Alert archive / Mississippi / Frost Advisories in 2021
Frost Advisory 1, NWS Memphis, TN
NWS Memphis, TN issued this frost advisory at Mar 31, 2021, 2:34 PM CDT for 9 counties in Mississippi; Phillips County, Arkansas. It took effect at Apr 1, 2021, 1:00 AM CDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Mar 31, 2021, 2:34 PM CDT (19:34 UTC)
- In effect from
- Apr 1, 2021, 1:00 AM CDT
- Expired
- Apr 1, 2021, 8:13 AM CDT
- In force
- 7 hr
- Issued by
- NWS Memphis, TN
Counties Phillips County, AR, Calhoun County, MS, Chickasaw County, MS, Coahoma County, MS, Itawamba County, MS, Lee County, MS, Monroe County, MS, Quitman County, MS, Tallahatchie County, MS, Yalobusha County, MS
The radar
The Columbus AFB radar (KGWX), 115 km from the middle of the area, began a volume at 19:33 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
Little Rock, AR (KLZK), launched 12:00Z, 7.6 hours before the alert went out and 87 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
- 2265 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- -180 m²/s²
- 0-3 km storm-relative helicity
- -58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted.
639 WWUS74 KMEG 311934 NPWMEG URGENT - WEATHER MESSAGE National Weather Service Memphis TN 234 PM CDT Wed Mar 31 2021 ARZ035-036-TNZ088>092-011200- /O.UPG.KMEG.FZ.A.0001.210401T0600Z-210401T1400Z/ /O.UPG.KMEG.FZ.A.0002.210402T0500Z-210402T1400Z/ /O.NEW.KMEG.FZ.W.0002.210402T0500Z-210402T1400Z/ /O.EXA.KMEG.FZ.W.0001.210401T0600Z-210401T1400Z/ Cross-Crittenden-Shelby-Fayette-Hardeman-McNairy-Hardin- Including the cities of Wynne, West Memphis, Bartlett, Germantown, Collierville, Memphis, Millington, Somerville, Oakland, Bolivar, Selmer, and Savannah 234 PM CDT Wed Mar 31 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... ...FREEZE WARNING IN EFFECT FROM MIDNIGHT THURSDAY NIGHT TO 9 AM CDT FRIDAY... * WHAT...For tonight's Freeze Warning, sub-freezing temperatures of 30 to 32 are expected. For the second Freeze Warning, sub- freezing temperatures as low as 27 are expected. * WHERE...In Tennessee, Shelby, Fayette, Hardeman, McNairy and Hardin Counties. In Arkansas, Cross and Crittenden Counties. * WHEN...For the Freeze Warning, from 1 AM to 9 AM CDT Thursday. For the Freeze Warning, from midnight Thursday night to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ ARZ009-018-026>028-MOZ113-115-TNZ001>004-019>022-048>055-011200- /O.UPG.KMEG.FZ.A.0002.210402T0500Z-210402T1400Z/ /O.NEW.KMEG.FZ.W.0002.210402T0500Z-210402T1400Z/ /O.CON.KMEG.FZ.W.0001.210401T0600Z-210401T1400Z/ Clay-Greene-Craighead-Poinsett-Mississippi-Dunklin-Pemiscot-Lake- Obion-Weakley-Henry-Dyer-Gibson-Carroll-Benton TN-Lauderdale- Tipton-Haywood-Crockett-Madison-Chester-Henderson-Decatur- Including the cities of Piggott, Corning, Paragould, Jonesboro, Harrisburg, Blytheville, Kennett, Caruthersville, Tiptonville, Union City, Martin, Dresden, Paris, Dyersburg, Humboldt, Milan, Huntingdon, Camden, Ripley TN, Covington, Brownsville, Alamo, Jackson, Henderson, Lexington, Parsons, and