Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 113, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 19, 1994, 2:51 PM CDT for Grundy County, Iowa. It was in force for 39 min.
The area
The counties it named.
The facts
- Issued
- Jun 19, 1994, 2:51 PM CDT (19:51 UTC)
- Expired
- Jun 19, 1994, 3:30 PM CDT
- In force
- 39 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Grundy County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 7.9 hours before the alert went out and 280 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
- 741 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 734 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KALO 191949 SVRDMX IAC075-192030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WATERLOO IA 251 PM CDT SUN JUN 19 1994 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN CENTRAL IOWA ...WESTERN GRUNDY COUNTY AT 250 PM RADAR INDICATED A SEVERE THUNDERSTORM 25 MILES SOUTHWEST OF WATERLOO OR 8 MILES EAST OF ELDORA. THE STORM WAS MOVING NORTHEAST AT 10 TO 15 MILES AN HOUR AND WILL AFFECT THE TOWNS OF HOLLAND...WELLSBURG AND GRUNDY CENTER. WHEN THUNDERSTORMS ARE OCCURRING...MOVE INSIDE A REINFORCED BUILDING. STAY AWAY FROM WINDOWS. DON'T USE ELECTRICAL APPLIANCES OR TELEPHONES EXCEPT IN AN EMERGENCY UNTIL THE STORM HAS PASSED. PABST/COLLAR
What forecasters said that day
The local office's own words before this severe thunderstorm 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 19, 2:28 PM CDT, 23 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-192030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 229 PM CDT SUN JUN 19 1994 ...THUNDERSTORMS HAVE DEVELOPED ACROSS NORTHEAST IOWA... CLUSTERS OF THUNDERSTORMS WERE OCCURRING FROM 30 MILES SOUTHWEST OF WATERLOO TO 30 MILES SOUTH OF MASON CITY TO AROUND AND EAST OF MASON CITY. THESE STORMS WILL BE CAPABLE OF PRODUCING VERY HEAVY RAINFALL DUE TO THEIR SLOW MOVEMENT (NORTH/NORTHEAST AT 5 TO 10 MPH). IN ADDITION FREQUENT DEADLY LIGHTNING...GUSTY WINDS TO 30 MPH AND 1/4 TO 1/2 INCH HAIL WILL ACCOMPANY THESE STORMS. THROUGH 325 PM THE AREAS TO SEE THE MOST THUNDERSTORMS INCLUDE: CONRAD AND BEAMAN (GRUNDY CO.)...POPEJOY...COULTER AND LATIMER (FRANKLIN CO.)...PLYMOUTH AND ROCK FALLS (CERRO GORDO CO.)...NORA SPRINGS (FLOYD CO.)...ST. ANSGAR...MITCHELL AND OSAGE (MITCHELL CO.). WIDELY SCATTERED STORMS WILL OCCUR TO THE EAST OF HIGHWAY 63. THESE STORMS MAY PRODUCE AN INCH OF RAIN IN A SHORT PERIOD SO DRIVERS SHOULD BE AWARE OF PONDING OF WATER ON ROADS IN LOW-LYING AREAS. COLLAR
Special weather statement, Jun 19, 2:29 PM CDT, 22 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-192030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 229 PM CDT SUN JUN 19 1994 ...THUNDERSTORMS HAVE DEVELOPED ACROSS NORTHEAST IOWA... CLUSTERS OF THUNDERSTORMS WERE OCCURRING FROM 30 MILES SOUTHWEST OF WATERLOO TO 30 MILES SOUTH OF MASON CITY TO AROUND AND EAST OF MASON CITY. THESE STORMS WILL BE CAPABLE OF PRODUCING VERY HEAVY RAINFALL DUE TO THEIR SLOW MOVEMENT (NORTH/NORTHEAST AT 5 TO 10 MPH). IN ADDITION FREQUENT DEADLY LIGHTNING...GUSTY WINDS TO 30 MPH AND 1/4 TO 1/2 INCH HAIL WILL ACCOMPANY THESE STORMS. THROUGH 325 PM THE AREAS TO SEE THE MOST THUNDERSTORMS INCLUDE: CONRAD AND BEAMAN (GRUNDY CO.)...POPEJOY...COULTER AND LATIMER (FRANKLIN CO.)...PLYMOUTH AND ROCK FALLS (CERRO GORDO CO.)...NORA SPRINGS (FLOYD CO.)...ST. ANSGAR...MITCHELL AND OSAGE (MITCHELL CO.). WIDELY SCATTERED STORMS WILL OCCUR TO THE EAST OF HIGHWAY 63. THESE STORMS MAY PRODUCE AN INCH OF RAIN IN A SHORT PERIOD SO DRIVERS SHOULD BE AWARE OF PONDING OF WATER ON ROADS IN LOW-LYING AREAS. COLLAR
