Alert archive / Iowa / Tornado Warnings in 2026

Tornado Warning 72, NWS Quad Cities, IA

August 7, 2026Buchanan County, Iowa

NWS Quad Cities, IA issued this tornado warning at Aug 7, 2026, 3:59 PM CDT for Buchanan County, Iowa. It was in force for 31 min. 3 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
Aug 7, 2026, 3:59 PM CDT (20:59 UTC)
Expired
Aug 7, 2026, 4:30 PM CDT
In force
31 min
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Tornado
Observed
Hail
0.75 in

County Buchanan County, IA

The radar

The Quad Cities radar (KDVN), 155 km from the middle of the area, began a volume at 21:03 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

TimeReportWhereRemark
Aug 7, 4:12 PM CDTTORNADO2 Se Fairbank, IAA well documented, large spatially, HP supercell, low-level mesocyclone produced an EF2 tornado along its 5 mile path. Most of the damage was EF1 damage to structures and trees. It is likely that this tornado had numerous short-lived vortices on the ground lea
Aug 7, 4:30 PM CDTTSTM WND DMG4 Sse Stanley, IARoof of a livestock barn is halfway torn off. Time estimated from radar.
Aug 7, 4:30 PM CDTTSTM WND DMG4 S Stanley, IARoof damage to livestock barns. Time estimated from radar.

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 one storm report to this tornado warning; the first came 13 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 7, 1:40 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.0 hours before the alert went out and 288 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2026-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 506 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2026-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 211 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
506 J/kg
Mixed-layer CIN
-343 J/kg
Mixed-layer LCL
1332 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
211 m²/s²
0-3 km storm-relative helicity
250 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

111 
WFUS53 KDVN 072059
TORDVN
IAC019-072130-
/O.NEW.KDVN.TO.W.0072.260807T2059Z-260807T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
359 PM CDT Fri Aug 7 2026

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Northwestern Buchanan County in northeastern Iowa...

* Until 430 PM CDT.

* At 359 PM CDT, a confirmed tornado was located near Readlyn, or 13 
  miles west of Oelwein, moving southeast at 40 mph. There have been 
  multiple reports of brief tornadoes in southern Bremer County and 
  northern Black Hawk County.

  HAZARD...Damaging tornado.

  SOURCE...Weather spotters confirmed tornado.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* The tornado will be near...
  Fairbank and Littleton around 405 PM CDT.
  Hazleton, Otterville, Fontana County Park, and Fontana Park around 
  410 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4246 9197 4255 9208 4264 9208 4264 9171
TIME...MOT...LOC 2059Z 311DEG 34KT 4265 9218 

TORNADO...OBSERVED
MAX HAIL SIZE...<.75 IN

$$

Gibbs
2 follow-up statements
177 
WWUS53 KDVN 072103
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
403 PM CDT Fri Aug 7 2026

IAC019-072130-
/O.CON.KDVN.TO.W.0072.000000T0000Z-260807T2130Z/
Buchanan IA-
403 PM CDT Fri Aug 7 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM CDT FOR
NORTHWESTERN BUCHANAN COUNTY...

At 402 PM CDT, a confirmed tornado was located near Fairbank, or 12 
miles west of Oelwein, moving southeast at 40 mph.

HAZARD...Damaging tornado and ping pong ball size hail.

SOURCE...Weather spotters confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornado will be near...
  Fairbank and Littleton around 405 PM CDT.
  Hazleton, Otterville, Fontana County Park, and Fontana Park around 
  410 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4246 9197 4255 9208 4264 9208 4264 9171
TIME...MOT...LOC 2102Z 311DEG 34KT 4264 9216 

TORNADO...OBSERVED
MAX HAIL SIZE...1.50 IN

$$

Gibbs
602 
WWUS53 KDVN 072113
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
413 PM CDT Fri Aug 7 2026

IAC019-072130-
/O.CON.KDVN.TO.W.0072.000000T0000Z-260807T2130Z/
Buchanan IA-
413 PM CDT Fri Aug 7 2026

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM CDT FOR
NORTHWESTERN BUCHANAN COUNTY...

