Hail in Iowa, June 10, 2007

Name: Hail in Iowa, June 10, 2007
Start: 2007-06-10T10:20
End: 2007-06-10T10:20
Location: Iowa

June 10, 2007 · NWS DMX · 1 event in 1 county or zone

A southerly flow of moist air became established over Iowa during the overnight hours into the morning of the 10th. The airmass became unstable as surface dew points rose into the 60s.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: $2,000
Crop damage: $5,000
Events: 1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS DMX wrote it up.

A southerly flow of moist air became established over Iowa during the overnight hours into the morning of the 10th. The airmass became unstable as surface dew points rose into the 60s. Lifted indices dropped to the -8 C. range with most unstable CAPE in the 1000 to 2000 J/kg range. The shear environment was fairly decent with 30 to 40 kts of effective shear. Thunderstorms developed in southwest Iowa. One of the storms became severe in Taylor County and produced quarter size hail north of Lenox. The hail covered the ground with mostly marble size hail.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Des Moines, IA wrote its last area forecast discussion before the first event at Jun 10, 9:33 AM CST, 47 minutes earlier.

Area forecast discussion, Jun 10, 9:33 AM CST, 47 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE DES MOINES IA
1033 AM CDT SUN JUN 10 2007

.SHORT TERM /TODAY/...
WEAK MID LEVEL SHORTWAVE...MOISTURE ADVECTION AND CONVERGENCE...AND
FAIRLY GOOD INSTABILITY...MAINLY ELEVATED...IS SUSTAINING CONVECTION
OVER SW IA...AND LED TO INITIATION OVR SE SD. INSTABILITY AXIS
REMAINS ACROSS WRN IA AND INCREASES SOME OVER SRN IA THIS AFTN. HAVE
INCREASED POPS IN THESE AREAS FOR THE BALANCE OF THE DAY. SVR THREAT
THERE WITH ISOLATED LARGE HAILERS AND MAYBE SOME DAMAGING WIND. SLOW
EASTWARD MOVEMENT OF STORMS IN HIGH PWAT ENVIRONMENT WILL RAISE THE
CONCERN FOR HEAVY RAIN AND AT LEAST SOME LOCALIZED MINOR FLOODING.
WILL MONITOR CLOSELY. TIGHT MOISTURE GRADIENT ACROSS CENTRAL IA WILL
KEEP NORTHEAST AREAS DRY TODAY.

...FROM PREVIOUS DISCUSSION...

.DISCUSSION...
DIFFICULT FORECAST IN SHORT AND LONG TERM AS MOST MODELS HAVE MAJOR
PROBLEMS WITH NOT ENOUGH OR TOO MUCH RAIN.  GOING TO RELY ON LONG
TERM EURO AS MODEL OF CHOICE AS IT HAS BEEN MOST CONSISTENT.

MAIN CONCERN IN SHORT TERM IS HOW MODELS ARE HANDLING CURRENT
WEATHER PATTERN WITH BUILDING UPPER RIDGE OVER CENTRAL U.S AND
NEARLY STATIONARY FRONT IN DAKS AND NE.  MEANWHILE MODELS HAVE
DIFFERING SOLUTIONS IN REGARDS TO MINOR IMPULSES MOVING THROUGH THIS
PATTERN AND WHETHER SUCH ARE NOISE OR REAL. HAVE LEANED TOWARD A
DRIER FORECAST THROUGH TUESDAY.  AFTER TODAY UPPER RIDGE BUILDS
DESPITE FAIRLY UNSTABLE AIR WITH NO REAL FOCUS MECHANISM TO WORK
WITH.  SOUNDINGS IF THEY CAN BE BELIEVED POINT TO DECENT CAP AFTER
TODAY INCREASING WITH TIME.  MAYBE SOME ISOLATED DEVELOPMENT HOWEVER
ATTM DO NOT BELIEVE ANY REALLY GOOD CHANCE OF WIDESPREAD STORMS
UNTIL MID WEEK OR POSSIBLY LATER IF SOME SOLUTIONS CORRECT. VERY
SUMMER LIKE WITH HIGHS IN THE 80S AND DEW POINTS INTO THE 60S AND
LOW 70S.  AGAIN MAY HAVE ENVIRONMENT WITH INSTABILITY HIGH CAPE
LITTLE SHEAR AND INCREASING CAP LEAVING MOST OF THE STATE HIGH AND
DRY.  IF PREVIOUS SOLUTION ACCEPTED WOULD NOT EXPECT ANY WIDESPREAD
SEVERE WEATHER ONLY ISOLATED AT BEST.  BEST HAZARD WOULD BE HEAVY
RAINS AS STORMS WILL BE SLOW MOVING AND PWS ABOVE 1.2 EARLY IN
FORECAST PERIOD.