Decaturville 234 PM CDT Wed Mar 31 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... ...FREEZE WARNING IN EFFECT FROM MIDNIGHT THURSDAY NIGHT TO 9 AM CDT FRIDAY... * WHAT...For tonight's Freeze Warning, sub-freezing temperatures of 28 to 32 are expected. For the second Freeze Warning, sub- freezing temperatures as low as 25 are expected. * WHERE...Portions of West Tennessee, East Arkansas and Southeast Missouri. * WHEN...For the Freeze Warning, from 1 AM to 9 AM CDT Thursday. For the Freeze Warning, from midnight Thursday night to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ ARZ048-049-MSZ001>009-012>015-011200- /O.UPG.KMEG.FZ.A.0002.210402T0500Z-210402T1400Z/ /O.NEW.KMEG.FZ.W.0002.210402T0500Z-210402T1400Z/ /O.EXA.KMEG.FZ.W.0001.210401T0600Z-210401T1400Z/ St. Francis-Lee AR-DeSoto-Marshall-Benton MS-Tippah-Alcorn- Tishomingo-Tunica-Tate-Prentiss-Panola-Lafayette-Union-Pontotoc- Including the cities of Forrest City, Marianna, Southaven, Olive Branch, Holly Springs, Ashland, Ripley MS, Corinth, Iuka, Tunica, Senatobia, Booneville, Batesville, Oxford, New Albany, and Pontotoc 234 PM CDT Wed Mar 31 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... ...FREEZE WARNING IN EFFECT FROM MIDNIGHT THURSDAY NIGHT TO 9 AM CDT FRIDAY... * WHAT...For tonight's Freeze Warning, sub-freezing temperatures as low as 32 are expected. For the second Freeze Warning, sub- freezing temperatures as low as 28 are expected. * WHERE...Portions of North Mississippi and East Arkansas. * WHEN...For the Freeze Warning, from 1 AM to 9 AM CDT Thursday. For the Freeze Warning, from midnight Thursday night to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ ARZ058-MSZ010-011-016-017-020>024-011200- /O.UPG.KMEG.FZ.A.0002.210402T0500Z-210402T1400Z/ /O.NEW.KMEG.FZ.W.0002.210402T0500Z-210402T1400Z/ /O.NEW.KMEG.FR.Y.0001.210401T0600Z-210401T1400Z/ Phillips-Coahoma-Quitman-Lee MS-Itawamba-Tallahatchie-Yalobusha- Calhoun-Chickasaw-Monroe- Including the cities of Helena, West Helena, Clarksdale, Marks, Tupelo, Fulton, Charleston, Water Valley, Coffeeville, Bruce, Calhoun City, Houston, Okolona, Amory, and Aberdeen 234 PM CDT Wed Mar 31 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM CDT THURSDAY... ...FREEZE WARNING IN EFFECT FROM MIDNIGHT THURSDAY NIGHT TO 9 AM CDT FRIDAY... * WHAT...For the Freeze Warning, sub-freezing temperatures as low as 29 are expected. For tonight's Frost Advisory, temperatures as low as 34 will result in frost formation. * WHERE...In Mississippi, Coahoma, Quitman, Lee MS, Itawamba, Tallahatchie, Yalobusha, Calhoun, Chickasaw and Monroe Counties. In Arkansas, Phillips County. * WHEN...For the Freeze Warning, from midnight Thursday night to 9 AM CDT Friday. For the Frost Advisory, from 1 AM to 9 AM CDT Thursday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ MJ
2 follow-up statements