At 413 PM CDT, a confirmed tornado was located over Fairbank, or 7
miles southwest of Oelwein, moving southeast at 40 mph.

HAZARD...Damaging tornado and golf ball size hail.

SOURCE...Weather spotters confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornado will be near...
  Hazleton, Stanley, Littleton, Otterville, Fontana County Park, and 
  Fontana Park around 420 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4246 9197 4255 9208 4264 9208 4264 9171
TIME...MOT...LOC 2113Z 304DEG 33KT 4261 9202 

TORNADO...OBSERVED
MAX HAIL SIZE...1.75 IN

$$

Gibbs

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Quad Cities, IA wrote its last area forecast discussion before this tornado warning went out at Aug 7, 2:27 PM CDT, 1 hour 32 minutes earlier. Its key messages:

  • A cold front will bring scattered showers and thunderstorms (30-50% coverage) to the area late this afternoon into the evening hours. A few of these storms could be severe with the primary hazards being gusty winds and locally heavy downpours.
  • An active pattern keeps rain chances on the table through the middle of next week with plenty of dry hours in between, but muggy to oppressive humidity returns.
Area forecast discussion, Aug 7, 2:27 PM CDT, 1 hour 32 minutes before
Area Forecast Discussion
National Weather Service Quad Cities IA IL
227 PM CDT Fri Aug 7 2026

.KEY MESSAGES...

- A cold front will bring scattered showers and thunderstorms
  (30-50% coverage) to the area late this afternoon into the
  evening hours. A few of these storms could be severe with the
  primary hazards being gusty winds and locally heavy
  downpours.

- An active pattern keeps rain chances on the table through the
  middle of next week with plenty of dry hours in between, but
  muggy to oppressive humidity returns.

&&

.SHORT TERM /THROUGH SATURDAY NIGHT/...
Issued at 158 PM CDT Fri Aug 7 2026

A line of thunderstorms continues to develop across central
Iowa early this afternoon. This line of storms is forecast to
move south southeastward along a CAPE gradient across central
and eastern Iowa this afternoon into this evening. There is a
severe thunderstorm watch in effect through 10 PM for area along
and west of a line from Manchester to Tipton to Wapello. Damaging
winds and heavy rain are the main threats. Storms are forecast
to exit the area prior to 6 UTC.

Later tonight, patchy fog is possible overnight as winds
becoming light with low abundant level moisture across the
area. Low temperatures are expected to be in the 60s. A cold
front is forecast to move across the area tonight and turn winds
to the west.

Winds are forecast to turn the south on Saturday with increasing
moisture during the afternoon and evening hours. High
temperatures on Saturday will be in the 80s across the area.

Another shortwave is forecast to move across the area Saturday
and bring chances of showers and thunderstorms to the area
mainly after midnight. Severe thunderstorms are possible
overnight. There is a Marginal (level 1 out of 5) Risk of
severe thunderstorms Saturday along and west of the Mississippi
River.

&&

.LONG TERM /SUNDAY THROUGH THURSDAY/...
Issued at 116 AM CDT Fri Aug 7 2026

Sunday-Monday...As the two shortwaves quickly move to the
southeast, the deformation zone remain in place Sunday, but
PoPs should decrease to 30-50% with the lack of upper-level
dynamical support. The low pressure over the Central Plains is
also expected to stall out which will be an issue heading into
Sunday night as another subtle shortwave zooms across Wyoming
into South Dakota and Nebraska. A second LLJ is likely to
develop, spawning another round of showers and storms Sunday
night into Monday. This shortwave trough will also reinvigorate
the deformation zone and pull it northward. The increased
southwesterly flow, low-level WAA, and moisture advection could
lead to excessive heat developing, especially in our south where
clearing skies are more likely. Current LREF guidance has a
20-30% chance of heat indices exceeding 100 degrees south of
Interstate 80 Monday afternoon. Regardless though, dew points
are going to be in the 70s, possibly in the mid-to-upper 70s
(40-60% chance per 06.12z LREF guidance), making it feel muggy
to oppressive outside even with potential cloud cover.

