Alert archive / Arizona / Flash Flood Warnings in 2026
Flash Flood Warning 84, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 27, 2026, 10:31 PM MST for Cochise County, Arizona. It was in force for 2 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 27, 2026, 10:31 PM MST (05:31 UTC)
- Expired
- Jul 28, 2026, 12:47 AM MST
- In force
- 2 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Cochise County, AZ
The radar
The Tucson radar (KEMX), 60 km from the middle of the area, began a volume at 05:31 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 27, 10:33 PM MST | RAIN 3 | 12 Se Sierra Vista, AZ | Trained Spotter reported 3 inches over the past hour ending at 1030 PM MST. |
| Jul 27, 11:15 PM MST | FLASH FLOOD | 11 Se Sierra Vista, AZ | Delayed report. Report of stranded vehicle in flood water with driver trapped inside. Road washed out. Water up to knee height. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this flash flood warning; the first came 44 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Santa Teresa, NM (KEPZ), launched 00:00Z, 5.5 hours before the alert went out and 348 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
- 34 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 4010 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- -30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
451
WGUS55 KTWC 280531
FFWTWC
AZC003-280830-
/O.NEW.KTWC.FF.W.0084.260728T0531Z-260728T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tucson AZ
1031 PM MST Mon Jul 27 2026
The National Weather Service in Tucson has issued a
* Flash Flood Warning for...
Southwestern Cochise County in southeastern Arizona...
* Until 130 AM MST.
* At 1031 PM MST, Doppler radar indicated thunderstorms producing
between 1 and 3 inches of heavy rain across southwest Cochise
county. A trained weather spotter in Hereford reported 3 inches had
fallen in the last hour. Flash flooding is ongoing or expected to
begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar indicated.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Sierra Vista, Hereford, Fort Huachuca, Parker Canyon Lake, Ramsey
Canyon Preserve and Coronado National Memorial.
This includes the following highways...
Route 92 between mile markers 323 and 336. Route 83 between mile
markers 3 and 6.
This includes the following Flash Flood Prone Locations...
Moson Rd from HWY 90 and Hereford Rd.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3133 11046 3155 11045 3152 11015 3133 11018
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CWR1 follow-up statement
348 WGUS75 KTWC 280747 FFSTWC Flash Flood Statement National Weather Service Tucson AZ 1247 AM MST Tue Jul 28 2026 AZC003-280757- /O.CAN.KTWC.FF.W.0084.000000T0000Z-260728T0830Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Cochise AZ- 1247 AM MST Tue Jul 28 2026 ...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN COCHISE COUNTY... Flash flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. A Flood Watch remains in effect until 500 AM MST for a portion of Southeast Arizona. && LAT...LON 3133 11018 3152 11015 3155 11045 3133 11046 $$ CWR
What forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Jul 27, 12:30 PM MST, 10 hours 1 minute earlier.
Area forecast discussion, Jul 27, 12:30 PM MST, 10 hours 1 minute before
Area Forecast Discussion National Weather Service Tucson AZ 1230 PM MST Mon Jul 27 2026 .SYNOPSIS... Expect daily afternoon and evening showers and thunderstorms this week with day to day variability in coverage and strength. High temperatures will be 2-6 degrees above normal through the middle of this week then warm to 7-12 degrees above normal late this week into next weekend. && .DISCUSSION... Cumulus and towering cumulus are beginning to form along the terrain. Suitable moisture is in place with satellite derived PWATs around 1.0 to 1.75 inches, higher values Sells westward. High pressure overhead is centered over New Mexico and western TX today leading to southeast flow in the mid levels helping to pull moisture in from the Gulf of California. As surface heating continues today and low level drying occurs, an inverted V sounding will develop leading to DCAPE values around 1500 to 1700 J/kg. There will be a fair bit of mid-level shear as well, 25 to 35 kts, with decent updraft helicity thus there is the potential for strong, longer- lived storms to develop. Storms today will be focused to the Arizona/ Mexico international border and the Arizona/ New Mexico border. Stronger storms more likely be located along the Arizona/ Mexico international border. CAMs continue to have storms beginning to develop between 12 and 2 pm, initially on the higher terrain then moving west to northwest. Tomorrow, most of the ingredients seen today will be present. Mid level shear will remain elevated at 25 to 35 kts, DCAPE of 1500-1800 J/kg, and PWATs between 1.0 to 1.6 inches. Storms again will