Alert archive / Iowa / Wind Chill Watches in 2021
Wind Chill Watch 1, NWS Des Moines, IA
NWS Des Moines, IA issued this wind chill watch at Feb 12, 2021, 2:59 PM CST for 32 counties in Iowa. It took effect at Feb 13, 2021, 9:00 PM CST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Feb 12, 2021, 2:59 PM CST (20:59 UTC)
- In effect from
- Feb 13, 2021, 9:00 PM CST
- Expired
- Feb 13, 2021, 3:52 AM CST
- In force
- Issued by
- NWS Des Moines, IA
All 32 counties
Adair County, IA, Audubon County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Crawford County, IA, Dallas County, IA, Emmet County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Kossuth County, IA, Marshall County, IA, Palo Alto County, IA, Pocahontas County, IA, Sac County, IA, Story County, IA, Tama County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 80 km from the middle of the area, began a volume at 20:57 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
Omaha, NE (KOAX), launched 12:00Z, 9.0 hours before the alert went out and 239 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
- 742 m above ground
- 0-6 km bulk shear
- 82 kt
- 0-1 km storm-relative helicity
- -143 m²/s²
- 0-3 km storm-relative helicity
- -29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
705 WWUS43 KDMX 122059 WSWDMX URGENT - WINTER WEATHER MESSAGE National Weather Service Des Moines IA 259 PM CST Fri Feb 12 2021 ...Dangerous Cold To Continue And Intensify Even Further... .Hazardous cold levels will persist tonight and Saturday morning, then intensify to even more dangerously cold levels from Saturday night into early next week. IAZ004-005-015-023-024-033-034-130500- /O.NEW.KDMX.WC.A.0001.210214T0300Z-210215T1800Z/ /O.EXA.KDMX.WC.Y.0006.210213T0600Z-210213T1800Z/ Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Sac-Calhoun- Including the cities of Estherville, Algona, Emmetsburg, Pocahontas, Laurens, Rolfe, Fonda, Gilmore City, Humboldt, Sac City, Lake View, Odebolt, Wall Lake, Schaller, Early, Rockwell City, Manson, Lake City, and Pomeroy 259 PM CST Fri Feb 12 2021 ...WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO NOON CST SATURDAY... ...WIND CHILL WATCH IN EFFECT FROM SATURDAY EVENING THROUGH MONDAY MORNING... * WHAT...For the Wind Chill Advisory, very cold wind chills as low as 25 below zero. For the Wind Chill Watch, dangerously cold wind chills of 30 to 45 below zero. * WHERE...Much of northern and western Iowa. * WHEN...For the Wind Chill Advisory, from midnight tonight to noon CST Saturday. For the Wind Chill Watch, from Saturday evening through Monday morning. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. * ADDITIONAL DETAILS...After a week of bitter and hazardous cold weather, conditions will worsen even further from Saturday night through early next week, with multiple days seeing wind chills falling to -30 or lower and daytime temperatures remaining below zero. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Monitor the latest forecasts for updates on this situation. && $$ IAZ006-007-016-017-025>028-037>039-049-050-130500- /O.NEW.KDMX.WC.A.0001.210214T0300Z-210215T1800Z/ /O.CON.KDMX.WC.Y.0005.000000T0000Z-210213T1800Z/ Winnebago-Worth-Hancock-Cerro Gordo-Wright-Franklin-Butler-Bremer- Hardin-Grundy-Black Hawk-Marshall-Tama- Including the cities of Forest City, Lake Mills, Northwood, Manly, Garner, Britt, Kanawha, Mason City, Clear Lake, Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison, Dumont, Waverly, Iowa Falls, Eldora, Ackley, Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, Cedar Falls, Marshalltown, Tama, Toledo, Traer, Dysart, and Gladbrook 259 PM CST Fri Feb 12 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY... ...WIND CHILL WATCH IN EFFECT FROM SATURDAY EVENING THROUGH MONDAY MORNING... * WHAT...For the Wind Chill Advisory, very cold wind chills as low as 25 below zero. For the Wind Chill Watch, dangerously cold wind chills of 30 to 40 below zero. * WHERE...Much of northern into east central Iowa. * WHEN...For the Wind Chill Advisory, until noon CST Saturday. For the Wind Chill Watch, from Saturday evening through Monday morning. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. * ADDITIONAL DETAILS...After a week of bitter and hazardous cold weather, conditions will worsen even further from Saturday night through early next week, with multiple days seeing wind chills falling to -30 or lower and daytime temperatures remaining below zero. