM CDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Apr 21, 2021, 3:41 AM CDT (08:41 UTC)
- In effect from
- Apr 22, 2021, 1:00 AM CDT
- Expired
- Apr 21, 2021, 1:18 PM CDT
- In force
- Issued by
- NWS Tulsa, OK
Counties Benton County, AR, Carroll County, AR, Madison County, AR, Washington County, AR, Adair County, OK, Craig County, OK, Delaware County, OK, Nowata County, OK, Ottawa County, OK
The radar
The Tulsa radar (KINX), 95 km from the middle of the area, began a volume at 08:39 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
Springfield, MO (KSGF), launched 00:00Z, 8.7 hours before the alert went out and 88 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
- 8 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 830 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- -66 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
622 WWUS74 KTSA 210841 NPWTSA URGENT - WEATHER MESSAGE National Weather Service Tulsa OK 341 AM CDT Wed Apr 21 2021 ARZ001-002-010-011-OKZ056>058-063-069-211645- /O.NEW.KTSA.FR.Y.0001.210422T0600Z-210422T1300Z/ /O.CON.KTSA.FZ.W.0003.000000T0000Z-210421T1400Z/ Benton-Carroll-Washington AR-Madison-Nowata-Craig-Ottawa-Delaware- Adair- Including the cities of Rogers, Bentonville, Berryville, Eureka Springs, Fayetteville, Springdale, Huntsville, Nowata, Vinita, Miami, Grove, Jay, and Stilwell 341 AM CDT Wed Apr 21 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM CDT THURSDAY... * WHAT...For the Freeze Warning today, sub-freezing temperatures as low as the mid 20s. For the Frost Advisory tonight, temperatures as low as 32 will result in frost formation. * WHERE...In Oklahoma, Nowata, Craig, Ottawa, Delaware and Adair Counties. In Arkansas, Benton, Carroll, Washington AR and Madison Counties. * WHEN...For the Freeze Warning, until 9 AM CDT this morning. For the Frost Advisory, from 1 AM to 8 AM CDT Thursday. * IMPACTS...These conditions will kill plants and other tender vegetation that are left outdoors or unprotected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Precautions should also be taken to protect small plants and tender vegetation. && $$ ARZ019-020-029-OKZ049-053>055-059>062-064>068-070>076-211400- /O.CON.KTSA.FZ.W.0003.000000T0000Z-210421T1400Z/ Crawford-Franklin-Sebastian-Pushmataha-Choctaw-Osage- Washington OK-Pawnee-Tulsa-Rogers-Mayes-Creek-Okfuskee-Okmulgee- Wagoner-Cherokee-Muskogee-McIntosh-Sequoyah-Pittsburg-Haskell- Latimer-Le Flore- Including the cities of Van Buren, Ozark, Charleston, Fort Smith, Antlers, Clayton, Hugo, Pawhuska, Bartlesville, Pawnee, Tulsa, Claremore, Pryor, Sapulpa, Okemah, Okmulgee, Wagoner, Tahlequah, Muskogee, Checotah, Sallisaw, McAlester, Stigler, Wilburton, and Poteau 341 AM CDT Wed Apr 21 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as the mid 20s expected. * WHERE...Portions of east central, northeast and southeast Oklahoma and northwest and west central Arkansas. * WHEN...From 11 PM this evening to 9 AM CDT Wednesday. * IMPACTS...These conditions will kill plants and other tender vegetation that are left outdoors or unprotected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Precautions should also be taken to protect small plants and tender vegetation. && $$ Stay tuned to NOAA weather radio,commercial radio or television for the latest information,forecasts,and warnings. For more information from the National Weather Service visit https://weather.gov/tsa
3 follow-up statements
150 WWUS74 KTSA 211354 NPWTSA URGENT - WEATHER MESSAGE National Weather Service Tulsa OK 854 AM CDT Wed Apr 21 2021 ARZ001-002-010-011-OKZ056>058-063-069-212200- /O.EXP.KTSA.FZ.W.0003.000000T0000Z-210421T1400Z/ /O.CON.KTSA.FR.Y.0001.210422T0600Z-210422T1300Z/ Benton-Carroll-Washington AR-Madison-Nowata-Craig-Ottawa-Delaware- Adair- Including the cities of Rogers, Bentonville, Berryville, Eureka Springs, Fayetteville, Springdale, Huntsville, Nowata, Vinita, Miami, Grove, Jay, and Stilwell 854 AM CDT Wed Apr 21 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM CDT THURSDAY... ...FREEZE WARNING WILL EXPIRE AT 9 AM CDT THIS MORNING... * WHAT...Temperatures as low as 33 will result in frost formation tonight into Thursday morning. * WHERE...In