Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 32, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 27, 1993, 2:14 AM CDT for Johnson County, Washington County, Iowa. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jun 27, 1993, 2:14 AM CDT (07:14 UTC)
- Expired
- Jun 27, 1993, 5:15 AM CDT
- In force
- 3 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Johnson County, IA, Washington County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 7.2 hours before the alert went out and 394 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.
- Mixed-layer CAPE
- 911 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1826 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 4.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 270715 FFWDSM IAC103-183-271015- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 214 AM CDT SUN JUN 27 1993 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 515 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION(S)S... IN EAST CENTRAL IOWA ...SOUTHEASTERN JOHNSON COUNTY IN SOUTHEAST IOWA ...NORTHEASTERN WASHINGTON COUNTY AT 210 AM CDT...RADAR INDICATED STRONG STORMS WERE MERGING AND DEVELOPING AT A RAPID RATE NEAR THE BORDERS OF SOUTHEAST JOHNSON AND NORTHEAST WASHINGTON COUNTIES. CREEKS...STREAMS AND TRIBUTARIES ALONG THE ENGLISH AND IOWA RIVER BASINS WILL BE MOST SUSCEPTIBLE TO FLASH FLOODING. SOME CREEKS INCLUDED IN THIS WARNING INCLUDE: MANS...DIRTY FACE...PICAYUNE...SNYDER...BUCK AND BIG SLOUGH CREEKS. A RAINFALL RATE OF 1.00 INCH PER HOUR WAS REPORTED BY KRNA RADIO STATION AS A STORM MOVED THROUGH THE IOWA CITY AREA AROUND 150 AM. MOVEMENT WAS SOUTHEAST AT NEAR 35 MILES AN HOUR. TORRENTIAL RAINFALL...FREQUENT LIGHTNING...VERY STRONG WIND GUSTS AND SMALL HAIL CAN BE EXPECTED WITH THE STRONGEST STORMS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. BURKE &
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 26, 11:43 PM CDT, 2 hours 31 minutes before
IAZALL-270540- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1143 PM CDT SAT JUN 26 1993 AT 1130 PM CDT...ISOLATED STRONG THUNDERSTORMS WERE OCCURRING OVER CENTRAL AND EAST CENTRAL IOWA. THE STRONGEST STORM WAS LOCATED 45 MILES NORTHEAST OF DES MOINES NEAR MARSHALLTOWN. THIS STORM WAS PRODUCING HEAVY RAIN...DANGEROUS LIGHTNING...AND POSSIBLY SOME SMALL HAIL. THE STORM WAS PART OF A BAND OF SHOWERS AND STORMS THAT WAS 25 MILES WIDE AND CENTERED FROM 30 MILES NORTHEAST OF DES MOINES NEAR NEVADA... TO 20 MILES NORTHWEST OF CEDAR RAPIDS. ANOTHER SMALL CLUSTER OF THUNDERSTORMS WAS LOCATED 15 TO 35 MILES WEST OF DES MOINES BETWEEN GUTHRIE CENTER AND ADEL. THE SHOWERS AND STORMS WERE MOVING EAST AT AROUND 35 MILES AN HOUR. KALLMAN
Special weather statement, Jun 26, 11:43 PM CDT, 2 hours 31 minutes before
IAZALL-270540- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1143 PM CDT SAT JUN 26 1993 AT 1130 PM CDT...ISOLATED STRONG THUNDERSTORMS WERE OCCURRING OVER CENTRAL AND EAST CENTRAL IOWA. THE STRONGEST STORM WAS LOCATED 45 MILES NORTHEAST OF DES MOINES NEAR MARSHALLTOWN. THIS STORM WAS PRODUCING HEAVY RAIN...DANGEROUS LIGHTNING...AND POSSIBLY SOME SMALL HAIL. THE STORM WAS PART OF A BAND OF SHOWERS AND STORMS THAT WAS 25 MILES WIDE AND CENTERED FROM 30 MILES NORTHEAST OF DES MOINES NEAR NEVADA... TO 20 MILES NORTHWEST OF CEDAR RAPIDS. ANOTHER SMALL CLUSTER OF THUNDERSTORMS WAS LOCATED 15 TO 35 MILES WEST OF DES MOINES BETWEEN GUTHRIE CENTER AND ADEL. THE SHOWERS AND STORMS WERE MOVING EAST AT AROUND 35 MILES AN HOUR. KALLMAN
Special weather statement, Jun 27, 12:40 AM CDT, 1 hour 34 minutes before
IAZ026>030-038>042-053-054-270630- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 1240 AM CDT SUN JUN 27 1993 ...ISOLATED STRONG THUNDERSTORMS ARE MOVING INTO SOUTHERN JONES COUNTY... AT 1235 AM CDT...ISOLATED STRONG THUNDERSTORMS WERE MOVING INTO SOUTHERN JONES COUNTY. THESE ISOLATED STORMS WILL MOVE THROUGH THE TOWNS OF MORLY...OLIN...HALE AND WYOMING BY 135 AM AND WILL PRODUCE HEAVY RAINS...FREQUENT DEADLY LIGHTNING AND POSSIBLY SOME SMALL HAIL. OTHERWISE...THE REST OF NORTHEAST IOWA IS EXPECTED TO SEE PARTLY CLOUDY SKIES PREVAILING WITH THE THREAT OF SHOWERS AND THUNDERSTORMS CONTINUING THROUGH THE NIGHTTIME HOURS. THE MERCURY IS ANTICIPATED TO FALL TO AROUND 60 DEGREES THROUGH THE NIGHT WITH WEST TO NORTHWEST WINDS CONTINUING AT 5 TO 10 MILES AN HOUR.