234 WWUS74 KMEG 011025 NPWMEG URGENT - WEATHER MESSAGE National Weather Service Memphis TN 525 AM CDT Thu Apr 1 2021 ARZ009-018-026>028-035-036-048-049-MOZ113-115-MSZ001>009-012>015- TNZ001>004-019>022-048>055-088>092-011500- /O.CON.KMEG.FZ.W.0001.000000T0000Z-210401T1400Z/ /O.CON.KMEG.FZ.W.0002.210402T0500Z-210402T1400Z/ Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden- St. Francis-Lee AR-Dunklin-Pemiscot-DeSoto-Marshall-Benton MS- Tippah-Alcorn-Tishomingo-Tunica-Tate-Prentiss-Panola-Lafayette- Union-Pontotoc-Lake-Obion-Weakley-Henry-Dyer-Gibson-Carroll- Benton TN-Lauderdale-Tipton-Haywood-Crockett-Madison-Chester- Henderson-Decatur-Shelby-Fayette-Hardeman-McNairy-Hardin- Including the cities of Piggott, Corning, Paragould, Jonesboro, Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, Marianna, Kennett, Caruthersville, Southaven, Olive Branch, Holly Springs, Ashland, Ripley MS, Corinth, Iuka, Tunica, Senatobia, Booneville, Batesville, Oxford, New Albany, Pontotoc, Tiptonville, Union City, Martin, Dresden, Paris, Dyersburg, Humboldt, Milan, Huntingdon, Camden, Ripley TN, Covington, Brownsville, Alamo, Jackson, Henderson, Lexington, Parsons, Decaturville, Bartlett, Germantown, Collierville, Memphis, Millington, Somerville, Oakland, Bolivar, Selmer, and Savannah 525 AM CDT Thu Apr 1 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM CDT FRIDAY... * WHAT...For tonight's Freeze Warning, sub-freezing temperatures of 30 to 32 are expected. For the second Freeze Warning, sub- freezing temperatures as low as 27 are expected. * WHERE...In Tennessee, Shelby, Fayette, Hardeman, McNairy and Hardin Counties. In Arkansas, Cross and Crittenden Counties. * WHEN...For the Freeze Warning, from 1 AM to 9 AM CDT Thursday. For the Freeze Warning, from midnight Thursday night to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ ARZ058-MSZ010-011-016-017-020>024-011500- /O.CON.KMEG.FZ.W.0002.210402T0500Z-210402T1400Z/ /O.CON.KMEG.FR.Y.0001.000000T0000Z-210401T1400Z/ Phillips-Coahoma-Quitman-Lee MS-Itawamba-Tallahatchie-Yalobusha- Calhoun-Chickasaw-Monroe- Including the cities of Helena, West Helena, Clarksdale, Marks, Tupelo, Fulton, Charleston, Water Valley, Coffeeville, Bruce, Calhoun City, Houston, Okolona, Amory, and Aberdeen 525 AM CDT Thu Apr 1 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING... ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM CDT FRIDAY... * WHAT...For the Freeze Warning, sub-freezing temperatures as low as 29 are expected. For tonight's Frost Advisory, temperatures as low as 34 will result in frost formation. * WHERE...In Mississippi, Coahoma, Quitman, Lee MS, Itawamba, Tallahatchie, Yalobusha, Calhoun, Chickasaw and Monroe Counties. In Arkansas, Phillips County. * WHEN...For the Freeze Warning, from midnight Thursday night to 9 AM CDT Friday. For the Frost Advisory, from 1 AM to 9 AM CDT Thursday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ AC3
