Alert archive / Arizona / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 50, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 17, 2026, 3:05 PM MST for Pima County, Arizona. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 17, 2026, 3:05 PM MST (22:05 UTC)
- Expired
- Jul 17, 2026, 3:36 PM MST
- In force
- 31 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Pima County, AZ
The radar
The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 22:09 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
Phoenix, AZ (KPSR), launched 12:00Z, 10.1 hours before the alert went out and 149 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
- 57 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 1188 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 17, 2:55 PM MST, 10 minutes earlier.
Area forecast discussion, Jul 17, 2:55 PM MST, 10 minutes before
Area Forecast Discussion National Weather Service Tucson AZ 255 PM MST Fri Jul 17 2026 .SYNOPSIS...Scattered showers and thunderstorms into this evening with an elevated risk of flash flooding, especially across those areas that received heavy rainfall Thursday. Otherwise, chances for thunderstorms will continue into this weekend with possible uptick in activity next Monday and Tuesday. && .DISCUSSION...Not surprising that thunderstorm activity today has been much less than what occurred on Thursday. Atmosphere is a little worked over but is still rather moist that any thunderstorm will be capable of producing rain rates of >1"/hour leading to continued threat of localized flash flooding. Very low end severe threat with max gusts up to 45 mph. Activity will be diminishing later this evening with some model guidance indicating an area of showers/storms may develop overnight between Phoenix & Tucson. The upper low currently over west Texas will become a player in our forecast next week. This weekend: Afternoon/evening storm activity mainly east and south of Tucson. Monday and Tuesday: Uptick in daily activity as the above mentioned upper low that is currently over west Texas moves across the area in a weakened state. Wednesday and Friday: Daily chance of showers and thunderstorms continue. High temperatures will remain below normal thru Tuesday then warm up to above normal by the end of next week. && .AVIATION...Valid through 19/00Z. Widely scattered to scattered showers and thunderstorms will continue 18/07Z before slowly diminishing thru 18/13z. Heavy rain, mountain obscurations, and erratic strong wind gusts of 30-40 kts possible with any storm, with ceilings mainly 9k-12k feet. Outside of thunderstorms, surface winds generally under 10 kts. Chance of -SHRA/TS developing aft 18/19z. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER...Daily chances for thunderstorms will continue each afternoon and evening through the next 7 days with day to day variability. Minimum relative humidity 25-30 percent in the lower desert locations and above 40 percent in the mountains this week. Winds this week will remain mainly light and under 15 mph, though strong and erratic winds will be possible with any thunderstorm. && .TWC WATCHES/WARNINGS/ADVISORIES...None. && Visit us on Facebook, X, YouTube, and at weather.gov/Tucson
In the hours before
Local storm report, Jul 17, 9:29 AM MST, 5 hours 36 minutes before
Preliminary Local Storm Report
National Weather Service Tucson AZ
929 AM MST Fri Jul 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0513 PM Flash Flood 1 SW Rio Rico 31.47N 110.99W
07/16/2026 Santa Cruz AZ County Official
*** 2 FATAL ***
[Delayed report]: 2 deceased individuals
reported in the Santa Cruz River. Recovery
ongoing.
&&
KLMLocal storm report, Jul 17, 10:00 AM MST, 5 hours 5 minutes before
Preliminary Local Storm Report
National Weather Service Tucson AZ
1000 AM MST Fri Jul 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0900 AM Flood 4 S Santa Rosa 32.28N 112.06W
07/17/2026 Pima AZ Emergency Mngr
Washes running on Route 15.
&&
KLMLocal storm report, Jul 17, 10:16 AM MST, 4 hours 49 minutes before
Preliminary Local Storm Report
National Weather Service Tucson AZ
1016 AM MST Fri Jul 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0535 PM Flash Flood 14 NW Sells 32.03N 112.07W
07/16/2026 Pima AZ Emergency Mngr
[Delayed report] Several washes running
across HWY 86 between mile marker 99-106.
&&
KLMLocal storm report, Jul 17, 10:50 AM MST, 4 hours 15 minutes before
Preliminary Local Storm Report
National Weather Service Tucson AZ
1050 AM MST Fri Jul 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0630 PM Flash Flood 6 ENE Tombstone 31.74N 109.96W
07/16/2026 Cochise AZ Fire Dept/Rescue
[Delayed report] Wash flowing across Gleeson
Rd.
0630 PM Flash Flood 2 WSW Tombstone 31.71N 110.08W
07/16/2026 Cochise AZ Fire Dept/Rescue
[Delayed report] Wash flowing across
Charleston Rd.
&&Local storm report, Jul 17, 11:28 AM MST, 3 hours 37 minutes before
Preliminary Local Storm Report
National Weather Service Tucson AZ
1128 AM MST Fri Jul 17 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0400 PM Flash Flood 11 W Huachuca City 31.66N 110.53W
07/16/2026 Santa Cruz AZ Trained Spotter
[Delayed report] 4 to 6 inches of water
flowing across roadway near Rochelle and
Lower Elgin Rd.
&&
KLMThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 5:01 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Jul 16, 5:12 PM MST | Flash Flood Warning | TWC | Santa Cruz | 3 hr |
| Jul 16, 5:23 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Jul 16, 5:33 PM MST | Flash Flood Warning | TWC | Graham | 3 hr |
| Jul 16, 5:33 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Jul 16, 6:26 PM MST | Flash Flood Warning | TWC | Pima | 114 min |
| Jul 16, 6:31 PM MST | Dust Storm Advisory | TWC | Pinal | 74 min |
| Jul 16, 7:41 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Jul 16, 8:16 PM MST | Areal Flood Advisory | TWC | Pima | 4 hr |
| Jul 17, 8:53 AM MST | Areal Flood Advisory | TWC | Pima | 112 min |
| Jul 17, 1:51 PM MST | Flash Flood Warning | TWC | Pima | 2 hr |
| Jul 17, 2:57 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Jul 17, 3:04 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Jul 17, 4:54 PM MST | Areal Flood Advisory | TWC | Pinal | 66 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2026Every severe thunderstorm warning in 2026
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.