Flash Flood Warning 59, NWS Tucson, AZ

658 
WGUS75 KTWC 182059
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
159 PM MST Sat Jul 18 2026

AZC003-182300-
/O.CON.KTWC.FF.W.0059.000000T0000Z-260718T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cochise AZ-
159 PM MST Sat Jul 18 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 4 PM MST THIS
AFTERNOON FOR SOUTHWESTERN COCHISE COUNTY...

At 159 PM MST, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
0.7 and 1.3 inches of rain have fallen. Additional rainfall amounts
up to 0.2 inches are possible in the warned area. Flash flooding is
ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar and automated gauges.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Hereford.

This includes Route 92 between mile markers 331 and 335.

This includes the following streams and drainages...
  San Pedro River.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Remain alert for flooding even in locations not receiving rain.
Washes, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.

&&

LAT...LON 3139 11029 3137 11027 3137 11020 3142 11019
      3142 11029

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

KJS

940 
WGUS75 KTWC 182252
FFSTWC

Flash Flood Statement
National Weather Service Tucson AZ
352 PM MST Sat Jul 18 2026

AZC003-182302-
/O.EXP.KTWC.FF.W.0059.000000T0000Z-260718T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cochise AZ-
352 PM MST Sat Jul 18 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 4 PM MST THIS AFTERNOON FOR
SOUTHWESTERN COCHISE COUNTY...

The heavy rain has ended. Flood waters have receded. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.

&&

LAT...LON 3139 11029 3137 11027 3137 11020 3142 11019
      3142 11029

$$

GEL

Area Forecast Discussion
National Weather Service Tucson AZ
1232 PM MST Sat Jul 18 2026

.SYNOPSIS...

Scattered showers and thunderstorms will continue this
afternoon areas east and south of Tucson. These storms will
have the potential for heavy rainfall. Otherwise, chances for
showers and thunderstorms will continue into Sunday with a
possible uptick in thunderstorm activity next Monday and
especially Tuesday.

&&

.DISCUSSION...

An upper-level low continues to be positioned in central-western
Texas driving storm motion here in southern Arizona. Isolated
to scattered showers and thunderstorms continue to pop up areas
east of Tucson. Substantial moisture remains in place today with
surface dewpoints in the mid 50s to upper 60s and satellite
derived PWATs between 1.5 to 1.8 inches. CAMs are still having a
hard time capturing what is going to happen today, showing
widely varying outcomes with each run of the models. In general,
thunderstorms seem to be focused to areas east and south of
Tucson, initiating off the terrain and moving to the south at 5
to 10 mph. The main concern associated with storms today is
heavy downpours leading to nuisance ponding and flooding and
flash flooding associated with stronger storm. While wind is not
a huge concern today there may still be strong to gusty outflow
winds.

Over the next few days, the low over western TX will morph into
an inverted trough as high pressure currently to our west will
gradually move into southern UT and CO by Monday. The trough
will push into eastern AZ starting Monday into northern Arizona
by Tuesday as high pressure moves into the central U.S. This
will help bring in more moisture into the area and slow
southerly flow leading to our next up day. The Weather
Prediction Center has placed portions of AZ into slight risk
through Tuesday. Sunday and Monday there are still chances for
daily thunderstorms each day with their own nuances.

&&

.AVIATION... Valid through 20/00Z.

SKC to BKN clouds AOA 4-8k ft AGL and BKN to OVC clouds AOA
8-12k ft AGL. Isolated to scattered -SHRA/TSRA will continue
mostly east of KTUS until roughly 18/22Z. Brief heavy rainfall
and erratic strong wind gusts of 30-40 kts possible with any
storm. Outside of thunderstorms, surface winds generally under
10 kts. 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.
An increase in thunderstorm activity is expected Monday and
especially Tuesday of next week. 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.

&&

Malarkey

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