672 WWUS74 KMEG 011313 NPWMEG URGENT - WEATHER MESSAGE National Weather Service Memphis TN 813 AM CDT Thu Apr 1 2021 ARZ009-018-026>028-035-036-048-049-MOZ113-115-MSZ001>009-012>015- TNZ001>004-019>022-048>055-088>092-021015- /O.CAN.KMEG.FZ.W.0001.000000T0000Z-210401T1400Z/ /O.CON.KMEG.FZ.W.0002.210402T0500Z-210402T1400Z/ Clay-Greene-Craighead-Poinsett-Mississippi-Cross-Crittenden- St. Francis-Lee AR-Dunklin-Pemiscot-DeSoto-Marshall-Benton MS- Tippah-Alcorn-Tishomingo-Tunica-Tate-Prentiss-Panola-Lafayette- Union-Pontotoc-Lake-Obion-Weakley-Henry-Dyer-Gibson-Carroll- Benton TN-Lauderdale-Tipton-Haywood-Crockett-Madison-Chester- Henderson-Decatur-Shelby-Fayette-Hardeman-McNairy-Hardin- Including the cities of Piggott, Corning, Paragould, Jonesboro, Harrisburg, Blytheville, Wynne, West Memphis, Forrest City, Marianna, Kennett, Caruthersville, Southaven, Olive Branch, Holly Springs, Ashland, Ripley MS, Corinth, Iuka, Tunica, Senatobia, Booneville, Batesville, Oxford, New Albany, Pontotoc, Tiptonville, Union City, Martin, Dresden, Paris, Dyersburg, Humboldt, Milan, Huntingdon, Camden, Ripley TN, Covington, Brownsville, Alamo, Jackson, Henderson, Lexington, Parsons, Decaturville, Bartlett, Germantown, Collierville, Memphis, Millington, Somerville, Oakland, Bolivar, Selmer, and Savannah 813 AM CDT Thu Apr 1 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM CDT FRIDAY... ...FREEZE WARNING IS CANCELLED... * WHAT...For tonight's Freeze Warning, sub- freezing temperatures as low as 27 are expected. * WHERE...Portions of North Mississippi, West Tennessee, East Arkansas and Southeast Missouri. * WHEN...From midnight tonight to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ ARZ058-MSZ010-011-016-017-020>024-021015- /O.CAN.KMEG.FR.Y.0001.000000T0000Z-210401T1400Z/ /O.CON.KMEG.FZ.W.0002.210402T0500Z-210402T1400Z/ Phillips-Coahoma-Quitman-Lee MS-Itawamba-Tallahatchie-Yalobusha- Calhoun-Chickasaw-Monroe- Including the cities of Helena, West Helena, Clarksdale, Marks, Tupelo, Fulton, Charleston, Water Valley, Coffeeville, Bruce, Calhoun City, Houston, Okolona, Amory, and Aberdeen 813 AM CDT Thu Apr 1 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM CDT FRIDAY... ...FROST ADVISORY IS CANCELLED... * WHAT...For the Freeze Warning, sub-freezing temperatures as low as 29 are expected. * WHERE...In Mississippi, Quitman, Calhoun, Chickasaw, Tallahatchie, Yalobusha, Monroe, Coahoma, Itawamba and Lee MS Counties. In Arkansas, Phillips County. * WHEN...From midnight tonight to 9 AM CDT Friday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$
The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 7:50 PM CDT | Areal Flood Advisory | MEG | DeSoto, Tunica | 3 hr |
| Mar 30, 7:56 PM CDT | Flash Flood Warning | MEG | DeSoto | 3 hr |
| Mar 30, 9:30 PM CDT | Severe Thunderstorm Warning | MEG | Benton, Marshall | 45 min |
| Mar 30, 9:54 PM CDT | Flash Flood Warning | MEG | Benton, DeSoto, Marshall, Tate, Tunica | 3 hr |
| Mar 30, 11:40 PM CDT | Severe Thunderstorm Warning | MEG | Calhoun, Chickasaw | 50 min |
| Mar 31, 12:17 AM CDT | Tornado Warning | MEG | Calhoun, Chickasaw | 28 min |
| Mar 31, 12:27 AM CDT | Flash Flood Warning | MEG | Calhoun, Chickasaw, Monroe, Pontotoc, Yalobusha | 3 hr |
