Tropical Storm Ivo (2013)

Basin

Eastern Pacific

Dates

August 20, 2013 to August 27, 2013

Peak strength

Tropical Storm, 40 kt (46 mph)

Lowest pressure

997 mb (29.44 inHg)

Landfall

No; closest approach 111 km (69 mi)

Accumulated cyclone energy

1.1

Tropical-storm-force wind reached

170 nmi (315 km, 196 mi) from the center at its widest

Eyewall radius at its peak

150 nmi (278 km, 173 mi)

Overall size

250 nmi (463 km, 288 mi) to the outermost closed isobar

Peak gust in the best track

50 kt (58 mph)

Fastest the center moved

12 kt (14 mph)

Identifier

EP092013

The sources count different things and are not added together.

NOAA’s Storm Events database, the record National Weather Service offices compile months after a storm, as compiled March 2026.

Deaths

0 (0 direct, 0 indirect)

Injuries

0

Property damage

$869,000

Crop damage

none recorded

Events recorded

29 in 7 reports from 2 states and marine areas

State by state

What was recorded

19 flash flood, 8 thunderstorm wind, 1 heavy rain, 1 hail.

The Weather Prediction Center attributes 1,907 rain gauge totals over the contiguous United States to this storm. The wettest reached 4.42 inches (112 mm).

WPC’s storm rainfall file, 1900 to 2020, compiled by David Roth.

The strongest winds National Weather Service offices recorded with this storm. An estimated figure is a forecaster’s judgment from the damage, not an instrument reading.

From the Storm Events narratives, unedited.

Copious amounts of tropical moisture continued to flow into southern Arizona on August 24th, and this led to a very moist and unstable airmass. Scattered thunderstorms developed across much of La Paz county during the middle of the morning and they produced very heavy rain with rain rates in excess of 2 inches at times. The heavy rain affected both Highway 60 and Interstate 10 east of Brenda, and led to flash flooding which continued into the early afternoon hours. Small stream flood advisories were issued for portions of northeast and central La Paz counties starting at 0630MST, and they were upgraded to Flash Flood Warnings at 0933MST. Flash Flood Warnings for central La Paz county continued until about 1345MST. According to reports from the public, at 1100MST water was flowing across Avenue 42E and numerous washes east of Brenda were running heavily.

La Paz, Arizona · Flash Flood · Aug 24, 15:45 UTC

Tropical moisture from dissipating former tropical storm Ivo spread north into eastern Riverside county on August 24th and it led to a very moist and unstable airmass. Strong thunderstorms developed during the early afternoon hours in the area around Desert Center and Eagle Mountain, and they produced copious rainfall with rain rates in excess of 3 inches per hour at times. The first Flash Flood Warning was issued for central Riverside county at 1227PST, and it was re-issued at 1417PST. Eventually the rains dissipated and the warning was allowed to expire at 1715PST. According to local law enforcement, at about 1530PST the heavy rain caused significant flash flooding of Highway 177 near mile marker 5, to the northeast of Desert Center. Numerous vehicles were turning around as the road was impassable.

Riverside, California · Flash Flood · Aug 24, 20:30 UTC

Borrego Springs Valley Road from Rango Way to Tilting T Road, Borrego Springs Road (S-33) from San Pablo to Yaqui Pass, and S-22 (Montezuma grade) were closed all of Sunday night due to debris and flooding. Mobile homes were flooded in the DeAnza Mobile Home Park. A spotter reported 18 inches of water over Highway S-2 at Vallecito Creek. Several low water crossings were also flooded with swiftly moving water over Highway S-22 between Borrego Springs and Ranchita, including Yukie Road. Numerous large boulders blocked the roadway, with other debris and running water in the roadway. Around this time, 3.35 inches of rain fell in two hours near Ranchita.

San Diego, California · Flash Flood · Aug 25, 23:00 UTC

Scattered strong thunderstorms affected the greater Phoenix area during the evening hours on August 26th, and they affected the towns of Buckeye, Goodyear and Litchfield Park. The Buckeye airport mesonet sensor measured a sustained wind at 43 mph as well as a peak gust of 68 mph. In addition, a trained weather spotter located 2 miles northeast of Goodyear reported trees uprooted by the strong winds. According to a report from local broadcast media, several trees were uprooted near Litchfield park. Finally, another broadcast media report indicated that a large tree was blown down. When the tree fell it heavily damaged a home in Litchfield Park. A Severe Thunderstorm Warning was in effect for the affected communities; it was issued at 1908MST and it ran through 1945MST.

Maricopa, Arizona · Thunderstorm Wind · Aug 27, 02:15 UTC

• Tropical Storm AlvinEastern Pacific · 2013Tropical Storm50 kt · 1000 mb
• Hurricane BarbaraEastern Pacific · 2013Cat 170 kt · 983 mb
• Hurricane CosmeEastern Pacific · 2013Cat 175 kt · 980 mb
• Hurricane DalilaEastern Pacific · 2013Cat 170 kt · 984 mb
• Hurricane ErickEastern Pacific · 2013Cat 170 kt · 983 mb
• Tropical Storm FlossieEastern Pacific · 2013Tropical Storm60 kt · 994 mb
• Hurricane GilEastern Pacific · 2013Cat 175 kt · 985 mb
• Hurricane HenrietteEastern Pacific · 2013Cat 290 kt · 976 mb
• Unnamed tropical depressionEastern Pacific · 2013Tropical Depression30 kt · 1007 mb
• Tropical Storm UnalaEastern Pacific · 2013Tropical Storm35 kt · 1004 mb
• Hurricane PewaEastern Pacific · 2013Cat 165 kt · 987 mb
• Tropical Storm JulietteEastern Pacific · 2013Tropical Storm55 kt · 997 mb
• Hurricane KikoEastern Pacific · 2013Cat 165 kt · 989 mb
• Tropical Storm LorenaEastern Pacific · 2013Tropical Storm45 kt · 1002 mb
• Hurricane ManuelEastern Pacific · 2013Cat 165 kt · 983 mb
• Tropical Storm NardaEastern Pacific · 2013Tropical Storm55 kt · 997 mb
• Tropical Storm OctaveEastern Pacific · 2013Tropical Storm55 kt · 994 mb
• Tropical Storm PriscillaEastern Pacific · 2013Tropical Storm40 kt · 1001 mb
• Hurricane RaymondEastern Pacific · 2013Cat 3110 kt · 951 mb
• Tropical Storm SoniaEastern Pacific · 2013Tropical Storm40 kt · 1002 mb

A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.

Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.

• Tropical cyclone report, National Hurricane Center
• Every advisory and discussion NHC issued while it was live
• Best track as KMZ, National Hurricane Center