Alert archive / Nebraska / Areal Flood Advisories in 2021
Areal Flood Advisory 10, NWS North Platte, NE
NWS North Platte, NE issued this areal flood advisory at Jul 6, 2021, 12:57 PM CDT for Custer County, Nebraska. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jul 6, 2021, 12:57 PM CDT (17:57 UTC)
- Expired
- Jul 6, 2021, 4:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS North Platte, NE
- Area
- Storm-based polygon
County Custer County, NE
The radar
The North Platte radar (KLNX), 94 km from the middle of the area, began a volume at 18:00 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
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 6.0 hours before the alert went out and 79 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
- 688 J/kg
- Mixed-layer CIN
- -127 J/kg
- Mixed-layer LCL
- 1249 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS North Platte, NE wrote its last area forecast discussion before this areal flood advisory went out at Jul 6, 12:52 PM CDT, 5 minutes earlier.
Area forecast discussion, Jul 6, 12:52 PM CDT, 5 minutes before
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</html>Hazardous weather outlook, Jul 6, 11:06 AM CDT, 1 hour 51 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service North Platte NE 1106 AM CDT Tue Jul 6 2021 NEZ004>010-022>029-035>038-056>059-069>071-094-071615- Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden- Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson- Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier- Western Cherry- 1106 AM CDT Tue Jul 6 2021 /1006 AM MDT Tue Jul 6 2021/ This Hazardous Weather Outlook is for portions of western and north central Nebraska. .DAY ONE...THIS AFTERNOON AND TONIGHT. Scattered thunderstorms are possible into this evening mainly east of a line from Hayes Center through North Platte and Bassett. A few storms may become severe with large hail, damaging wind, and locally heavy rainfall the main threats. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. Additional thunderstorms will be possible Thursday through Saturday, with the strongest storms Friday into Friday night. At this time, the threat for widespread severe weather is low during this period. .SPOTTER INFORMATION STATEMENT... Please relay any information about observed severe weather to the NWS. && More information at www.weather.gov/northplatte
In the hours before
Special weather statement, Jul 6, 11:42 AM CDT, 1 hour 15 minutes before
Special Weather Statement National Weather Service North Platte NE 1142 AM CDT Tue Jul 6 2021 NEZ059-061715- Lincoln NE- 1142 AM CDT Tue Jul 6 2021 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL LINCOLN COUNTY UNTIL 1215 PM CDT... At 1142 AM CDT, Doppler radar was tracking a strong thunderstorm near Brady, or 21 miles north of Curtis, moving east at 30 mph. Nickel size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Vroman and Jeffrey Canyon State Wildlife Management Area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 4088 10052 4098 10057 4103 10023 4082 10022 TIME...MOT...LOC 1642Z 262DEG 28KT 4093 10039 Roberg
Special weather statement, Jul 6, 12:37 PM CDT, 20 minutes before
Special Weather Statement National Weather Service North Platte NE 1237 PM CDT Tue Jul 6 2021 NEZ038-061815- Custer NE- 1237 PM CDT Tue Jul 6 2021 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CUSTER COUNTY UNTIL 115 PM CDT... At 1236 PM CDT, Doppler radar was tracking a strong thunderstorm over Callaway, or 16 miles southwest of Broken Bow, moving southeast at 20 mph. Nickel size hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Callaway, Lodi and Pressey State Wildlife Management Area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 4127 10003 4137 9996 4131 9962 4113 9970 TIME...MOT...LOC 1736Z 293DEG 18KT 4130 9993 Roberg
Special weather statement, Jul 6, 12:47 PM CDT, 10 minutes before
Special Weather Statement National Weather Service North Platte NE 1247 PM CDT Tue Jul 6 2021 NEZ038-061830- Custer NE- 1247 PM CDT Tue Jul 6 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CUSTER COUNTY UNTIL 130 PM CDT... At 1246 PM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Sargent to 10 miles southwest of Broken Bow. Movement was southeast at 20 mph. Nickel size hail and wind gusts up to 50 mph will be possible with these storms. Locations impacted include... Broken Bow, Sargent, Berwyn, Weissert, Westerville, Round Valley and Wescott. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with these storms, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with these storms. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 4149 9922 4129 9958 4138 9993 4167 9936 TIME...MOT...LOC 1746Z 279DEG 15KT 4157 9935 4134 9977 Roberg
The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 8:21 PM CDT | Special Weather Statement | LBF | Sheridan | 39 min |
| Jul 6, 11:42 AM CDT | Special Weather Statement | LBF | Lincoln | 33 min |
| Jul 6, 12:37 PM CDT | Special Weather Statement | LBF | Custer | 38 min |
| Jul 6, 12:47 PM CDT | Special Weather Statement | LBF | Custer | 43 min |
| Jul 6, 1:42 PM CDT | Areal Flood Advisory | LBF | Custer, Garfield, Wheeler | 3 hr |
| Jul 6, 2:01 PM CDT | Areal Flood Warning | LBF | Custer | 3 hr |
| Jul 6, 6:23 PM CDT | Special Weather Statement | LBF | Frontier | 37 min |
Nearby
Areal Flood Advisories in Nebraska, 2021Every areal flood 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.