&&

.AVIATION...10/06Z
SOME MVFR CEILINGS ARE EXPECTED TO SPREAD INTO SOUTHERN IOWA THIS
MORNING. BEST CHCS FOR CONVECTION STILL APPEAR TO BE ACROSS THE WEST
TO SOUTHWEST COUNTIES...AND ONLY MENTION IN TAFS WILL BE A PERIOD OF
VCTS AT FOD/DSM DURING THE AFTERNOON INTO EARLY EVENING.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...NONE.

&&

SHORT TERM...MOYER
PUBLIC...FORSTER/83/16
AVIATION...KINNEY

Hazardous weather outlook, Jun 10, 8:05 AM CST, 2 hours 15 minutes before

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE DES MOINES IA
905 AM CDT SUN JUN 10 2007

IAZ004>007-016-017-025>028-036>039-047>050-061-062-074-075-
084>086-095>097-111100-
EMMET-KOSSUTH-WINNEBAGO-WORTH-HANCOCK-CERRO GORDO-WRIGHT-FRANKLIN-
BUTLER-BREMER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-BOONE-STORY-
MARSHALL-TAMA-JASPER-POWESHIEK-MARION-MAHASKA-LUCAS-MONROE-
WAPELLO-WAYNE-APPANOOSE-DAVIS-
905 AM CDT SUN JUN 10 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT CHANCE OF NON SEVERE THUNDERSTORMS LATE THIS
AFTERNOON AND TONIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

FOR MONDAY THROUGH WEDNESDAY THERE WILL BE CHANCE FOR
THUNDERSTORMS. SOME OF THESE STORMS COULD BECOME SEVERE AND
PRODUCE LARGE HAIL AND DAMAGING WINDS. HOWEVER THE EXACT TIME AND
AREA IS UNCERTAIN AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BECOME NECESSARY DURING THE WEEK.

IAZ015-023-024-033>035-044>046-057>060-070>073-081>083-092>094-
111100-
PALO ALTO-POCAHONTAS-HUMBOLDT-SAC-CALHOUN-WEBSTER-CRAWFORD-
CARROLL-GREENE-AUDUBON-GUTHRIE-DALLAS-POLK-CASS-ADAIR-MADISON-
WARREN-ADAMS-UNION-CLARKE-TAYLOR-RINGGOLD-DECATUR-
905 AM CDT SUN JUN 10 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...TODAY AND TONIGHT

THERE IS A CHANCE OF THUNDERSTORMS AND SOME OF THESE STORMS MAY
PRODUCE LARGE HAIL AND DAMAGING WINDS...MAINLY THIS AFTERNOON AND
EVENING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

FOR MONDAY THROUGH WEDNESDAY THERE WILL BE CHANCE FOR
THUNDERSTORMS. SOME OF THESE STORMS COULD BECOME SEVERE AND
PRODUCE LARGE HAIL AND DAMAGING WINDS. HOWEVER THE EXACT TIME AND
AREA IS UNCERTAIN AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY LATE THIS AFTERNOON AND EVENING.
SPOTTER ACTIVATION MAY ALSO BE NECESSARY AT TIMES DURING THE WEEK.

MOYER/FORSTER

The radar

The Des Moines radar (KDMX), 118 km away, was scanning. The volume nearest the first event began at 16:21 UTC.

Open the radar archive at this moment

Event by event

1 hail. Local standard time, as filed.

Hail, Taylor

When: June 10, 10:20 AM CST
Where: Taylor County, 1.05 mi W of Lenox
Measured: 1 in hail
Property damage: $2,000
Crop damage: $5,000
Reported by: Trained Spotter
Coordinates: 40.880, -94.570

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Iowa in 2007 Every state in 2007 This day in weather history Warnings in Iowa, June 2007

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 25592.