Alert archive / Iowa / Flash Flood Warnings in 1993

Flash Flood Warning 17, NWS Des Moines, IA

June 7, 1993Davis County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 7, 1993, 9:02 PM CDT for Davis County, Iowa. It was in force for 118 min.

The area

The counties it named.

The facts

Issued: Jun 7, 1993, 9:02 PM CDT (02:02 UTC)
Expired: Jun 7, 1993, 11:00 PM CDT
In force: 118 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Davis County, IA

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 2.0 hours before the alert went out and 338 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: 378 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1627 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

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

In the hours before

Special weather statement, Jun 7, 7:45 PM CDT, 1 hour 17 minutes before

IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038-
039-040-080140-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WATERLOO IA
745 PM CDT MON JUN 7 1993

...A TORNDADO WATCH IS IN EFFECT FOR NORTHEAST AND NORTH CENTRAL
IOWA UNTIL 2 AM...

AT 735PM A LINE OF STRONG THUNDERSTORMS WERE LOCATED FROM 10 MILES
SOUTHEAST OF WATERLOO...TO 10 MILES NORTH OF OELWEIN.  THESE STORMS
WERE PRODUCING VERY HEAVY RAINS...DANGEROUS LIGHTNING...GUSTY WINDS...
AND SMALL HAIL.  MOVEMENT OF THESE STORMS WAS TO THE NORTHEAST AT 30
MILES AN HOUR AND SHOULD MOVE INTO THE INDEPENDENCE...AND OELWEIN
AREAS BY 8PM.

A TORNADO WATCH IS IN EFFECT FOR NORTHEAST AND NORTH CENTRAL IOWA UNTIL
2AM TUESDAY MORNING.  ATMOSPHERIC CONDITIONS REMAIN FAVORABLE
FOR SEVERE THUNDERSTORM DEVELOPMENT TONIGHT AND TORNADOES ARE POSSIBLE
IN THE WATCH AREA.

A FLASH FLOOD WATCH IS ALSO IN EFFECT FOR ALL OF NORTHEAST AND
NORTH CENTRAL IOWA TONIGHT.

THOSE PERSONS IN NORTHEAST IOWA SHOULD STAY ALERT FOR RAPIDLY
CHANGING WEATHER CONDITIONS AND STAYED TUNED TO YOUR TELEVISION...
RADIO...OR NOAA WEATHER RADIO STATION FOR FURTHER UPDATES AND
POSSIBLE WARNINGS.

LINDENBERG

Special weather statement, Jun 7, 7:58 PM CDT, 1 hour 4 minutes before

IAZALL-080140-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
758 PM CDT MON JUN 7 1993

...A TORNADO WATCH IS IN EFFECT FOR THE EASTERN TWO-THIRDS OF IOWA
   UNTIL 2AM...
...A FLASH FLOOD WATCH IS IN EFFECT FOR ALL BUT EXTREME NORTHWEST
    IOWA TONIGHT...

AT 730 PM CDT...AN AREA OF SHOWERS AND STRONG THUNDERSTORMS CONTINUED
OVER ABOUT THE SOUTHEASTERN HALF OF IOWA. THE SHOWERS AND STORMS
WERE GENERALLY SOUTH AND EAST OF A LINE FROM LAMONI TO WATERLOO TO
DECORAH. THE STRONGEST STORMS WERE LOCATED OVER SOUTH CENTRAL AND
SOUTHEASTERN IOWA IN MONROE AND APPANOOSE COUNTIES BETWEEN ALBIA AND
CENTERVILLE. DANGEROUS LIGHTNING...GUSTY WINDS AND HAIL ARE POSSIBLE
WITH THESE STORMS. OTHER STRONG STORMS WERE LOCATED IN EAST CENTRAL IOWA
NEAR CEDAR RAPIDS.

ANOTHER AREA OF STRONG THUNDERSTORMS WAS LOCATED IN NORTHWESTERN IOWA
ABOUT 10 MILES WEST OF SPENCER. THESE STORMS ARE ALSO CAPABLE OF
PRODUCING STRONG WINDS...DANGEROUS LIGHTNING AND HAIL.