| Mar 31, 12:41 AM CDT | Severe Thunderstorm Warning | MEG | Chickasaw, Lee, Monroe | 49 min |
| Mar 31, 12:52 AM CDT | Tornado Warning | MEG | Chickasaw, Lee, Monroe | 10 min |
| Mar 31, 1:01 AM CDT | Severe Thunderstorm Warning | MEG | Monroe | 14 min |
| Mar 31, 1:24 AM CDT | Severe Thunderstorm Warning | MEG | Itawamba, Monroe | 51 min |
| Mar 31, 1:53 AM CDT | Tornado Warning | MEG | Monroe | 22 min |
| Mar 31, 2:24 AM CDT | Flash Flood Warning | MEG | Monroe | 3 hr |
| Mar 31, 3:16 AM CDT | Special Weather Statement | MEG | Coahoma | 29 min |
| Mar 31, 3:26 AM CDT | Special Weather Statement | MEG | Panola | 34 min |
| Mar 31, 3:46 AM CDT | Areal Flood Warning | MEG | Chickasaw | 108 min |
| Mar 31, 3:49 AM CDT | Severe Thunderstorm Warning | MEG | Lafayette, Marshall, Panola | 41 min |
| Mar 31, 4:12 AM CDT | Special Weather Statement | MEG | Yalobusha | 33 min |
| Mar 31, 4:30 AM CDT | Special Weather Statement | MEG | Union | 45 min |
| Mar 31, 4:43 AM CDT | Special Weather Statement | MEG | Calhoun, Pontotoc | 32 min |
| Mar 31, 5:02 AM CDT | Special Weather Statement | MEG | Tallahatchie | 13 min |
| Mar 31, 5:05 AM CDT | Special Weather Statement | MEG | Lee | 25 min |
| Mar 31, 5:17 AM CDT | Special Weather Statement | MEG | Chickasaw | 28 min |
| Mar 31, 5:19 AM CDT | Special Weather Statement | MEG | Chickasaw | 26 min |
| Mar 31, 5:20 AM CDT | Flash Flood Warning | MEG | Calhoun, Chickasaw, Yalobusha | 3 hr |
| Mar 31, 5:26 AM CDT | Flash Flood Warning | MEG | Chickasaw | 4 hr |
| Mar 31, 5:31 AM CDT | Freeze Watch | MEG | Alcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more | 9 hr |
| Mar 31, 5:31 AM CDT | Freeze Warning | MEG | Alcorn, Benton, DeSoto, Lafayette, Marshall, Panola and 7 more | 27 hr |
| Mar 31, 5:32 AM CDT | Flash Flood Warning | MEG | Monroe | 3 hr |
| Mar 31, 5:33 AM CDT | Special Weather Statement | MEG | Itawamba, Lee | 42 min |
| Mar 31, 5:44 AM CDT | Special Weather Statement | MEG | Monroe | 31 min |
| Mar 31, 6:06 AM CDT | Special Weather Statement | MEG | Monroe | 39 min |
| Mar 31, 8:28 AM CDT | Areal Flood Warning | MEG | Alcorn, Tishomingo | 3 hr |
| Mar 31, 8:54 AM CDT | Areal Flood Warning | MEG | Calhoun, Chickasaw, Yalobusha | 3 hr |
| Mar 31, 9:01 AM CDT | Areal Flood Warning | MEG | Chickasaw, Itawamba, Lee, Monroe | 3 hr |
| Mar 31, 9:01 AM CDT | Areal Flood Warning | MEG | Chickasaw | 14 min |
| Mar 31, 9:05 AM CDT | River Flood Warning | MEG | Calhoun | 23 hr |
| Mar 31, 9:19 AM CDT | River Flood Warning | MEG | Lafayette, Marshall, Union | 22 hr |
| Mar 31, 9:19 AM CDT | River Flood Warning | MEG | Tate, Tunica | 19 hr |
| Mar 31, 9:19 AM CDT | River Flood Warning | MEG | Quitman | 4 days |
| Mar 31, 9:20 AM CDT | Areal Flood Warning | MEG | Chickasaw, Monroe | 3 hr |
| Mar 31, 2:34 PM CDT | Freeze Warning | MEG | Alcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more | 42 hr |
| Mar 31, 5:31 AM CDT | Freeze Watch | MEG | Crittenden, Cross | 9 hr |
Nearby
Frost Advisories in Mississippi, 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.