Tuesday-Thursday...Multiple shortwaves passages will keep
precipitation chances around through the middle of next week, but
these repeated passages should slowly push the deformation zone
further south as high pressure eventually settles back in over
the region. There is general consensus among the ensembles that
a return to north-to-northeasterly flow in the low-levels
should erode away at the high dew points and temperatures,
returning to the area to seasonable conditions by the end of
next week.

&&

.AVIATION /18Z TAFS THROUGH 18Z SATURDAY/...
Issued at 1240 PM CDT Fri Aug 7 2026

In the wake of fog this morning, periods of MVFR ceilings
continue across the area at all TAF sites. A storm system is
forecast to move across the area later this afternoon into this
evening with low confidence in the exact timing and locations.
Used 3 to 4 hour prob30 window at each TAF site to account for
the timing of these storms. If storms do occur than MVFR
ceilings are possible in storms with periods of IFR to LIFR
visibilities in the strongest storms. Conditions are expected to
improve to VFR behind the storm but fog is possible tonight
with MVFR to IFR visibilities possible after 06 UTC with
conditions improving by 14 UTC Saturday. Southerly winds today
will shift to the northwest behind the front from west to east.

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...None.
IL...None.
MO...None.

&&

SHORT TERM...Cousins
LONG TERM...Delaune
AVIATION...Cousins
Hazardous weather outlook, Aug 7, 6:00 AM CDT, 9 hours 59 minutes before
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
600 AM CDT Fri Aug 7 2026

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-081100-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
600 AM CDT Fri Aug 7 2026

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.

.DAY ONE...TODAY AND TONIGHT

Dense fog will reduce visibility to a quarter mile or less at
times across portions of eastern Iowa and northeast Missouri
through the early morning commute.

Scattered thunderstorms (30% to 50% chance) are possible late
this afternoon into the overnight, mainly west of the
Mississippi River. Isolated severe storms with hail and
strong winds is possible along with locally heavy rain.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

Another round of scattered showers and thunderstorms are possible
Saturday night and Sunday. A few of these storms could turn
severe with gusty winds, hail and heavy downpours.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed late this afternoon and evening.

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 7, 2:53 AM CDTDense Fog AdvisoryDVNBenton, Buchanan, Cedar, Delaware, Dubuque, Iowa and 7 more6 hr
Aug 7, 3:49 PM CDTSevere Thunderstorm WarningDVNBuchanan56 min
Aug 7, 4:20 PM CDTTornado WarningDVNBuchanan40 min
Aug 7, 4:38 PM CDTSevere Thunderstorm WarningDVNBenton, Buchanan37 min
Aug 7, 4:48 PM CDTSevere Thunderstorm WarningDVNBenton, Buchanan, Delaware, Jones, Linn57 min
Aug 7, 5:02 PM CDTTornado WarningDVNDelaware, Jones, Linn43 min
Aug 7, 5:03 PM CDTSevere Thunderstorm WarningDVNBuchanan27 min
Aug 7, 5:10 PM CDTTornado WarningDVNBuchanan, Linn35 min
Aug 7, 5:18 PM CDTTornado WarningDVNCedar, Jones, Linn57 min
Aug 7, 5:26 PM CDTSevere Thunderstorm WarningDVNBenton, Iowa, Johnson, Linn36 min
Aug 7, 5:57 PM CDTSevere Thunderstorm WarningDVNCedar, Clinton33 min
Aug 7, 6:30 PM CDTSpecial Weather StatementDVNScott45 min
Aug 7, 6:39 PM CDTSevere Thunderstorm WarningDVNIowa38 min

Nearby

Tornado Warnings in Iowa, 2026Every tornado warning in 2026Tornadoes 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.