Alert archive / Nevada / Areal Flood Advisories in 2021
Areal Flood Advisory 21, NWS Reno, NV
NWS Reno, NV issued this areal flood advisory at Jul 30, 2021, 4:55 PM PDT for Douglas County, Nevada. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 30, 2021, 4:55 PM PDT (23:55 UTC)
- Expired
- Jul 30, 2021, 7:54 PM PDT
- In force
- 3 hr
- Issued by
- NWS Reno, NV
- Area
- Storm-based polygon
County Douglas County, NV
The radar
The Reno radar (KRGX), 96 km from the middle of the area, began a volume at 23:55 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
Reno, NV (KREV), launched 12:00Z, 11.9 hours before the alert went out and 140 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
- 2579 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
979
WGUS85 KREV 302355
FLSREV
Flood Advisory
National Weather Service Reno NV
455 PM PDT Fri Jul 30 2021
NVC005-310300-
/O.NEW.KREV.FA.Y.0021.210730T2355Z-210731T0300Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Douglas NV-
455 PM PDT Fri Jul 30 2021
The National Weather Service in Reno has issued a
* Urban and Small Stream Flood Advisory for...
Douglas County in western Nevada...
* Until 800 PM PDT.
* At 455 PM PDT, Doppler radar indicated heavy rain due to
thunderstorms. This may result in urban and small stream flooding.
* Some locations that will experience flooding include...
Mount Siegel.
Pinenut Creek Watershed
PRECAUTIONARY/PREPAREDNESS ACTIONS...
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
Move away from recently burned areas. Life-threatening flooding of
creeks, roads, and normally dry stream beds is likely. The heavy
rains will likely trigger rockslides, mudslides and debris flows in
steep terrain, especially in and around these areas.
&&
LAT...LON 3889 11962 3890 11962 3891 11960 3891 11958
3891 11956 3890 11951 3889 11950 3888 11953
3889 11955 3889 11957 3887 11959 3888 11960
3889 11960
$$
EW1 follow-up statement
537
WGUS85 KREV 310254
FLSREV
Flood Advisory
National Weather Service Reno NV
754 PM PDT Fri Jul 30 2021
NVC005-310304-
/O.CAN.KREV.FA.Y.0021.000000T0000Z-210731T0300Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Douglas NV-
754 PM PDT Fri Jul 30 2021
...THE URBAN AND SMALL STREAM FLOOD ADVISORY FOR DOUGLAS COUNTY HAS
BEEN REPLACED WITH A FLASH FLOOD WARNING...
The heavy rain has ended. However, minor debris flows may be
ongoing. It is best to stay away from the Numbers fire burn scar.
Any additional rainfall this evening could cause further issues for
the burn area.
LAT...LON 3889 11962 3890 11962 3891 11960 3891 11958
3891 11956 3890 11951 3889 11950 3888 11953
3889 11955 3889 11957 3887 11959 3888 11960
3889 11960
$$
EWThe office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 1:10 PM PDT | Special Weather Statement | REV | Churchill, Douglas, Lyon, Mineral, Pershing, Storey and 1 more | 80 min |
Nearby
Areal Flood Advisories in Nevada, 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.