MOVEMENT OF ALL THE SHOWERS AND THUNDERSTORMS WAS TO THE NORTHEAST AT
35 MILES AN HOUR.

PETERSEN/MARTIN

Special weather statement, Jun 7, 7:59 PM CDT, 1 hour 3 minutes before

IAZALL-080140-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
758 PM CDT MON JUN 7 1993

...A TORNADO WATCH IS IN EFFECT FOR THE EASTERN TWO-THIRDS OF IOWA
   UNTIL 2AM...
...A FLASH FLOOD WATCH IS IN EFFECT FOR ALL BUT EXTREME NORTHWEST
    IOWA TONIGHT...

AT 730 PM CDT...AN AREA OF SHOWERS AND STRONG THUNDERSTORMS CONTINUED
OVER ABOUT THE SOUTHEASTERN HALF OF IOWA. THE SHOWERS AND STORMS
WERE GENERALLY SOUTH AND EAST OF A LINE FROM LAMONI TO WATERLOO TO
DECORAH. THE STRONGEST STORMS WERE LOCATED OVER SOUTH CENTRAL AND
SOUTHEASTERN IOWA IN MONROE AND APPANOOSE COUNTIES BETWEEN ALBIA AND
CENTERVILLE. DANGEROUS LIGHTNING...GUSTY WINDS AND HAIL ARE POSSIBLE
WITH THESE STORMS. OTHER STRONG STORMS WERE LOCATED IN EAST CENTRAL IOWA
NEAR CEDAR RAPIDS.

ANOTHER AREA OF STRONG THUNDERSTORMS WAS LOCATED IN NORTHWESTERN IOWA
ABOUT 10 MILES WEST OF SPENCER. THESE STORMS ARE ALSO CAPABLE OF
PRODUCING STRONG WINDS...DANGEROUS LIGHTNING AND HAIL.

MOVEMENT OF ALL THE SHOWERS AND THUNDERSTORMS WAS TO THE NORTHEAST AT
35 MILES AN HOUR.

PETERSEN/MARTIN

Special weather statement, Jun 7, 8:51 PM CDT, 11 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Special weather statement, Jun 7, 8:52 PM CDT, 10 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Special weather statement, Jun 7, 9:00 PM CDT, 2 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 7, 7:03 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose	27 min
Jun 7, 7:14 PM CDT	Tornado Warning	DMX	Dickinson	26 min
Jun 7, 7:47 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	43 min
Jun 7, 8:09 PM CDT	Flash Flood Warning	DMX	Appanoose, Monroe, Wayne	3 hr
Jun 7, 8:09 PM CDT	Flash Flood Warning	DMX	Wapello	3 hr
Jun 7, 8:37 PM CDT	Flash Flood Warning	DMX	Keokuk	2 hr
Jun 7, 8:45 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	25 min
Jun 7, 9:18 PM CDT	Severe Thunderstorm Warning	DMX	Johnson, Washington	42 min
Jun 7, 10:53 PM CDT	Flash Flood Warning	DMX	Appanoose, Davis	97 min
Jun 8, 11:31 AM CDT	Severe Thunderstorm Warning	DMX	Winneshiek	29 min
Jun 8, 11:52 AM CDT	Tornado Warning	DMX	Winneshiek	38 min
Jun 8, 12:16 PM CDT	Severe Thunderstorm Warning	DMX	Allamakee	44 min
Jun 8, 1:11 PM CDT	Tornado Warning	DMX	Worth	49 min
Jun 8, 1:16 PM CDT	Severe Thunderstorm Warning	DMX	Mitchell	42 min
Jun 8, 1:45 PM CDT	Severe Thunderstorm Warning	DMX	Howard, Winneshiek	26 min
Jun 8, 1:48 PM CDT	Tornado Warning	DMX	Wright	27 min
Jun 8, 6:01 PM CDT	Tornado Warning	DMX	Washington	29 min

Nearby

Flash Flood Warnings in Iowa, 1993 Every flash flood warning in 1993

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.