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Monitor the latest forecasts for updates on this situation. && $$ IAZ035-036-044>048-057>059-070-071-130500- /O.NEW.KDMX.WC.A.0001.210214T0300Z-210215T1800Z/ /O.CON.KDMX.WC.Y.0006.210213T0600Z-210213T1800Z/ Webster-Hamilton-Crawford-Carroll-Greene-Boone-Story-Audubon- Guthrie-Dallas-Cass-Adair- Including the cities of Fort Dodge, Webster City, Denison, Carroll, Jefferson, Boone, Ames, Audubon, Exira, Guthrie Center, Panora, Bayard, Casey, Perry, Waukee, Adel, Atlantic, Greenfield, Stuart, Adair, and Fontanelle 259 PM CST Fri Feb 12 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO NOON CST SATURDAY... ...WIND CHILL WATCH IN EFFECT FROM SATURDAY EVENING THROUGH MONDAY MORNING... * WHAT...For the Wind Chill Advisory, very cold wind chills as low as 25 below zero. For the Wind Chill Watch, dangerously cold wind chills of 30 to 40 below zero. * WHERE...Much of northwestern into central Iowa. * WHEN...For the Wind Chill Advisory, from midnight tonight to noon CST Saturday. For the Wind Chill Watch, from Saturday evening through Monday morning. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. * ADDITIONAL DETAILS...After a week of bitter and hazardous cold weather, conditions will worsen even further from Saturday night through early next week, with multiple days seeing wind chills falling to -30 or lower and daytime temperatures remaining below zero. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Monitor the latest forecasts for updates on this situation. && $$ IAZ062-130500- /O.CON.KDMX.WC.Y.0005.000000T0000Z-210213T1800Z/ Poweshiek- Including the city of Grinnell 259 PM CST Fri Feb 12 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY... * WHAT...Very cold wind chills as low as 25 below zero. * WHERE...Portions of eastern Iowa. * WHEN...Until noon CST Saturday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ IAZ060-061-072>075-081>086-092>097-130500- /O.CON.KDMX.WC.Y.0006.210213T0600Z-210213T1800Z/ Polk-Jasper-Madison-Warren-Marion-Mahaska-Adams-Union-Clarke- Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-Appanoose- Davis- Including the cities of Des Moines, Newton, Winterset, Earlham, Indianola, Norwalk, Carlisle, Pella, Knoxville, Oskaloosa, Corning, Creston, Osceola, Chariton, Albia, Ottumwa, Bedford, Lenox, New Market, Mount Ayr, Lamoni, Leon, Corydon, Seymour, Allerton, Humeston, Centerville, and Bloomfield 259 PM CST Fri Feb 12 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO NOON CST SATURDAY... * WHAT...Very cold wind chills as low as 25 below zero. * WHERE...Central and southern Iowa. * WHEN...From midnight tonight to noon CST Saturday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ For more information from the National Weather Service visit https://weather.gov/desmoines
2 follow-up statements
997 WWUS43 KDMX 130237 WSWDMX URGENT - WINTER WEATHER MESSAGE National Weather Service Des Moines IA 837 PM CST Fri Feb 12 2021 ...Dangerous Cold To Continue And Intensify Even Further... .Hazardous cold levels will persist tonight and Saturday morning, then intensify to even more dangerously cold levels from Saturday night into early next week. IAZ006-007-016-017-025>028-037>039-049-050-131045- /O.CON.KDMX.WC.Y.0005.000000T0000Z-210213T1800Z/ /O.CON.KDMX.WC.A.0001.210214T0300Z-210215T1800Z/ Winnebago-Worth-Hancock-Cerro Gordo-Wright-Franklin-Butler-Bremer- Hardin-Grundy-Black Hawk-Marshall-Tama- Including the cities of Forest City, Lake Mills, Northwood, Manly, Garner, Britt, Kanawha, Mason City, Clear Lake, Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison, Dumont, Waverly, Iowa Falls, Eldora, Ackley, Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, Cedar Falls, Marshalltown, Tama, Toledo, Traer, Dysart, and Gladbrook 837 PM CST Fri Feb 12 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY... ...WIND CHILL WATCH REMAINS IN EFFECT FROM SATURDAY EVENING THROUGH MONDAY MORNING... * WHAT...For the Wind Chill Advisory, very cold wind chills as low as 25 below zero. For the Wind Chill Watch, dangerously cold wind chills of 30 to 40 below zero. * WHERE...Much of northern into east central Iowa. * WHEN...For the Wind Chill Advisory, until noon CST Saturday. For the Wind Chill Watch, from Saturday evening through Monday morning. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Monitor the latest forecasts for updates on this situation. && $$ IAZ004-005-015-023-024-033>036-044>048-057>059-070-071-131045- /O.CON.KDMX.WC.Y.0006.210213T0600Z-210213T1800Z/ /O.CON.KDMX.WC.A.0001.210214T0300Z-210215T1800Z/ Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Sac-Calhoun-Webster- Hamilton-Crawford-Carroll-Greene-Boone-Story-Audubon-Guthrie- Dallas-Cass-Adair- Including the cities of Estherville, Algona, Emmetsburg, Pocahontas, Laurens, Rolfe, Fonda, Gilmore City, Humboldt, Sac City, Lake View, Odebolt, Wall Lake, Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, Fort Dodge, Webster City, Denison, Carroll, Jefferson, Boone, Ames, Audubon, Exira, Guthrie Center, Panora, Bayard, Casey, Perry, Waukee, Adel, Atlantic, Greenfield, Stuart, Adair, and Fontanelle 837 PM CST Fri Feb 12 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO NOON CST SATURDAY... ...WIND CHILL WATCH REMAINS IN EFFECT FROM SATURDAY EVENING THROUGH MONDAY MORNING... * WHAT...For the Wind Chill Advisory, very cold wind chills as low as 25 below zero. For the Wind Chill Watch, dangerously cold wind chills of 30 to 40 below zero. * WHERE...Much of northwestern into central Iowa. * WHEN...For the Wind Chill Advisory, from midnight tonight to noon CST Saturday. For the Wind Chill Watch, from Saturday evening through Monday morning. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Monitor the latest forecasts for updates on this situation. && $$ IAZ062-131045- /O.CON.KDMX.WC.Y.0005.000000T0000Z-210213T1800Z/ Poweshiek- Including the city of Grinnell 837 PM CST Fri Feb 12 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST SATURDAY... * WHAT...Very cold wind chills as low as 25 below zero. * WHERE...Portions of eastern Iowa. * WHEN...Until noon CST Saturday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ IAZ060-061-072>075-081>086-092>097-131045- /O.CON.KDMX.WC.Y.0006.210213T0600Z-210213T1800Z/ Polk-Jasper-Madison-Warren-Marion-Mahaska-Adams-Union-Clarke- Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-Appanoose- Davis- Including the cities of Des Moines, Newton, Winterset, Earlham, Indianola, Norwalk, Carlisle, Pella, Knoxville, Oskaloosa, Corning, Creston, Osceola, Chariton, Albia, Ottumwa, Bedford, Lenox, New Market, Mount Ayr, Lamoni, Leon, Corydon, Seymour, Allerton, Humeston, Centerville, and Bloomfield 837 PM CST Fri Feb 12 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO NOON CST SATURDAY... * WHAT...Very cold wind chills as low as 25 below zero. * WHERE...Central and southern Iowa. * WHEN...From midnight tonight to noon CST Saturday. * IMPACTS...The cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ For more information from the National Weather Service visit https://weather.gov/desmoines
241 WWUS43 KDMX 130952 WSWDMX URGENT - WINTER WEATHER MESSAGE National Weather Service Des Moines IA 352 AM CST Sat Feb 13 2021 ...Dangerous Cold To Continue And Intensify Even Further... .Hazardous cold levels will continue this morning, then intensify to even more dangerously cold levels from Saturday night into early next week. IAZ004-005-015-023-024-033>036-044>048-057>059-070-071-131800- /O.UPG.KDMX.WC.A.0001.210214T0300Z-210215T1800Z/ /O.NEW.KDMX.WC.W.0002.210214T0300Z-210215T1800Z/ /O.CON.KDMX.WC.Y.0006.000000T0000Z-210213T1800Z/ Emmet-Kossuth-Palo Alto-Pocahontas-Humboldt-Sac-Calhoun-Webster- Hamilton-Crawford-Carroll-Greene-Boone-Story-Audubon-Guthrie- Dallas-Cass-Adair- Including the cities of Estherville, Algona, Emmetsburg, Pocahontas, Laurens, Rolfe, Fonda, Gilmore City, Humboldt, Sac City, Lake View, Odebolt, Wall Lake, Schaller, Early, Rockwell City, Manson, Lake City, Pomeroy, Fort Dodge, Webster City, Denison, Carroll, Jefferson, Boone, Ames, Audubon, Exira, Guthrie Center, Panora, Bayard, Casey, Perry, Waukee, Adel, Atlantic, Greenfield, Stuart, Adair, and Fontanelle 352 AM CST Sat Feb 13 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... ...WIND CHILL WARNING IN EFFECT FROM 9 PM THIS EVENING TO NOON CST MONDAY... * WHAT...For the Wind Chill Warning, dangerously cold wind chills expected. Wind chills as low as 40 below zero. For the Wind Chill Advisory, very cold wind chills. Wind chills as low as 25 below zero. * WHERE...Much of northern and central Iowa. * WHEN...For the Wind Chill Warning, from 9 PM this evening to noon CST Monday. For the Wind Chill Advisory, until noon CST today. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid outside activities if possible. When outside, make sure you wear appropriate clothing, a hat, and gloves. Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ IAZ006-007-016-017-025>028-037>039-049-050-131800- /O.UPG.KDMX.WC.A.0001.210214T0300Z-210215T1800Z/ /O.NEW.KDMX.WC.W.0002.210214T0300Z-210215T1800Z/ /O.CON.KDMX.WC.Y.0005.000000T0000Z-210213T1800Z/ Winnebago-Worth-Hancock-Cerro Gordo-Wright-Franklin-Butler-Bremer- Hardin-Grundy-Black Hawk-Marshall-Tama- Including the cities of Forest City, Lake Mills, Northwood, Manly, Garner, Britt, Kanawha, Mason City, Clear Lake, Eagle Grove, Clarion, Belmond, Hampton, Parkersburg, Clarksville, Shell Rock, Greene, Aplington, Allison, Dumont, Waverly, Iowa Falls, Eldora, Ackley, Grundy Center, Reinbeck, Conrad, Dike, Wellsburg, Waterloo, Cedar Falls, Marshalltown, Tama, Toledo, Traer, Dysart, and Gladbrook 352 AM CST Sat Feb 13 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... ...WIND CHILL WARNING IN EFFECT FROM 9 PM THIS EVENING TO NOON CST MONDAY... * WHAT...For the Wind Chill Warning, dangerously cold wind chills expected. Wind chills as low as 40 below zero. For the Wind Chill Advisory, very cold wind chills. Wind chills as low as 30 below zero. * WHERE...Much of central and eastern Iowa. * WHEN...For the Wind Chill Warning, from 9 PM this evening to noon CST Monday. For the Wind Chill Advisory, until noon CST today. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid outside activities if possible. When outside, make sure you wear appropriate clothing, a hat, and gloves. Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ IAZ060-061-072>075-081>086-092>097-131800- /O.NEW.KDMX.WC.W.0002.210214T0300Z-210215T1800Z/ /O.CON.KDMX.WC.Y.0006.000000T0000Z-210213T1800Z/ Polk-Jasper-Madison-Warren-Marion-Mahaska-Adams-Union-Clarke- Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-Appanoose- Davis- Including the cities of Des Moines, Newton, Winterset, Earlham, Indianola, Norwalk, Carlisle, Pella, Knoxville, Oskaloosa, Corning, Creston, Osceola, Chariton, Albia, Ottumwa, Bedford, Lenox, New Market, Mount Ayr, Lamoni, Leon, Corydon, Seymour, Allerton, Humeston, Centerville, and Bloomfield 352 AM CST Sat Feb 13 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... ...WIND CHILL WARNING IN EFFECT FROM 9 PM THIS EVENING TO NOON CST MONDAY... * WHAT...For the Wind Chill Warning, dangerously cold wind chills expected. Wind chills as low as 35 below zero. For the Wind Chill Advisory, very cold wind chills. Wind chills as low as 25 below zero. * WHERE...Much of central and southern Iowa. * WHEN...For the Wind Chill Warning, from 9 PM this evening to noon CST Monday. For the Wind Chill Advisory, until noon CST today. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid outside activities if possible. When outside, make sure you wear appropriate clothing, a hat, and gloves. Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ IAZ062-131800- /O.NEW.KDMX.WC.W.0002.210214T0300Z-210215T1800Z/ /O.CON.KDMX.WC.Y.0005.000000T0000Z-210213T1800Z/ Poweshiek- Including the city of Grinnell 352 AM CST Sat Feb 13 2021 ...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY... ...WIND CHILL WARNING IN EFFECT FROM 9 PM THIS EVENING TO NOON CST MONDAY... * WHAT...For the Wind Chill Warning, dangerously cold wind chills expected. Wind chills as low as 35 below zero. For the Wind Chill Advisory, very cold wind chills. Wind chills as low as 25 below zero. * WHERE...East Central Iowa. * WHEN...For the Wind Chill Warning, from 9 PM this evening to noon CST Monday. For the Wind Chill Advisory, until noon CST today. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 10 minutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid outside activities if possible. When outside, make sure you wear appropriate clothing, a hat, and gloves. Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. && $$ For more information from the National Weather Service visit https://weather.gov/desmoines
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 12, 4:04 AM CST | Wind Chill Advisory | DMX | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 31 more | 32 hr |
Nearby
Wind Chill Watches in Iowa, 2021Every wind chill watch 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.