Oklahoma, Nowata, Craig, Ottawa, Delaware and Adair Counties. In Arkansas, Benton, Carroll, Washington AR and Madison Counties. * WHEN...For the Frost Advisory, from 1 AM to 8 AM CDT Thursday. * IMPACTS...Sensitive outdoor plants may be killed if left unprotected from the cold. PRECAUTIONARY/PREPAREDNESS ACTIONS... Cover outdoor plants or bring them indoors. && $$ ARZ019-020-029-OKZ049-053>055-059>062-064>068-070>076-211500- /O.EXP.KTSA.FZ.W.0003.000000T0000Z-210421T1400Z/ Crawford-Franklin-Sebastian-Pushmataha-Choctaw-Osage- Washington OK-Pawnee-Tulsa-Rogers-Mayes-Creek-Okfuskee-Okmulgee- Wagoner-Cherokee-Muskogee-McIntosh-Sequoyah-Pittsburg-Haskell- Latimer-Le Flore- Including the cities of Van Buren, Ozark, Charleston, Fort Smith, Antlers, Clayton, Hugo, Pawhuska, Bartlesville, Pawnee, Tulsa, Claremore, Pryor, Sapulpa, Okemah, Okmulgee, Wagoner, Tahlequah, Muskogee, Checotah, Sallisaw, McAlester, Stigler, Wilburton, and Poteau 854 AM CDT Wed Apr 21 2021 ...FREEZE WARNING WILL EXPIRE AT 9 AM CDT THIS MORNING... Temperatures have warmed above freezing for most locations across eastern Oklahoma and northwest Arkansas. Any remaining locations will continue to warm above freezing over the next hour, thus the freeze warning will be allowed to expire. $$ Stay tuned to NOAA weather radio,commercial radio or television for the latest information,forecasts,and warnings. For more information from the National Weather Service visit https://weather.gov/tsa
413 WWUS74 KTSA 211534 NPWTSA URGENT - WEATHER MESSAGE National Weather Service Tulsa OK 1034 AM CDT Wed Apr 21 2021 ARZ001-002-010-011-OKZ056>058-063-069-220000- /O.CON.KTSA.FR.Y.0001.210422T0600Z-210422T1300Z/ Benton-Carroll-Washington AR-Madison-Nowata-Craig-Ottawa-Delaware- Adair- Including the cities of Rogers, Bentonville, Berryville, Eureka Springs, Fayetteville, Springdale, Huntsville, Nowata, Vinita, Miami, Grove, Jay, and Stilwell 1034 AM CDT Wed Apr 21 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM CDT THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation tonight into Thursday morning. * WHERE...In Oklahoma, Nowata, Craig, Ottawa, Delaware and Adair Counties. In Arkansas, Benton, Carroll, Washington AR and Madison Counties. * WHEN...For the Frost Advisory, from 1 AM to 8 AM CDT Thursday. * IMPACTS...Sensitive outdoor plants may be killed if left unprotected from the cold. PRECAUTIONARY/PREPAREDNESS ACTIONS... Cover outdoor plants or bring them indoors. && $$ Stay tuned to NOAA weather radio,commercial radio or television for the latest information,forecasts,and warnings. For more information from the National Weather Service visit https://weather.gov/tsa
166 WWUS74 KTSA 211818 NPWTSA URGENT - WEATHER MESSAGE National Weather Service Tulsa OK 118 PM CDT Wed Apr 21 2021 ARZ001-002-010-011-OKZ056>058-063-069-221300- /O.UPG.KTSA.FR.Y.0001.210422T0600Z-210422T1300Z/ /O.NEW.KTSA.FZ.W.0004.210422T0600Z-210422T1300Z/ Benton-Carroll-Washington AR-Madison-Nowata-Craig-Ottawa-Delaware- Adair- Including the cities of Rogers, Bentonville, Berryville, Eureka Springs, Fayetteville, Springdale, Huntsville, Nowata, Vinita, Miami, Grove, Jay, and Stilwell 118 PM CDT Wed Apr 21 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 8 AM CDT THURSDAY... * WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...In Oklahoma, Nowata, Craig, Ottawa, Delaware and Adair Counties. In Arkansas, Benton, Carroll, Washington AR and Madison Counties. * WHEN...From 1 AM to 8 AM CDT Thursday. * IMPACTS...These conditions will kill plants and other tender vegetation that are left outdoors or unprotected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Precautions should be taken to protect small plants and tender vegetation. && $$ Stay tuned to NOAA weather radio,commercial radio or television for the latest information,forecasts,and warnings. For more information from the National Weather Service visit https://weather.gov/tsa
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 1:18 PM CDT | Freeze Warning | TSA | Benton, Carroll, Madison, Washington | 19 hr |
Nearby
Frost Advisories in Oklahoma, 2021Frost Advisories in Arkansas, 2021Every frost advisory 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.