Alert archive / Arizona / Flash Flood Watches in 2018
Flash Flood Watch 1, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood watch at Jul 11, 2018, 11:16 AM MST for 6 counties in Arizona. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Jul 11, 2018, 11:16 AM MST (18:16 UTC)
- Expired
- Jul 11, 2018, 8:04 PM MST
- In force
- 9 hr
- Issued by
- NWS Tucson, AZ
- Flood severity
- None
Counties Cochise County, AZ, Graham County, AZ, Greenlee County, AZ, Pima County, AZ, Pinal County, AZ, Santa Cruz County, AZ
The radar
The Tucson radar (KEMX), 61 km from the middle of the area, began a volume at 18:17 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
Tuscon, AZ (KDMA), launched 12:00Z, 6.3 hours before the alert went out and 49 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
- 742 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1190 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tucson, AZ wrote its last area forecast discussion before this flash flood watch went out at Jul 11, 3:14 AM MST, 8 hours 2 minutes earlier.
Area forecast discussion, Jul 11, 3:14 AM MST, 8 hours 2 minutes before
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</html>The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 5:08 PM MST | Special Weather Statement | TWC | 37 min | |
| Jul 10, 6:27 PM MST | Areal Flood Advisory | TWC | Pima | 63 min |
| Jul 10, 7:14 PM MST | Areal Flood Advisory | TWC | Pima | 2 hr |
| Jul 10, 8:55 PM MST | Areal Flood Advisory | TWC | Pima | 4 hr |
| Jul 11, 1:46 AM MST | Areal Flood Advisory | TWC | Graham | 119 min |
| Jul 11, 12:39 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 26 min |
| Jul 11, 12:53 PM MST | Severe Thunderstorm Warning | TWC | Pima | 41 min |
| Jul 11, 1:19 PM MST | Areal Flood Advisory | TWC | Pima | 116 min |
| Jul 11, 1:28 PM MST | Special Weather Statement | TWC | Santa Cruz | 32 min |
Nearby
Flash Flood Watches in Arizona, 2018Every flash flood watch in 2018
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.