Special weather statement, Jun 27, 12:43 AM CDT, 1 hour 31 minutes before
IAZ026>030-038>042-053-054-270630- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 1240 AM CDT SUN JUN 27 1993 ...ISOLATED STRONG THUNDERSTORMS ARE MOVING INTO SOUTHERN JONES COUNTY... AT 1235 AM CDT...ISOLATED STRONG THUNDERSTORMS WERE MOVING INTO SOUTHERN JONES COUNTY. THESE ISOLATED STORMS WILL MOVE THROUGH THE TOWNS OF MORLY...OLIN...HALE AND WYOMING BY 135 AM AND WILL PRODUCE HEAVY RAINS...FREQUENT DEADLY LIGHTNING AND POSSIBLY SOME SMALL HAIL. OTHERWISE...THE REST OF NORTHEAST IOWA IS EXPECTED TO SEE PARTLY CLOUDY SKIES PREVAILING WITH THE THREAT OF SHOWERS AND THUNDERSTORMS CONTINUING THROUGH THE NIGHTTIME HOURS. THE MERCURY IS ANTICIPATED TO FALL TO AROUND 60 DEGREES THROUGH THE NIGHT WITH WEST TO NORTHWEST WINDS CONTINUING AT 5 TO 10 MILES AN HOUR.
Special weather statement, Jun 27, 1:45 AM CDT, 29 minutes before
IAZALL-270640- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 145 AM CDT SUN JUN 27 1993 AT 131 AM CDT...SCATTERED THUNDERSTORMS WITH VERY HEAVY RAIN AND DEADLY LIGHTNING CONTINUED ACROSS CENTRAL AND EAST CENTRAL IOWA. THIS THUNDERSTORM AREA WAS 50 MILES WIDE AND EXTENDED FROM 20 MILES WEST OF DES MOINES TO THE QUAD CITIES. STORMS WITH VERY HEAVY RAIN AND POSSIBLE SMALL HAIL WERE LOCATED 20 MILES NORTH OF DES MOINES BETWEEN MADRID AND FARRAR...15 MILES SOUTHWEST OF CEDAR RAPIDS AND JUST NORTHWEST OF IOWA CITY. MOVEMENT WAS EAST-SOUTHEAST AT 40 MILES AN HOUR. R A PRENTICE
Special weather statement, Jun 27, 1:46 AM CDT, 28 minutes before
IAZALL-270640- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 145 AM CDT SUN JUN 27 1993 AT 131 AM CDT...SCATTERED THUNDERSTORMS WITH VERY HEAVY RAIN AND DEADLY LIGHTNING CONTINUED ACROSS CENTRAL AND EAST CENTRAL IOWA. THIS THUNDERSTORM AREA WAS 50 MILES WIDE AND EXTENDED FROM 20 MILES WEST OF DES MOINES TO THE QUAD CITIES. STORMS WITH VERY HEAVY RAIN AND POSSIBLE SMALL HAIL WERE LOCATED 20 MILES NORTH OF DES MOINES BETWEEN MADRID AND FARRAR...15 MILES SOUTHWEST OF CEDAR RAPIDS AND JUST NORTHWEST OF IOWA CITY. MOVEMENT WAS EAST-SOUTHEAST AT 40 MILES AN HOUR. R A PRENTICE
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 8:22 PM CDT | Severe Thunderstorm Warning | DMX | Audubon | 36 min |
| Jun 26, 8:48 PM CDT | Severe Thunderstorm Warning | DMX | Guthrie | 27 min |
| Jun 26, 9:24 PM CDT | Severe Thunderstorm Warning | DMX | Dallas | 36 min |
| Jun 26, 9:39 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 25 min |
| Jun 27, 3:36 AM CDT | Flash Flood Warning | DMX | Johnson, Washington | 3 hr |
Nearby
Flash Flood Warnings in Iowa, 1993Every 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.