Alert archive / Arizona / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 71, NWS Tucson, AZ

July 27, 2026Cochise County, Arizona

NWS Tucson, AZ issued this severe thunderstorm warning at Jul 27, 2026, 10:11 PM MST for Cochise County, Arizona. It was in force for 49 min. 14 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, 10:11 PM MST (05:11 UTC)
Expired: Jul 27, 2026, 11:00 PM MST
In force: 49 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 64 km from the middle of the area, began a volume at 05:14 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, 10:11 PM MST	TSTM WND DMG	2 Se Sierra Vista, AZ	Delayed report. Report of metal awning ripped off by wind.
Jul 27, 10:12 PM MST	TSTM WND DMG	3 Se Sierra Vista, AZ	Delayed report. Large tree branch in roadway.
Jul 27, 10:15 PM MST	TSTM WND DMG	11 E Sierra Vista, AZ	Delayed report. Large cottonwood limb split from tree due to thunderstorm wind gusts. Near building at San Pedro conservation site.
Jul 27, 10:15 PM MST	TSTM WND DMG	12 Sse Sierra Vista, AZ	Delayed report. Metal large animal shelter destroyed.
Jul 27, 10:15 PM MST	TSTM WND DMG	2 Se Sierra Vista, AZ	Delayed report. Covered porch roofing ripped off.
Jul 27, 10:20 PM MST	TSTM WND DMG	3 Se Sierra Vista, AZ	Delayed report. Several large trees knocked down, one onto vehicle.
Jul 27, 10:20 PM MST	TSTM WND DMG	5 Ese Sierra Vista, AZ	Delayed report. Large tree knocked down onto vehicle.
Jul 27, 10:30 PM MST	TSTM WND DMG	1 Se Sierra Vista, AZ	Delayed Report. Cochise County Sherriff reported tree down at intersection of Buffalo Solider Trail and Fry Blvd. Time estimated by radar.
Jul 27, 10:30 PM MST	TSTM WND DMG	3 Ese Sierra Vista, AZ	Delayed report. Cochise County Sherriff reported metal roofing ripped off a business at the 2700 block off of Fry Blvd. Time estimated by radar.
Jul 27, 10:30 PM MST	TSTM WND DMG	3 E Sierra Vista, AZ	Delayed report. Reported a tree down in road.
Jul 27, 10:30 PM MST	TSTM WND DMG	4 Ese Sierra Vista, AZ	Delayed report. Cochise County Sherriff reported that a house near Ace Hardware had a tree that fell onto a house. Time estimated on radar.
Jul 27, 10:30 PM MST	TSTM WND DMG	4 E Sierra Vista, AZ	Delayed report. 35 ft tall ash tree knocked over onto home.
Jul 27, 10:39 PM MST	TSTM WND DMG	3 Ese Sierra Vista, AZ	Delayed Report. Report of a tree fallen on apartment.
Jul 27, 11:00 PM MST	TSTM WND DMG	12 W Bisbee, AZ	Delayed report. Tree knocked down.

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 14 storm reports to this severe thunderstorm warning; the first came 0 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, 5.2 hours before the alert went out and 334 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted.

286 
WUUS55 KTWC 280511
SVRTWC
AZC003-280600-
/O.NEW.KTWC.SV.W.0071.260728T0511Z-260728T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tucson AZ
1011 PM MST Mon Jul 27 2026

The National Weather Service in Tucson has issued a

* Severe Thunderstorm Warning for...
  Southwestern Cochise County in southeastern Arizona...

* Until 1100 PM MST.

* At 1011 PM MST, a severe thunderstorm was located over Hereford,
  moving west at 25 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage to
           roofs, siding, and trees.

* Locations impacted include...
  Sierra Vista, Hereford, Huachuca City, Fort Huachuca, Parker Canyon
  Lake, Palominas, Ramsey Canyon Preserve and Coronado National
  Memorial.

This includes the following highways...
Route 90 between mile markers 313 and 336. Route 80 between mile
markers 330 and 337. Route 92 between mile markers 322 and 343. Route
83 between mile markers 3 and 6.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.

&&

LAT...LON 3153 10992 3134 11010 3133 11035 3133 11046
      3167 11045
TIME...MOT...LOC 0510Z 99DEG 22KT 3139 11015

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CWR

1 follow-up statement

914 
WWUS55 KTWC 280603
SVSTWC

Severe Weather Statement
National Weather Service Tucson AZ
1103 PM MST Mon Jul 27 2026

AZC003-280613-
/O.EXP.KTWC.SV.W.0071.000000T0000Z-260728T0600Z/
Cochise AZ-
1103 PM MST Mon Jul 27 2026

...SEVERE THUNDERSTORM WARNING HAS EXPIRED FOR SOUTHWESTERN COCHISE
COUNTY...

The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire.

&&

LAT...LON 3153 10992 3134 11010 3133 11035 3133 11046
      3167 11045
TIME...MOT...LOC 0511Z 99DEG 22KT 3139 11016

$$

CWR

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 27, 12:30 PM MST, 9 hours 41 minutes earlier.

Area forecast discussion, Jul 27, 12:30 PM MST, 9 hours 41 minutes 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

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In the hours before

Local storm report, Jul 27, 9:57 PM MST, 14 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.

&&

DVS

Local storm report, Jul 27, 10:05 PM MST, 6 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.

&&

DVS

Local storm report, Jul 27, 10:11 PM MST, 0 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.

&&

AH

The 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 Considerable damage threat	TWC	Cochise	3 hr
Jul 27, 10:31 PM MST	Flash Flood Warning Considerable damage threat	TWC	Cochise	2 hr
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

Severe Thunderstorm Warnings in Arizona, 2026 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.