Alert archive / Nebraska / Areal Flood Advisories in 2021
Areal Flood Advisory 21, NWS North Platte, NE
NWS North Platte, NE issued this areal flood advisory at Aug 19, 2021, 7:39 PM MDT for Keith County, Lincoln County, Perkins County, Nebraska. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 19, 2021, 7:39 PM MDT (01:39 UTC)
- Expired
- Aug 19, 2021, 10:45 PM MDT
- In force
- 3 hr
- Issued by
- NWS North Platte, NE
- Area
- Storm-based polygon
Counties Keith County, NE, Lincoln County, NE, Perkins County, NE
The radar
The North Platte radar (KLNX), 134 km from the middle of the area, began a volume at 01:43 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 00:00Z, 1.7 hours before the alert went out and 77 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
- 1368 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1220 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 10.2
The text
As transmitted.
450
WGUS83 KLBF 200139
FLSLBF
Flood Advisory
National Weather Service North Platte NE
739 PM MDT Thu Aug 19 2021
NEC101-111-135-200445-
/O.NEW.KLBF.FA.Y.0021.210820T0139Z-210820T0445Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Keith NE-Lincoln NE-Perkins NE-
739 PM MDT Thu Aug 19 2021 /839 PM CDT Thu Aug 19 2021/
The National Weather Service in North Platte has issued a
* Flood Advisory for...
Eastern Keith County in southwestern Nebraska...
Western Lincoln County in southwestern Nebraska...
Southeastern Perkins County in southwestern Nebraska...
* Until 1045 PM MDT /1145 PM CDT/.
* At 739 PM MDT /839 PM CDT/, Doppler radar indicated heavy rain due
to thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area. Between 1 and 2 inches of rain have
fallen.
* Some locations that will experience flooding include...
Grant, Paxton, Madrid, Elsie, Sarben, Nevens, Broganville,
Grainton and Big Bald Hill.
Additional rainfall amounts up to 1 inch are expected over the area.
This additional rain will result in minor flooding.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4082 10192 4092 10153 4102 10156 4139 10149
4139 10127 4125 10127 4105 10127 4100 10127
4090 10125 4080 10125 4070 10145 4070 10169
4071 10170
$$
RobergThe office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 6:02 PM MDT | Severe Thunderstorm Warning | LBF | Chase, Perkins | 43 min |
| Aug 19, 6:13 PM MDT | Flash Flood Warning | LBF | Keith | 3 hr |
| Aug 19, 6:32 PM MDT | Severe Thunderstorm Warning | LBF | Chase, Perkins | 43 min |
| Aug 19, 6:42 PM MDT | Severe Thunderstorm Warning | LBF | Chase, Perkins | 48 min |
| Aug 19, 6:50 PM MDT | Areal Flood Advisory | LBF | Arthur | 2 hr |
| Aug 19, 6:59 PM MDT | Areal Flood Advisory | LBF | Chase, Perkins | 2 hr |
| Aug 19, 7:13 PM MDT | Areal Flood Warning | LBF | Chase, Perkins | 24 hr |
| Aug 19, 7:42 PM MDT | Special Weather Statement | LBF | Perkins | 48 min |
| Aug 19, 8:14 PM MDT | Special Weather Statement | LBF | Chase | 46 min |
| Aug 19, 8:17 PM MDT | Severe Thunderstorm Warning | LBF | Chase, Hayes, Lincoln, Perkins | 43 min |
| Aug 19, 8:28 PM MDT | Special Weather Statement | LBF | Lincoln | 47 min |
| Aug 19, 8:40 PM MDT | Severe Thunderstorm Warning | LBF | Chase, Frontier, Hayes, Lincoln, Perkins | 50 min |
| Aug 19, 8:51 PM MDT | Areal Flood Advisory | LBF | Custer, Keith, Lincoln | 4 hr |
| Aug 19, 8:56 PM MDT | Severe Thunderstorm Warning | LBF | Lincoln | 49 min |
| Aug 19, 9:34 PM MDT | Special Weather Statement | LBF | Frontier, Hayes | 41 min |
| Aug 19, 9:41 PM MDT | Special Weather Statement | LBF | Dawson | 49 min |
| Aug 19, 10:22 PM MDT | Special Weather Statement | LBF | Custer | 38 min |
| Aug 19, 10:28 PM MDT | Special Weather Statement | LBF | Frontier | 47 min |
| Aug 19, 10:32 PM MDT | Special Weather Statement | LBF | Chase | 43 min |
| Aug 19, 11:15 PM MDT | Special Weather Statement | LBF | Chase | 45 min |
| Aug 19, 11:58 PM MDT | Special Weather Statement | LBF | Hayes | 47 min |
| Aug 20, 12:39 AM MDT | Areal Flood Warning | LBF | Chase, Hayes | 19 hr |
| Aug 20, 12:50 AM MDT | Areal Flood Advisory | LBF | Lincoln | 2 hr |
| Aug 20, 12:56 AM MDT | Special Weather Statement | LBF | Lincoln | 49 min |
| Aug 20, 2:12 AM MDT | Special Weather Statement | LBF | Custer | 48 min |
| Aug 20, 9:35 AM MDT | River Flood Advisory | LBF | Hayes | 10 hr |
| Aug 20, 1:40 PM MDT | River Flood Advisory | LBF | Lincoln | 24 hr |
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.