be focused to the Arizona/ Mexico international border and the the Arizona/ New Mexico border. Wednesday, chances for storms and showers begin to diminish as the high pressure center begins to move westward. By Thursday, high temperatures will be 7 to 12 degrees above normal leading to Major to Extreme HeatRisk. Therefore, an Extreme Heat Warning has been issued for most of southern Arizona (with the exception of the higher terrain) from Thursday morning through Sunday evening. At this level of HeatRisk, everyone should take proper precautions to prepare for the heat as anyone is at risk for heat related illnesses if not staying hydrated or cool. Friday and Saturday look to be the hottest days in the forecast during this stretch, with a 55% to 65% chance of 110 degrees for locales Tucson westward both days. Chances for storms and showers returns early next week as the center of high pressure oscillates eastward. && .AVIATION...Valid though 30/00Z FEW to SCT clouds AOA 10-12k ft AGL KTUS eastward becoming SCT to BKN 8-12k ft AGL aft 28/00Z. Isold to sct TSRA will be possible south and east of KTUS starting around 27/20Z through 28/04Z. KDUG and KOLS terminals will be most at risk of being impacted by TSRA. Any thunderstorm may produce wind gusts in excess of 40 kts. Outside of storms surface winds variable less than 8 kts this morning becoming NWLY 6-10 kts with occasional gusts this afternoon and evening. Aviation discussion not updated for TAF amendments. && .FIRE WEATHER... High temperatures will remain above normal this week. Expect daily chances of afternoon and evening showers and thunderstorms with day-to-day variability on coverage of storms. Any thunderstorm will bring a threat of severe, erratic wind gusts as well as brief heavy rainfall and an isolated threat of flash flooding. Minimum relative humidity values will be 20-40 percent in the lower deserts through at least mid-week. Winds this weekend will mainly be light and under 12 mph outside of thunderstorms. && .TWC WATCHES/WARNINGS/ADVISORIES... Extreme Heat Warning from 8 PM Saturday to 8 PM MST Sunday for AZZ501>509. && Malarkey Visit us on Facebook, X, YouTube, and at weather.gov/Tucson
In the hours before
Local storm report, Jul 27, 9:57 PM MST, 34 minutes before
Preliminary Local Storm Report
National Weather Service Tucson AZ
957 PM MST Mon Jul 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0933 PM Tstm Wnd Gst 3 N Bisbee 31.44N 109.91W
07/27/2026 M61 MPH Cochise AZ Mesonet
Mesonet station CW7706 Bisbee.
&&
DVSLocal storm report, Jul 27, 10:05 PM MST, 26 minutes before
Preliminary Local Storm Report
National Weather Service Tucson AZ
1005 PM MST Mon Jul 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1003 PM Rain 3 N Bisbee 31.44N 109.92W
07/27/2026 M1.46 Inch Cochise AZ Public
Rain gauge measured 1.46 inches of rainfall
in 30 minutes in Bisbee.
&&
DVSLocal storm report, Jul 27, 10:11 PM MST, 20 minutes before
Preliminary Local Storm Report
National Weather Service Tucson AZ
1011 PM MST Mon Jul 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1005 PM Rain 11 SE Sierra Vista 31.45N 110.18W
07/27/2026 M0.95 Inch Cochise AZ Trained Spotter
Spotter reported 0.95 inches of rain in 20
minutes.
&&
AHLocal storm report, Jul 27, 10:15 PM MST, 16 minutes before
Preliminary Local Storm Report
National Weather Service Tucson AZ
1015 PM MST Mon Jul 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0956 PM Rain 4 NNW Bisbee 31.46N 109.94W
07/27/2026 M1.18 Inch Cochise AZ Mesonet
Mesonet station BTAA3 Bisbee Tunnel.
&&
DVSThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 6:09 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Jul 27, 6:39 PM MST | Severe Thunderstorm Warning | TWC | Pima | 51 min |
| Jul 27, 6:40 PM MST | Flash Flood Warning | TWC | Pima | 2 hr |
| Jul 27, 8:39 PM MST | Flood Watch | TWC | Cochise, Graham, Pima, Santa Cruz | 8 hr |
| Jul 27, 9:33 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 42 min |
| Jul 27, 9:57 PM MST | Flash Flood Warning | TWC | Cochise | 3 hr |
| Jul 27, 10:11 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 49 min |
| Jul 27, 11:02 PM MST | Flash Flood Warning | TWC | Santa Cruz | 106 min |
| Jul 27, 11:33 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 42 min |
| Jul 28, 12:59 AM MST | Severe Thunderstorm Warning | TWC | Graham | 46 min |
| Jul 28, 1:26 AM MST | Severe Thunderstorm Warning | TWC | Cochise | 49 min |
| Jul 28, 2:18 AM MST | Severe Thunderstorm Warning | TWC | Pima | 42 min |
| Jul 28, 7:54 AM MST | Areal Flood Advisory | TWC | Cochise | 3 hr |
| Jul 28, 11:22 AM MST | Areal Flood Warning | TWC | Cochise | 6 hr |
| Jul 28, 1:33 PM MST | Severe Thunderstorm Warning | TWC | Greenlee | 42 min |
| Jul 28, 2:10 PM MST | Flash Flood Warning | TWC | Greenlee | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 2026Every flash flood 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.