Special weather statement, Jun 19, 2:32 PM CDT, 19 minutes before
IAZ071-057-047-045-070-044-059-046-058-061-072-023-060-048-073- 035-192030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 229 PM CDT SUN JUN 19 1994 ...THUNDERSTORMS WERE EXPLODING OVER WEST CENTRAL IOWA... AT 225 PM CDT DOPPLER RADAR INDICATED STRONG THUNDERSTORMS WITH VERY HEAVY RAIN...PEA SIZED HAIL AND DEADLY LIGHTNING. SOME GUSTY WINDS UP TO 40 MILES AN HOUR ARE ALSO POSSIBLE WITH THESE THUNDERSTORMS. THE STORMS WERE LOCATED FROM NEAR ATLANTIC TO GUTHRIE CENTER...WEST TO NEAR EARLHAM. THE STORMS WERE MOVING TO THE NORTHEAST AND SHOULD ENTER THE DES MOINES METRO BY 3 PM CDT. THESE STORMS HAVE THE POTENTIAL TO PRODUCE TORRENTIAL RAIN. PONDING OF WATER WILL OCCUR QUICKLY IN POOR DRAINAGE AND LOW-LYING AREAS. BELLES
Special weather statement, Jun 19, 2:42 PM CDT, 9 minutes before
IAZ071-057-047-045-070-044-059-046-058-061-072-023-060-048-073- 035-192030- SPECIAL WEATHER STATEMENT...CORRECT DIRECTION 4TH LINE NATIONAL WEATHER SERVICE DES MOINES IA 229 PM CDT SUN JUN 19 1994 ...THUNDERSTORMS WERE EXPLODING OVER WEST CENTRAL IOWA... AT 225 PM CDT DOPPLER RADAR INDICATED STRONG THUNDERSTORMS WITH VERY HEAVY RAIN...PEA SIZED HAIL AND DEADLY LIGHTNING. SOME GUSTY WINDS UP TO 40 MILES AN HOUR ARE ALSO POSSIBLE WITH THESE THUNDERSTORMS. THE STORMS WERE LOCATED FROM NEAR ATLANTIC TO GUTHRIE CENTER...EAST TO NEAR EARLHAM. THE STORMS WERE MOVING TO THE NORTHEAST AND SHOULD ENTER THE DES MOINES METRO BY 3 PM CDT. THESE STORMS HAVE THE POTENTIAL TO PRODUCE TORRENTIAL RAIN. PONDING OF WATER WILL OCCUR QUICKLY IN POOR DRAINAGE AND LOW-LYING AREAS. BELLES
Special weather statement, Jun 19, 2:50 PM CDT, 1 minute before
IAZALL-192100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 250 PM CDT SUN JUN 19 1994 ...THUNDERSTORMS STALLING OVER CENTRAL IOWA COUNTIES... AT 235 PM CDT DOPPLER RADAR INDICATED STRONG THUNDERSTORMS WITH VERY HEAVY RAIN AFFECTING TAMA...GRUNDY...AND MARSHALL COUNTIES. THE MOST INTENSE RAINS STALLED OVER NORTHERN MARSHALL COUNTY JUST NORTH OF MARSHALLTOWN. THE STORM TOTAL PRECIPITATION HAS REACHED AMOUNTS OF 1 TO 3 INCHES HOWEVER DURING THE PAST TEN MINUTES THE STORMS WERE WEAKENING. BE AWARE OF PONDING WATER AND LOCALIZED FLOODING IN DITCHES AND LOW LYING AREAS. KAUFMAN
Special weather statement, Jun 19, 2:51 PM CDT, 0 minutes before
IAZALL-192100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 250 PM CDT SUN JUN 19 1994 ...THUNDERSTORMS STALLING OVER CENTRAL IOWA COUNTIES... AT 235 PM CDT DOPPLER RADAR INDICATED STRONG THUNDERSTORMS WITH VERY HEAVY RAIN AFFECTING TAMA...GRUNDY...AND MARSHALL COUNTIES. THE MOST INTENSE RAINS STALLED OVER NORTHERN MARSHALL COUNTY JUST NORTH OF MARSHALLTOWN. THE STORM TOTAL PRECIPITATION HAS REACHED AMOUNTS OF 1 TO 3 INCHE S HOWEVER DURING THE PAST TEN MINUTES THE STORMS WERE WEAKENING. BE AWARE OF PONDING WATER AND LOCALIZED FLOODING IN DITCHES AND LOW LYING AREAS. KAUFMAN
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 7:12 PM CDT | Tornado Warning | DMX | Humboldt | 18 min |
| Jun 19, 4:32 PM CDT | Severe Thunderstorm Warning | DMX | Story | 28 min |
| Jun 19, 4:48 PM CDT | Tornado Warning | DMX | Hardin | 27 min |
| Jun 19, 5:44 PM CDT | Severe Thunderstorm Warning | DMX | Linn | 31 min |
| Jun 19, 6:09 PM CDT | Severe Thunderstorm Warning | DMX | Benton | 36 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1994Every severe thunderstorm warning in 1994
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.